Alert archive / Texas / Severe Thunderstorm Warnings in 2007
Severe Thunderstorm Warning 274, NWS Shreveport, LA
NWS Shreveport, LA issued this severe thunderstorm warning at Sep 27, 2007, 5:29 PM CDT for Morris County, Titus County, Texas. It was in force for 46 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
- Sep 27, 2007, 5:29 PM CDT (22:29 UTC)
- Expired
- Sep 27, 2007, 6:15 PM CDT
- In force
- 46 min
- Issued by
- NWS Shreveport, LA
- Area
- Counties, with a storm outline in the text
Counties Morris County, TX, Titus County, TX
The radar
The Shreveport radar (KSHV), 123 km from the middle of the area, began a volume at 22:29 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 nearest sounding before it
Shreveport, LA (KSHV), launched 12:00Z, 10.5 hours before the alert went out and 128 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
- 1082 J/kg
- Mixed-layer CIN
- -48 J/kg
- Mixed-layer LCL
- 840 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 38 m²/s²
- 0-3 km storm-relative helicity
- 27 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.2
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 Sep 27, 3:59 PM CDT, 1 hour 30 minutes earlier.
Area forecast discussion, Sep 27, 3:59 PM CDT, 1 hour 30 minutes before
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</html>Hazardous weather outlook, Sep 27, 12:00 PM CDT, 5 hours 29 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SHREVEPORT LA 1200 PM CDT THU SEP 27 2007 ARZ050-051-059>061-070>073-LAZ001>006-010>014-017>022-OKZ077-TXZ096- 097-108>112-124>126-136>138-149>153-165>167-281100- ANGELINA-BIENVILLE-BOSSIER-BOWIE-CADDO-CALDWELL-CAMP-CASS-CHEROKEE- CLAIBORNE-COLUMBIA-DE SOTO-FRANKLIN-GRANT-GREGG-HARRISON-HEMPSTEAD- HOWARD-JACKSON-LA SALLE-LAFAYETTE-LINCOLN-LITTLE RIVER-MARION- MCCURTAIN-MILLER-MORRIS-NACOGDOCHES-NATCHITOCHES-NEVADA-OUACHITA- PANOLA-RED RIVER LA-RED RIVER TX-RUSK-SABINE LA-SABINE TX- SAN AUGUSTINE-SEVIER-SHELBY-SMITH-TITUS-UNION AR-UNION LA-UPSHUR- WEBSTER-WINN-WOOD- 1200 PM CDT THU SEP 27 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST OKLAHOMA...NORTHEAST TEXAS...SOUTHWEST ARKANSAS...NORTHWEST AND NORTH CENTRAL LOUISIANA. .DAY ONE...THIS AFTERNOON AND TONIGHT... A MOIST AIRMASS REMAINS IN PLACE ACROSS THE FOUR STATE REGION AND A NEARLY STATIONARY COLD FRONT IS POISED TO MOVE ACROSS THE AREA. EXPECT SCATTERED SHOWERS AND THUNDERSTORMS AS TEMPERATURES WARM AND COMBINE WITH AN APPROACHING COLD FRONT NUDGED SOUTHEAST AS AN UPPER DISTURBANCE SWINGS THROUGH OVERHEAD. ANY THUNDERSTORMS THAT DEVELOP WILL HAVE THE CAPABILITY TO PRODUCE STRONG WIND GUSTS... FREQUENT CLOUD TO GROUND LIGHTNING...AND BRIEF LOCALLY HEAVY RAINFALL. HEAVY RAINS THAT DO OCCUR WILL PRODUCE PONDING OF WATER IN LOW LYING AND POOR DRAINAGE AREAS. THE ACTIVITY SHOULD SHIFT SOUTH OF THE REGION OVERNIGHT TONIGHT. HIGH PRESSURE WILL BE BUILDING INTO THE FOUR STATE REGION AFTER FRONTAL PASSAGE. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY... NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... ACTIVATION OF SKYWARN SPOTTERS...HAM RADIO OPERATORS...AND EMERGENCY MANAGEMENT IS NOT EXPECTED TODAY OR TONIGHT. 06
In the hours before
Local storm report, Sep 27, 2:50 PM CDT, 2 hours 39 minutes before
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</html>Local storm report, Sep 27, 3:18 PM CDT, 2 hours 11 minutes before
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</html>Local storm report, Sep 27, 4:49 PM CDT, 40 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 |
|---|---|---|---|---|
| Sep 27, 3:46 AM CDT | Dense Fog Advisory | SHV | Bowie, Camp, Cass, Franklin, Marion, Morris and 4 more | 5 hr |
| Sep 27, 2:21 PM CDT | Severe Thunderstorm Warning | SHV | Rusk | 24 min |
| Sep 27, 3:41 PM CDT | Severe Thunderstorm Warning | SHV | Red River | 49 min |
| Sep 27, 4:12 PM CDT | Severe Thunderstorm Warning | SHV | Nacogdoches, Shelby | 63 min |
| Sep 27, 6:35 PM CDT | Severe Thunderstorm Warning | SHV | Upshur | 55 min |
| Sep 27, 6:50 PM CDT | Severe Thunderstorm Warning | SHV | Gregg | 55 min |
Nearby
Severe Thunderstorm Warnings in Texas, 2007Every severe thunderstorm warning in 2007
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.