Alert archive / Alabama / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 396, NWS Birmingham, AL
NWS Birmingham, AL issued this severe thunderstorm warning at Jun 30, 1999, 4:50 PM CDT for Elmore County, Montgomery County, Alabama. It was in force for 60 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 30, 1999, 4:50 PM CDT (21:50 UTC)
- Expired
- Jun 30, 1999, 5:50 PM CDT
- In force
- 60 min
- Issued by
- NWS Birmingham, AL
- Area
- Whole counties
Counties Elmore County, AL, Montgomery County, AL
The radar
The Maxwell AFB radar (KMXX), 39 km from the middle of the area, began a volume at 21:49 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, 9.8 hours before the alert went out and 103 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
- 953 J/kg
- Mixed-layer CIN
- -81 J/kg
- Mixed-layer LCL
- 1000 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 35 m²/s²
- 0-3 km storm-relative helicity
- 47 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
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.
In the hours before
Special weather statement, Jun 30, 11:25 AM CDT, 5 hours 25 minutes before
ALZ001>050-GAZ089-090-102-120-011400- HAZARDOUS WEATHER OUTLOOK FOR NORTH/CENTRAL AL AND WEST CENTRAL GA NATIONAL WEATHER SERVICE BIRMINGHAM AL 1125 AM CDT WED JUN 30 1999 A WEAK FRONTAL BOUNDARY STRETCHED ACROSS CENTRAL ALABAMA. LIFTED INDICES IN THE VICINITY OF THIS BOUNDARY WERE IN THE -6 TO -8 RANGE WITH CAPE VALUES NEAR 3000 J/KG. ISOLATED SEVERE THUNDERSTORMS WERE ALREADY FORMING ALONG THIS BOUNDARY AND MORE ISOLATED SEVERE THUNDERSTORMS WILL FORM THIS AFTERNOON...MAINLY IN CENTRAL AND SOUTH ALABAMA AHEAD OF THE DIFFUSE FRONTAL BOUNDARY. THE MAIN THREAT WILL BE FROM HEAVY RAIN AND FLOODING OF FLOOD PRONE AND URBANIZED AREAS AND DAMAGING THUNDERSTORM OUTFLOWS. HAIL UP TO 1 INCH IN DIAMETER MAY ALSO OCCUR BUT ONLY WITH THE STRONGEST STORMS AND IN VERY LOCALIZED AREAS. FOR THE HAZARDOUS WEATHER OUTLOOK FOR SOUTHWEST ALABAMA...SEE PRODUCT BHMSPSMOB. FOR SOUTHEAST ALABAMA...LOOK AT MIASPSTLH. FOR MORE WEATHER INFORMATION VISIT OUR INTERNET SITE ON THE WORLD WIDE WEB AT: HTTP://WWW.ACES.EDU/NWS/
Special weather statement, Jun 30, 11:25 AM CDT, 5 hours 25 minutes before
ALZ001>050-GAZ089-090-102-120-011400- HAZARDOUS WEATHER OUTLOOK FOR NORTH/CENTRAL AL AND WEST CENTRAL GA NATIONAL WEATHER SERVICE BIRMINGHAM AL 1125 AM CDT WED JUN 30 1999 A WEAK FRONTAL BOUNDARY STRETCHED ACROSS CENTRAL ALABAMA. LIFTED INDICES IN THE VICINITY OF THIS BOUNDARY WERE IN THE -6 TO -8 RANGE WITH CAPE VALUES NEAR 3000 J/KG. ISOLATED SEVERE THUNDERSTORMS WERE ALREADY FORMING ALONG THIS BOUNDARY AND MORE ISOLATED SEVERE THUNDERSTORMS WILL FORM THIS AFTERNOON...MAINLY IN CENTRAL AND SOUTH ALABAMA AHEAD OF THE DIFFUSE FRONTAL BOUNDARY. THE MAIN THREAT WILL BE FROM HEAVY RAIN AND FLOODING OF FLOOD PRONE AND URBANIZED AREAS AND DAMAGING THUNDERSTORM OUTFLOWS. HAIL UP TO 1 INCH IN DIAMETER MAY ALSO OCCUR BUT ONLY WITH THE STRONGEST STORMS AND IN VERY LOCALIZED AREAS. FOR THE HAZARDOUS WEATHER OUTLOOK FOR SOUTHWEST ALABAMA...SEE PRODUCT BHMSPSMOB. FOR SOUTHEAST ALABAMA...LOOK AT MIASPSTLH. FOR MORE WEATHER INFORMATION VISIT OUR INTERNET SITE ON THE WORLD WIDE WEB AT: HTTP://WWW.ACES.EDU/NWS/
The office that day
Everything else NWS Birmingham, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 30, 10:24 AM CDT | Severe Thunderstorm Warning | BMX | Chilton, Coosa | 31 min |
| Jun 30, 10:57 AM CDT | Severe Thunderstorm Warning | BMX | Coosa | 33 min |
| Jun 30, 3:26 PM CDT | Flash Flood Warning | BMX | Bibb, Perry | 119 min |
| Jun 30, 4:27 PM CDT | Severe Thunderstorm Warning | BMX | Autauga | 48 min |
| Jun 30, 5:22 PM CDT | Flash Flood Warning | BMX | Autauga, Elmore, Montgomery | 2 hr |
| Jun 30, 5:29 PM CDT | Severe Thunderstorm Warning | BMX | St. Clair | 31 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.