Special Weather Statement, NWS Shreveport, LA

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Hazardous Weather Outlook
National Weather Service Shreveport LA
525 AM CDT Tue May 22 2018

ARZ050-051-059>061-070>073-LAZ001>006-010>014-017>022-OKZ077-
TXZ096-097-108>112-124>126-136>138-149>153-165>167-231100-
Sevier-Howard-Little River-Hempstead-Nevada-Miller-Lafayette-
Columbia-Union-Caddo-Bossier-Webster-Claiborne-Lincoln-De Soto-
Red River-Bienville-Jackson-Ouachita-Sabine-Natchitoches-Winn-
Grant-Caldwell-La Salle-McCurtain-Bowie-Franklin-Titus-Camp-
Morris-Cass-Wood-Upshur-Marion-Smith-Gregg-Harrison-Cherokee-Rusk-
Panola-Nacogdoches-Shelby-Angelina-San Augustine-
525 AM CDT Tue May 22 2018

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...Today and Tonight...

Isolated to scattered thunderstorms will be possible today and
into tonight across the entire Four State Region. The best chances
for thunderstorms will be this afternoon during peak daytime
heating. This activity should slowly decrease through the evening
and nighttime hours. Brief heavy downpours, gusty winds, and
frequent cloud to ground lightning will be the primary threats.
While an isolated storm could become severe, widespread severe
thunderstorms are not expected.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday...

Scattered thunderstorms are expected each day through the weekend
and into early next week. The greatest thunderstorm activity is
expected each afternoon during peak daytime heating, and any
storms that develop will gradually dissipate during the evening.
Brief heavy downpours, gusty winds, and frequent cloud to ground
lightning will be possible, but widespread severe weather is not
expected.

A tropical low pressure system moving northward from the Gulf of
Mexico and along the Mississippi River may provide more widespread
and persistent thunderstorm chances across mainly Southern
Arkansas and Northern Louisiana Saturday through Monday.

.SPOTTER INFORMATION STATEMENT...

Activation of emergency management personnel, amateur radio
operators, and storm spotters is not anticipated through tonight.

09

Special Weather Statement
National Weather Service Shreveport LA
236 PM CDT TUE MAY 22 2018

ARZ072-LAZ003-004-222015-
Columbia AR-Claiborne LA-Webster LA-
236 PM CDT TUE MAY 22 2018

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN COLUMBIA COUNTY...
NORTH CENTRAL WEBSTER AND NORTHWESTERN CLAIBORNE PARISHES UNTIL 315
PM CDT...

At 236 PM CDT, Doppler radar was tracking a strong thunderstorm over
Shongaloo, or 12 miles southeast of Springhill, moving north at 5
mph.

Winds in excess of 40 mph will be possible with this storm.

Locations impacted include...
Springhill, Haynesville, Cullen, Emerson, Shongaloo, Welcome,
Evergreen, Leton, Horsehead and Walkerville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3284 9304 3275 9335 3302 9350 3302 9349
      3305 9349 3315 9318
TIME...MOT...LOC 1936Z 158DEG 6KT 3291 9327

12

Special Weather Statement
National Weather Service Shreveport LA
312 PM CDT TUE MAY 22 2018

ARZ050-051-222100-
Howard AR-Sevier AR-
312 PM CDT TUE MAY 22 2018

...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL SEVIER AND
NORTHWESTERN HOWARD COUNTIES UNTIL 400 PM CDT...

At 312 PM CDT, Doppler radar was tracking a strong thunderstorm 7
miles southwest of Umpire, moving northeast at 15 mph.

Winds in excess of 45 mph will be possible with this storm.

Locations impacted include...
Umpire, Gillham, Athens, Lebanon and Burg.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3435 9399 3435 9394 3431 9393 3406 9409
      3417 9438 3419 9437 3419 9424 3427 9424
      3427 9426 3436 9425
TIME...MOT...LOC 2012Z 204DEG 15KT 3422 9417

12