Alert archive / Florida / Flash Flood Warnings in 1994

Flash Flood Warning 1, NWS Miami, FL

October 31, 1994Miami-Dade County, Florida

NWS Miami, FL issued this flash flood warning at Oct 31, 1994, 5:37 AM EST for Miami-Dade County, Florida. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Oct 31, 1994, 5:37 AM EST (10:37 UTC)
Expired
Oct 31, 1994, 9:45 AM EST
In force
4 hr
Issued by
NWS Miami, FL
Area
Whole counties

County Miami-Dade County, FL

The nearest sounding before it

Key West, FL (KEYW), launched 00:00Z, 10.6 hours before the alert went out and 169 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.

Skew-T log-pSkew-T log-p diagram, Key West, FL at 00:00Z on 1994-10-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2915 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Key West, FL at 00:00Z on 1994-10-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 34 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
2915 J/kg
Mixed-layer CIN
-7 J/kg
Mixed-layer LCL
708 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
34 m²/s²
0-3 km storm-relative helicity
39 m²/s²
Significant tornado parameter
0.5
Supercell composite
3.8

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KMIA 311037
FFWMIA
FLC025-311445-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MIAMI FL
537 AM EST MON OCT 31 1994
 
THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  945 AM EST
FOR PEOPLE IN THE FOLLOWING LOCATION......
 
IN SOUTHEAST FLORIDA
 
   ...EASTERN DADE COUNTY
 
...FLOODING OCCURRING OVER MUCH OF DADE...
 
FLOODING IS OCCURRING OVER A LARGE PORTION OF EASTERN DADE COUNTY.  THE
AREA WITH THE BIGGEST PROBLEMS EXTENDS FROM HIALEAH SOUTHWARD THROUGH
WESTCHESTER AND KENDALL.  NUMEROUS STREETS IN THESE AREAS WERE FLOODED
FROM HEAVY RAINS THAT ACCOMPANIED SOME THUNDERSTORMS THAT MOVED THROUGH
THE AREA EARLY THIS MORNING.  AT 524 AM RADAR INDICATED MODERATE TO
HEAVY RAINS WERE STILL OCCURRING FROM 10 MILES WEST OF SWEETWATER
THROUGH KENDALL...SWEETWATER AND INTO VIRGINIA GARDENS.  THIS RAIN WILL
CONTINUE UNTIL 7 TO 8 AM WHICH WILL MEAN LITTLE CHANGE IN THE FLOODING
UNTIL THAT TIME.
 
BY 4 AM THIS MORNING RAINFALL AMOUNTS OF FROM 2 TO 5 INCHES HAD BEEN
REPORTED BETWEEN THE AIRPORT AND MIAMI BEACH.  SINCE THAT TIME RADAR HAS
INDICATED THAT MUCH OF EASTERN DADE COULD HAVE RECEIVED SIMILAR AMOUNTS
OF RAIN.
 
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.
 
URBAN FLOODING IS OCCU8RRING IN THE FLOOD PRONE AREAS AND PEOPLE
SHOULD NOT DRIVE ACROSS RISING WATER ON STREETS AND UNDERPASSES.
 
 
 
&

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

Special weather statement, Oct 31, 1:12 AM EST, 4 hours 25 minutes before
FLZ071>074-310815-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
112 AM EST MON OCT 31 1994

...INTENSE THUNDERSTORMS IN WESTERN BROWARD AND NORTHWEST DADE...

A LARGE INTENSE THUNDERSTORM COVERED MUCH OF WESTERN BROWARD COUNTY AND
PART OF NORTHWEST DADE AT 103 AM.  THIS THUNDERSTORM WAS ABOUT 10 MILES
WEST OF PEMBROKE PINES AND 10 MILES NORTHWEST OF HIALEAH.  THE STORM
WAS MOVING EAST SOUTHEAST ABOUT 10 MPH.

IT SHOULD MOVE ACROSS HIGHWAY 27 SHORTLY AND INTO THE WESTERN SUBURBS
OF BROWARD COUNTY FROM TAMARAC SOUTH THROUGH MIRAMAR AND INTO HIALEAH
BETWEEN 2 AND 3 AM.

RESIDENTS CAN EXPECT WIND GUSTS TO 40 MPH...SMALL HAIL...FREQUENT
LIGHTNING AND HEAVY RAIN AS THESE STORMS PASS THROUGH SOUTHEAST
FLORIDA.

IF YOU ARE OUTDOORS...MOVE TO A PLACE OF SHELTER IMMEDIATELY IF A
STORM APPROACHES.  MOTORISTS SHOULD REMAIN ALERT FOR REDUCED
VISIBILITIES DURING DOWNPOURS OF RAIN.  STREETS MAY FLOOD QUICKLY.
Special weather statement, Oct 31, 1:13 AM EST, 4 hours 24 minutes before
FLZ071>074-310815-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
112 AM EST MON OCT 31 1994

...INTENSE THUNDERSTORMS IN WESTERN BROWARD AND NORTHWEST DADE...

A LARGE INTENSE THUNDERSTORM COVERED MUCH OF WESTERN BROWARD COUNTY AND
PART OF NORTHWEST DADE AT 103 AM.  THIS THUNDERSTORM WAS ABOUT 10 MILES
WEST OF PEMBROKE PINES AND 10 MILES NORTHWEST OF HIALEAH.  THE STORM
WAS MOVING EAST SOUTHEAST ABOUT 10 MPH.

IT SHOULD MOVE ACROSS HIGHWAY 27 SHORTLY AND INTO THE WESTERN SUBURBS
OF BROWARD COUNTY FROM TAMARAC SOUTH THROUGH MIRAMAR AND INTO HIALEAH
BETWEEN 2 AND 3 AM.

RESIDENTS CAN EXPECT WIND GUSTS TO 40 MPH...SMALL HAIL...FREQUENT
LIGHTNING AND HEAVY RAIN AS THESE STORMS PASS THROUGH SOUTHEAST
FLORIDA.

IF YOU ARE OUTDOORS...MOVE TO A PLACE OF SHELTER IMMEDIATELY IF A
STORM APPROACHES.  MOTORISTS SHOULD REMAIN ALERT FOR REDUCED
VISIBILITIES DURING DOWNPOURS OF RAIN.  STREETS MAY FLOOD QUICKLY.

The office that day

Everything else NWS Miami, FL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Oct 31, 1:41 AM ESTSevere Thunderstorm WarningMFLBroward64 min
Oct 31, 2:31 AM ESTSevere Thunderstorm WarningMFLBroward, Miami-Dade59 min
Oct 31, 3:13 AM ESTSevere Thunderstorm WarningMFLBroward37 min
Oct 31, 3:13 AM ESTSevere Thunderstorm WarningMFLMiami-Dade2 hr

Nearby

Flash Flood Warnings in Florida, 1994Every flash flood 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.