Alert archive / Alabama / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 180, NWS Mobile, AL
NWS Mobile, AL issued this severe thunderstorm warning at Sep 4, 1990, 5:03 PM CDT for Mobile County, Alabama. It was in force for 42 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
- Sep 4, 1990, 5:03 PM CDT (22:03 UTC)
- Expired
- Sep 4, 1990, 5:45 PM CDT
- In force
- 42 min
- Issued by
- NWS Mobile, AL
- Area
- Whole counties
County Mobile 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 |
|---|---|---|---|
| Sep 4, 5:10 PM CDT | Hail 0.75 | Mobile, AL | |
| Sep 4, 5:30 PM CDT | Thunderstorm Wind 70 | Mobile, 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
Slidell Radar S, LA (KSIL), launched 12:00Z, 10.1 hours before the alert went out and 152 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
- 1207 J/kg
- Mixed-layer CIN
- -92 J/kg
- Mixed-layer LCL
- 1245 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 75 m²/s²
- 0-3 km storm-relative helicity
- 80 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.5
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMOB 042205 SVRMOB ALC097-042245- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOBILE AL 503 PM CDT TUE SEP 4 1990 THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 545 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN SOUTHWEST ALABAMA ...SOUTHERN MOBILE COUNTY AT 500 PM...TWO SEVERE THUNDERSTORMS WERE LOCATED IN SOUTHERN MOBILE COUNTY. ONE WAS NEAR GRAND BAY AND THE OTHER WAS NEAR THEODORE. THE STORMS WERE MOVING SOUTHWEST AT 20 MPH. THEY WERE LIKELY PRODUCING HAIL AND STRONG GUSTY WINDS. SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
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, Sep 4, 3:28 PM CDT, 1 hour 35 minutes before
ALZ016-042200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MOBILE AL 325 PM CDT TUE SEP 4 1990 AT 325 PM A STRONG THUNDERSTORM WAS LOCATED 3 MILES NORTHEAST OF ORANGE BEACH. THIS THUNDERSTORM WAS MOVING SOUTHWEST AT 20 MPH. IT WILL BE MOVING OVER ORANGE BEACH AND GULF SHORES IN THE NEXT 1/2 HOUR. ANOTHER STRONG THUNDERSTORM WAS LOCATED 5 MILES NORTHEAST OF BAY MINETTE. IT WILL BE MOVING OVER BAY MINETTE IN THE NEAR 15 MINUTES. THESE STORMS ARE CAPABLE OF PRODUCING STRONG GUSTY WINDS...DANGEROUS LIGHTNING...HEAVY RAIN...AND POSSIBLY SOME SMALL HAIL.
Special weather statement, Sep 4, 3:37 PM CDT, 1 hour 26 minutes before
ALZ016-042200- SPECIAL WEATHER STATEMENT...CORRECTED TYPO IN SECOND PARAGRAPH NATIONAL WEATHER SERVICE MOBILE AL 335 PM CDT TUE SEP 4 1990 AT 325 PM A STRONG THUNDERSTORM WAS LOCATED 3 MILES NORTHEAST OF ORANGE BEACH. THIS THUNDERSTORM WAS MOVING SOUTHWEST AT 20 MPH. IT WILL BE MOVING OVER ORANGE BEACH AND GULF SHORES IN THE NEXT 1/2 HOUR. ANOTHER STRONG THUNDERSTORM WAS LOCATED 5 MILES NORTHEAST OF BAY MINETTE. IT WILL BE MOVING OVER BAY MINETTE IN THE NEXT 15 MINUTES. THESE STORMS ARE CAPABLE OF PRODUCING STRONG GUSTY WINDS...DANGEROUS LIGHTNING...HEAVY RAIN...AND POSSIBLY SOME SMALL HAIL.
The office that day
Everything else NWS Mobile, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 4, 4:53 PM CDT | Severe Thunderstorm Warning | MOB | Baldwin | 37 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.