Alert archive / Mississippi / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 177, NWS Mobile, AL
NWS Mobile, AL issued this severe thunderstorm warning at Aug 30, 1990, 4:52 PM CDT for Pearl River County, Mississippi. It was in force for 38 min.
The area
The counties it named.
The facts
- Issued
- Aug 30, 1990, 4:52 PM CDT (21:52 UTC)
- Expired
- Aug 30, 1990, 5:30 PM CDT
- In force
- 38 min
- Issued by
- NWS Mobile, AL
- Area
- Whole counties
County Pearl River County, MS
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 9.9 hours before the alert went out and 59 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
- 2438 J/kg
- Mixed-layer CIN
- -67 J/kg
- Mixed-layer LCL
- 889 m above ground
- 0-6 km bulk shear
- 5 kt
- 0-1 km storm-relative helicity
- -7 m²/s²
- 0-3 km storm-relative helicity
- 6 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 KMOB 302152 SVRMOB MSC109-302230- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOBILE AL 452 PM CDT THU AUG 30 1990 THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 530 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN SOUTHEAST MISSISSIPPI ...PEARL.RIVER COUNTY AT 450 PM MOBILE RADAR INDICATED A SEVERE THUNDERSTORM NEAR LUMBERTON. THE STORM IS MOVING SOUTH AND WILL BE MOVING INTO THE NORTHEAST PORTION OF PEARL RIVER COUNTY IN THE NEXT FEW MINUTES. WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A STRONG BUILDING. DO NOT STAND BY WINDOWS. DON'T USE TELEPHONES OR ELECTRICAL APPLIQANCES 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, Aug 30, 2:35 PM CDT, 2 hours 17 minutes before
FLZ001>004-302030- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE PENSACOLA FL 230 PM CDT THU AUG 30 1990 A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR MOST OF NORTHWEST FLORIDA UNTIL 8 PM CDT. AT 225 PM CDT...THUNDERSTORMS WERE SCATTERED IN A 25 MILE WIDE AREA FROM THE FLORIDA PANHANDLE TO SOUTHEAST MISSISSIPPI. THE STORMS WERE OCCURRING FROM THE LAUREL...HATTIESBURG AREAS OF MISSISSIPPI...EAST AND SOUTHEAST ACROSS NORTHWEST FLORIDA TO NORTHERN BAY COUNTY. SEVERAL OF THESE THUNDERSTORMS INDICATED FREQUENT LIGHTNING...HAIL... GUSTY WINDS...AND VERY HEAVY RAIN. THE STRONGEST STORMS WERE PRESENTLY LOCATED IN BAY COUNTY NORTHWEST OF PANAMA CITY...AND IN ESCAMBIA COUNTY OF ALABAMA. MOVEMENTS WERE SOUTHEAST 20 TO 25 MPH.
Special weather statement, Aug 30, 3:19 PM CDT, 1 hour 33 minutes before
ALZ016-302115- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MOBILE AL 319 PM CDT THU AUG 30 1990 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 800 PM... ...A SEVERE THUNDERSTORM WARNING IS IN EFFECT UNTIL 330 PM FOR GREENE COUNTY... AT 305 PM...WIND GUSTS FROM 40 TO 50 MPH WERE OCCURRING IN THE MOBILE METRO AREA. THESE WINDS ARE CALLED GUST FRONTS OR OUTFLOW BOUNDARIES AND ARE THE RESULT OF STRONG DOWNDRAFTS FROM NEARBY THUNDERSTORMS. ALTHOUGH THEY ARE DANGEROUS...THEY ARE NOT ASSOCIATED WITH TORNADOS. PEOPLE IN THE MOBILE AREA SHOULD REMAIN IN THEIR HOMES OR SHELTERED AREAS UNTIL THE WINDS SUBSIDE. AN AREA OF THUNDERSTORMS WAS MOVING SOUTH THROUGH SOUTHERN ALABAMA. THESE STORMS HAVE PRODUCED HAIL IN COUNTIES NORTH OF MOBILE IN THE PAST SEVERAL HOURS AND WILL BE MOVING INTO THE MOBILE AREA IN THE NEXT HOUR. PEOPLE SHOULD CONTINUE TO MONITOR THE WEATHER THIS AFTERNOON UNTIL THE WWATCH EXPIRES.
Special weather statement, Aug 30, 3:37 PM CDT, 1 hour 15 minutes before
FLZ001>004-302030- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE PENSACOLA FL 330 PM CDT THU AUG 30 1990 A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR MOST OF NORTHWEST FLORIDA UNTIL 8 PM CDT. AT 325 PM CDT...STRONG THUNDERSTORMS WERE NUMEROUS IN A BAND...25 MILES WIDE...ACROSS THE GULF COAST. THE THUNDERSTORMS WERE IN CLUSTERS AND SHORT LINES FROM SOUTHEAST MISSISSIPPI...EASTWARD OVER ALABAMA AND NORTHWEST FLORIDA TO DE FUNIAK SPRINGS IN WALTON COUNTY. THESE THUNDERSTORMS HAVE A HISTORY OF SMALL HAIL...FREQUENT LIGHTNING ...GUSTY WINDS AND HEAVY RAIN. THE THUNDERSTORM BAND WAS MOVING SOUTHWARD TOWARD THE COASTLINE.
Local storm report, Aug 30, 4:28 PM CDT, 24 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE MOBILE AL
425 PM CDT THU AUG 30 1990
TIME CO/STATE EVENT
405 PM MOBILE/AL MOBILE EOC REPORTED TREES UPROOTED ON
BEN HAMILTO4N ROAD IN WEST MOBILE.Special weather statement, Aug 30, 4:31 PM CDT, 21 minutes before
FLZ001>004-302230- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE PENSACOLA FL 430 PM CDT THU AUG 30 1990 A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR MOST OF NORTHWEST FLORIDA UNTIL 8 PM CDT. AT 430 PM CDT...A BAND OF THUNDERSTORMS STRETCHED FROM DE FUNIAK SPRINGS SOUTHWEST TO FT WALTON BEACH AND CONTINUED WEST ALONG THE COAST THROUGH PENSACOLA...COASTAL ALABAMA TO PASCAGOULA. THE HEAVIEST RAIN WAS JUST NORTHEAST OF FT WALT8ON BEACH. SOME OF THESE THUNDERSTORMS MAY PRODUCE STRONG GUSTY WINDS...FREQUENT LIGHTNING AND POSSIBLE HAIL AS THEY MOVE SOUTHEAST AT 25 MILES AN HOUR.
Special weather statement, Aug 30, 4:45 PM CDT, 7 minutes before
ALZ016-MSZ013-302245- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MOBILE AL 444 PM CDT THU AUG 30 1990 SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 800 PM FOR SOUTHERN ALABAMA SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 900 PM FOR PORTIONS OF SOUTHEAST MISSISSIPPI AT 440 PM...A BAND OF STRONG THUNDERSTORMS WAS MOVING SOUTH THROUGH THE SOUTHERN PORTIONS OF BALDWIN AND MOBILE COUNTIES IN ALABAMA. IN MISSISSIPPI...THE BAND EXTENDED FROM JUST NORTH OF PASCAGOULA TO NEAR THE MCCOMB AREA. THE STORMS WERE MOVING SOUTH AT 10 MPH. THE WORST OF THE WEATHER IS OVER IN SOUTHERN ALABAMA EXCEPT FOR THE IMMEDIATE COAST AND IN THE COASTAL WATERS. IN MISSISSIPPI...THE STORMS ARE NOT AS STRONG AS THEY WERE EARLIER THIS AFTERNOON BUT THEY STILL HAVE THE POTENTIAL TO BE SEVERE. MARBLE SIZED HAIL WAS JUST REPORTED IN NORTHERN HARRISON COUNTY. PEOPLE IN SOUTHERN ALABAMA AND SOUTHERN MISSISSIPPI SHOULD CONTINUE TO MONITOR THE WEATHER TBHIS EVENING UNTIL THE SEVERE WEATHER MOVES THROUGH AND THE WATCHES HAVE EXPIRED.
The office that day
Everything else NWS Mobile, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 30, 2:42 PM CDT | Severe Thunderstorm Warning | MOB | Greene | 48 min |
| Aug 30, 5:22 PM CDT | Severe Thunderstorm Warning | MOB | Harrison | 38 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; the sounding from the Mesonet's radiosonde archive.