Alert archive / Louisiana / Severe Thunderstorm Warnings in 2010
Severe Thunderstorm Warning 280, NWS Shreveport, LA
NWS Shreveport, LA issued this severe thunderstorm warning at Nov 1, 2010, 10:02 PM CDT for Bossier Parish, Webster Parish, Louisiana; Columbia County, Lafayette County, Arkansas. It was in force for 58 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
- Nov 1, 2010, 10:02 PM CDT (03:02 UTC)
- Expired
- Nov 1, 2010, 11:00 PM CDT
- In force
- 58 min
- Issued by
- NWS Shreveport, LA
- Area
- Storm-based polygon
Counties Columbia County, AR, Lafayette County, AR, Bossier Parish, LA, Webster Parish, LA
The radar
The Shreveport radar (KSHV), 68 km from the middle of the area, began a volume at 03:06 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 |
|---|---|---|---|
| Nov 1, 7:52 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
The nearest sounding before it
Shreveport, LA (KSHV), launched 00:00Z, 3.0 hours before the alert went out and 61 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
- 1892 J/kg
- Mixed-layer CIN
- -11 J/kg
- Mixed-layer LCL
- 1186 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 83 m²/s²
- 0-3 km storm-relative helicity
- 178 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 6.1
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 Nov 1, 2:35 PM CDT, 7 hours 27 minutes earlier.
Area forecast discussion, Nov 1, 2:35 PM CDT, 7 hours 27 minutes before
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</html>Hazardous weather outlook, Nov 1, 11:49 AM CDT, 10 hours 13 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SHREVEPORT LA 1149 AM CDT MON NOV 1 2010 ARZ050-051-059>061-070>073-LAZ001>006-010>014-017>022-OKZ077- TXZ096-097-108>112-124>126-136>138-149>153-165>167-021215- SEVIER-HOWARD-LITTLE RIVER-HEMPSTEAD-NEVADA-MILLER-LAFAYETTE- COLUMBIA-UNION AR-CADDO-BOSSIER-WEBSTER-CLAIBORNE-LINCOLN- UNION LA-DE SOTO-RED RIVER-BIENVILLE-JACKSON-OUACHITA-SABINE LA- 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-SABINE TX- 1149 AM CDT MON NOV 1 2010 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...THIS AFTERNOON AND TONIGHT... SHOWERS AND THUNDERSTORMS WILL BEGIN TO DEVELOP LATER THIS AFTERNOON AS A LOW PRESSURE SYSTEM APPROACHES FROM THE WEST. THIS CONVECTIVE ACTIVITY WILL INCREASE IN COVERAGE THROUGH THE EVENING ACROSS NORTHEAST TEXAS AND WESTERN LOUISIANA. A FEW OF THESE STORMS MAY BECOME SEVERE...PRODUCING LARGE HAIL AND DAMAGING WINDS. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY... RAINFALL...WITH SOME EMBEDDED THUNDERSTORMS...WILL BECOME WIDESPREAD INTO TUESDAY...AND BEGIN TO DIMINISH BY EARLY WEDNESDAY. RAINFALL AMOUNTS OF TWO TO OVER THREE INCHES ARE POSSIBLE DURING THIS PERIOD ACROSS NORTH-CENTRAL LOUISIANA...WHILE SOUTHWEST ARKANSAS...NORTHWEST LOUISIANA...NORTHEAST TEXAS...AND SOUTHEAST OKLAHOMA...WILL GENERALLY SEE BETWEEN ONE AND TWO INCHES OF RAIN. .SPOTTER INFORMATION STATEMENT... THE ACTIVATION OF EMERGENCY MANAGERS...SKYWARN NETWORKS...AND STORM SPOTTERS...MAY BE POSSIBLE THROUGH TONIGHT. 05
In the hours before
Local storm report, Nov 1, 8:51 PM CDT, 1 hour 11 minutes before
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</html>Local storm report, Nov 1, 8:59 PM CDT, 1 hour 3 minutes before
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</html>Local storm report, Nov 1, 9:25 PM CDT, 37 minutes before
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</html>Local storm report, Nov 1, 9:27 PM CDT, 35 minutes before
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</html>Local storm report, Nov 1, 9:30 PM CDT, 32 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 |
|---|---|---|---|---|
| Nov 1, 8:54 PM CDT | Severe Thunderstorm Warning | SHV | Cass | 66 min |
| Nov 2, 12:54 AM CDT | Areal Flood Advisory | SHV | Sabine | 3 hr |
| Nov 2, 2:21 AM CDT | Severe Thunderstorm Warning | SHV | Shelby | 27 min |
| Nov 1, 8:36 PM CDT | Severe Thunderstorm Warning | SHV | Bossier, Caddo | 54 min |
| Nov 1, 9:17 PM CDT | Severe Thunderstorm Warning | SHV | Bossier | 43 min |
| Nov 1, 9:30 PM CDT | Severe Thunderstorm Warning | SHV | Bossier, Caddo | 45 min |
| Nov 1, 10:01 PM CDT | Severe Thunderstorm Warning | SHV | Hempstead, Lafayette, Miller, Nevada | 59 min |
| Nov 1, 10:30 PM CDT | Severe Thunderstorm Warning | SHV | Columbia, Union | 45 min |
| Nov 1, 10:57 PM CDT | Severe Thunderstorm Warning | SHV | Hempstead, Howard | 32 min |
| Nov 1, 11:05 PM CDT | Severe Thunderstorm Warning | SHV | Hempstead, Nevada | 25 min |
Nearby
Severe Thunderstorm Warnings in Louisiana, 2010Severe Thunderstorm Warnings in Arkansas, 2010Every severe thunderstorm warning in 2010
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.