Alert archive / Florida / Flash Flood Warnings in 2002

Flash Flood Warning 7, NWS Jacksonville, FL

September 24, 2002Putnam County, Florida

NWS Jacksonville, FL issued this flash flood warning at Sep 24, 2002, 7:40 PM EDT for Putnam County, Florida. It was in force for 110 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Sep 24, 2002, 7:40 PM EDT (23:40 UTC)
Expired: Sep 24, 2002, 9:30 PM EDT
In force: 110 min
Issued by: NWS Jacksonville, FL
Area: Counties, with a storm outline in the text

County Putnam County, FL

The nearest sounding before it

Jacksonville, FL (KJAX), launched 12:00Z, 11.7 hours before the alert went out and 101 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: 1828 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 473 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: -17 m²/s²
0-3 km storm-relative helicity: 34 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 
WGUS52 KJAX 242340
FFWJAX
FLC107-250130-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE JACKSONVILLE FL
734 PM EDT TUE SEP 24 2002

THE NATIONAL WEATHER SERVICE IN JACKSONVILLE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WESTERN PUTNAM COUNTY IN NORTHEAST FLORIDA

* UNTIL 930 PM EDT

* AT 729 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  VERY HEAVY SHOWERS AND A FEW THUNDERSTORMS FROM CITRA TO CRESCENT 
  CITY. THIS ACTIVITY IS MOVING NORTH AT 10 MPH AND WILL MOVE ACROSS
  AREAS OF WESTERN PUTNAM COUNTY WHICH HAVE ALREADY RECEIVED OVER 3 
  TO 5 INCHES OF RAIN. A LARGE AREA OF MODERATE RAIN WILL CONTINUE
  TO MOVE OVER THE AREA AFTER THE HEAVIEST SHOWERS SHIFT NORTH. 
  ADDITIONAL RAINFALL AMOUNTS OF 1 TO 3 INCHES ARE LIKELY FROM 
  JOHNSON TO INTERLACHEN. 

* EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE RAPID FLOODING
  OF SMALL CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND
  ALONG THE BANKS OF CREEKS AND STREAMS.

* BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE
  THE DANGERS OF ROAD AND STREAM FLOODING. DRIVE VERY CAUTIOUSLY.
  DO NOT CROSS FLOODED ROADS AND IF FLOODING IS OBSERVED ACT QUICKLY.

* MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS
  BRIDGES...DIPS...OR OTHER LOW SPOTS IF WATER COVERS THE ROADWAY.
  NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.

REPORT FLOODING TO THE NEAREST LAW ENFORCEMENT AGENCY OR YOUR COUNTY
EMERGENCY MANAGEMENT...OR YOU CAN ALSO CALL THE NATIONAL WEATHER
SERVICE IN JACKSONVILLE DIRECTLY AT 904-741-4370 TO REPORT FLOODING.

LAT...LON 2975 8177 2937 8169 2953 8186 2949 8205
          2972 8203
$$

CARROLL

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 24, 4:26 PM EDT	Tornado Warning	JAX	Putnam	34 min
Sep 24, 5:40 PM EDT	Flash Flood Warning	JAX	Putnam	110 min
Sep 24, 6:24 PM EDT	Flash Flood Warning	JAX	Duval	2 hr

Nearby

Flash Flood Warnings in Florida, 2002 Every flash flood warning in 2002

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.