Alert archive / Florida / Flash Flood Warnings in 1990

Flash Flood Warning 7, NWS Tallahassee, FL

March 16, 1990Okaloosa County, Walton County, Florida

NWS Tallahassee, FL issued this flash flood warning at Mar 16, 1990, 7:48 PM CST for Okaloosa County, Walton County, Florida. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued: Mar 16, 1990, 7:48 PM CST (01:48 UTC)
Expired: Mar 16, 1990, 10:45 PM CST
In force: 3 hr
Issued by: NWS Tallahassee, FL
Area: Whole counties

Counties Okaloosa County, FL, Walton County, FL

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Apalachicola Mun, FL (KAQQ), launched 00:00Z, 1.8 hours before the alert went out and 167 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: 557 J/kg
Mixed-layer CIN: -15 J/kg
Mixed-layer LCL: 574 m above ground
0-6 km bulk shear: 83 kt
0-1 km storm-relative helicity: 257 m²/s²
0-3 km storm-relative helicity: 250 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 2.8

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KPNS 170150
FFWPNS
FLC033-091-113-131-170445-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PENSACOLA FL
748 PM CST FRI MAR 16 1990
 
THE NATIONAL WEATHER SERVICE IN PENSACOLA HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 1045 PM CST
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN NORTHWEST FLORIDA
 
   ...ESCAMBIA COUNTY...OKALOOSA COUNTY...SANTA ROSA COUNTY
   ...CENTRAL WALTON COUNTY
 
HEAVY RAINS CONTINUE OVER THE WEST FLORIDA PANHANDLE. ADDITIONAL RAIN
OF 2 TO 4 INCHES CAN BE EXPECTED IN THE WARNED COUNTIES THE NEXT 2 TO
3 HOURS. MOST OF THE ROADS IN THE NORTHERN SECTIONS OF ESCAMBIA AND
SANTA ROSA COUNTIES ARE IMPASSABLE. THE SOUTHERN SECTIONS OF THESE
COUNTIES ARE ALSO EXPERIENCING FLOODING OF ROADS...LOW AREAS AND
STREAMS.
 
OKALOOSA AND WALTON COUNTIES ARE EXPERIENCING FLOODING OF ROADS...LOW
AREAS AND STREAMS. SOME ROADS ARE BEING CLOSED DUE TO HIGH WATER.
PLEASE CHECK WITH LOCAL OFFICIALS AS TO ROAD CLOSURES IN YOUR AREA.
 
TRAVEL SHOULD BE RESTRICTED IN THE AFFECTED AREAS. BE ALERT TO THE
POSSIBILITY OF FLOODING AND BE PREPARED FOR QUICK ACTION.
 
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE
THE DANGERS OF FLOODS AND FLASH FLOODS.  IF FLASH FLOODING IS
OBSERVED...ACT QUICKLY.  MOVE UP TO ESCAPE FLOOD WATERS.  DO
NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.
 
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.

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 16, 7:48 PM CST	Flash Flood Warning	TAE	Escambia, Santa Rosa	3 hr
Mar 17, 12:47 AM CST	Tornado Warning	TAE	Bay	28 min

Nearby

Flash Flood Warnings in Florida, 1990 Every flash flood warning in 1990

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.