Alert archive / Arkansas / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 145, NWS Shreveport, LA
NWS Shreveport, LA issued this severe thunderstorm warning at May 6, 2009, 12:29 AM CDT for Howard County, Arkansas. It was in force for 31 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- May 6, 2009, 12:29 AM CDT (05:29 UTC)
- Expired
- May 6, 2009, 1:00 AM CDT
- In force
- 31 min
- Issued by
- NWS Shreveport, LA
- Area
- Storm-based polygon
County Howard County, AR
The radar
The Western Arkansas radar (KSRX), 138 km from the middle of the area, began a volume at 05:29 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 5, 10:27 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
The nearest sounding before it
Shreveport, LA (KSHV), launched 00:00Z, 5.5 hours before the alert went out and 180 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 2555 J/kg
- Mixed-layer CIN
- -7 J/kg
- Mixed-layer LCL
- 724 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 183 m²/s²
- 0-3 km storm-relative helicity
- 386 m²/s²
- Significant tornado parameter
- 5.7
- Supercell composite
- 23.2
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Shreveport, LA wrote its last area forecast discussion before this severe thunderstorm warning went out at May 5, 9:20 PM CDT, 3 hours 9 minutes earlier.
Area forecast discussion, May 5, 9:20 PM CDT, 3 hours 9 minutes before
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</html>Hazardous weather outlook, May 5, 12:00 PM CDT, 12 hours 29 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SHREVEPORT LA 1200 PM CDT TUE MAY 5 2009 ARZ050-051-059-070-OKZ077-TXZ096-097-108>112-061101- BOWIE-CAMP-CASS-FRANKLIN-HOWARD-LITTLE RIVER-MCCURTAIN-MILLER-MORRIS- RED RIVER TX-SEVIER-TITUS- 1200 PM CDT TUE MAY 5 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST ARKANSAS...NORTHWEST LOUISIANA...SOUTHEAST OKLAHOMA AND NORTHEAST TEXAS. .DAY ONE...THIS AFTERNOON AND TONIGHT... A COMPLEX OF THUNDERSTORMS ACROSS SOUTHERN OKLAHOMA...WILL MOVE INTO SOUTHEAST OKLAHOMA...AND BORDERING AREAS OF NORTHEAST TEXAS AND EXTREME SOUTHWEST ARKANSAS...BY LATE THIS AFTERNOON. LARGE HAIL SHOULD BE THE MAIN SEVERE WEATHER THREAT WITH THESE STORMS...ALTHOUGH DAMAGING WINDS AND ISOLATED TORNADOES COULD BECOME A POSSIBILITY IF THE STORMS HAPPEN TO BECOME MORE SURFACE BASED. IN ADDITION...HEAVY RAIN IN THE BALLPARK OF 1 TO 2 INCHES IN AN HOURS TIME...OR 3 TO 4 INCHES OVER THE PERIOD OF A FEW HOURS...IS POSSIBLE. AS SOME OF THIS RAINFALL MAY OCCUR OVER AREAS WHICH RECEIVED 4 TO 6 INCHES OF RAIN WITHIN THE PAST FEW DAYS...FLASH FLOODING COULD BECOME A THREAT IN NORTHEAST TEXAS...SOUTHEAST OKLAHOMA...AND EXTREME SOUTHWEST ARKANSAS...IN ADDITION TO THE THREAT OF SEVERE THUNDERSTORMS. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY... HEAVY RAIN IS EXPECTED TO CONTINUE THROUGH THE EARLY MORNING HOURS OF WEDNESDAY...RESULTING IN A CONTINUED FLASH FLOODING THREAT ACROSS THE AREA. AN ADDITIONAL 1-2 INCHES OF RAIN IS POSSIBLE. ALTHOUGH THE THREAT OF SEVERE THUNDERSTORMS MAY DECREASE...THE POSSIBILITY OF ISOLATED SEVERE STORMS WILL REMAIN. .SPOTTER INFORMATION STATEMENT... ACTIVATION OF EMERGENCY MANAGERS...HAM RADIO OPERATORS...AND STORM SPOTTERS MAY BE REQUIRED DURING THE LATE AFTERNOON AND EVENING. ARZ060-061-071>073-LAZ001>006-012>014-TXZ124>126-136>138-061101- BIENVILLE-BOSSIER-CADDO-CLAIBORNE-COLUMBIA-GREGG-HARRISON-HEMPSTEAD- JACKSON-LAFAYETTE-LINCOLN-MARION-NEVADA-OUACHITA-SMITH-UNION AR- UNION LA-UPSHUR-WEBSTER-WOOD- 1200 PM CDT TUE MAY 5 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL ARKANSAS...SOUTHWEST ARKANSAS...NORTH CENTRAL LOUISIANA AND NORTHWEST LOUISIANA. .DAY ONE...THIS AFTERNOON AND TONIGHT... A SERIES OF UPPER LEVEL DISTURBANCES WILL PUSH OUT OF THE CENTRAL PLAINS AND ACROSS THE NORTHERN HALF OF THE FOUR STATE REGION BEGINNING EARLY THIS EVENING. ATMOSPHERIC INSTABILITY DURING LATE AFTERNOON SHOULD BE SUFFICIENT TO GENERATE A FEW STRONG STORMS... WITH AN INCREASING THREAT OF SEVERE STORMS THIS EVENING...WITH DAMAGING WINDS AN LARGE HAIL THE MAIN THREAT. HOWEVER...AN ISOLATED TORNADO IS ALSO POSSIBLE. IN ADDITION...HEAVY RAIN IN THE BALLPARK OF 1 TO 2 INCHES WILL BE LIKELY. SOME OF THIS RAIN WILL FALL OVER AREAS WHICH RECEIVED 3 TO 5 INCHES OF RAIN WITHIN THE PAST FEW DAYS. AS A RESULT...FLASH FLOODING WILL BE A THREAT IN NORTH CENTRAL LOUISIANA...AND SOUTH CENTRAL ARKANSAS...IN ADDITION TO THE THREAT OF SEVERE THUNDERSTORMS. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY... HEAVY RAIN IS EXPECTED TO CONTINUE THROUGH THE EARLY MORNING HOURS OF WEDNESDAY...RESULTING IN A CONTINUED FLASH FLOODING THREAT ACROSS THE AREA. AN ADDITIONAL 1-2 INCHES OF RAIN IS POSSIBLE. ALTHOUGH THE THREAT OF SEVERE THUNDERSTORMS MAY DECREASE...THE POSSIBILITY OF ISOLATED SEVERE STORMS WILL REMAIN. .SPOTTER INFORMATION STATEMENT... ACTIVATION OF EMERGENCY MANAGERS...HAM RADIO OPERATORS...AND STORM SPOTTERS MAY BE REQUIRED BY EVENING. LAZ010-011-017>022-TXZ149>153-165>167-061101- ANGELINA-CALDWELL-CHEROKEE-DE SOTO-GRANT-LA SALLE-NACOGDOCHES- NATCHITOCHES-PANOLA-RED RIVER LA-RUSK-SABINE LA-SABINE TX- SAN AUGUSTINE-SHELBY-WINN- 1200 PM CDT TUE MAY 5 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL LOUISIANA...NORTHWEST LOUISIANA...EAST TEXAS AND NORTHEAST TEXAS. .DAY ONE...THIS AFTERNOON AND TONIGHT... SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP LATER THIS AFTERNOON AS A WARM FRONT MOVES NORTHWARD ACROSS THE AREA. A FEW STORMS COULD REACH SEVERE LIMITS BY THIS EVENING... WITH LARGE HAIL...AND BRIEF BUT DAMAGING WIND GUSTS...BEING THE MAIN THREAT. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY... HEAVY RAIN IS EXPECTED TO CONTINUE THROUGH THE EARLY MORNING HOURS OF WEDNESDAY...RESULTING IN PONDING OF WATER ON ROADS AND LOW LYING AREAS. SOME MINOR FLOODING IS ALSO POSSIBLE. THERE WILL ALSO BE THE POSSIBILITY OF AN ISOLATED STORM BECOMING SEVERE. .SPOTTER INFORMATION STATEMENT... ACTIVATION OF EMERGENCY MANAGERS...HAM RADIO OPERATORS...AND STORM SPOTTERS IS NOT ANTICIPATED AT THIS TIME...DUE TO THE ISOLATED NATURE OF THE SEVERE WEATHER THREAT. VII
In the hours before
Special weather statement, May 5, 10:15 PM CDT, 2 hours 14 minutes before
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</html>Local storm report, May 5, 10:46 PM CDT, 1 hour 43 minutes before
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</html>The office that day
Everything else NWS Shreveport, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 5, 7:23 PM CDT | River Flood Warning | SHV | Gregg, Harrison, Marion, Upshur | 39 hr |
| May 6, 6:13 AM CDT | Severe Thunderstorm Warning | SHV | Red River | 62 min |
| May 6, 6:28 AM CDT | Severe Thunderstorm Warning | SHV | Franklin, Red River, Titus | 62 min |
| May 6, 7:00 AM CDT | Flash Flood Warning | SHV | Camp, Franklin, Morris, Red River, Titus | 4 hr |
| May 6, 7:09 AM CDT | Severe Thunderstorm Warning | SHV | Camp, Franklin, Smith, Upshur, Wood | 51 min |
| May 6, 7:21 AM CDT | Severe Thunderstorm Warning | SHV | Bowie, Camp, Cass, Franklin, Morris, Red River and 1 more | 46 min |
| May 6, 7:47 AM CDT | Flash Flood Warning | SHV | Upshur, Wood | 4 hr |
| May 6, 8:35 AM CDT | River Flood Warning | SHV | Bowie, Red River | 3 days |
| May 6, 10:00 AM CDT | River Flood Warning | SHV | Gregg, Rusk | 14 days |
| May 6, 10:11 AM CDT | River Flood Warning | SHV | Gregg, Harrison, Marion, Upshur | 5 days |
| May 6, 8:20 AM CDT | River Flood Warning | SHV | Bienville, Bossier, Webster | 17 days |
| May 5, 10:21 PM CDT | Severe Thunderstorm Warning | SHV | Nevada | 24 min |
| May 6, 6:54 AM CDT | Flash Flood Warning | SHV | Hempstead, Howard, Little River, Miller, Nevada, Sevier | 3 hr |
| May 6, 7:16 AM CDT | Severe Thunderstorm Warning | SHV | Hempstead, Howard, Nevada | 44 min |
| May 6, 10:14 AM CDT | River Flood Warning | SHV | Union | 57 days |
Nearby
Severe Thunderstorm Warnings in Arkansas, 2009Every severe thunderstorm warning in 2009
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.