Alert archive / Florida / Severe Thunderstorm Warnings in 1994
Severe Thunderstorm Warning 9, NWS Miami, FL
NWS Miami, FL issued this severe thunderstorm warning at Apr 18, 1994, 5:32 PM EDT for Collier County, Florida. It was in force for 58 min.
The area
The counties it named.
The facts
- Issued
- Apr 18, 1994, 5:32 PM EDT (21:32 UTC)
- Expired
- Apr 18, 1994, 6:30 PM EDT
- In force
- 58 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, 9.5 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
- 866 J/kg
- Mixed-layer CIN
- -5 J/kg
- Mixed-layer LCL
- 770 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- -16 m²/s²
- 0-3 km storm-relative helicity
- 9 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMIA 182128 SVRMIA FLC021-182230- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MIAMI FL 532 PM EDT MON APR 18 1994 THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 630 PM EDT FOR PEOPLE IN THE FOLLOWING LOCATION...... IN SOUTHWEST FLORIDA ...NORTH CENTRAL COLLIER COUNTY AT 520 PM MIAMI DOPPLER WEATHER RADAR DETECTED A POSSIBLE SEVERE THUNDERSTORM OVER NORTHERN COLLIER COUNTY ABOUT MIDWAY BETWEEN BONITA SPRINGS AND SUNNILAND. THIS THUNDERSTORM WAS MOVING VERY LITTLE. STRONG THUNDERSTORM ACTIVITY WILL CONTINUE TO DEVELOP ACROSS PARTS OF COLLIER COUNTY DURING THE NEXT COUPLE OF HOURS AND PEOPLE IN THIS AREA SHOULD REMAIN ALERT FOR THREATENING WEATHER. IF THREATENING WEATHER IS SIGHTED...TAKE SHELTER...THEN CALL THE LOCAL NATIONAL WEATHER SERVICE OFFICE AT 305 666-0884 OR REPORT THE SEVERE WEATHER TO YOUR NEAREST LAW ENFORCEMENT AGENCY.\
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 18, 3:40 PM EDT, 1 hour 52 minutes before
FLZ067-182040-
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE WEST PALM BEACH FL
340 PM EDT MON APR 18 1994
...STRONG THUNDERSTORMS OVER WESTERN PALM BEACH COUNTY...
AT 335 PM EDT NATIONAL WEATHER SERVICE RADAR INDICATED CLUSTERS OF
STRONG THUNDERSTORMS OVER SOUTHWESTERN AND WESTERN PALM BEACH COUNTY
FROM 5 MILES EAST OF CANAL POINT SOUTH TO 15 MILES SOUTH OF SOUTH BAY.
THESE THUNDERSTORMS SHOWED LITTLE MOVEMENT DURING THE LAST HOUR.
THESE THUNDERSTORMS MAY PRODUCE STRONG GUSTY WINDS...FREQUENT DANGEROUS
CLOUD TO GROUND LIGHTNING STRIKES...REDUCED VISIBILITIES IN HEAVY
DOWNPOURS ALONG WITH THE PONDING OF WATER ON ROADWAYS.
RESIDENTS OF WESTERN AND CENTRAL PALM BEACH COUNTY AS WELL AS BOATERS
OPERATING ON LAKE OKEECHOBEE SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER FOR THE NEXT ONE TO TWO HOURS. IF THREATENING WEATHER APPROACHES
YOUR LOCATION SEEK A SAFE SHELTER OR HARBOR IMMEDIATELY.
THESE THUNDERSTORMS WERE PART OF AN AREA OF SCATTERED SHOWERS AND
THUNDERSTORMS THAT WERE OVER THE SOUTHERN PENINSULA SOUTH AND EAST
OF A LINE FROM COCOA BEACH TO SARASOTA. OTHER SHOWERS AND THUNDERSTORMS
SOME WITH VERY HEAVY RAIN CONTINUED OVER THE ATLANTIC WATERS FROM THE
GRAND BAHAMA ISLAND NORTH TO WALKERS CAY.
LITTLE MOVEMENT WAS OBSERVED.
NNNNThe office that day
Everything else NWS Miami, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 18, 4:21 PM EDT | Severe Thunderstorm Warning | MFL | Hendry | 69 min |
Nearby
Severe Thunderstorm Warnings in Florida, 1994Every severe thunderstorm warning in 1994
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.