Alert archive / Mississippi / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 129, NWS Jackson, MS
NWS Jackson, MS issued this severe thunderstorm warning at May 21, 1990, 1:02 PM CDT for Jasper County, Mississippi. It was in force for 43 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, 1:02 PM CDT (18:02 UTC)
- Expired
- May 21, 1990, 1:45 PM CDT
- In force
- 43 min
- Issued by
- NWS Jackson, MS
- Area
- Whole counties
County Jasper 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 21, 1:07 PM CDT | Thunderstorm Wind 0 | Jasper, 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, 6.0 hours before the alert went out and 96 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
- 2059 J/kg
- Mixed-layer CIN
- -34 J/kg
- Mixed-layer LCL
- 558 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 114 m²/s²
- 0-3 km storm-relative helicity
- 78 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.4
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMEI 211803 SVRMEI MSC061-211845- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MERIDIAN MS 102 PM CDT MON MAY 21 1990 THE NATIONAL WEATHER SERVICE IN MERIDIAN HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 145 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN EAST CENTRAL MISSISSIPPI ...JASPER COUNTY AT 102 PM CDT MERIDIAN WEATHER RADAR INDICATED A SEVERE THUNDERSTORM 2 MILES WEST OF BAY SPRINGS MISSISSIPPI MOVING EAST AT 35 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.
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, 10:57 AM CDT, 2 hours 5 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, 1 hour 44 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, 1 hour 42 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.Local storm report, May 21, 11:41 AM CDT, 1 hour 21 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MERIDIAN MS
1135 AM CDT MON MAY 21 1990
1134 AM CDT...NESHOBA COUNTY C. D. REPORTED NICKEL SIZE HAIL
2 MILES SOUTHEAST OF PHILADELPHIA IN NESHOBA
COUNTY MISSISSIPPI.Special weather statement, May 21, 12:04 PM CDT, 58 minutes before
MSZALL-211800- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE JACKSON MS 1203 PM CDT MON MAY 21 1990 ...SEVERE THUNDERSTORM WATCH IN EFFECT FOR PARTS OF CENTRAL AND SOUTH MISSISSIPPI UNTIL 500 PM... AT NOON...A LINE OF STRONG THUNDERSTORMS CONTINUES ACROSS CENTRAL MISSISSIPPI FROM SOUTH OF DEKALB TO FORREST TO FLORENCE AND TO THE MISSISSIPPI RIVER NORTHWEST OF PORT GIBSON. THE HEAVIEST STORMS ALONG THIS LINE WERE LOCATED JUST ACROSS THE RIVER FROM PORT GIBSON...AND WILL BE MOVING INTO PORT GIBSON BEFORE 1230 PM. THESE STORMS MAY PRODUCE HAIL AND VERY HEAVY RAIN IN A SHORT PERIOD OF TIME. A WIND GUST LINE CONTINUES ROUGHLY 10 TO 15 MILES AHEAD OF THE THUNDERSTORM LINE. WIND GUSTS AROUND 50 MILES AN HOUR ARE POSSIBLE ALMOST ANYWHERE AHEAD OF THIS LINE. BOTH THE THUNDERSTORM LINE AND THE WIND GUST LINE ARE MOVING SOUTHEAST AROUND 25 TO 30 MILES AN HOUR. THE INDIVIDUAL THUNDERSTORMS ARE MOVING EAST AT 35 TO 40 MILES AN HOUR.
Special weather statement, May 21, 12:33 PM CDT, 29 minutes before
MSZALL-211800- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE JACKSON MS 1230 PM CDT MON MAY 21 1990 ...SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR PARTS OF CENTRAL AND SOUTH MISSISSIPPI UNTIL 500 PM... AT 1230 PM...A LINE OF STRONG THUNDERSTORMS CONTINUES ACROSS CENTRAL MISSISSIPPI FROM NEWTON TO CRYSTAL SPRINGS TO PORT GIBSON. THE HEAVIEST STORM WAS INDICATED NEAR HERMANVILLE. THIS STORM PROBABLY CONTAINS LARGE HAIL. IT ANOTHER STRONG STORM WAS INDICATED NEAR MAGEE. A WIND GUST LINE CONTINUES ROUGHLY 10 TO 15 MILES AHEAD OF THE THUNDERSTORM LINE. WIND GUSTS AROUND 50 MILES AN HOUR ARE POSSIBLE ALMOST ANYWHERE AHEAD OF THIS LINE. BOTH THE THUNDERSTORM LINE AND THE WIND GUST LINE ARE MOVING SOUTHEAST AROUND 25 TO 30 MILES AN HOUR. THE INDIVIDUAL THUNDERSTORMS ARE MOVING EAST AT 35 TO 40 MILES AN HOUR.
The office that day
Everything else NWS Jackson, MS issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 21, 7:55 AM CDT | Severe Thunderstorm Warning | JAN | Leflore | 50 min |
| May 21, 8:21 AM CDT | Severe Thunderstorm Warning | JAN | Winston | 54 min |
| May 21, 8:29 AM CDT | Severe Thunderstorm Warning | JAN | Holmes | 31 min |
| May 21, 8:51 AM CDT | Severe Thunderstorm Warning | JAN | Noxubee | 54 min |
| May 21, 10:29 AM CDT | Severe Thunderstorm Warning | JAN | Winston | 46 min |
| May 21, 10:40 AM CDT | Severe Thunderstorm Warning | JAN | Noxubee | 65 min |
| May 21, 10:52 AM CDT | Severe Thunderstorm Warning | JAN | Neshoba | 68 min |
| May 21, 11:52 AM CDT | Severe Thunderstorm Warning | JAN | Newton | 53 min |
| May 21, 12:10 PM CDT | Severe Thunderstorm Warning | JAN | Lauderdale | 50 min |
| May 21, 12:15 PM CDT | Severe Thunderstorm Warning | JAN | Claiborne | 45 min |
| May 21, 1:08 PM CDT | Severe Thunderstorm Warning | JAN | Lincoln | 37 min |
| May 21, 2:19 PM CDT | Severe Thunderstorm Warning | JAN | Wayne | 26 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.