Alert archive / Florida / Flash Flood Warnings in 1995

Flash Flood Warning 4, NWS Jacksonville, FL

July 17, 1995Nassau County, Florida

NWS Jacksonville, FL issued this flash flood warning at Jul 17, 1995, 2:40 AM EDT for Nassau County, Florida. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued: Jul 17, 1995, 2:40 AM EDT (06:40 UTC)
Expired: Jul 17, 1995, 6:45 AM EDT
In force: 4 hr
Issued by: NWS Jacksonville, FL
Area: Whole counties

County Nassau County, FL

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 6.7 hours before the alert went out and 243 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 3143 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 1241 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: 54 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KJAX 170641
FFWJAX
FLC089-171045-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE JACKSONVILLE FL
240 AM EDT MON JUL 17 1995
 
THE NATIONAL WEATHER SERVICE IN JACKSONVILLE HAS ISSUED A
FLOOD WARNING EFFECTIVE UNTIL  645 AM EDT
FOR PERSONS IN THE FOLLOWING LOCATIONS ...
 
IN NORTH FLORIDA
 
   ...NASSAU COUNTY
 
AT 240 AM EDT DOPPLER RADAR INDICATED WIDESPREAD STRONG THUNDERSTORMS
NEARLY STATIONARY THAT WILL PRODUCE COPIOUS AMOUNTS OF RAINFALL THE NEXT
TWO HOURS. THESE STORMS WILL PRODUCE 2 TO 4 INCHES OF RAIN WHICH WILL
MAKE FLOODING OF STREETS AND ROADWAYS IMMINENT.
 
 
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY.  THE WATER DEPTH MAY BE TOO GREAHT 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, Jul 16, 10:55 PM EDT, 3 hours 45 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
1055 PM EDT SUN JUL 16 1995

TIME (EDT)   .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
DATE         ....COUNTY LOCATION....

530 PM       ST MARYS                GA     TREES DOWN IN DOWNTOWN AREA.
7/16/95      CAMDEN                         TREES ALSO DOWN ON GRAYFIELD
                                            DR...SEMINOLE RD. REPORTED
                             8               BY TV 12 METEOROLOGIST SPOTTER
                                            AND CAMDEN CO EMERG. 911.

PETERSON

Local storm report, Jul 17, 2:15 AM EDT, 25 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
215 AM EDT MON JUL 17 1995

TIME (EDT)   .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
DATE         ....COUNTY LOCATION....

0050AM       CAMP BLANDING           FL     WIND & HAIL
7/17/95      CLAY                           NUMEROUS TREES REPORTED DOWN
                                            POWER OUTAGES...GOLF BALL SIZE
                                            HAIL

K. KUYPER

WUUS01KPIT0

Local storm report, Jul 17, 2:35 AM EDT, 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
215 AM EDT MON JUL 17 1995

TIME (EDT)   .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
DATE         ....COUNTY LOCATION....

0050AM       CAMP BLANDING           FL     WIND & HAIL
7/17/95      CLAY                           NUMEROUS TREES REPORTED DOWN
                                            POWER OUTAGES...GOLF BALL SIZE
                                           & HAIL

K. KUYPER

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 17, 12:37 AM EDT	Severe Thunderstorm Warning	JAX	Clay	68 min
Jul 17, 12:57 AM EDT	Flash Flood Warning	JAX	Duval	4 hr
Jul 17, 2:33 AM EDT	Severe Thunderstorm Warning	JAX	Baker	57 min
Jul 17, 3:08 AM EDT	Severe Thunderstorm Warning	JAX	Duval, Nassau	67 min
Jul 17, 4:53 AM EDT	Flash Flood Warning	JAX	Duval, Nassau	4 hr
Jul 17, 5:37 AM EDT	Flash Flood Warning	JAX	Clay	3 hr

Nearby

Flash Flood Warnings in Florida, 1995 Every flash flood warning in 1995

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.