Alert archive / Alabama / Special Weather Statements in 2013
Special Weather Statement, NWS Huntsville, AL
NWS Huntsville, AL issued this special weather statement at Aug 7, 2013, 4:51 PM CDT for DeKalb County, Alabama. It was in force for 39 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 7, 2013, 4:51 PM CDT (21:51 UTC)
- Expired
- Aug 7, 2013, 5:30 PM CDT
- In force
- 39 min
- Issued by
- NWS Huntsville, AL
County DeKalb County, AL
The radar
The Northeast Alabama radar (KHTX), 78 km from the middle of the area, began a volume at 21:53 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
Birmingham, AL (KBMX), launched 12:00Z, 9.9 hours before the alert went out and 147 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
- 1157 J/kg
- Mixed-layer CIN
- -57 J/kg
- Mixed-layer LCL
- 675 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- -15 m²/s²
- 0-3 km storm-relative helicity
- 18 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>What forecasters said that day
The local office's own words before this special weather statement 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 special weather statement went out at Aug 7, 4:44 PM CDT, 7 minutes earlier.
Area forecast discussion, Aug 7, 4:44 PM CDT, 7 minutes before
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HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE HUNTSVILLE AL 1045 AM CDT WED AUG 7 2013 ALZ001>010-016-TNZ076-096-097-081000- LAUDERDALE-COLBERT-FRANKLIN AL-LAWRENCE-LIMESTONE-MADISON-MORGAN- MARSHALL-JACKSON-DEKALB-CULLMAN-MOORE-LINCOLN-FRANKLIN TN- 1045 AM CDT WED AUG 7 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH ALABAMA AND PORTIONS OF SOUTHERN MIDDLE TENNESSEE. .DAY ONE...THIS AFTERNOON AND TONIGHT... SCATTERED TO NUMEROUS THUNDERSTORMS...SOME CONTAINING LOCALLY HEAVY RAINFALL...REMAIN POSSIBLE THROUGH THE AFTERNOON PERIOD. MULTIPLE EPISODES OF EXCESSIVE RAINFALL OVER THE SAME AREAS MAY STILL RESULT IN A LOCALIZED FLASH FLOODING THREAT...ESPECIALLY IN POOR DRAINAGE AND LOW LYING AREAS. THE FLOODING THREAT THOUGH MAY BE DIMINISHING SOME WITH THE BULK OF UPPER DISTURBANCES NOW TRACKING NORTH OF THE OUTLOOK AREA. OUTSIDE OF LOCALLY HEAVY DOWNPOURS...FREQUENT LIGHTNING AND GUSTY WINDS MAY OCCUR WITH SOME OF THE STRONGER STORMS. A DECREASE IN AREAL COVERAGE IS EXPECTED THIS EVENING...ALTHOUGH SCATTERED THUNDERSTORMS WITH HEAVY RAINFALL MAY STILL DEVELOP LATER TONIGHT. A FLASH FLOOD WATCH REMAINS IN EFFECT FOR THE ENTIRE FORECAST AREA THROUGH 7 AM CDT THURSDAY. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY... ADDITIONAL SHOWERS AND THUNDERSTORMS WILL REMAIN POSSIBLE LATE THIS WEEK AND OVER THE WEEKEND. BY THIS WEEKEND...THE HIGHEST CHANCES FOR STORMS WILL SHIFT TO THE AFTERNOON AND EVENING HOURS. THE MAIN HAZARDS WILL BE HEAVY RAINFALL...GUSTY WINDS AND FREQUENT LIGHTNING. .SPOTTER CALL TO ACTION STATEMENT... FORMAL ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT PERSONNEL IS NOT ANTICIPATED AT THIS TIME. HOWEVER...TIMELY REPORTS OF HIGH WATER AND FLOODING WILL BE GREATLY APPRECIATED.
In the hours before
Special weather statement, Aug 7, 2:27 PM CDT, 2 hours 24 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HUNTSVILLE AL 227 PM CDT WED AUG 7 2013 ALZ004-007-072030- MORGAN AL-LAWRENCE AL- 227 PM CDT WED AUG 7 2013 ...SIGNIFICANT WEATHER ADVISORY FOR WESTERN MORGAN AND EASTERN LAWRENCE COUNTIES UNTIL 330 PM CDT... AT 224 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM WITH HEAVY RAINFALL NEAR TRINITY...OR 10 MILES NORTHEAST OF MOULTON...MOVING SOUTHEAST AT 20 MPH. HEAVY DOWNPOURS...FREQUENT CLOUD TO GROUND LIGHTNING AND WIND GUSTS UP TO 30 MPH WILL BE POSSIBLE WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... HARTSELLE...TRINITY...FLINT CITY AND HILLSBORO. PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. LIGHTNING CAN STRIKE SEVERAL MILES AWAY FROM THE PARENT THUNDERSTORM. SEEK SAFE SHELTER INSIDE A BUILDING OR VEHICLE. HEAVY RAINFALL OCCURRING WITH THIS STORM MAY LEAD TO MINOR FLOODING ON ROADS AND IN LOW LYING AREAS. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS. && LAT...LON 3463 8728 3470 8715 3446 8688 3432 8715 TIME...MOT...LOC 1924Z 327DEG 16KT 3460 8718 09
Special weather statement, Aug 7, 3:22 PM CDT, 1 hour 29 minutes before
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</html>Special weather statement, Aug 7, 3:28 PM CDT, 1 hour 23 minutes before
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</html>Special weather statement, Aug 7, 3:54 PM CDT, 57 minutes before
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</html>Special weather statement, Aug 7, 4:51 PM CDT, 0 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 |
|---|---|---|---|---|
| Aug 7, 2:18 PM CDT | Special Weather Statement | HUN | Madison | 57 min |
| Aug 7, 2:21 PM CDT | Special Weather Statement | HUN | Madison | 54 min |
| Aug 7, 2:27 PM CDT | Special Weather Statement | HUN | Lawrence | 63 min |
| Aug 7, 3:22 PM CDT | Special Weather Statement | HUN | Marshall | 53 min |
| Aug 7, 3:28 PM CDT | Special Weather Statement | HUN | DeKalb | 62 min |
| Aug 7, 3:30 PM CDT | Flash Flood Warning | HUN | Lawrence | 3 hr |
| Aug 7, 3:42 PM CDT | Special Weather Statement | HUN | DeKalb | 63 min |
| Aug 7, 3:54 PM CDT | Special Weather Statement | HUN | Morgan | 51 min |
| Aug 7, 5:03 PM CDT | Special Weather Statement | HUN | Franklin | 57 min |
| Aug 7, 12:29 PM CDT | Special Weather Statement | HUN | Franklin, Moore | 61 min |
| Aug 7, 1:40 PM CDT | Special Weather Statement | HUN | Lincoln | 50 min |
Nearby
Special Weather Statements in Alabama, 2013Every special weather statement in 2013
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.