Alert archive / Florida / Flash Flood Warnings in 1998

Flash Flood Warning 13, NWS Jacksonville, FL

February 17, 19984 counties in Florida

NWS Jacksonville, FL issued this flash flood warning at Feb 17, 1998, 4:15 PM EST for 4 counties in Florida. It was in force for 6 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
Feb 17, 1998, 4:15 PM EST (21:15 UTC)
Expired
Feb 17, 1998, 10:00 PM EST
In force
6 hr
Issued by
NWS Jacksonville, FL
Area
Whole counties

Counties Columbia County, FL, Gilchrist County, FL, Hamilton County, FL, Suwannee County, FL

The radar

The Moody AFB radar (KVAX), 83 km from the middle of the area, began a volume at 21:18 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Jacksonville, FL (KJAX), launched 12:00Z, 9.3 hours before the alert went out and 116 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, Jacksonville, FL at 12:00Z on 1998-02-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 170 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Jacksonville, FL at 12:00Z on 1998-02-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 201 square meters per square second.1939587897Sfc1 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
170 J/kg
Mixed-layer CIN
-128 J/kg
Mixed-layer LCL
830 m above ground
0-6 km bulk shear
79 kt
0-1 km storm-relative helicity
201 m²/s²
0-3 km storm-relative helicity
217 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KJAX 172117
FFWJAX
FLC001-003-007-019-023-031-035-041-047-089-107-109-121-125-180300-

BULLETIN
FLOOD WARNING...UPDATE TO ADD HAMILTON COUNTY...
NATIONAL WEATHER SERVICE JACKSONVILLE FL
415 PM EST TUE FEB 17 1998

THE NATIONAL WEATHER SERVICE IN JACKSONVILLE FL HAS ISSUED A FLOOD
WARNING EFFECTIVE UNTIL 10 PM EST FOR PEOPLE IN THE FOLLOWING COUNTIES
IN NORTH FLORIDA...

ALACHUA...BAKER...BRADFORD...CLAY...COLUMBIA...DUVAL...FLAGLER...HAMILTON
GILCHRIST...MARION...NASSAU...PUTNAM...ST JOHNS...SUWANNEE...UNION

A FLOOD WARNING MEANS THAT FLOODING IS CONTINUING OR IS
IMMINENT. DUE TO EXTENSIVE RAINFALL...GREATER THAN 3 INCHES AND AS MUCH
AS 7 INCHES OVERNIGHT...WIDESPREAD FLOODING CONTINUES IN NORTH
FLORIDA DUE TO EXISTING SATURATED GROUND. WIDESPREAD ROAD
DAMAGE EXISTS...LOCALLY IMPASSIBLE ROADS AND PONDING OF WATER ON ROADS
IS CONTINUING EVEN AFTER THE RAIN HAS STOPPED.  RESIDENTS ARE ADVISED TO
KEEP ABREST OF THEIR LOCAL SITUATION OVER THE NEXT SEVERAL DAYS AS
SURFACE WATER SLOWLY DRAINS INTO THE ALREADY FLOODING RIVER SYSTEMS OF
NORTH FLORIDA AND SOUTHEAST GEORGIA.

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. ALL MOTORISTS ARE WARNED NOT
TO ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS THE
ROADWAY.  BE PARTICULARLY CAUTIOUS TODAY AS ACTUAL ROAD DAMAGE EXISTS
IN NEARLY EVERY NORTH FLORIDA COUNTY. SPECIFICALLY ROAD DAMAGE REPORTS
HAVE BEEN RECEIVED FROM BRADFORD...PUTNAM...SUWANNEE...FLAGLER...
ALACHUA...AND GILCHRIST COUNTIES.

NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT. TO
ESCAPE RISING WATER MOVE UP TO HIGHER GROUND.  KEEP CHILDREN CLEAR OF
ALL FLOODED AREAS AND FLOWING WATER.  ALL CREEKS AND STREAMS IN NORTH
FLORIDA AND SOUTHEAST GEORGIA SHOULD BE CONSIDERED DANGEROUS.

REPORTS BY COUNTY...
...ALACHUA...OLD BELLAMY ROAD CLOSED...TURKEY CREEK DEVELOPMENT HAS
SEVERAL HOMES FLOODED...SOME SMALL BRIDGES ARE WASHED OUT.
...BRADFORD...ROAD DAMAGE...65 SECONDARY AND DIRT ROADS IMPASSABLE.
...BAKER...ST MARYS RIVER RISING RAPIDLY AND WILL CREST NEAR 18-19 FEET.
ROAD FLOODING AND IMPASSIBLE DIRT ROADS.
...CLAY...BLACK CREEK IS NOW AT FLOOD STAGE AND EXPECTED TO CREST
TOMORROW AT 23 FEET...ABOVE THE APRIL 1997 FLOOD. ROADS FLOODED.
...COLUMBIA...32 ROADS DAMAGED 2 HOMES FLOODED.
...DUVAL...FLOODING ALONG WILLS BRANCH WITH UP TO 5 FEET IN SOME
AREAS... WIDESPREAD LOCALIZED STREET FLOODING CONTINUES.
...FLAGLER...WIDESPREAD CROP AND FIELD FLOODING WITH DEAD AND CRESCENT
LAKES OVERFLOWING.
...GILCHRIST...ROAD FLOODING ALONG ROUTE 337S AND 232 AND OTHERS.
...HAMILTON...NEAR WHITE SPRINGS US 41 UNDERCUT AND SEVERAL LOCAL ROADS
UNDER WATER OR DAMAGED.  SEVERAL HOMES THREATENED BY FLOODING.
...MARION...NICHOLAS POND FILLED TO OVERFLOWING AND MAY LATER ENDANGER
NICHOLAS ESTATES AREA...NUMEROUS ROADS FLOODED.
...PUTNAM...CROP AND ROAD FLOODING AND CREEKS OVERFLOWING.
...ST JOHNS...EXTENSIVE CROP AND FIELD FLOODING.
...SUWANNEE...HOMES THREATENED IN SEVERAL AREAS.
...UNION...WIDESPREAD PONDING AND FLOODING...STATE ROADS NOW CLEAR...
AVOID SECONDARY AND DIRT ROADS IF AT ALL POSSIBLE.

PLEASE TUNE TO YOUR LOCAL RADIO OR TELEVISION STATIONS... YOUR CABLE
TELEVISION OUTLET... OR NOAA WEATHER RADIO TO STAY UP TO DATE WITH THIS
FLOODING IN YOUR AREA.

WELSH/KUYPER

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 16, 7:47 PM ESTTornado WarningJAXAlachua43 min
Feb 16, 8:06 PM ESTSevere Thunderstorm WarningJAXUnion29 min
Feb 16, 8:18 PM ESTSevere Thunderstorm WarningJAXBaker42 min
Feb 16, 8:31 PM ESTSevere Thunderstorm WarningJAXNassau44 min
Feb 16, 8:55 PM ESTSevere Thunderstorm WarningJAXSuwannee45 min
Feb 16, 9:23 PM ESTSevere Thunderstorm WarningJAXColumbia, Hamilton42 min
Feb 16, 10:57 PM ESTSevere Thunderstorm WarningJAXColumbia, Hamilton, Suwannee48 min
Feb 16, 11:32 PM ESTSevere Thunderstorm WarningJAXBaker48 min
Feb 16, 11:52 PM ESTSevere Thunderstorm WarningJAXNassau48 min
Feb 17, 12:38 AM ESTSevere Thunderstorm WarningJAXColumbia, Gilchrist, Suwannee32 min
Feb 17, 12:54 AM ESTSevere Thunderstorm WarningJAXBaker, Union31 min
Feb 17, 1:18 AM ESTSevere Thunderstorm WarningJAXDuval, Nassau47 min
Feb 17, 8:16 AM ESTFlash Flood WarningJAXColumbia, Hamilton, Suwannee6 hr
Feb 17, 8:16 AM ESTFlash Flood WarningJAXBaker, Duval, Nassau6 hr
Feb 17, 8:16 AM ESTFlash Flood WarningJAXUnion6 hr
Feb 17, 8:16 AM ESTFlash Flood WarningJAXClay6 hr
Feb 17, 2:25 PM ESTFlash Flood WarningJAXAlachua, Columbia, Gilchrist, Hamilton, Suwannee, Union6 hr
Feb 17, 2:25 PM ESTFlash Flood WarningJAXBradford, Clay, Flagler, Putnam, Saint Johns6 hr
Feb 17, 2:25 PM ESTFlash Flood WarningJAXBaker, Duval, Nassau6 hr
Feb 17, 4:15 PM ESTFlash Flood WarningJAXBaker, Clay, Duval, Nassau, Saint Johns6 hr
Feb 17, 4:15 PM ESTFlash Flood WarningJAXAlachua, Bradford, Putnam, Union6 hr
Feb 17, 4:15 PM ESTFlash Flood WarningJAXFlagler6 hr

Nearby

Flash Flood Warnings in Florida, 1998Every flash flood warning in 1998

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; radar from the NEXRAD Level II archive.