Alert archive / Florida / Flash Flood Warnings in 1999
Flash Flood Warning 7, NWS Miami, FL
NWS Miami, FL issued this flash flood warning at Sep 21, 1999, 3:00 AM EDT for Collier County, Florida. It was in force for 9 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Sep 21, 1999, 3:00 AM EDT (07:00 UTC)
- Expired
- Sep 21, 1999, 12:00 PM EDT
- In force
- 9 hr
- Issued by
- NWS Miami, FL
- Area
- Whole counties
County Collier County, FL
The nearest sounding before it
Miami, FL (KMFL), launched 00:00Z, 7.0 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
- 841 J/kg
- Mixed-layer CIN
- -5 J/kg
- Mixed-layer LCL
- 899 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 82 m²/s²
- 0-3 km storm-relative helicity
- 104 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 2.5
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMFL 210704 FFWMIA FLC021-211600- BULLETIN - EAS ACTIVATION REQUESTED FLOOD WARNING NATIONAL WEATHER SERVICE MIAMI FL 3 AM EDT TUE SEP 21 1999 THE NATIONAL WEATHER SERVICE IN MIAMI HAS EXTENDED A * FLOOD WARNING FOR... WESTERN COLLIER COUNTY IN SOUTHWESTERN FLORIDA * UNTIL 12 NOON EDT * AT 300 AM MIAMI DOPPLER RADAR INDICATED VERY HEAVY RAINFALL JUST OFFSHORE OF 2 TO 3 INCHES PER HOUR AND THIS WILL MOVE INTO WESTERN COLLIER COUNTY AFTER 4 AM. COLLIER COUNTY EMERGENCY MANAGEMENT REPORTED THAT MORE THAN FIVE INCHES OF RAINFALL HAS OCCURRED OVER WESTERN COLLIER COUNTY WITH MORE THAN EIGHT INCHES BEING OBSERVED AT EAST NAPLES MONDAY EVENING. ADDITIONAL RAINFALL OF 4 TO 6 INCHES WITH LOCALLY HIGHER AMOUNTS WILL OCCUR THROUGH THE MORNING. MANY ROADS IN THE AREA HAVE BEEN CLOSED. SEVERAL OTHER LOCATIONS ARE OPEN TO TRAVEL AND EITHER CONSIDERED FLOODED BUT PASSABLE OR HAZARDOUS FOR TRAVEL. MOTORISTS IN THIS AREA SHOULD AVOID TRAVEL IF AT ALL POSSIBLE. TRAVEL IS DANGEROUS IN THESE FLOODED AREAS. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY. MOVE TO HIGHER GROUND.
What forecasters said that day
The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Local storm report, Sep 20, 10:59 PM EDT, 4 hours 1 minute before
STORM REPORT
NATIONAL WEATHER SERVICE MIAMI, FL
1059 PM EDT MON SEP 20 1999
TIME(EDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0840 PM NAPLES MUNI ARPT FL FLOODING
09/20/99 COLLIER MORE THAN EIGHT INCHES OF
RAIN WITH SEVERAL ROAD
CLOSURES.The office that day
Everything else NWS Miami, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 20, 10:00 PM EDT | Flash Flood Warning | MFL | Collier | 5 hr |
| Sep 21, 4:50 AM EDT | Tornado Warning | MFL | Broward, Miami-Dade | 40 min |
| Sep 21, 5:27 AM EDT | Tornado Warning | MFL | Broward | 43 min |
| Sep 21, 5:59 AM EDT | Tornado Warning | MFL | Miami-Dade | 31 min |
Nearby
Flash Flood Warnings in Florida, 1999Every flash flood 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.