Alert archive / Alabama / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 100, NWS Birmingham, AL
NWS Birmingham, AL issued this severe thunderstorm warning at Jun 21, 1990, 1:28 PM CDT for Jefferson County, Shelby County, Alabama. It was in force for 47 min. 2 reports 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, 1:28 PM CDT (18:28 UTC)
- Expired
- Jun 21, 1990, 2:15 PM CDT
- In force
- 47 min
- Issued by
- NWS Birmingham, AL
- Area
- Whole counties
Counties Jefferson County, AL, Shelby 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, 1:55 PM CDT | Thunderstorm Wind 52 | Jefferson, AL | |
| Jun 21, 2:15 PM CDT | Thunderstorm Wind 50 | Jefferson, 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, 6.5 hours before the alert went out and 69 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
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 21, 9:22 AM CDT, 4 hours 6 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, 3 hours 22 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.
Local storm report, Jun 21, 12:20 PM CDT, 1 hour 8 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1218 PM CDT THU JUN 21 1989
1030 AM...NUMEROUS POWER OUTAGES IN THE TOWNS OF BLOUNTSVILLE AND
BROOKSVILLE (NORTH BLOUNTY COUNTY).
1035 AM...NUMEROUS FIRES CAUSED BY LIGHTNING REPORTED NEAR THE TOWN
OF SNEAD (NORTH BLOUNT COUNTY).
1035 AM...HOUSE DETROYED BY FIRE CAUSED BY LIGHTNING NEAR TOWN OF
SNEAD.
1058 AM...STRONG WINDS REPORTED NORTH OF BLOUNTSVILLE IN NORTHERN
x BLOUNT COUNTY BY INDIVIDUAL DRIVING INTO TOWN...NO
ESTIMATED WINDS GIVEN.The office that day
Everything else NWS Birmingham, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 21, 10:13 AM CDT | Severe Thunderstorm Warning | BMX | Blount | 62 min |
| 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, 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.