...SEVERAL STORM SURVEYS HAVE BEEN COMPLETED CONCERNING STORMS

PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
840 PM CDT WED APR 27 2011

...SEVERAL STORM SURVEYS HAVE BEEN COMPLETED CONCERNING STORMS
WHICH OCCURRED APRIL 25 AND APRIL 26...

THIS DAMAGE OCCURRED OVER A TWO DAY PERIOD BEGINNING MONDAY
MORNING ACROSS PORTIONS OF THE REGION...WITH MORE WIDESPREAD
DAMAGE NOTED ACROSS THE ENTIRE FOUR STATE REGION TUESDAY
AFTERNOON THROUGH TUESDAY NIGHT INTO EARLY WEDNESDAY MORNING.

BECAUSE OF THE NUMEROUS REPORTS OF DAMAGE WITH MULTIPLE
TORNADO WARNINGS ISSUED...IT WILL TAKE SEVERAL DAYS TO BEGIN
COMPLETING THE NECESSARY STORM DAMAGE SURVEYS ACROSS THE REGION.
AS SURVEYS ARE COMPLETED...TORNADOES WILL BE PLACED IN
CHRONOLOGICAL ORDER. DAMAGE SURVEYED WHICH IS DETERMINED TO BE NON
TORNADIC WILL BE PLACED AT THE END.

1. TATUM, TX
RATING: EF1
DATE: APRIL 26 2011
TIME: 6:35 PM THROUGH 6:54 PM
MAXIMUM WIDTH: 100 YDS
INJURIES: 0
FATALITIES: 0

DETAILS:
A FEW TREES WERE SNAPPED AT THEIR BASE AND HAD LARGE LIMBS BROKEN
OFF WITH THE INITIAL TOUCHDOWN ALONG CR 2138 SOUTHWEST OF TATUM.
IT CONTINUED ALONG A NORTHEAST PATH WHERE IT DESTROYED A STORAGE
OUTBUILDING AND UPROOTED SEVERAL TREES AT THE INTERSECTION OF FM
2187 AND HWY 149. THE TORNADO CONTINUED TO THE NORTHEAST WHERE IT
UPROOTED SEVERAL TREES AND RIPPED OFF THE TOPS OF SEVERAL MORE
ALONG CR 2216 AND CR 2221. THE TORNADO CONTINUED TO THE NORTHEAST
WHERE NUMEROUS TREE DAMAGE ALONG A PARALLEL PATH WITH HENDRICKS
LAKE ROAD WAS NOTED. THE TORNADO THEN BRIEFLY CROSSED INTO PANOLA
AND HARRISON COUNTIES KNOCKING OVER A FEW TREES ALONG HWY 43,
WHERE THE TORNADO THEN LIFTED. THE PATH LENGTH WAS 13.8 MILES AND
MAXIMUM WINDS WERE ESTIMATED AT 80-85 MPH.

2. 4 MILES SSE OF MARSHALL, TX
RATING: EF2
DATE: APRIL 26 2011
TIME: 7:04 PM THROUGH 7:14 PM
MAXIMUM WIDTH: 400 YDS
INJURIES: 0
FATALITIES: 0

DETAILS:
A FEW TREES WERE SNAPPED AT THEIR BASE AND HAD LARGE LIMBS BROKEN
OFF WITH THE INITIAL TOUCHDOWN ALONG FM 2625 JUST WEST OF HWY
59. THE TORNADO PARALLELED FM 2625 CAUSING SPORADIC TREE DAMAGE
UNTIL IT REACHED THE INTERSECTION OF FM 2625 AND TAYLOR ROAD. THE
TORNADO STRENGTHENED RAPIDLY IN A SHORT TIME FRAME, CAUSING EF2
DAMAGE TO TWO RESIDENTIAL HOMES AND EF1 DAMAGE TO A THIRD. ONE
HOUSE COMPLETELY LOST ITS ROOF WHILE ANOTHER HAD AN ENTIRE ROOM
DESTROYED. THE THIRD HOME HAD ITS METAL ROOF PEELED OFF WHILE
SUSTAINING PARTIAL WALL FAILURE. NUMEROUS TREES IN THE VICINITY OF
THE HOMES WERE COMPLETELY TOPPLED OR HAD THEIR TOPS SHEARED OFF.
THE TORNADO CONTINUED TO THE NORTHEAST WHERE IT INTERSECTED
BLOCKER ROAD NEAR FM 2625 SNAPPING AND UPROOTING NUMEROUS TREES.
THE TORNADO CONTINUED TO THE NORTHEAST DISSIPATING OVER A LOGGING
ROAD A MILE TO THE EAST OF BLOCKER RD. THE PATH LENGTH WAS 5.5
MILES AND MAXIMUM WINDS WERE ESTIMATED AT 120-125 MPH.

3. JONESVILLE, TX
RATING: EF0
DATE: APRIL 26 2011
TIME: 7:24 PM THROUGH 7:34 PM
MAXIMUM WIDTH: 70 YDS
INJURIES: 0
FATALITIES: 0

DETAILS:
A FEW TREES WERE SNAPPED WITH THE INITIAL TOUCHDOWN ALONG AND JUST
NORTH I-20, NEAR THE HWY 80 EXIT JUST WEST OF WASKOM. THE TORNADO
CONTINUED NORTHEAST CAUSING SPORADIC TREE DAMAGE ALONG BELLVIEW
ROAD. THE TORNADO THEN CONTINUED NORTHEAST WHERE IT TOPPLED
SEVERAL LARGE TREES AND KNOCKED DOWN LARGE LIMBS ALONG CONCORD
ROAD BETWEEN FM 134 AND OWEN GEORGE ROAD. THE TORNADO CONTINUED
NORTHEAST WHERE IT TOOK THE TOPS OFF OF A FEW TREES ALONG OWEN
GEORGE ROAD. THE TORNADO CONTINUED NORTHEAST KNOCKING OVER A FEW
TREES ALONG FM 9, WHERE IT FINALLY DISSIPATED. THE PATH LENGTH WAS
5.94 MILES AND MAXIMUM WINDS WERE ESTIMATED AT 70-75 MPH.

4. BENTON, LA
RATING: EF0
DATE: APRIL 26 2011
TIME: 7:34 PM THROUGH 7:39 PM
MAXIMUM WIDTH: 50 YDS
INJURIES: 0
FATALITIES: 0

DETAILS:
SEVERAL LARGE TREES WERE TOPPLED AND A FEW LARGE LIMBS WERE BROKEN
OFF TREES AT THE ENTRANCE OF THE MAGNOLIA CHASE SUBDIVISION ALONG
BENTON ROAD JUST SOUTH OF THE CITY OF BENTON. THE TORNADO
CONTINUED TO THE NORTH-NORTHEAST WHERE IT BROKE OFF LARGE LIMBS ON
A FEW TREES ALONG BENTON ROAD NEAR JACOBS TRAIL. THE TORNADO
CONTINUED TO THE NORTHEAST WHERE IT SNAPPED A TREE AT ITS BASE AND
KNOCKED DOWN A FEW LARGE LIMBS ALONG PALMETTO ROAD SOUTH OF THE
CITY OF BENTON. THE TORNADO CONTINUED NORTHEAST WHERE IT TOPPLED A
LARGE TREE NEAR THE INTERSECTION OF LARKIN STREET AND PALMETTO
ROAD AND FINALLY DISSIPATED. THE PATH LENGTH WAS 3.57 MILES AND MAXIMUM
WINDS WERE ESTIMATED AT 70-75 MPH.

5. KEACHI...FRIERSON, LA
RATING: EF2
DATE: APRIL 26 2011
TIME: 7:46 PM THROUGH 8:39 PM
MAXIMUM WIDTH: 0.5 MILES
INJURIES: 2
FATALITIES: 0

DETAILS:
THE NATIONAL WEATHER SERVICE CONDUCTED A STORM SURVEY IN PANOLA COUNTY
TEXAS...DESOTO...CADDO AND BOSSIER PARISHES IN LOUISIANA AND
TRACKED A LONG TRACK TORNADO. MOST OF THE DAMAGE ALONG THE PATH
CONSISTED OF EF0 TO EF1 TYPE DAMAGE. A FEW LOCATIONS NEAR KEACHI...LONGSTREET
AND FRIERSON EXHIBITED LOW END EF2 DAMAGE. THE TORNADO WAS
CONSISTENTLY ON THE GROUND FOR A CONTINUOUS 42 MILES. TREES WERE
SNAPPED AND UPROOTED...AND AS MANY AS 3 DOZEN HOMES SUSTAINED
MINOR DAMAGE WITH A FEW MODERATELY DAMAGED HOMES WHERE CARPORTS
WERE PEELED BACK OR TREES FELL ON THEM. SEVERAL BARNS WERE KNOCKED
OVER OR DESTROYED AS WELL. THE HEAVIEST DAMAGE WAS LOCATED IN THE
COMMUNITY OF FRIERSON WHERE WIDESPREAD TREE DAMAGE OCCURRED AND
THE TORNADO WAS AT ITS WIDEST POINT. OTHER DAMAGE ALONG AND JUST
SOUTH OF THE TORNADO TRACK IS RELATED TO REAR FLANK DOWNDRAFT
OTHERWISE KNOWN AS STRAIGHT LINE WINDS. THE TORNADO TRACKED FROM
EASTERN PANOLA COUNTY NEAR FM 3359 NORTHEAST INTO DESOTO PARISH
ACROSS BELLE BOWER TEXAS LINE ROAD...STATE ROUTE 3015 WHERE TREES
WERE SNAPPED OFF 4 TO 6 FEET OFF THE GROUND AND 2 TANKS FROM A GAS
WELL WERE OVERTURNED. THE TORNADO CONTINUED NORTHEAST CROSSING
STATE ROUTE 5 BETWEEN KEACHI AND LONGSTREET?THEN CROSSED SMYRNA
ROAD KNOCKING OVER TREES ONTO AND AROUND HOMES. THE TORNADO
CROSSED HWY 171 SOUTH OF THE HWY 5 AND 171 INTERSECTION AND
FOLLOWED ALONG JESSIE LATTIN WHERE A SEVERAL HOMES WERE DAMAGED
AND BARNS DESTROYED. THE STORM CONTINUED NORTHEAST CROSSING I49
WHERE RED BLUFF ROAD CROSSES UNDER. NUMEROUS TREES WERE DOWNED AND
INCREASED IN COVERAGE AS THE STORM MOVED INTO FRIERSON. THE
TORNADO CONTINUED NORTHEAST CROSSING THE INTERSECTION OF ELLERBE
ROAD AND HWY 1 WHERE SEVERAL PECAN TREES WERE SNAPPED THEN ACROSS
THE RED RIVER INTO BOSSIER PARISH AND ACROSS ATKINS CLARK ROAD
WHERE A MOBILE TRAILER WAS FLIPPED AT A GAS WELL INJURING THE
OCCUPANTS. THE TORNADO CONTINUED NORTHEAST CROSSING HWY 154 AND
157 INTERSECTION DAMAGING TREES AND POWERLINES BEFORE WEAKENING
AND LIFTING NEAR LAKE BISTENEAU. MAXIMUM WINDS ARE ESTIMATED AT
110 - 115 MPH.

6. DUBBERLY, LA
RATING: EF1
DATE: ARPIL 26 2011
TIME: 8:54 PM THROUGH 8:57 PM
MAXIMUM WIDTH: 150 YARDS
INJURIES: 0
FATALITIES: 0

DETAILS:
THE NATIONAL WEATHER SERVICE CONDUCTED A STORM SURVEY IN WEBSTER
PARISH LA NEAR DUBBERLY AND CONCLUDED THAT DAMAGE WAS THE RESULT
OF AN EF1 TORNADO. NUMEROUS TREES WERE SNAPPED AND UPROOTED SOUTH
OF SIBLEY EAST OF 371. THE TORNADO CONTINUED NORTHEAST INTO
DUBBERLY WHERE SEVERAL HOMES SUSTAINED ROOF DAMAGE. NUMEROUS TREES
WERE SNAPPED AND UPROOTED ALONG HWY 531NORTH OF DUBBERLY. THE
TORNADO LIFTED AS IT APPROACHED INTERSTATE 20. THE STORM
RESPONSIBLE FOR THIS TORNADO IS THE SAME CELL THAT PRODUCED A 42
MILE LONG TRACK ACROSS DESOTO PARISH. MAXIMUM WINDS ARE ESTIMATED
AT 95-105 MPH.

7. HALL SUMMIT, LA
RATING: EF1
DATE: APRIL 26 2011
TIME: 10:55 PM THROUGH 10:56 PM
MAXIMUM WIDTH: 125 YARDS
INJURIES: 0
FATALITIES: 0

DETAILS:
THE NATIONAL WEATHER SERVICE CONDUCTED A STORM SURVEY IN
RED RIVER PARISH LA NEAR HALL SUMMIT AND CONCLUDED THAT DAMAGE
WAS THE RESULT OF AN EF1 TORNADO. A COUPLE BARNS WERE DESTROYED
WEST OF TOWN NORTH OF STATE ROUTE 514. THE TORNADO CONTINUED EAST
SNAPPING AND UPROOTING TREES ALONG 514. SEVERAL HOMES IN TOWN
SUSTAINED MINOR TO MODERATE ROOF DAMAGE. THE TORNADO CROSSED 514
EAST OF HALL SUMMIT WHERE NUMEROUS TREES WERE SNAPPED ONTO THE
ROAD. THE TORNADO CONTINUED EAST CROSSING 371 KNOCKING OVER A FEW
TREES BEFORE LIFTING EAST OF 371. A SHERIFF DEPUTY WITNESSED THE
TORNADO CROSSING THE HWY EAST OF HALL SUMMIT AND WAS BLOCKED IN
FROM FALLING TREES. MAXIMUM WINDS ARE ESTIMATED AT 85-90 MPH.

Public Severe Weather Outlook

ZCZC SPCPWOSPC ALL
   WOUS40 KWNS 261153
   ARZ000-LAZ000-OKZ000-TXZ000-261800-
  
   PUBLIC SEVERE WEATHER OUTLOOK 
   NWS STORM PREDICTION CENTER NORMAN OK
   0653 AM CDT TUE APR 26 2011
  
   ...OUTBREAK OF SEVERE STORMS AND TORNADOES EXPECTED OVER PARTS OF
   THE SOUTHERN PLAINS AND LOWER MISSISSIPPI VALLEY THIS EVENING AND
   OVERNIGHT...
  
   THE NWS STORM PREDICTION CENTER IN NORMAN OK IS FORECASTING THE
   DEVELOPMENT OF A FEW STRONG LONG TRACK TORNADOES AND WIDESPREAD
   DAMAGING WIND OVER PARTS OF THE SOUTHERN PLAINS AND LOWER
   MISSISSIPPI VALLEY THIS EVENING AND OVERNIGHT.
  
   THE AREAS MOST LIKELY TO EXPERIENCE THIS ACTIVITY INCLUDE
  
          SOUTHERN ARKANSAS
          EXTREME NORTHWESTERN LOUISIANA
          SOUTHEASTERN OKLAHOMA
          NORTHEASTERN TEXAS
  
   ELSEWHERE...SEVERE STORMS ARE ALSO POSSIBLE FROM...THE OHIO AND
   TENNESSEE VALLEYS THROUGH THE LOWER MISSISSIPPI VALLEY AND EASTERN
   PORTIONS OF THE SOUTHERN PLAINS.
  
   STORMS ARE EXPECTED TO REDEVELOP LATER THIS AFTERNOON AND EVENING
   GENERALLY ALONG AND NORTH OF A WARM FRONT THAT WILL MOVE TO NEAR THE
   RED RIVER AREA OF TEXAS...EASTWARD THROUGH SOUTHERN ARKANSAS AS AN
   UPPER LEVEL STORM SYSTEM APPROACHES FROM THE WEST. THE STORMS ARE
   EXPECTED TO RAPIDLY BECOME SEVERE WITH POTENTIAL FOR LONG TRACK
   STRONG TORNADOES AND LARGE HAIL. THE THREAT FOR WIDESPREAD DAMAGING
   WIND MAY ALSO INCREASE...ESPECIALLY DURING THE EVENING AND OVERNIGHT
   FROM THE LOWER MS VALLEY INTO THE TENNESSEE VALLEY.
  
   STATE AND LOCAL EMERGENCY MANAGERS ARE MONITORING THIS POTENTIALLY
   VERY DANGEROUS SITUATION. THOSE IN THE THREATENED AREA ARE URGED TO
   REVIEW SEVERE WEATHER SAFETY RULES AND TO LISTEN TO
   RADIO...TELEVISION...AND NOAA WEATHER RADIO FOR POSSIBLE
   WATCHES...WARNINGS...AND STATEMENTS LATER TODAY.
  
   ..DIAL.. 04/26/2011
  
   $$       

Hazardous Weather Outlook

000
FLUS44 KSHV 191643
HWOSHV

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SHREVEPORT LA
1143 AM CDT TUE APR 19 2011

ARZ050-051-059>061-070>073-LAZ001>006-010>012-OKZ077-TXZ096-097-
108>112-124>126-136>138-149>153-201645-
SEVIER-HOWARD-LITTLE RIVER-HEMPSTEAD-NEVADA-MILLER-LAFAYETTE-
COLUMBIA-UNION AR-CADDO-BOSSIER-WEBSTER-CLAIBORNE-LINCOLN-
UNION LA-DE SOTO-RED RIVER-BIENVILLE-MCCURTAIN-BOWIE-FRANKLIN-
TITUS-CAMP-MORRIS-CASS-WOOD-UPSHUR-MARION-SMITH-GREGG-HARRISON-
CHEROKEE-RUSK-PANOLA-NACOGDOCHES-SHELBY-
1143 AM CDT TUE APR 19 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL
ARKANSAS...SOUTHWEST ARKANSAS...NORTH CENTRAL LOUISIANA...
NORTHWEST LOUISIANA...SOUTHEAST OKLAHOMA...EAST TEXAS AND
NORTHEAST TEXAS.

.DAY ONE...THIS AFTERNOON AND TONIGHT...
THUNDERSTORMS WILL BE DEVELOPING LATE TODAY JUST AHEAD OF AN
APPROACHING COLD FRONT. A VERY UNSTABLE ATMOSPHERE IS FORECAST TO
BE IN PLACE ACROSS THE REGION SO STORMS WILL HAVE THE POTENTIAL TO
BECOME SEVERE...PRODUCING LARGE HAIL AND DAMAGING WINDS. IN
ADDITION...ISOLATED TORNADOES MAY BE POSSIBLE DURING THE EVENING
HOURS ESPECIALLY IN THE INTERSTATE 30 CORRIDOR OF NORTHEAST
TEXAS...SOUTHEAST OKLAHOMA AND SOUTHWEST ARKANSAS.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY...
A COLD FRONT IS FORECAST TO STALL ACROSS THE REGION DURING THE DAY
WEDNESDAY PROVIDING A FOCUS FOR SCATTERED THUNDERSTORMS FOR MUCH
OF THE REST OF THE WEEK...INTO THE WEEKEND. HOWEVER...WIND SHEAR
WILL BE SOMEWHAT LIMITED...KEEPING RISK OF SEVERE WEATHER MORE
ISOLATED IN COVERAGE. HAIL AND DAMAGING WINDS WILL BE POSSIBLE WITH
ANY STORMS WHICH CAN REACH SEVERE LIMITS. WEDNESDAY APPEARS TO
HAVE THE HIGHEST RISK FOR STRONG TO SEVERE STORMS.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION WILL LIKELY BE NEEDED LATE THIS AFTERNOON...THROUGH
MUCH OF THE OVERNIGHT HOURS.

Day One Convective Outlook

   DAY 1 CONVECTIVE OUTLOOK 
   NWS STORM PREDICTION CENTER NORMAN OK
   1129 AM CDT TUE APR 19 2011
  
   VALID 191630Z - 201200Z
  
   ...THERE IS A MDT RISK OF SVR TSTMS THIS AFTERNOON AND TONIGHT OVER
   PARTS OF ERN OK...AR...CNTRL/SRN MO...WRN TN...KY...IL...IND AND WRN
   OH...
  
   ...THERE IS A SLGT RISK OF SVR TSTMS FROM THE LOWER GREAT LAKES SWWD
   INTO SRN TX...
  
   ...OUTBREAK OF SEVERE THUNDERSTORMS CAPABLE OF WIDESPREAD
   HAIL...DAMAGING WINDS AND A FEW STRONG TORNADOES POSSIBLE THIS
   AFTERNOON THROUGH TONIGHT...
  
   ...OH VALLEY/LOWER GREAT LAKES SWWD INTO ERN OK/AR...
  
   SHORTWAVE TROUGH OBSERVED OVER THE CNTRL/SRN HIGH PLAINS THIS
   MORNING WILL CONTINUE NEWD...CONTRIBUTING TO A CORRIDOR OF 30-60 M
   HEIGHT FALLS PER 12-HR AT 500 MB FROM THE CNTRL PLAINS THROUGH THE
   MID MS VALLEY INTO UPPER GREAT LAKES.  IN THE LOW-LEVELS...SURFACE
   LOW ATTENDANT TO THIS SYSTEM ANALYZED OVER W-CNTRL MO AS OF 16Z WILL
   DEVELOP NNEWD TO N OF STL BY 19/21Z...THE IL/IND BORDER NEAR DNV BY
   20/03Z TO LAKE ERIE BY 20/12Z.  A WARM FRONT WILL PRECEDE THE
   LOW...GRADUALLY LIFTING NWD THROUGH IL/IND/OH/PA.  TRAILING COLD
   FRONT WILL ADVANCE SEWD...LIKELY EXTENDING FROM SURFACE LOW OVER
   CNTRL IL SWWD THROUGH E-CNTRL MO...NWRN AR AND SERN OK BY 20/00Z.
   THIS COLD FRONT WILL SERVE AS THE PRIMARY FOCUS FOR SEVERE
   THUNDERSTORM DEVELOPMENT THIS AFTERNOON INTO TONIGHT.
  
   12Z REGIONAL SOUNDINGS SHOWED THE PRESENCE OF STEEP MIDLEVEL LAPSE
   RATES/EML IN PLACE FROM THE CNTRL/SRN PLAINS EWD THROUGH THE
   MID/LOWER MS VALLEYS.  THESE LAPSE RATES RESIDE ABOVE A MOIST AND
   RATHER BROAD WARM SECTOR CHARACTERIZED BY PW VALUES OF 1.0-1.5
   INCHES AND BOUNDARY LAYER DEWPOINTS IN THE 60S.  ASIDE FROM ISOLATED
   OCCURRENCES OF HAIL N OF WARM FRONT OVER THE OH VALLEY TODAY...A CAP
   AT THE BASE OF THE EML IS EXPECTED TO DELAY SURFACE-BASED TSTM
   DEVELOPMENT UNTIL THIS AFTERNOON.
  
   ABUNDANT SUNSHINE...THE STEEP LAPSE RATES AND INCREASING LOW-LEVEL
   MOISTURE WILL YIELD A MODERATELY TO STRONG UNSTABLE WARM SECTOR
   TODAY WITH MLCAPE VALUES RANGING FROM 1000-2000 J/KG S OF THE WARM
   FRONT IN THE OH VALLEY...TO 3000-4000+ J/KG AHEAD OF COLD FRONT FROM
   SRN MO INTO ERN OK/WRN AR.  FRONTAL UPLIFT COUPLED WITH INCREASED
   FORCING FOR ASCENT ATTENDANT TO MIDLEVEL TROUGH ARE EXPECTED TO
   FOSTER TSTM DEVELOPMENT BY MID AFTERNOON FROM THE VICINITY OF THE
   SURFACE LOW OVER CNTRL/E-CNTRL MO SWWD TO ERN OK/WRN AR.
  
   AN ISALLOBARICALLY BACKED WIND FIELD AHEAD OF SURFACE LOW WILL
   RESULT IN A CORRIDOR OF ENHANCED LOW-LEVEL SHEAR FROM E-CNTRL MO EWD
   THROUGH CNTRL PARTS OF IL/IND.  GIVEN MORE DISCRETE STORM MODES
   /I.E. SUPERCELLS/...THIS AREA WILL REPRESENT THE GREATEST RISK FOR
   TORNADOES /SOME POSSIBLY STRONG/ FROM LATE THIS AFTERNOON INTO
   TONIGHT.  OTHERWISE...EXPECT THE DEVELOPMENT OF SUPERCELLS AND LINE
   SEGMENTS ALONG COLD FRONT WITH EVENTUAL UPSCALE GROWTH INTO ONE OR
   MULTIPLE MCSS/QLCSS.  WIDESPREAD OCCURRENCES OF HAIL AND DAMAGING
   WINDS /SOME SIGNIFICANT/ ARE EXPECTED ACROSS THE MODERATE RISK AREA
   INTO EARLY WEDNESDAY DUE TO THE PRESENCE OF STEEP LAPSE RATES AND
   THE WIDE...UNSTABLE WARM SECTOR.
  
   ...TX...
  
   TSTM POTENTIAL AND ATTENDANT SEVERE WEATHER THREAT IS MORE UNCERTAIN
   WITH SWD EXTENT ALONG THE DRYLINE THIS AFTERNOON OWING TO WEAK OR
   NEGLIGIBLE LARGE-SCALE FORCING FOR ASCENT.  NONETHELESS...MORNING
   VISIBLE SATELLITE IMAGERY DOES SUGGEST THAT STRONG DIABATIC HEATING
   WILL OCCUR TODAY ALONG AND W OF DRYLINE...BOOSTING SURFACE
   TEMPERATURES INTO THE 90S.  SHOULD SUFFICIENT HEATING/CONVERGENCE
   DEVELOP TO INITIATE ISOLATED STORMS...THE PRESENCE OF MLCAPE VALUES
   OF 3000-4000+ J/KG AND 30-40 KT OF DEEP WLY SHEAR WILL BE SUPPORTIVE
   OF SUPERCELLS CAPABLE OF LARGE HAIL.  ANY STORMS THAT MAY DEVELOP
   WOULD LIKELY WEAKEN BY LATE EVENING AS THE BOUNDARY LAYER BEGINS TO
   COOL AND CONVECTIVE INHIBITION INCREASES.

April 14, 2011 - Tornadoes

000
NOUS44 KSHV 152226
PNSSHV
ARZ050-051-059>061-070>073-LAZ001>006-010>014-017>022-OKZ077-
TXZ096-097-108>112-124>126-136>138-149>153-165>167-161030-

PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
526 PM CDT FRI APR 15 2011

...STORM SURVEYS HAVE BEEN COMPLETED FOR SOUTHEASTERN OKLAHOMA
CONCERNING DAMAGE RESULTING FROM TORNADOES ON APRIL 14TH...

THE NATIONAL WEATHER SERVICE CONDUCTED A STORM SURVEY IN MCCURTAIN
COUNTY OKLAHOMA AND FOUND EVIDENCE OF AN EF0 TORNADO NEAR
SMITHVILLE. THE TORNADO FIRST TOUCHED DOWN ALONG US 259 SOUTHWEST
OF SMITHVILLE WHERE SEVERAL TREES WERE SNAPPED ON POWER LINES IN
FRONT OF A HOME. THE TORNADO CROSSED US 259 AND SNAPPED A FEW
TREES ALONG THE BANK OF MOUNTAIN FORK RIVER. NEAR THE END OF THE
TRACK...A LARGE TREE WAS SNAPPED OFF ALONG HWY 4 EAST OF
SMITHVILLE AND SEVERAL LARGE BRANCHES WERE BROKEN FROM TREES IN
THE AREA. MAXIMUM WINDS ARE ESTIMATED AT 65-70 MPH. THE TORNADO
WAS 2.5 MILES LONG AND 75 YARDS WIDE...ON THE GROUND FROM 10:33 PM CDT
THROUGH 10:36 PM CDT.

AN EF0 TORNADO WITH A PATH LENGTH OF 75 YARDS AND 4.5 MILES ALSO
OCCURRED 6 MILES SOUTHEAST OF RINGOLD. NUMEROUS TREES WERE
UPROOTED OR SNAPPED. ONE BARN WAS DESTROYED AND ONE HOME HAD MINOR
ROOF DAMAGE.

A THIRD EF0 TORNADO OCCURRED NEAR HOCHATOWN. THE TORNADO FIRST
TOUCHED DOWN ALONG MEADOW LAKE DRIVE IN BEAVER BEND STATE PARK.
SEVERAL TREES WERE UPROOTED WHILE OTHERS HAD THEIR TOPS RIPPED
OFF. THE TORNADO CONTINUED EAST CROSSING COYOTE DRIVE UPROOTING A
FEW TREES IN A CAMPING AREA. THE TORNADO FINALLY LIFTED ALONG THE
SHORELINE OF LAKE BROKEN BOW. MAXIMUM WINDS ARE ESTIMATED AT 65-70
MPH. THE TORNADO WAS 1.3 MILES LONG AND 75 YARDS WIDE...ON THE
GROUND FROM 11:37 PM CDT TO 11:38 PM CDT.

$$

PDS Tornado Watch #135

URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 135
   NWS STORM PREDICTION CENTER NORMAN OK
   230 PM CDT THU APR 14 2011
  
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF
  
          MUCH OF THE EASTERN HALF OF OKLAHOMA
          PARTS OF NORTH CENTRAL/NORTHEASTERN TEXAS
  
   EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 230 PM UNTIL
   1000 PM CDT.
  
   ...THIS IS A PARTICULARLY DANGEROUS SITUATION...
  
   DESTRUCTIVE TORNADOES...LARGE HAIL TO 4 INCHES IN DIAMETER...
   THUNDERSTORM WIND GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE
   POSSIBLE IN THESE AREAS.
  
   THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 80 STATUTE
   MILES EAST AND WEST OF A LINE FROM 15 MILES NORTH NORTHEAST OF
   BARTLESVILLE OKLAHOMA TO 40 MILES SOUTH SOUTHEAST OF SHERMAN
   TEXAS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED
   WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).
  
   REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
   TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
   AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
   THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
   AND POSSIBLE WARNINGS.
  
   OTHER WATCH INFORMATION...CONTINUE...WW 134...
  
   DISCUSSION...DRY LINE LOCATED VICINITY I-35 CORRIDOR WITH THE AIR
   MASS NOW VERY UNSTABLE EWD ACROSS OK.  WITH LITTLE REMAINING
   CINH...SEVERE THUNDERSTORMS WILL DEVELOP RAPIDLY OFF THE DRY LINE
   AND MOVE THRU A VERY FAVORABLE ENVIRONMENT FOR SUPERCELLS. INITIALLY
   VERY LARGE HAIL WILL BE THE RISK GIVEN THE STEEP LAPSE RATES AND
   DEEP LAYER SHEAR.  AS THE STRONG UPPER JET MAX APPROACHES TORNADIC
   SUPERCELLS WILL BECOME MORE LIKELY BY LATER  THIS AFTERNOON/EVENING
   WITH POTENTIAL FOR LONG LIVED SUPERCELLS AND STRONG TORNADOES.  DRY
   LINE VERY LIKELY WILL MOVE LITTLE EWD FROM CURRENT POSITION WITH
   POTENTIAL FOR SEVERE STORMS DEVELOPING ON W EDGE OF WATCH INTO THE
   EVENING HOURS.
  
   AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
   SURFACE AND ALOFT TO 4 INCHES. EXTREME TURBULENCE AND SURFACE
   WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
   550. MEAN STORM MOTION VECTOR 24035

National Situation Update: Wednesday, April 13, 2011

Significant National Weather

WestA low pressure system will generate a variety of inclement weather across the Central Great Basin.  Snow showers will continue into the evening with snowfall amounts of one or two inches in the valleys.  Isolated thunderstorms are forecast across portions of Nevada with wind gusts of up to 50 mph.  Also, Critical Fire Weather conditions are forecast across southeast Arizona, southern New Mexico and west Texas throughout the day, due to low relative humidity and gusty winds.

MidwestIsolated thunderstorms are forecast from eastern Wyoming to the Great Lakes.  Tonight, an area of low pressure will move through the Central Plains bringing snow to northeast Wyoming and most South Dakota. Several inches of snow will be possible, with the heaviest snowfall over central South Dakota.
SouthUnder an area of high pressure, most of the region will remain sunny and dry.  Red Flag Warnings will remain in effect through this evening for portions of the Florida Panhandle, southern Alabama and southern Georgia, due to low relative humidity and gusty winds.
NortheastA low pressure system moving across the Southern Appalachians will produce moderate to heavy rain as it moves northeastward into New England during the early morning.  Periods of light to heavy rain will continue this evening over most .  (National Weather Service, Hydrometeorological Prediction Center, and various media sources).

Potential Dam Failure in North Dakota

On April 12, the North Dakota State Water Commission reports erosion has been observed at Burlington #1 Dam on the Des Lacs River in Ward County in north central North Dakota. This extra strain has increased the threat of a possible dam failure. There is a moderate to high risk that this dam will fail within the next 24 hours and personnel monitoring the dam were removed for safety reasons.
Based on worst case scenario simulations, if the dam was to fail, residents below the dam should expect an additional 2 to 3 foot rise in Water Level.  Residents 1 mile below the dam will experience a 1.1 foot increase above current river stage values.  This level will likely continue to the confluence between the Des Lacs and the Mouse (Souris).
Local authorities have issued an evacuation order for approximately 50 -100 residences. The ND National Guard and the Game and Fish Department have prepositioned equipment in Minot, ND in anticipation of potential response operations.  Also, the Governor has requested that Ward County be added to the Emergency Declaration (FEMA-3318-EM-ND), since the dam is owned and operated by the county.  There are no additional requests for FEMA assistance.

Midwest Spring Flooding

Major to minor flooding continues across many of the rivers in the Upper Midwest.

Earthquake Activity

On April 13, at 12:28 a.m., EDT, a 5.1 magnitude earthquake occurred 124 miles east-northeast of San Juan, PR at a depth of 19.3 miles.  No damages or injuries have been reported and no tsunami was generated.   (USGS)

Fire Activity

Tuesday, April 12, 2011

• National Preparedness Level: 1
• Initial attack activity: Moderate (324 new fires)
• New Large Fires: 7
• Large Fires Contained: 6
• Uncontained Large Fires: 19
• Type 1 IMTs Committed: 1
• Type 2 IMTs Committed: 0
• States affected: CO, NM, TX, OK, MO, GA, KS and FL (NIFC)

Wildfire Activity
Rockhouse Fire (Presido County, TX)
On April 9, a FMAG was approved for the Rockhouse Fire in Presidio County.  As of April 12, the fire had burned approximately 108,000 acres and was 60 percent contained. A Type I Incident Management Team assumed command of the fire on April 12.

Disaster Declaration Activity

No new activity Amendment No. 1 to FEMA-1961-DR-MO was approved on April 11, adding Camden County for Public Assistance.(FEMA HQ)