Alert archive / Florida / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 2, NWS Miami, FL
NWS Miami, FL issued this severe thunderstorm warning at Mar 3, 1991, 12:20 PM EST for Collier County, Florida. It was in force for 55 min.
The area
The counties it named.
The facts
- Issued
- Mar 3, 1991, 12:20 PM EST (17:20 UTC)
- Expired
- Mar 3, 1991, 1:15 PM EST
- In force
- 55 min
- Issued by
- NWS Miami, FL
- Area
- Whole counties
County Collier County, FL
The nearest sounding before it
Key West, FL (KEYW), launched 12:00Z, 5.3 hours before the alert went out and 174 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
- 690 J/kg
- Mixed-layer CIN
- -44 J/kg
- Mixed-layer LCL
- 683 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 142 m²/s²
- 0-3 km storm-relative helicity
- 119 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 3.2
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMIA 031737 COR SVRMIA FLC043-051-021-031815- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING...CORRECTION NATIONAL WEATHER SERVICE MIAMI FL 1220 PM EST SUN MAR 3 1991 THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 115 PM EST FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN SOUTH FLORIDA ...GLADES COUNTY...HENDRY COUNTY IN SOUTHWEST FLORIDA ...NORTHWESTERN COLLIER COUNTY AT 1215 EST WEATHER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS FROM NEAR FORT MYERS TO JUST NORTH OF LAKE OKEECHOBEE. THE LINE WAS MOVING SOUTHEAST AT 25 MPH WHILE INDIVIDUAL CELLS WERE MOVING NORTHEAST AT 45 MPH. DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...AND DEADLY LIGHTNING ARE ALL POSSIBLE IN A SEVERE THUNDERSTORM. SEEK SHELTER IN A STRONG BUILDING. STAY AWAY FROM WINDOWS. DO NOT USE TELEPHONES OR ELECTRICAL APPLIANCES. A MOBILE HOME IS NOT A SAFE REFUGE FROM A SEVERE THUNDERSTORM...MOVE TO A MORE SUBSTANTIAL BUILDING. A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. REMEMBER... SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OF NO ADVANCE WARNING. IF THREATENING WEATHER IS SIGHTED...TAKE SHELTER...THEN ASK A LAW ENFORCEMENT AGENCY TO RELAY YOUR SEVERE WEATHER REPORT TO THE LOCAL NATIONAL WEATHER SERVICE OFFICE.
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, Mar 3, 10:18 AM EST, 2 hours 2 minutes before
FLZ017-022-032115- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MIAMI FL 1015 AM EST SUN MAR 03 1991 ...VERY STRONG WINDS CONTINUING OVER FLORIDA TODAY... A HIGH WIND WARNING IS IN EFFECT OVER THE SOUTH AND SOUTH CENTRAL FLORIDA PENINSULA FOR THE REMAINDER OF TODAY. A TORNADO WATCH IS IN EFFECT UNTIL NOON FOR PORTIONS OF SOUTH CENTRAL FLORIDA. A STRONG LOW PRESSURE CENTER OVER NORTH FLORIDA IS MOVING SLOWLY EAST CAUSING VERY STRONG SOUTH TO SOUTHWEST WINDS. SUSTAINED WINDS OF 30 TO 40 MPH WITH GUSTS TO NEAR 50 MPH ARE BEING REPORTED ACROSS SOUTH AND SOUTH CENTRAL FLORIDA. THESE STRONG WINDS MAY CAUSE LIMBS...WEAK TREES AND POWER LINES TO BE BROKEN OR BLOWN DOWN. MOTORISTS...ESPBECIALLY THOSE IN HIGH PROFILE VEHICLES...SHOULD REDUCE SPEEDS IN OPEN AREAS AS STRONG WIND GUSTS COULD CAUSE LOSS OF CONTROL.
Special weather statement, Mar 3, 10:21 AM EST, 1 hour 59 minutes before
FLZ016>022-032115- SPECIAL WEATHER STATEMENT...CORRECTED FOR DISSEMINATION HEADER NATIONAL WEATHER SERVICE MIAMI FL 1015 AM EST SUN MAR 03 1991 ...VERY STRONG WINDS CONTINUING OVER FLORIDA TODAY... A HIGH WIND WARNING IS IN EFFECT OVER THE SOUTH AND SOUTH CENTRAL FLORIDA PENINSULA FOR THE REMAINDER OF TODAY. A TORNADO WATCH IS IN EFFECT UNTIL NOON FOR PORTIONS OF SOUTH CENTRAL FLORIDA. A STRONG LOW PRESSURE CENTER OVER NORTH FLORIDA IS MOVING SLOWLY EAST CAUSING VERY STRONG SOUTH TO SOUTHWEST WINDS. SUSTAINED WINDS OF 30 TO 40 MPH WITH GUSTS TO NEAR 50 MPH ARE BEING REPORTED ACROSS SOUTH AND SOUTH CENTRAL FLORIDA. THESE STRONG WINDS MAY CAUSE LIMBS...WEAK TREES AND POWER LINES TO DBE BROKEN OR BLOWN DOWN. MOTORISTS...ESPECIALLY THOSE IN HIGH PROFILE VEHICLES...SHOULD REDUCE SPEEDS IN OPEN AREAS AS STRONG WIND GUSTS COULD CAUSE LOSS OF CONTROL.
Special weather statement, Mar 3, 10:24 AM EST, 1 hour 56 minutes before
FLC020-016-031715- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WEST PALM BEACH FL 1017 AM EST SUN MAR 03 1991 ...STRONG THUNDERSTORMS ARE MOVING INTO CENTRAL FLORIDA... ...A TORNADO WATCH CONTINUES IN EFFECT FOR PALM BEACH...MARTIN... AND ST LUCIE COUNTIES AND THE ADJACENT COASTAL WATERS UNTIL NOON EST TODAY... AT 1010 AM EST WEATHER SERVICE RADAR INDICATED THE LEADING EDGE OF RAIN SHOWERS AND THUNDERSTORMS HAD REACHED A LINE FROM DAYTONA BEACH SOUTHWESTWARD TO SARASOTA. THE STRONGEST STORMS APPEARED TO BE LOCATED NEAR SARASOTA. THIS AREA OF STORMY WEATHER IS SPREADING RAPIDLY EASTWARD INTO CENTRAL AND SOUTHERN FLORIDA AND WILL LIKELY REACH THE LAKE OKEECHOBEE AREA BY NOON TODAY. RESIDENTS SHOULD REMAIN ALERT TO THIS DEVELOPING WEATHER SITUATION AND BE READY TO MOVE TO SAFETY IF THREATENING WEATHER APPROACHES. X NNNN
The office that day
Everything else NWS Miami, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 3, 12:20 PM EST | Severe Thunderstorm Warning | MFL | Glades, Hendry | 55 min |
| Mar 3, 1:14 PM EST | Severe Thunderstorm Warning | MFL | Glades, Hendry | 61 min |
| Mar 3, 3:30 PM EST | Severe Thunderstorm Warning | MFL | Broward, Miami-Dade | 2 hr |
| Mar 3, 5:31 PM EST | Severe Thunderstorm Warning | MFL | Miami-Dade | 59 min |
Nearby
Severe Thunderstorm Warnings in Florida, 1991Every severe thunderstorm warning in 1991
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.