Alert archive / Alabama / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 124, NWS Jackson, MS
NWS Jackson, MS issued this severe thunderstorm warning at May 21, 1990, 11:26 AM CDT for Sumter County, Alabama. It was in force for 34 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
- May 21, 1990, 11:26 AM CDT (16:26 UTC)
- Expired
- May 21, 1990, 12:00 PM CDT
- In force
- 34 min
- Issued by
- NWS Jackson, MS
- Area
- Whole counties
County Sumter 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 |
|---|---|---|---|
| May 21, 11:45 AM CDT | Thunderstorm Wind 0 | Sumter, 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, 4.4 hours before the alert went out and 100 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
- 173 J/kg
- Mixed-layer CIN
- -336 J/kg
- Mixed-layer LCL
- 1194 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 141 m²/s²
- 0-3 km storm-relative helicity
- 149 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMEI 211627 SVRMEI ALC119-211700- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MERIDIAN MS 1126 AM CDT MON MAY 21 1990 THE NATIONAL WEATHER SERVICE IN MERIDIAN HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL NOON CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN WEST CENTRAL ALABAMA ...NORTHERN SUMTER COUNTY AT 1124 AM CDT MERIDIAN RADAR INDICATED A SEVERE THUNDERSTORM 25 MILES NORTHWEST OF LIVINGSTON ALABAMA MOVING EAST AT 35 MPH. IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A STRONG BUILDING. DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN... AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS. STAY IlNSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.
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, May 21, 8:51 AM CDT, 2 hours 35 minutes before
MSZALL-211500- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE JACKSON MS 851 AM CDT MON MAY 21 1990 AT 845 AM CDT...RADAR INDICATED A STRONG THUNDERSTORM NEAR LEXINGTON. THIS STORM IS SEVERE AND WILL PRODUCE LARGE HAIL AND STRONG GUSTY WINDS. IT IS MOVING EAST NORTHEAST AT 35 MILES AN HOUR;. A LINE OF STRONG THUNDERSTORMS CONTINUE ACROSS NORTH MISSISSIPPI. THE LEADING EDGE OF THIS LINE EXTENDED FROM CALHOUN CITY TO GREENWOOD TO HOLLENDALE. THE LINE IS MOVING SOUTHEAST. STRONG GUSTY WINDS MAY OCCUR NEAR THE LEADING EDGE OF THE LINE.
Special weather statement, May 21, 9:25 AM CDT, 2 hours 1 minute before
MSZALL-211530- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE JACKSON MS 924 AM CDT MON MAY 21 1990 ...SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR NORTH AND CENTRAL MISSISSIPPI UNTIL 100 PM CDT... AT 915 AM CDT...THE LEADING EDGE OF A LINE OF STRONG THUNDERSTORMS EXTENDED FROM COLUMBUS TO ACKERMAN TO ROLLING FORK. THE INTENSITY OF THE STORMS HAS DECREASED SLIGHTLY DURING THE PAST 15 MINUTES AND THE SEVERE THUNDERSTORM WARNING HAS EXPIRED FOR HOLMES COUNTY. AT 850 AM...MARBLE SIZE HAIL WAS REPORTED IN NORTHEAST HOLMES COUNTY ALONG WITH GUSTY WINDS OF UNDETERMINED SPEED. ALTHOUGH THE STORMS HAVE DECREASED IN INTENSITY...THEY MAY REINTENSIFY LATER. AT 915 AM...THE STRONGEST OF THE STORMS WAS INDICATED BETWEEN AND SILVER CITY AND LEXINGTON. THE STORM IS MOVING EAST AT 35 MILES AN HOUR...BUT THE ENTIRE LINE IS MOVING SOUTHEAST.
Special weather statement, May 21, 10:11 AM CDT, 1 hour 15 minutes before
MSZ009-012-ALZ008-013-211600- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MERIDIAN MS 1005 AM CDT MON MAY 21 1990 THE SEVERE THUNDERSTORM WARNINGS FOR WINSTON AND NOXUBEE COUNTIES IN EAST CENTRAL MISSISSIPPI HAVE EXPIRED AND ARE NO LONGER IN EFFECT. SEVERE THUNDERSTORM WATCH NUMBER 292 IN EFFECT UNTIL 100 PM CDT AND SEVERE THUNDERSTORM WATCH NUMBER 293 IN EFFECT UNTIL 200 PM CDT. AT 10 AM CDT MERIDIAN RADAR INDICATED A LINE OF STRONG THUNDERSTORMS WITH VERY HEAVY RAIN EXTENDED FROM TUSCALOOSA ALABAMA WESTWARD TO MACON TO YAZOO CITY MISSISSIPPI. THE LINE WAS MOVING SLOWLY SOUTHEAST AS THE INDIVIDUAL THUNDERSTORMS MOVED EAST AT 35 MPH. COVERAGE AND INTENSITY CHANGED LITTLE DURING T.HE PAST HOUR. SEVERAL REPORTS OF VERY HEAVY RAIN ASSOCIATED WITH THE LINE OF THUNDERSTORMS HAVE BEEN RECEIVED. AS THE LINE IS MOVING VERY SLOW... IF THUNDERSTORMS CONTINUE TO DEVELOPE ALONG THE LINE FLASH FLOODING COULD OCCUR. <<
Special weather statement, May 21, 10:57 AM CDT, 29 minutes before
MSZALL-211700- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE JACKSON MS 1055 AM CDT MON MAY 21 1990 ...SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR PARTS OF NORTH AND MUCH OF CENTRAL MISSISSIPPI UNTIL 100 PM CDT... AT 1045 AM CDT...A LINE OF THUNDERSTORMS ACROSS CENTRAL MISSISSISSIPPI FROM LOUISVILLE TO CARTHAGE TO JACKSON TO VICKSBURG. HAIL AND HEAVY RAIN ARE POSSIBLE ALONG THIS LINE. A WIND GUST LINE HAS DEVELOPED AHEAD OF THE THUNDERSTORM LINE. IT EXTENDS FROM MACON TO BRANDON TO SOUTH OF VICKSBURG. WIND GUSTS NEAR 50 MILES AN HOUR ARE POSSIBLE ALMOST ANYWHERE ALONG THIS GUST LINE. DURING THE PAST HOUR...WIND GUSTS NEAR 50 MILES AN HOUR HAVE BEEN REPORTED AT THE ROSS BARNETT RESERVOIR NORTHEAST OF JACKSON. THE LINE OF THUNDERSTORMS IS MOVING SOUTHEAST AROUND 30 MILES AN HOUR AND THE GUST LINE IS PROBABLY MOVING AROUND THE SAME SPEED. THE INDIVIDUAL STORMS ARE MOVING EAST AROUND 35 MI LES AN HOUR.
Local storm report, May 21, 11:18 AM CDT, 8 minutes before
STORM REPORTS
NATIONAL WEATHER SERVICE JACKSON MS
1115 AM CDT MON MAY 21 1990
A PARTIAL LIST OF STORM REPORTS RECEIVED BY NWS JACKSON. MORE WILL
PROBABLY FOLLOW LATER.
845 AM...NUMEROUS TREES DOWN WEST OF LEXINGTON. (MP&L)
850 AM...MARBLE SIZE HAIL NORTHEAST OF LEXINGTON. (SPOTTER)
900 AM...VERY HEAVY RAIN AT WEST. (SPOTTER)
1045 AM...WIND GUSTS NEAR 50 MPH AT ROSS BARNETT RESERVOIR NORTHEAST
OF JACKSON.
1050 AM...WIND GUFSTS NEAR 40 MPH AT HAWKINS FIELD IN JACKSON.
1055 AM...WIND GUSTS NEAR 40 MPH AT THOMPSON FIELD IN JACKSON.Local storm report, May 21, 11:20 AM CDT, 6 minutes before
STORM REPORTS
NATIONAL WEATHER SERVICE JACKSON MS
1115 AM CDT MON MAY 21 1990
A PARTIAL LIST OF STORM REPORTS RECEIVED BY NWS JACKSON. MORE WILL
PROBABLY FOLLOW LATER.
845 AM...NUMEROUS TREES DOWN WEST OF LEXINGTON. (MP&L)
850 AM...MARBLE SIZE HAIL NORTHEAST OF LEXINGTON. (SPOTTER)
900 AM...VERY HEAVY RAIN AT WEST. (SPOTTER)
1045 AM...WIND GUSTS NEAR 50 MPH AT ROSS BARNETT RESERVOIR NORTHEAST
OF JACKSON.
1050 AM...WINLD GUSTS NEAR 40 MPH AT HAWKINS FIELD IN JACKSON.
1055 AM...WIND GUSTS NEAR 40 MPH AT THOMPSON FIELD IN JACKSON.
<
1045 AM...TREES DOWN NEAR CARTHAGE.
1115 AM...PEA SIZE HAIL IN JACKSON.The office that day
Everything else NWS Jackson, MS issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 21, 12:52 PM CDT | Severe Thunderstorm Warning | JAN | Choctaw | 53 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.