Alert archive / Alabama / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 96, NWS Birmingham, AL
NWS Birmingham, AL issued this severe thunderstorm warning at Jun 21, 1990, 10:13 AM CDT for Blount County, Alabama. It was in force for 62 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
- Jun 21, 1990, 10:13 AM CDT (15:13 UTC)
- Expired
- Jun 21, 1990, 11:15 AM CDT
- In force
- 62 min
- Issued by
- NWS Birmingham, AL
- Area
- Whole counties
County Blount County, AL
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 21, 10:30 AM CDT | Thunderstorm Wind 0 | Blount, AL |
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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Centreville/Bibb, AL (KCKL), launched 12:00Z, 3.2 hours before the alert went out and 134 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
- 1904 J/kg
- Mixed-layer CIN
- -79 J/kg
- Mixed-layer LCL
- 1025 m above ground
- 0-6 km bulk shear
- 4 kt
- 0-1 km storm-relative helicity
- -37 m²/s²
- 0-3 km storm-relative helicity
- -10 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KBHM 211515 SVRBHM ALC009-211615- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE BIRMINGHAM AL 1013 AM CDT THU JUN 21 1990 THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1115 AM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN NORTH ALABAMA ...BLOUNT COUNTY AT 1010 AM WEATHER SERVICE RADAR INDICATED A SEVERE THUNDERSTORM EAST OF BLOUNTSVILLE IN NORTHERN BLOUNT COUNTY. OTHER POSSIBLE SEVERE THUNDERSTORMS WERE MOVING INTO WESTERN BLOUNT COUNTY. THESE THUNDERSTORMS WERE MOVING EAST AT 20 TO 30 MPH. WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A STRONG BUILDING. DO NOT STAND BY WINDOWS. DON'T USE TELEPHONES OR ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY UNTIL THE STORM HAS PASSED. MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS.
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 21, 9:22 AM CDT, 51 minutes before
ALZ004>007-011-181530- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BIRMINGHAM AL 920 AM CDT THU JUN 21 1990 ...STRONG THUNDERSTORMS FORMING IN NORTH CENTRAL ALABAMA... AT 917 AM NATIONAL WEATHER SERVICE RADAR SHOWED A BROKEN LINE OF SHOWERS AND THUNDERSTORMS FORMING RAPIDLY IN NORTH CENTRAL ALABAMA... STRETCHING FROM BLOUNT COUNTY INTO CULLMAN...WALKER...AND FAYETTE COUNTIES. THE STRONGEST STORM AT THAT TIME WAS IN EXTREME NORTHERN BLOUNT COUNTY. THESE SHOWERS AND THUNDERSTORMS WERE MOVING TO THE EAST AT AROUND 25 MPH. THESE THUNDERSTORMS ARE CAPABLE OF PRODUCING STRONG GUSTY WIND...BRIEF HEAVY DOWNPOURS...DANGEROUS LIGHTNING...AND POSSIBLY SOME HAIL...AND RESIDENTS IN THE EFFECsTED AREAS SHOULD REMAIN ALERT TO RAPIDLY CHANGING WEATHER CONDITIONS.
Special weather statement, Jun 21, 10:06 AM CDT, 7 minutes before
ALZ004>007-011-181600- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BIRMINGHAM AL 1005 AM CDT THU JUN 21 1990 ...STRONG THUNDERSTORMS IN NORTH CENTRAL ALABAMA... AT 1003 AM NATIONAL WEATHER SERVICE RADAR INDICATED AN AREA OF SHOWERS AND THUNDERSTORMS IN NORTH CENTRAL ALABAMA...MOVING INTO ETOWAH COUNTY AND STRETCHING SOUTHWESTWARD INTO BLOUNT...CULLMAN...AND WALKER COUNTIES. THE STRONGEST STORMS AT THAT TIME WERE IN NORTHERN BLOUNT COUNTY JUST EAST OF BLOUNTSVILLE...IN SOUTHERN CULLMAN COUNTY NEAR SMITH DAM...AND IN SOUTHERN WALKER COUNTY NEAR OAKMAN. THESE THUNDERSTORMS ARE CAPABLE OF PRODUCING STRONG GUSTY WIND...BRIEF HEAVY DOWNPOURS...FREQUENT LIGHTNING...AND POSSIBLE SOME HAIL...AS THEY MOVE TO THE EAST AT AROUND 25 MPH. PERSONS IN THESE AREAS SHOULD REMAIN ALERT...AND STAYED TUNED FOR LATER STATEMENTS.
The office that day
Everything else NWS Birmingham, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 21, 11:17 AM CDT | Severe Thunderstorm Warning | BMX | St. Clair | 58 min |
| Jun 21, 12:55 PM CDT | Severe Thunderstorm Warning | BMX | Shelby | 35 min |
| Jun 21, 1:07 PM CDT | Severe Thunderstorm Warning | BMX | Cullman | 68 min |
| Jun 21, 1:28 PM CDT | Severe Thunderstorm Warning | BMX | Jefferson, Shelby | 47 min |
| Jun 21, 2:20 PM CDT | Severe Thunderstorm Warning | BMX | Lawrence | 55 min |
| Jun 21, 2:24 PM CDT | Severe Thunderstorm Warning | BMX | Shelby | 51 min |
| Jun 21, 3:23 PM CDT | Severe Thunderstorm Warning | BMX | Fayette, Walker | 67 min |
| Jun 21, 3:23 PM CDT | Severe Thunderstorm Warning | BMX | Tuscaloosa | 41 min |
| Jun 21, 4:55 PM CDT | Severe Thunderstorm Warning | BMX | Lamar | 35 min |
| Jun 21, 5:45 PM CDT | Severe Thunderstorm Warning | BMX | Franklin | 60 min |
Nearby
Severe Thunderstorm Warnings in Alabama, 1990Every severe thunderstorm warning in 1990
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.