Alert archive / Mississippi / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 112, NWS Jackson, MS
NWS Jackson, MS issued this severe thunderstorm warning at May 20, 1990, 5:49 PM CDT for Amite County, Pike County, Mississippi. It was in force for 26 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 20, 1990, 5:49 PM CDT (22:49 UTC)
- Expired
- May 20, 1990, 6:15 PM CDT
- In force
- 26 min
- Issued by
- NWS Jackson, MS
- Area
- Whole counties
Counties Amite County, MS, Pike 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 |
|---|---|---|---|
| May 20, 6:05 PM CDT | Thunderstorm Wind 0 | Pike, 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
Slidell Radar S, LA (KSIL), launched 12:00Z, 10.8 hours before the alert went out and 134 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
- 2025 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 600 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 102 m²/s²
- 0-3 km storm-relative helicity
- 164 m²/s²
- Significant tornado parameter
- 0.8
- Supercell composite
- 4.4
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KJAN 202250 SVRJAN MSC077-147-005-113-202315- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE JACKSON MS 549 PM CDT SUN MAY 20 1990 THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 615 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN SOUTH CENTRAL MISSISSIPPI ...LAWRENCE COUNTY...WALTHALL COUNTY IN SOUTHWEST MISSISSIPPI ...EASTERN AMITE COUNTY...PIKE COUNTY AT 545 PM CDT...RADAR INDICATED SEVERE THUNDERSTRORMS JUST NORTH OF THE MCCOMB AREA. MCCOMB REPORTED WINDS OF 50 MPH IN NORTH MCCOMB AT 540 PM. THESE STORMS WERE MOVING TO THE EAST AT 45 MPH. SEVERE THUNDERSTORMS PRODUCE WINDF 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, May 20, 3:31 PM CDT, 2 hours 18 minutes before
MSZALL-202135- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE JACKSON MS 325 PM CDT SUN MAY 20 1990 ...SEVERE THUNDERSTORM WATCH UNTIL 9 PM FOR MUCH OF MISSISSIPPI... AT 325 PM...A LINE OF STRONG THUNDERSTORMS WAS BEGINNING TO MOVE INTO NORTHWEST MISSISSIPPI JUST SOUTH OF GREENVILLE. THIS LINE EXTENDS SOUTHWESTWARD INTO CENTRAL LOUISIANA...AND IS MOVING SLOWLY TOWARD THE EAST. THE STRONGEST STORMS IN THE LINE ARE IN WASHINGTON COUNTY NEAR HOLLANDALE. GOLF BALL SIZE HAIL WAS REPORTED JUST WEST OF THE MISSISSIPPI RIVER WHEN THESE STORMS PASSED THROUGH SOUTHEASTERN ARKANSAS...SO PEOPLE JUST SOUTH OF GREENVILLE SHOULD BE PREPARED TO MOVE TO A SAFE PLACE IF THREATENING WEATHER APPROACHES. OTHER SHOWERS AND WEAKER THUNDERSTORMS ARE SCATTERED OVER WEST AND EXTREME EAST MISSISSIPPI.
Special weather statement, May 20, 4:30 PM CDT, 1 hour 19 minutes before
MSZ009-012-ALZ008-013- - SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MERIDIAN MS 420 PM CDT SUN MAY 20 1990 ...SEVERE THUNDERSTORM WATCH NUMBER 281 IS IN EFFECT FOR ALL OF EAST CENTRAL MISSISSIPPI UNTIL 900 PM CDT... ...SEVERE THUNDERSTORM WATCH NUMBER 285 IS IN EFFECT FOR SUMTER AND CHOCTAW COUNTIES IN EXTREME WEST CENTRAL ALABAMA UNTIL 1000 PM CDT... AT 415 PM CDT MERIDIAN WEATHER SERVICE RADAR SHOWED SCATTERED VERY STRONG THUNDERSTORMS ALONG AND NORTH OF A LINE FROM BELZONI TO WINONA TO TUSCALOOSA ALABAMA. ALSO THERE WERE ISOLATED SHOWERS AND THUNDERSHOWERS IN THE CENTRAL AREAS OF MISSISSIPPI. THE PREgHUNDERSTORMS ARE EXPECTED TO DEVELOP ACROSS BOTH EAST CENTAL MISSISSIPPI AND EXTREME WEST CENTRAL ALABAMA IN THE NEXT HOUR. ALL IN THESE AREAS SHOULD CONTINUE TO BE WEATHER ALERT FOR THE NEXT SEVERAL HOURS.
Special weather statement, May 20, 4:44 PM CDT, 1 hour 5 minutes before
MSZALL-202235- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE JACKSON MS 440 PM CDT SUN MAY 20 1990 ...SEVERE THUNDERSTORM WATCH UNTIL 9 PM FOR MUCH OF MISSISSIPPI... AT 430 PM...A LINE OF STRONG THUNDERSTORMS EXTENDED FROM GREENWOOD TO PORT GIBSON. STRONG THUNDERSTORMS WERE ALSO LOCATED OVER EAST CENTRAL MISSISSIPPI IN LAUDERDALE COUNTY. OTHER THUNDERSTORMS AND PATCHES OF LIGHT RAIN WERE SCATTERED OVER MISSISSIPPI. w MOVEMENT WAS EAST AT 45 MILES AN HOUR.
Special weather statement, May 20, 5:35 PM CDT, 14 minutes before
MSZALL-202235- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE JACKSON MS 535 PM CDT SUN MAY 20 1990 ...SEVERE THUNDERSTORM WATCH UNTIL 9 PM FOR MUCH OF MISSISSIPPI... AT 530 PM...A LINE OF STRONG THUNDERSTORMS EXTENDED FROM TUPELO THROUGH JACKSON TO MCCOMB. ANOTHER LINE OF STRONG THUNDERSTORMS ALSO EXTENDED FROM MERIDIAN TO HATTIESBURG. PERSONS IN MISSISSIPPI SHOULD BE ALERT TO RAPIDLY CHANGING WEATHER CONDITIONS IN THE =APPROACH OF THESE THUNDERSTORMS. MOVEMENT WAS EAST AT 45 MILES AN HOUR.
The office that day
Everything else NWS Jackson, MS issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 20, 2:49 PM CDT | Severe Thunderstorm Warning | JAN | Washington | 41 min |
| May 20, 3:47 PM CDT | Severe Thunderstorm Warning | JAN | Issaquena, Sharkey, Washington | 58 min |
| May 20, 4:20 PM CDT | Severe Thunderstorm Warning | JAN | Carroll, Montgomery | 25 min |
| May 20, 4:23 PM CDT | Severe Thunderstorm Warning | JAN | Holmes, Yazoo | 37 min |
| May 20, 4:34 PM CDT | Severe Thunderstorm Warning | JAN | Claiborne, Warren | 26 min |
| May 20, 4:34 PM CDT | Severe Thunderstorm Warning | JAN | Lauderdale | 26 min |
| May 20, 4:45 PM CDT | Severe Thunderstorm Warning | JAN | Calhoun, Grenada, Webster | 30 min |
| May 20, 4:58 PM CDT | Severe Thunderstorm Warning | JAN | Hinds, Madison | 32 min |
| May 20, 5:03 PM CDT | Severe Thunderstorm Warning | JAN | Attala, Montgomery | 27 min |
| May 20, 5:11 PM CDT | Severe Thunderstorm Warning | JAN | Rankin | 34 min |
| May 20, 5:49 PM CDT | Severe Thunderstorm Warning | JAN | Lawrence, Walthall | 26 min |
| May 20, 6:03 PM CDT | Severe Thunderstorm Warning | JAN | Covington | 27 min |
| May 20, 6:07 PM CDT | Severe Thunderstorm Warning | JAN | Jones | 53 min |
| May 20, 6:10 PM CDT | Severe Thunderstorm Warning | JAN | Jefferson Davis | 35 min |
| May 20, 6:43 PM CDT | Severe Thunderstorm Warning | JAN | Covington | 32 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.