Alert archive / Alabama / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 169, NWS Mobile, AL
NWS Mobile, AL issued this severe thunderstorm warning at Aug 3, 2012, 4:20 PM CDT for Covington County, Alabama. It was in force for 25 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 3, 2012, 4:20 PM CDT (21:20 UTC)
- Expired
- Aug 3, 2012, 4:45 PM CDT
- In force
- 25 min
- Issued by
- NWS Mobile, AL
- Area
- Storm-based polygon
County Covington County, AL
The radar
The Eglin Afb radar (KEVX), 77 km from the middle of the area, began a volume at 21:23 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
Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 9.3 hours before the alert went out and 219 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
- 2919 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 540 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- -41 m²/s²
- 0-3 km storm-relative helicity
- 14 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
416 WUUS54 KMOB 032120 SVRMOB ALC039-032145- /O.NEW.KMOB.SV.W.0169.120803T2120Z-120803T2145Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOBILE AL 420 PM CDT FRI AUG 3 2012 THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTH CENTRAL COVINGTON COUNTY IN SOUTH CENTRAL ALABAMA... * UNTIL 445 PM CDT * AT 415 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS NEAR 60 MPH WAS LOCATED 11 MILES NORTHWEST OF FLORALA...OR 9 MILES NORTH OF LAUREL HILL...AND MOVING SLOWLY SOUTHEAST AT 6 MPH. * LOCATIONS IMPACTED INCLUDE... RURAL SOUTH CENTRAL COVINGTON COUNTY PRECAUTIONARY/PREPAREDNESS ACTIONS... CONTINUOUS CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY! IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. && LAT...LON 3102 8634 3101 8658 3114 8661 3120 8641 TIME...MOT...LOC 2120Z 323DEG 7KT 3109 8647 $$
1 follow-up statement
390 WWUS54 KMOB 032145 SVSMOB SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MOBILE AL 445 PM CDT FRI AUG 3 2012 ALC039-032154- /O.EXP.KMOB.SV.W.0169.000000T0000Z-120803T2145Z/ COVINGTON AL- 445 PM CDT FRI AUG 3 2012 ...THE SEVERE THUNDERSTORM WARNING HAS BEEN ALLOWED TO EXPIRE FOR SOUTH CENTRAL COVINGTON COUNTY... AT 443 PM CDT...THE STORM THAT PROMPTED THE WARNING FOR SOUTH CENTRAL COVINGTON COUNTY HAS WEAKENED TO BELOW SEVERE LIMITS...THUS THE SEVERE THUNDERSTORM WARNING WILL BE ALLOWED TO EXPIRE AT 445 PM CDT. WHILE NOT SEVERE...THUNDERSTORMS PERSISTING OVER COVINGTON COUNTY WILL STILL BE CAPABLE OF PRODUCING WINDS TO NEAR 50 MPH...SMALL HAIL TO THE SIZE OF NICKELS...AND DANGEROUS CLOUD TO GROUND LIGHTNING STRIKES THROUGH 6 PM. LAT...LON 3102 8634 3101 8658 3114 8661 3120 8641 TIME...MOT...LOC 2144Z 323DEG 7KT 3105 8644 $$
The office that day
Everything else NWS Mobile, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 3, 3:22 PM CDT | Areal Flood Advisory | MOB | Mobile | 113 min |
| Aug 3, 3:33 PM CDT | Severe Thunderstorm Warning | MOB | Mobile | 42 min |
| Aug 3, 4:40 PM CDT | Severe Thunderstorm Warning | MOB | Butler, Conecuh | 35 min |
| Aug 3, 5:12 PM CDT | Severe Thunderstorm Warning | MOB | Washington | 20 min |
Nearby
Severe Thunderstorm Warnings in Alabama, 2012Every severe thunderstorm warning in 2012
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.