Alert archive / Arkansas / Flash Flood Warnings in 1990

Flash Flood Warning 33, NWS Tulsa, OK

June 21, 1990Johnson County, Arkansas

NWS Tulsa, OK issued this flash flood warning at Jun 21, 1990, 9:31 AM CDT for Johnson County, Arkansas. It was in force for 59 min.

The area

The counties it named.

The facts

Issued
Jun 21, 1990, 9:31 AM CDT (14:31 UTC)
Expired
Jun 21, 1990, 10:30 AM CDT
In force
59 min
Issued by
NWS Tulsa, OK
Area
Whole counties

County Johnson County, AR

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

Springfield, MO (KUMN), launched 12:00Z, 2.5 hours before the alert went out and 151 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, Springfield, MO at 12:00Z on 1990-06-21Temperature 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 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Springfield, MO at 12:00Z on 1990-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -3 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
2230 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
-3 m²/s²
0-3 km storm-relative helicity
41 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KFSM 211431
FFWFSM
ARC007-071-211530-
 
BULLETIN - EBS ACTIVATION REQUESTED
SEVERE THUNDERSTORM AND FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE FORT SMITH AR
931 AM CDT THU JUN 21 1990
 
THE NATIONAL WEATHER SERVICE IN FORT SMITH HAS ISSUED A
SEVERE THUNDERSTORM AND FLASH FLOOD WARNING
EFFECTIVE UNTIL 1030 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN NORTHWEST ARKANSAS
 
   ...BENTON COUNTY
 
IN WEST ARKANSAS
 
   ...JOHNSON COUNTY
 
AT 925 AM CDT RADAR INDICATES A LINE OF THUNDERSTORMS FROM NEAR
GRAVETT ARKANSAS TO CLARKSVILLE ARKANSAS MOVING SOUTH AT 10 MPH.
SEVERE THUNDERSTORMS ARE INDICATED IN BENTON AND JOHNSON COUNTIES
OF ARKANSAS MOVING EAST AT NEAR 20 MPH. HAIL AND STRONG WINDS CAN
BE EXPECTED.
 
 
WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A
STRONG BUILDING.  DO NOT STAND BY WINDOWS.  DON'T USE TELEPHONES
OR ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY UNTIL THE STORM
HAS PASSED.  MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS.
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.

The office that day

Everything else NWS Tulsa, OK issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 21, 9:31 AM CDTFlash Flood WarningTSABenton59 min
Jun 21, 6:26 PM CDTSevere Thunderstorm WarningTSABenton64 min
Jun 21, 6:42 PM CDTTornado WarningTSABenton33 min
Jun 21, 6:45 PM CDTSevere Thunderstorm WarningTSAWashington60 min

Nearby

Flash Flood Warnings in Arkansas, 1990Every 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.