Alert archive / Arkansas / Flash Flood Warnings in 1990

Flash Flood Warning 43, NWS Shreveport, LA

May 20, 1990Pike County, Arkansas

NWS Shreveport, LA issued this flash flood warning at May 20, 1990, 1:00 AM CDT for Pike County, Arkansas. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued: May 20, 1990, 1:00 AM CDT (06:00 UTC)
Expired: May 20, 1990, 4:00 AM CDT
In force: 3 hr
Issued by: NWS Shreveport, LA
Area: Whole counties

County Pike 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

Longview/Gregg, TX (KGGG), launched 00:00Z, 6.0 hours before the alert went out and 220 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: 1308 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 937 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 161 m²/s²
0-3 km storm-relative helicity: 209 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSHV 200608
FFWSHV
ARC109-200900-

BULLETIN - EBS ACTIVATION REQUESTED
SEVERE THUNDERSTORM AND FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
100 AM CDT SUN MAY 20 1990

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A
SEVERE THUNDERSTORM AND FLASH FLOOD WARNING
EFFECTIVE UNTIL  400 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS..

IN SOUTHWEST ARKANSAS

   ...PIKE COUNTY

SHREVEPORT WEATHER RADAR AT 100 AM SHOWED YET ANOTHER SEVERE
THUNDERSTORM OVER PIKE COUNTY NEAR KIRBY.
MOVEMENT WAS EAST NORTHEAST NEAR 15 MPH.

THIS IS THE FOURTH SEVERE THUNDERSTORM TO MOVE OVER PIKE COUNTY OVER
THE LAST SIX HOURS...THE PREVIOUS TWO STORMS PRODUCED PRODUCED
HIGHS WINDS DOWNING TREES AND SPOTTY HAIL UP TO ONE INCH IN
DIAMETER ALONG WITH HEAVY RAINFALL.  THE NEW SEVERE THUNDERSTORM
WILL LIKELY PRODUCE EQUAL CONDITIONS...THUS ALONG WITH THE THREAT
OF SEVERE WEATHER...FLASH FLOODING WILL LIKELY OCCUR WITH RAINFALL
AMOUNTS POSSIBLY EXCEEDING SEVEN INCHES.

SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR MUCH OF SOUTHERN
ARKANSAS AND SOUTHERN OKLAHOMA.

RAINFALL AMOUNTS BETWEEN LAKE GREESON...GLENWOOD AND PIKE HAVE BEEN
THE HEAVIEST AND WATER WILL LIKELY BEGIN TO AFFECT SEVERAL ROADS
WITH SOME CLOSINGS POSSIBLE.

THESE STORMS WERE PART OF A BAND OF THUNDERSTORMS THAT EXTENDED
SOME NEAR HOT SPRINGS ARKANSAS TO NORTHWEST OF MAGNOLIA ARKANSAS.

ANOTHER BAND OF SHOWERS AND THUNDERSTORMS WAS NOTED FROM NEAR MENA
ARKANSAS ACROSS BATTIEST OKLAHOMA TO NEAR ARDMORE OKLAHOMA.

MOVEMENT WAS SOUTHEAST NEAR 20 MPH.

The office that day

Everything else NWS Shreveport, LA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 19, 7:15 PM CDT	Severe Thunderstorm Warning	SHV	Hempstead, Pike	60 min
May 19, 8:13 PM CDT	Severe Thunderstorm Warning	SHV	Howard, Pike	62 min
May 19, 9:15 PM CDT	Severe Thunderstorm Warning	SHV	Pike	45 min
May 19, 10:00 PM CDT	Flash Flood Warning	SHV	Pike	3 hr
May 19, 10:00 PM CDT	Severe Thunderstorm Warning	SHV	Pike	3 hr
May 20, 1:00 AM CDT	Severe Thunderstorm Warning	SHV	Nevada	2 hr
May 20, 1:00 AM CDT	Severe Thunderstorm Warning	SHV	Pike	3 hr
May 20, 2:20 AM CDT	Tornado Warning	SHV	Little River, Sevier	40 min
May 20, 4:09 AM CDT	Flash Flood Warning	SHV	Nevada, Pike	3 hr

Nearby

Flash Flood Warnings in Arkansas, 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.