Hazardous Weather Outlook

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
806 PM CDT MON MAY 20 2013

GMZ330-335-350-355-370-375-TXZ163-164-176>179-195>200-210>214-226-
227-235>238-211200-
AUSTIN-BRAZORIA-BRAZOS-BURLESON-CHAMBERS-COLORADO-FORT BEND-
GALVESTON-GALVESTON BAY-GRIMES-HARRIS-HOUSTON-JACKSON-LIBERTY-
MADISON-MATAGORDA-MATAGORDA BAY-MONTGOMERY-POLK-SAN JACINTO-
TRINITY-WALKER-WALLER-WASHINGTON-
WATERS FROM FREEPORT TO THE MATAGORDA SHIP CHANNEL 20 NM TO 60 NM-
WATERS FROM FREEPORT TO THE MATAGORDA SHIP CHANNEL OUT 20 NM-
WATERS FROM HIGH ISLAND TO FREEPORT 20 TO 60 NM-
WATERS FROM HIGH ISLAND TO FREEPORT OUT 20 NM-WHARTON-
806 PM CDT MON MAY 20 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST TEXAS.

.DAY ONE...TONIGHT
ISOLATED STRONG TO SEVERE THUNDERSTORMS ARE POSSIBLE ACROSS CENTRAL
TEXAS. THIS ACTIVITY IS NOT EXPECTED TO AFFECT SOUTHEAST TEXAS THIS
EVENING.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY
THERE IS A RISK OF STRONG TO SEVERE THUNDERSTORMS VERY LATE TUESDAY
AFTERNOON THROUGH TUESDAY EVENING FOR LOCATIONS MAINLY NORTH OF A
LINE FROM COLUMBUS TO HOUSTON TO LIVINGSTON. STRONG DAMAGING WINDS
AND LARGE HAIL ARE EXPECTED TO BE THE PRIMARY SEVERE WEATHER
THREAT. ISOLATED TORNADOES MAY DEVELOP TOO.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION MAY BE REQUIRED LATE TUESDAY AFTERNOON THROUGH
TUESDAY EVENING.

$$

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE FORT WORTH TX
249 PM CDT MON MAY 20 2013

TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-211215-
MONTAGUE-COOKE-GRAYSON-FANNIN-LAMAR-YOUNG-JACK-WISE-DENTON-COLLIN-
HUNT-DELTA-HOPKINS-STEPHENS-PALO PINTO-PARKER-TARRANT-DALLAS-
ROCKWALL-KAUFMAN-VAN ZANDT-RAINS-EASTLAND-ERATH-HOOD-SOMERVELL-
JOHNSON-ELLIS-HENDERSON-COMANCHE-MILLS-HAMILTON-BOSQUE-HILL-NAVARRO-
FREESTONE-ANDERSON-LAMPASAS-CORYELL-BELL-MCLENNAN-FALLS-LIMESTONE-
LEON-MILAM-ROBERTSON-
249 PM CDT MON MAY 20 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH TEXAS.

.DAY ONE...THIS AFTERNOON AND TONIGHT.
SEVERE THUNDERSTORMS ARE EXPECTED TO FORM ALONG THE DRYLINE THIS
AFTERNOON AND WILL MOVE EAST AND NORTHEAST ACROSS MAINLY THE
WESTERN AND NORTHWESTERN PARTS OF THE AREA THROUGH THE EVENING
HOURS. THE HIGHEST CHANCES OF SEVERE WEATHER ARE GENERALLY WEST OF
A LINE FROM SHERMAN TO DENTON TO GRANBURY TO KILLEEN. ATMOSPHERIC
CONDITIONS WILL BE FAVORABLE FOR VERY LARGE HAIL...DAMAGING WINDS
AND POSSIBLE TORNADOES. AS THE STORMS HEAD EAST INTO MORE STABLE
AIR ACROSS CENTRAL PARTS OF NORTH TEXAS...THEY SHOULD WEAKEN BELOW
SEVERE LEVELS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.
SCATTERED TO NUMEROUS THUNDERSTORMS WILL BE POSSIBLE OVER THE AREA
TUESDAY AND INTO TUESDAY NIGHT. A SQUALL LINE MAY ORGANIZE ALONG A
COLD FRONT DURING THE AFTERNOON HOURS AND PRODUCE A SWATH OF
DAMAGING WIND AS IT HEADS EAST AND SOUTHEAST. LARGE HAIL AND
ISOLATED TORNADOES WILL CONTINUE TO BE THREATS IN ANY STORM THAT
IS SEPARATED FROM THE LINE.

A SLIGHT CHANCE OF THUNDERSTORMS RETURNS THURSDAY NIGHT AND FRIDAY
MORNING GENERALLY NORTH OF THE I-20 CORRIDOR.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION IS LIKELY THIS AFTERNOON IN WESTERN
COUNTIES...SPREADING EAST OVERNIGHT AS THE THUNDERSTORMS MOVE
ACROSS NORTH TEXAS.

$$


92

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SHREVEPORT LA
1200 PM CDT MON MAY 20 2013

ARZ072-073-LAZ001>006-010>014-017>022-TXZ126-136>138-149>153-165>167-
211100-
ANGELINA-BIENVILLE-BOSSIER-CADDO-CALDWELL-CHEROKEE-CLAIBORNE-
COLUMBIA-DE SOTO-GRANT-GREGG-HARRISON-JACKSON-LA SALLE-LINCOLN-
MARION-NACOGDOCHES-NATCHITOCHES-OUACHITA-PANOLA-RED RIVER LA-RUSK-
SABINE LA-SABINE TX-SAN AUGUSTINE-SHELBY-SMITH-UNION AR-UNION LA-
WEBSTER-WINN-
1200 PM CDT MON MAY 20 2013

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

.DAY ONE...THIS AFTERNOON AND TONIGHT...

NO HAZARDOUS WEATHER IS EXPECTED.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY...

SCATTERED SHOWERS AND THUNDERSTORMS WILL DEVELOP TUESDAY ACROSS
PORTIONS OF NORTHEAST TEXAS AND SOUTHWEST ARKANSAS...ALONG
RESIDUAL BOUNDARIES FROM EARLIER THUNDERSTORMS. STRONG DAYTIME
HEATING WITHIN A VERY MOIST AIR MASS WILL RESULT IN STRONG
INSTABILITY TUESDAY AFTERNOON...AS LARGE SCALE FORCING INCREASES
WITH THE APPROACH OF AN UPPER LEVEL TROUGH OF LOW PRESSURE FROM
THE WEST. SOME THUNDERSTORMS WILL HAVE THE POTENTIAL TO BECOME
SEVERE TUESDAY AFTERNOON OVER NORTHEAST TEXAS AND SOUTHWEST
ARKANSAS...AND INTO NORTH LOUISIANA TUESDAY EVENING...AS THEY SPREAD
EAST SOUTHEAST. HIGH AND DAMAGING WINDS AND LARGE HAIL WILL BE THE
PRIMARY SEVERE WEATHER THREATS...WITH DEADLY LIGHTNING AND A THREAT
FOR LOCALLY HEAVY RAINFALL AS STORMS GROW INTO LARGE CLUSTERS. THESE
CLUSTERS WILL PROGRESS OVER THE AREA TUESDAY NIGHT. LOCALIZED FLASH
FLOODING AND PONDING OF WATER IN STREETS...LOW LYING...AND POOR
DRAINAGE AREAS WILL BE POSSIBLE TUESDAY NIGHT. THE SEVERE
WEATHER AND HEAVY RAINFALL THREAT WILL DIMINISH LATE TUESDAY NIGHT
AND EARLY WEDNESDAY MORNING...WITH SHOWERS AND THUNDERSTORMS
END FROM WEST TO EAST ON WEDNESDAY.

.SPOTTER INFORMATION STATEMENT...

ACTIVATION OF EMERGENCY MANAGEMENT PERSONNEL...AMATEUR RADIO
OPERATORS...AND STORM SPOTTERS WILL NOT BE NEEDED THIS AFTERNOON
OR TONIGHT.

$$

06

Short Term Forecast

SHORT TERM FORECAST
NATIONAL WEATHER SERVICE FORT WORTH TX
231 AM CDT TUE MAY 21 2013

TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-211000-
MONTAGUE-COOKE-GRAYSON-FANNIN-LAMAR-YOUNG-JACK-WISE-DENTON-COLLIN-
HUNT-DELTA-HOPKINS-STEPHENS-PALO PINTO-PARKER-TARRANT-DALLAS-
ROCKWALL-KAUFMAN-VAN ZANDT-RAINS-EASTLAND-ERATH-HOOD-SOMERVELL-
JOHNSON-ELLIS-HENDERSON-COMANCHE-MILLS-HAMILTON-BOSQUE-HILL-
NAVARRO-FREESTONE-ANDERSON-LAMPASAS-CORYELL-BELL-MCLENNAN-FALLS-
LIMESTONE-LEON-MILAM-ROBERTSON-
231 AM CDT TUE MAY 21 2013

.NOW...
AT 230 A.M. ISOLATED SHOWERS WERE LOCATED NEAR A LINE FROM LOMETA
TO CLIFTON...MOVING NORTHEAST AT ABOUT 35 TO 40 MPH. A FEW OF
THESE SHOWERS MAY DEVELOP INTO THUNDERSTORMS...PRODUCING LIGHTNING
AND BRIEF HEAVY RAIN. COVERAGE SHOULD REMAIN LOW THROUGH
SUNRISE...BUT BY MID MORNING THUNDER CHANCES WILL INCREASE AGAIN
BEGINNING NEAR THE RED RIVER.


$$