Hazardous Weather Outlook
Issued by NWS Shreveport, LA

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FLUS44 KSHV 211046
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Hazardous Weather Outlook
National Weather Service Shreveport LA
546 AM CDT Fri Apr 21 2017

ARZ050-051-059>061-070>073-OKZ077-TXZ096-097-108>112-124>126-
136>138-221100-
Sevier-Howard-Little River-Hempstead-Nevada-Miller-Lafayette-
Columbia-Union-McCurtain-Red River-Bowie-Franklin-Titus-Camp-
Morris-Cass-Wood-Upshur-Marion-Smith-Gregg-Harrison-
546 AM CDT Fri Apr 21 2017

This Hazardous Weather Outlook is for portions of south central
Arkansas, southwest Arkansas, southeast Oklahoma and northeast
Texas.

.DAY ONE...Today and Tonight...

Isolated to scattered showers and thunderstorms will develop this
afternoon near a quasi-stationary cold frontal boundary across
portions of southeast Oklahoma, southwest Arkansas and extreme
northeast Texas. Some of these thunderstorms could approach strong
levels with small hail and brief wind gusts being the primary
threats. These showers and thunderstorms are expected to increase
in coverage by mid to late this evening over extreme Northeast
Texas, into much of Southwest Arkansas, along and ahead of a cold
front associated with an upper level low pressure system that will
shift east across northeast Oklahoma and northern Arkansas. Given
the strong shear and instability parameters expected this
evening, some of these storms may become severe over portions of
northeast Texas, southeast Oklahoma, and southwest Arkansas with
large hail and damaging winds possible. Furthermore, can not rule
isolated tornadoes. These storms are expected to weaken several
hours after midnight tonight with the gradual loss of instability
and weakening frontal forcing.


.DAYS TWO THROUGH SEVEN...Saturday through Thursday...

Upon the exiting of the strong upper level storm system late
tonight, a much cooler and drier airmass will settle in across the
Four-State region, resulting in overnight temperatures both on
Saturday and Sunday night dipping down into the 40s and 50s.
A warming trend will take place early next week.

.SPOTTER INFORMATION STATEMENT...

Activation of emergency management personnel...amateur radio
operators...and storm spotters will be required late this
afternoon through this evening.

$$

LAZ001>006-010>014-017>022-TXZ149>153-165>167-221100-
Caddo-Bossier-Webster-Claiborne-Lincoln-Union-De Soto-Red River-
Bienville-Jackson-Ouachita-Sabine-Natchitoches-Winn-Grant-
Caldwell-La Salle-Cherokee-Rusk-Panola-Nacogdoches-Shelby-
Angelina-San Augustine-
546 AM CDT Fri Apr 21 2017

This Hazardous Weather Outlook is for portions of north central
Louisiana, northwest Louisiana, east Texas and northeast Texas.

.DAY ONE...Today and Tonight...

Isolated to scattered showers and thunderstorms will increase
along a cold front mid to late this evening through the overnight
hours as an upper level storm system shifts east across northeast
Oklahoma and northern Arkansas. Although a few of the
thunderstorms could approach strong levels and produce gusty winds
and small hail, the best chance for severe thunderstorms will
occur north of Interstate 20. Thunderstorm coverage is expected to
wane from northwest to southeast several hours after midnight.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday...

Upon the exiting of the strong upper level storm system late
tonight, a much cooler and drier airmass will settle in across the
Four-State region, resulting in overnight temperatures both on
Saturday and Sunday night dipping down into the 40s and 50s.
A warming trend will take place early next week.

.SPOTTER INFORMATION STATEMENT...

Although an isolated strong storm can not be ruled out late this
afternoon through the evening hours, widespread severe
thunderstorms are not expected. Therefore activation of
emergency management personnel...amateur operators...and storm
spotters should not be need through tonight.


$$


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