Alert archive / Alabama / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 162, NWS Huntsville, AL
NWS Huntsville, AL issued this severe thunderstorm warning at Jun 11, 2009, 3:54 PM CDT for Jackson County, Alabama. It was in force for 51 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
- Jun 11, 2009, 3:54 PM CDT (20:54 UTC)
- Expired
- Jun 11, 2009, 4:45 PM CDT
- In force
- 51 min
- Issued by
- NWS Huntsville, AL
- Area
- Storm-based polygon
County Jackson County, AL
The radar
The Northeast Alabama radar (KHTX), 19 km from the middle of the area, began a volume at 20:55 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
Nashville Metro, TN (KBNA), launched 12:00Z, 8.9 hours before the alert went out and 160 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
- 2748 J/kg
- Mixed-layer CIN
- -5 J/kg
- Mixed-layer LCL
- 587 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 36 m²/s²
- 0-3 km storm-relative helicity
- 76 m²/s²
- Significant tornado parameter
- 0.8
- Supercell composite
- 4.5
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 Huntsville, AL wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 11, 2:59 PM CDT, 55 minutes earlier.
Area forecast discussion, Jun 11, 2:59 PM CDT, 55 minutes before
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</html>Hazardous weather outlook, Jun 11, 12:49 PM CDT, 3 hours 5 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE HUNTSVILLE AL 1249 PM CDT THU JUN 11 2009 ALZ001>010-016-TNZ076-096-097-120300- LAUDERDALE-COLBERT-FRANKLIN AL-LAWRENCE-LIMESTONE-MADISON-MORGAN- MARSHALL-JACKSON-DEKALB-CULLMAN-MOORE-LINCOLN-FRANKLIN TN- 1249 PM CDT THU JUN 11 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH ALABAMA AND PORTIONS OF SOUTHERN MIDDLE TENNESSEE. .DAY ONE...THIS AFTERNOON AND TONIGHT... SCATTERED SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE THIS AFTERNOON...AS A MOIST AIR MASS CONTINUES TO INTERACT WITH A STALLED FRONTAL BOUNDARY JUST NORTH OF THE TENNESSEE VALLEY. SOME OF THESE STORMS COULD BECOME STRONG...PRODUCING GUSTY WINDS...FREQUENT LIGHTNING AND LOCALLY HEAVY RAINFALL. SHOWER AND THUNDERSTORM ACTIVITY SHOULD DISSIPATE AROUND SUNSET. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY... THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. AN UNSETTLED WEATHER PATTERN WILL PERSIST THROUGH AT LEAST SATURDAY AS A SERIES OF UPPER LEVEL DISTURBANCES IMPACT THE AREA. SOME STORMS ON FRIDAY COULD BE STRONG TO SEVERE...CAPABLE OF HAIL AND GUSTY WINDS...IN ADDITION TO LOCALLY HEAVY RAINFALL. SHOWERS AND THUNDERSTORMS WILL LINGER THROUGH EARLY NEXT WEEK UNTIL A COLD FRONT MOVES THROUGH THE REGION. .SPOTTER CALL TO ACTION STATEMENT... ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT PERSONNEL IS NOT ANTICIPATED AT THIS TIME. 20
In the hours before
Special weather statement, Jun 11, 10:32 AM CDT, 5 hours 22 minutes before
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</html>Local storm report, Jun 11, 1:33 PM CDT, 2 hours 21 minutes before
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</html>Special weather statement, Jun 11, 3:14 PM CDT, 40 minutes before
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</html>The office that day
Everything else NWS Huntsville, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 11, 3:22 PM CDT | Severe Thunderstorm Warning | HUN | Jackson, Madison | 38 min |
| Jun 11, 4:30 PM CDT | Severe Thunderstorm Warning | HUN | DeKalb, Jackson | 30 min |
| Jun 11, 4:55 PM CDT | Severe Thunderstorm Warning | HUN | DeKalb | 35 min |
| Jun 11, 5:28 PM CDT | Severe Thunderstorm Warning | HUN | DeKalb, Jackson | 47 min |
Nearby
Severe Thunderstorm Warnings in Alabama, 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.