Alert archive / Florida / Flash Flood Warnings in 1998

Flash Flood Warning 2, NWS Melbourne, FL

February 23, 1998Volusia County, Florida

NWS Melbourne, FL issued this flash flood warning at Feb 23, 1998, 12:21 AM EST for Volusia County, Florida. It was in force for 3 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 23, 1998, 12:21 AM EST (05:21 UTC)
Expired
Feb 23, 1998, 3:30 AM EST
In force
3 hr
Issued by
NWS Melbourne, FL
Area
Whole counties

County Volusia County, FL

The radar

The Melbourne radar (KMLB), 116 km from the middle of the area, began a volume at 05:20 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 00:00Z, 5.4 hours before the alert went out and 168 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 00:00Z on 1998-02-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Jacksonville, FL at 00:00Z on 1998-02-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -91 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
778 m above ground
0-6 km bulk shear
62 kt
0-1 km storm-relative helicity
-91 m²/s²
0-3 km storm-relative helicity
87 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 KMLB 230522
FFWMLB
FLC127-230830-

BULLETIN - EAS ACTIVATION REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
1221 AM EST MON FEB 23 1998

THE NATIONAL WEATHER SERVICE IN MELBOURNE FL HAS ISSUED A
FLOOD WARNING EFFECTIVE UNTIL 330 AM EST
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN EAST CENTRAL FLORIDA

   ...VOLUSIA COUNTY
 
AT 1220 AM...REPORTS OF FLOODING WERE RECEIVED FROM VOLUSIA COUNTY
NEAR THE INTERSECTION OF HIGHWAYS 17 AND 92 NEAR ORANGE CITY AND
DELAND.  ADDITIONAL THUNDERSTORMS WILL BE MOVING NORTHEAST ALONG THE
INTERSTATE 4 CORRIDOR AND PRODUCING ANOTHER 1-2 INCHES OF RAINFALL.
THIS WILL LIKELY CAUSE ADDITIONAL FLOODING TO AROUND DAYTONA
BEACH AND PORT ORANGE.
 
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE
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.

LASCODY

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 22, 9:45 PM ESTTornado WarningMLBLake65 min
Feb 22, 10:22 PM ESTTornado WarningMLBVolusia53 min
Feb 22, 11:20 PM ESTTornado WarningMLBVolusia45 min
Feb 22, 11:27 PM ESTTornado WarningMLBLake63 min
Feb 22, 11:37 PM ESTTornado WarningMLBOrange63 min
Feb 22, 11:56 PM ESTTornado WarningMLBSeminole59 min
Feb 23, 12:14 AM ESTTornado WarningMLBVolusia61 min
Feb 23, 12:22 AM ESTTornado WarningMLBOsceola58 min
Feb 23, 12:40 AM ESTFlash Flood WarningMLBOrange, Seminole3 hr
Feb 23, 12:40 AM ESTTornado WarningMLBOrange45 min
Feb 23, 1:19 AM ESTTornado WarningMLBOrange, Osceola61 min
Feb 23, 1:23 AM ESTTornado WarningMLBBrevard62 min
Feb 23, 2:27 AM ESTTornado WarningMLBBrevard48 min
Feb 23, 3:04 AM ESTTornado WarningMLBOsceola56 min
Feb 23, 3:16 AM ESTTornado WarningMLBBrevard59 min

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.