Alert archive / Alabama / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 224, NWS Mobile, AL
NWS Mobile, AL issued this severe thunderstorm warning at Aug 25, 1999, 6:08 PM CDT for Choctaw County, Alabama. It was in force for 37 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Aug 25, 1999, 6:08 PM CDT (23:08 UTC)
- Expired
- Aug 25, 1999, 6:45 PM CDT
- In force
- 37 min
- Issued by
- NWS Mobile, AL
- Area
- Whole counties
County Choctaw County, AL
The radar
The Mobile radar (KMOB), 149 km from the middle of the area, began a volume at 23:10 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 25, 6:20 PM CDT | Hail 0.75 | Gilbertown, AL | Dime size hail was reported near Gilbertown. |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The nearest sounding before it
Birmingham, AL (KBMX), launched 12:00Z, 11.1 hours before the alert went out and 190 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
- 648 J/kg
- Mixed-layer CIN
- -73 J/kg
- Mixed-layer LCL
- 787 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 53 m²/s²
- 0-3 km storm-relative helicity
- 74 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.3
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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 Mobile, AL wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 25, 2:34 PM CDT, 3 hours 34 minutes earlier.
Area forecast discussion, Aug 25, 2:34 PM CDT, 3 hours 34 minutes before
AREA FORECAST DISCUSSION...CORRECTED FOR MOB POP... NATIONAL WEATHER SERVICE MOBILE AL 200 PM CDT WED AUG 25 1999 500 MB LOW OVER WESTERN INDIANA EARLIER CONTINUES SLOWLY EASTWARD TOWARD EASTERN INDIANA ATTM. TO WEAKEN OVER OHIO BY 00Z FRIDAY. MCS DEVLOPING...AND DISCUSSED EARLIER THIS MORNING DID NOT REPEAT YESTERDAYS EVOLUTION. THOUGH AREA TO S OF IT WAS DOMINIATED BY REGION OF SURFACE MOISTURE FLUX CONVERGENCE AND HIGH RH...NOTHING HAPPENED. CONVECTION LIT UP ALONG COAST AS EXPECTED AROUND MID MORNING. ETA DID MODEL INITIALIZATION BEST AGAIN TODAY...AND CONSIDERABLY BETTER THAN YESTERDAY...ESP SURFACE STREAMLINE AND T/TD ANALYSIS. ALL TREATED VORT MAX OVER OH VALLEY PRETTY MUCH THE SAME...BUT DAMPED IT BY TAU12. AVN RAN AHEAD WITH IT JUST A TAD...BUT ALL GENERALLY IN AGMT THROUGH TAU 48...OR 12Z FRIDAY. COLD FRONT TO CONTINUE SOUTH INTO THE MARITIMES AND BOUNCE OFF THE COASTLINE BEFORE PARKING ITSELF OVER THE FA TOMORROW...EXTENDING FROM DOTHAN TO HATTIESBURG. 1000-700 MB MEAN RH AIR ALOFT WILL GET DRY IN A HURRY. HIGH SURFACE BASED RH REMAINS JUST S OF THE FRONT TO KEEP CHANCE POPS FOR THE COASTAL COUNTIES THRU TOMORROW. EXPECT LESS CONVECTION COVERAGE ON THURSDAY BUT BECAUSE FRONT STAYS INLAND THIS CYCLE... THUS GOIN FOR COASTAL POPS A BIT HIGHER THAN FAN FOR TOMORROW EXCEPT EAST INTO DTS. FAN TEMPS AND INLAND POPS TO REMAIN UNTOUCHED BY HUMAN MEDDLING. MOB TB 073/094 071/093 071 7733- PNS TB 074/094 072/094 073 77331 DTS TB 074/094 072/094 073 77321 GZH TB 071/093 068/093 070 773-1 61A TB 071/093 068/093 070 773-1 2RO TB 069/092 066/094 067 77301 MOB MOBILE REGIONAL AL PNS PENSACOLA REGIONAL FL DTS DESTIN FL GZH EVERGREEN AL 61A CAMDEN AL (WILCOX COUNTY) 2RO WAYNESBORO MS (WAYNE COUNTY)
The office that day
Everything else NWS Mobile, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 25, 3:27 PM CDT | Severe Thunderstorm Warning | MOB | Conecuh | 78 min |
| Aug 25, 3:35 PM CDT | Tornado Warning | MOB | Escambia | 70 min |
| Aug 25, 4:48 PM CDT | Severe Thunderstorm Warning | MOB | Wilcox | 57 min |
Nearby
Severe Thunderstorm Warnings in Alabama, 1999Every severe thunderstorm warning in 1999
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.