Alert archive / Mississippi / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 331, NWS Jackson, MS
NWS Jackson, MS issued this severe thunderstorm warning at Apr 25, 1999, 3:39 PM CDT for Forrest County, Mississippi. It was in force for 46 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Apr 25, 1999, 3:39 PM CDT (20:39 UTC)
- Expired
- Apr 25, 1999, 4:25 PM CDT
- In force
- 46 min
- Issued by
- NWS Jackson, MS
- Area
- Whole counties
County Forrest County, MS
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 8.7 hours before the alert went out and 113 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
- 961 J/kg
- Mixed-layer CIN
- -132 J/kg
- Mixed-layer LCL
- 814 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- 7 m²/s²
- 0-3 km storm-relative helicity
- -48 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
999 WUUS1 KJAN 252040 RRA SVRJAN MSC035-252125- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE JACKSON MS 339 PM CDT SUN APR 25 1999 THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHWESTERN AND SOUTHERN FORREST COUNTY IN SOUTHEASTERN MISSISSIPPI * UNTIL 425 PM CDT * AT 339 PM CDT... RADAR INDICATED A RAPIDLY DEVELOPING SEVERE THUNDERSTORM 23 MILES SOUTH OF HATTIESBURG... MOVING NORTHWEST AT 25 MPH. THIS STORM WILL MAINLY AFFECT SMALLER COMMUNITIES AND RURAL AREAS. DAMAGING WINDS AND HEAVY RAIN ARE LIKELY. GO INSIDE A STURDY BUILDING AND STAY AWAY FROM WINDOWS 66
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, Apr 25, 10:00 AM CDT, 5 hours 39 minutes before
ARZ074-075-LAZ007>009-015-016-023>026-MSZ018-019-025>066-072>074- 270400- AREA THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE JACKSON MS 10 AM CDT MON APR 25 1999 VERY MOIST AND UNSTABLE AIR WILL REMAIN OVER THE LOWER MISSISSIPPI RIVER VALLEY THROUGH TONIGHT. A STRONG COLD FRONT STRETCING NORTH-SOUTH ACROSS CENTRAL TEXAS WILL MOVE RAPIDLY EAST TODAY AND TONIGHT. SHOWERS AND THUNDERSTORMS WILL DEVELOP AHEAD OF THIS FRONT AND THE THREAT EXISTS FOR SOME THUNDERSTORMS TO BECOME SEVERE LATE THIS AFTERNOON AND EVENING. DAMAGING WIND...FREQUENT LIGHTNING...AND PERIODS HEAVY RAIN... AND LARGE HAIL ARE POSSIBLE WITH THE SEVERE STORMS. ACTIVATION OF STORM SPOTTERS...HAM RADIO OPERATORS AND CIVIL DEFENSE/ EMERGENCY MANAGEMENT PERSONNEL MAY BE REQUIRED THROUGH TONIGHT. FOR MORE INFORMATION...PLEASE VISIT OUR WORLD WIDE WEBSITE ON THE INTERNET AT - HTTP://WWW.JANNWS.STATE.MS.US
Special weather statement, Apr 25, 10:25 AM CDT, 5 hours 14 minutes before
ARZ074-075-LAZ007>009-015-016-023>026-MSZ018-019-025>066-072>074- 260400- AREA THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE JACKSON MS 1025 AM CDT SUN APR 24 1999 VERY MOIST AND UNSTABLE AIR WILL REMAIN OVER THE LOWER MISSISSIPPI RIVER VALLEY THROUGH MONDAY. A FRONTAL BOUNDARY...STRETCHING EAST-WEST ACROSS SOUTHERN ARKANSAS AND NORTHERN MISSISSIPPI...WILL DRIFT NORTH AS A WARM FRONT TODAY. AN UPPER-LEVEL LOW PRESSURE SYSTEM...WITH ITS ASSOCIATED SURFACE COLD FRONT...WILL SHIFT EAST ACROSS THE SOUTHERN PLAINS THROUGH MONDAY. AIDED BY DIURNAL HEATING...SHOWERS AND THUNDERSTORMS WILL DEVELOP IN THE UNSTABLE AIRMASS OVER THE LOWER MISSISSIPPI RIVER VALLEY. SMALL HAIL... GUSTY WINDS...FREQUENT LIGHTNING...AND BRIEF HEAVY RAIN MAY OCCUR IN ANY STRONGER STORMS. HOWEVER...NO WIDESPREAD SEVERE WEATHER IS EXPECTED THROUGH TONIGHT. ACTIVATION OF STORM SPOTTERS...HAM RADIO OPERATORS AND CIVIL DEFENSE/ SHOULD NOT BE REQUIRED THROUGH TONIGHTv. HOWEVER...EMERGENCY MANAGEMENT PERSONNEL AND SPOTTERS SHOULD BE ALERT FOR ANY RAPIDLY CHANGING OR THREATENING WEATHER CONDITIONS. FOR MORE INFORMATION...PLEASE VISIT OUR WORLD WIDE WEBSITE ON THE INTERNET AT - HTTP://WWW.JANNWS.STATE.MS.US
The office that day
Everything else NWS Jackson, MS issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 24, 7:08 PM CDT | Severe Thunderstorm Warning | JAN | Clarke | 47 min |
| Apr 24, 7:45 PM CDT | Severe Thunderstorm Warning | JAN | Jasper | 50 min |
| Apr 24, 7:48 PM CDT | Severe Thunderstorm Warning | JAN | Newton | 32 min |
| Apr 24, 8:05 PM CDT | Severe Thunderstorm Warning | JAN | Jones | 50 min |
| Apr 25, 4:01 PM CDT | Severe Thunderstorm Warning | JAN | Copiah | 64 min |
| Apr 25, 4:55 PM CDT | Severe Thunderstorm Warning | JAN | Lamar | 30 min |
| Apr 25, 5:15 PM CDT | Severe Thunderstorm Warning | JAN | Hinds | 35 min |
| Apr 25, 6:11 PM CDT | Severe Thunderstorm Warning | JAN | Copiah | 34 min |
Nearby
Severe Thunderstorm Warnings in Mississippi, 1999Every severe thunderstorm warning in 1999
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.