Alert archive / Alabama / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 71, NWS Mobile, AL
NWS Mobile, AL issued this severe thunderstorm warning at Apr 1, 1990, 4:21 PM CDT for Coosa County, Tallapoosa County, Alabama. It was in force for 69 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
- Apr 1, 1990, 4:21 PM CDT (21:21 UTC)
- Expired
- Apr 1, 1990, 5:30 PM CDT
- In force
- 69 min
- Issued by
- NWS Mobile, AL
- Area
- Whole counties
Counties Coosa County, AL, Tallapoosa 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 |
|---|---|---|---|
| Apr 1, 4:30 PM CDT | Hail 0.75 | Coosa, 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, 9.4 hours before the alert went out and 110 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
- 667 J/kg
- Mixed-layer CIN
- -72 J/kg
- Mixed-layer LCL
- 840 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 25 m²/s²
- 0-3 km storm-relative helicity
- 20 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMGM 012121 SVRMGM ALC037-123-012230- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MONTGOMERY AL 421 PM CDT SUN APR 1 1990 THE NATIONAL WEATHER SERVICE IN MONTGOMERY HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 530 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN SOUTH ALABAMA ...COOSA COUNTY...TALLAPOOSA COUNTY AT 420 PM CDT RADAR INDICATED SEVERE THUNDERSTORMS OVER NORTHERN AND WESTERN COOSA COUNTY...AND NORTHERN TALLAPOOSA COUNTY. MOVEMENT WAS SOUTHEAST AT AROUND 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.
The office that day
Everything else NWS Mobile, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 1, 4:10 PM CDT | Severe Thunderstorm Warning | MOB | Clarke | 50 min |
| Apr 1, 4:18 PM CDT | Severe Thunderstorm Warning | MOB | Dallas, Wilcox | 57 min |
| Apr 1, 4:54 PM CDT | Severe Thunderstorm Warning | MOB | Autauga, Lowndes | 66 min |
| Apr 1, 4:54 PM CDT | Severe Thunderstorm Warning | MOB | Monroe | 66 min |
| Apr 1, 5:21 PM CDT | Severe Thunderstorm Warning | MOB | Elmore, Montgomery | 2 hr |
| Apr 1, 5:31 PM CDT | Severe Thunderstorm Warning | MOB | Crenshaw | 59 min |
| Apr 1, 5:32 PM CDT | Severe Thunderstorm Warning | MOB | Conecuh, Escambia | 43 min |
| Apr 1, 5:52 PM CDT | Severe Thunderstorm Warning | MOB | Butler, Covington | 68 min |
| Apr 1, 6:03 PM CDT | Severe Thunderstorm Warning | MOB | Bullock, Pike | 57 min |
| Apr 1, 6:25 PM CDT | Severe Thunderstorm Warning | MOB | Coffee | 65 min |
| Apr 1, 6:25 PM CDT | Severe Thunderstorm Warning | MOB | Macon | 65 min |
| Apr 1, 6:41 PM CDT | Severe Thunderstorm Warning | MOB | Barbour, Dale | 64 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.