Alert archive / Mississippi / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 202, NWS Jackson, MS
NWS Jackson, MS issued this severe thunderstorm warning at Aug 22, 1990, 6:50 PM CDT for Simpson County, Mississippi. It was in force for 25 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
- Aug 22, 1990, 6:50 PM CDT (23:50 UTC)
- Expired
- Aug 22, 1990, 7:15 PM CDT
- In force
- 25 min
- Issued by
- NWS Jackson, MS
- Area
- Whole counties
County Simpson County, MS
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 |
|---|---|---|---|
| Aug 22, 7:10 PM CDT | Thunderstorm Wind 0 | Simpson, MS |
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
Jackson, MS (KJAN), launched 12:00Z, 11.8 hours before the alert went out and 48 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
- 1598 J/kg
- Mixed-layer CIN
- -80 J/kg
- Mixed-layer LCL
- 1019 m above ground
- 0-6 km bulk shear
- 4 kt
- 0-1 km storm-relative helicity
- -2 m²/s²
- 0-3 km storm-relative helicity
- 16 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 KJAN 222352 SVRJAN MSC127-230015- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE JACKSON MS 650 PM CDT WED AUG 22 1990 THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 715 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN CENTRAL MISSISSIPPI ...SOUTHERN SIMPSON COUNTY AT 645 PM JACKSON RADAR SHOWED A SEVERE THUNDERSTORM IN SOUTHERN SIMPSON COUNTY. THIS STORM WAS MOVING SOUTH AT 10 TO 15 MPH. SEVERE THUNDERSTORMS PRODUCE WIND IN EXCESS OF 55 MPH...LARGE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. <
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, Aug 22, 2:38 PM CDT, 4 hours 12 minutes before
MSZ009-012-ALZ008-013-222145- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MERIDIAN MS 238 PM CDT WED AUG 22 1990 ...SEVERE THUNDERSTORM WATCH NUMBER 670 IS IN EFFECT UNTIL 800 PM FOR NEWTON...LAUDERDALE...JASPER...CLARKE...JONES AND WAYNE COUNTIES IN EAST CENTRAL MISSISSIPPI AND CHOCTAW COUNTY IN WEST CENTRAL ALABAMA... AT 230 PM CDT NATIONAL WEATHER SERVICE RADAR IN MERIDIAN INDICATED SCATTERED THUNDERSTORMS ALONG AND SOUTHWEST OF A LINE SELMA ALABAMA TO COLUMBUS TO GREENWOOD MISSISSIPPI. THE STRONGEST STORM WAS LOCATED IN NORTHERN CLARKE COUNTY. THE THUNDERSTORMS WERE MOVING SOUTHEAST AT 15 MPH. THESE THUNDERSTORMS WILL PRODUCE HEAVY DOWNPOURS...GUSTY WINDS...DEADLY L^IGHTNING AND HAIL. IF YOU ARE IN OR CLOSE TO THE WATCH AREA YOU SHOULD REMAIN WEATHER ALERT AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS.
Special weather statement, Aug 22, 3:45 PM CDT, 3 hours 5 minutes before
MSZ009-012-ALZ008-013-222230- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MERIDIAN MS 338 PM CDT WED AUG 22 1990 ...SEVERE THUNDERSTORM WATCH NUMBER 670 IS IN EFFECT UNTIL 800 PM INCLUDING NEWTON...LAUDERDALE...JASPER...CLARKE...JONES AND WAYNE COUNTIES IN EAST CENTRAL MISSISSIPPI AND CHOCTAW COUNTY IN WEST CENTRAL ALABAMA... AT 330 PM CDT NATIONAL WEATHER SERVICE RADAR IN MERIDIAN INDICATED SCATTERED THUNDERSTORMS ALONG AND SOUTHWEST OF A LINE MONTGOMERY ALABAMA TO MACON TO ROLLING FORK MISSISSIPPI. STRONGEST STORM WAS LOCATED IN CLARKE COUNTY BETWEEN PACHUTA AND QUITMAN. THE THUNDERSTORMS WERE MOVING SOUTHEAST AT 15 MPH. THESE THUNDERSTORMS WILL PRODUCE HEAVY DOWNPOURS...GUSTY WINDS...DEADLY LIGHTNING AND HAIL. IF YOU ARE IN OR CLOSE TO THE WATCH AREA YOU SHOULD REMAIN WEATHER ALERT AND LISTEN FOR LATER STATEMENTS.
Local storm report, Aug 22, 5:42 PM CDT, 1 hour 8 minutes before
LOCAL STORM REPORT NATIONAL WEATHER SERVICE MERIDIAN MS 540 PM CDT WED AUG 22 1990 ...505 PM CDT...JONES COUNTY CIVIL DEFENSE REPORTS TREES AND TREE LIMBS DOWN ONE MILE SOUTHEAST OF MOSELLE MISSISSIPPI 4IN JONES COUNTY.
Special weather statement, Aug 22, 5:48 PM CDT, 1 hour 2 minutes before
MSZ009-012-ALZ008-013-230000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MERIDIAN MS 545 PM CDT WED AUG 22 1990 ...SEVERE THUNDERSTORM WATCH NUMBER 670 IS NO LONGER IN EFFECT FOR NEWTON...LAUDERDALE...JASPER AND CLARKE COUNTIES IN EAST CENTRAL MISSISSIPPI AND CHOCTAW COUNTY IN WEST CENTRAL ALABAMA. THE WATCH CONTINUES UNTIL 800 PM FOR JONES AND WAYNE COUNTIES. AT 540 PM CDT NATIONAL WEATHER SERVICE RADAR IN MERIDIAN INDICATED SCATTERED ;THUNDERSTORMS ALONG AND SOUTHWEST OF A LINE FROM YAZOO CITY TO STATE LINE MISSISSIPPI. THE STRONGEST ACTIVITY WAS LOCATED OVER NORTHERN JONES COUNTY. THE THUNDERSTORMS WERE MOVING SOUTHEAST AT 10 MPH.
Special weather statement, Aug 22, 6:12 PM CDT, 38 minutes before
MSZ011-012-014-222330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE JACKSON MS 610 PM CDT WED AUG 22 1990 ...STRONG THUNDERSTORMS OVER SOUTH AND SOUTHEAST MISSISSIPPI.. AT 600PM...THUNDERSTORMS PRODUCING VERY HEAVY RAIN WERE LOCATED OVER SOUTHCENTRAL AND SOUTHEAST MISSISSIPPI. THE STRONGEST STORMS WERE LOCATED JUST NORTH OF COLUMBIA AND BETWEEN LAUREL AND HATTIESBURG. THE THUNDERSTORMS ARE MOVING SOUTH TO SOUTHEAST AT 10 TO 15 MPH AND WILL AFFECT COLUMBIA AND NORTHERN FORREST COUNTY DURING THE NEXT HOUR. PERSONS IN THESE AREAS CAN EXPECT GUSTY WINDS...HEAVY RAINFALL... FREQUENT LIGHTNING AND POSSIBLE HAIL. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR MUCH OF SOUTHEAST MISSKISSIPPI UNTIL 8 PM.
The office that day
Everything else NWS Jackson, MS issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 22, 4:28 PM CDT | Severe Thunderstorm Warning | JAN | Wayne | 32 min |
| Aug 22, 4:40 PM CDT | Severe Thunderstorm Warning | JAN | Jones | 35 min |
Nearby
Severe Thunderstorm Warnings in Mississippi, 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.