Alert archive / Florida / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 258, NWS Mobile, AL
NWS Mobile, AL issued this severe thunderstorm warning at Aug 19, 2000, 6:12 PM CDT for Okaloosa County, Florida. It was in force for 33 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.
The facts
- Issued
- Aug 19, 2000, 6:12 PM CDT (23:12 UTC)
- Expired
- Aug 19, 2000, 6:45 PM CDT
- In force
- 33 min
- Issued by
- NWS Mobile, AL
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Okaloosa County, FL
The nearest sounding before it
Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 11.2 hours before the alert went out and 205 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
- 1194 J/kg
- Mixed-layer CIN
- -133 J/kg
- Mixed-layer LCL
- 1282 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- -3 m²/s²
- 0-3 km storm-relative helicity
- 83 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS54 KMOB 192317 COR SVRMOB FLC091-192345- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING...CORRECTED MOVEMENT... NATIONAL WEATHER SERVICE MOBILE AL 612 PM CDT SAT AUG 19 2000 THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTH OKALOOSA COUNTY IN NORTHWEST FLORIDA * UNTIL 645 PM CDT * AT 612 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER SOUTHEAST OKALOOSA COUNTY...ABOUT 3 MILES NORTHEAST OF NICEVILLE. THE STORM WAS MOVING SOUTHEAST AT 7 MPH. SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THUEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN MOBILE. LAT...LON 3071 8639 3056 8654 3041 8639 3056 8639
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.
NWS Mobile, AL wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 19, 3:05 PM CDT, 3 hours 7 minutes earlier.
Area forecast discussion, Aug 19, 3:05 PM CDT, 3 hours 7 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MOBILE AL 305 PM CDT SAT AUG 19 2000 FAIRLY STRAIGHTFORWARD FORECAST AFTER LATE AFTERNOON/EARLY EVENING CONVECTION FIRING ALONG SURFACE FRONT SUBSIDES. MODELS SIMILAR IN IN LARGE SCALE FEATURES AS UPPER HIGH REMAIN ANCHORED OVER THE SOUTH CENTRAL PLAINS. AVN MODEL BRINGING FRONT FURTHEST TO THE SOUTH AND OFF THE COAST LATE TONIGHT. NOT MUCH CHANGE IN DEWPOINTS NOTED BEHIND FRONT. WILL LEAVE SCATTERED POPS (30%) ACROSS THE FL COASTAL COUNTIES THIS EVENING TO COVER ON GOING STORMS TO NORTH. WIDELY SCATTERED COASTAL ALABAMA COUNTIES. NO PRECIP EXPECTED SHORTLY AFTER SUNSET WITH MOSTLY CLEAR/PARTLY CLOUDY SKIES. PARTLY CLOUDY AGAIN ON SUNDAY WITH ONLY 20 PERCENT NEAR EXITING FRONT...COASTAL COUNTIES. ISOLATED AFTERNOON THUNDERSTORMS INLAND WITH DIURNAL HEATING AND MODERATE SURFACE DEWPOINTS. TEMPERATURE GUIDANCE SIMILAR NEXT FOUR PERIODS AND WILL NOT DEVIATE MUCH FROM THE GIVEN NUMBERS. WILL GO SLIGHTLY WARMER OVERNIGHT DUE TO SLOW MOVEMENT OF SURFACE FRONT. MARINE/FIRE WEATHER...MODERATE W WINDS WILL PREVAIL AHEAD OF FRONT PUSHING S THROUGH AL. WINDS WILL BECOME MORE NLY LATE TONIGHT AFTER FROPA. THEN BECOMING SWLY SUN AFTERNOON AS SEABREEZE BECOMES BETTER ESTABLISHED...AND MORE SLY ON MON. NO SIGNIFICANT WX. DESPITE FRONTAL PASSAGE TONIGHT...DEWPOINTS WILL REMAIN IN THE 65 TO 70 DEGREE RANGE THROUGH SUN AFTERNOON. THIS SHOULD KEEP THE LOWER RH VALUES ABOVE 40 PERCENT THROUGH THE PERIOD. /22 PRELIMINARY NUMBERS... MOB BB 072/095 072/094 073 2222- PNS BB 076/096 076/092 074 2232- DTS BB 078/095 077/091 074 2232- GZH BB 072/094 072/091 0:71 22010 2R0 BB 071/094 071/094 071 22010 61A BB 072/093 072/091 071 22010 .MOB... AL...NONE. FL...NONE. MS...NONE.
The office that day
Everything else NWS Mobile, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 19, 4:24 PM CDT | Severe Thunderstorm Warning | MOB | Escambia, Santa Rosa | 51 min |
| Aug 19, 6:44 PM CDT | Severe Thunderstorm Warning | MOB | Okaloosa | 31 min |
Nearby
Severe Thunderstorm Warnings in Florida, 2000Every severe thunderstorm warning in 2000
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.