Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 20, NWS Tulsa, OK

April 10, 1990LeFlore County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Apr 10, 1990, 2:39 AM CDT for LeFlore County, Oklahoma. It was in force for 66 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Apr 10, 1990, 2:39 AM CDT (07:39 UTC)
Expired
Apr 10, 1990, 3:45 AM CDT
In force
66 min
Issued by
NWS Tulsa, OK
Area
Whole counties

County LeFlore County, OK

The radar

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

What was reported inside it

TimeReportWhereRemark
Apr 10, 3:25 AM CDTThunderstorm Wind 0Le Flore, OK

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Springfield, MO (KUMN), launched 00:00Z, 7.7 hours before the alert went out and 237 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 00:00Z on 1990-04-10Temperature 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 00:00Z on 1990-04-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 231 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
904 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
231 m²/s²
0-3 km storm-relative helicity
236 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 KFSM 100740
SVRFSM
ARC143-033-OKC079-100845-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE FORT SMITH AR
239 AM CDT TUE APR 10 1990
 
THE NATIONAL WEATHER SERVICE IN FORT SMITH HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  345 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN NORTHWEST ARKANSAS
 
   ...WASHINGTON COUNTY
 
IN WEST ARKANSAS
 
   ...CRAWFORD COUNTY
 
 
IN SOUTHEAST OKLAHOMA
 
   ...LE FLORE COUNTY
 
AT 240 AM CDT FORT SMITH RADAR INDICATED A LINE OF SEVERE
THUNDERSTORMS EXTENDING 10 MILES SOUTHWEST OF FAYETTEVILLE ARKANSAS
SOUTHWEST TO WILBURTON OKLAHOMA MOVING SOUTHEAST AT 40 MILES AN HOUR
 
 
A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA.  REMEMBER
SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES
WITH LITTLE OR NO ADVANCE WARNING.  REMAIN CALM BUT BE ALERT TO
RAPIDLY CHANGING WEATHER CONDITIONS.
 
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 COmVERS THE ROAD.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Local storm report, Apr 9, 11:19 PM CDT, 3 hours 20 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE TULSA, OK
1115 PM CDT MON APR 9 1990

 TIME/CDT COUNTY      EVENT
 2054     MAYES       DIME SIZE HAIL SOUTH SIDE OF PRYOR

 2100     MAYES       DIME SIZE HAIL NEAR SALINA

 2035     ROGERS      NICKLE SIZE HAIL 3 NORTHWEST OF INOLA

 2112     MAYES       DIME SIZE HAIL IN PRYOR

 2130     DELAWARE    DIME SIZE HAIL AT LAKE EUCHA 5 SW OF JAY

 2145     DELAWARE    DIME SIZE HAIL 9 WEST OF JAY

 2140     MAYES       NICKEL SIZE HAIL BETWEEN PRYOR AND SALINA

 2205     CHEROKEE    DIME SIZE HAIL 4 MILES WEST OF HULBERT

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 9, 8:26 PM CDTSevere Thunderstorm WarningTSAMayes, Rogers64 min
Apr 9, 9:14 PM CDTSevere Thunderstorm WarningTSADelaware61 min
Apr 9, 9:36 PM CDTSevere Thunderstorm WarningTSAMayes69 min
Apr 9, 10:00 PM CDTSevere Thunderstorm WarningTSACherokee60 min
Apr 10, 1:59 AM CDTSevere Thunderstorm WarningTSACherokee61 min
Apr 10, 2:06 AM CDTSevere Thunderstorm WarningTSAPittsburg69 min
Apr 10, 2:20 AM CDTSevere Thunderstorm WarningTSAAdair40 min
Apr 10, 2:20 AM CDTSevere Thunderstorm WarningTSAHaskell, Latimer40 min
Apr 10, 2:24 AM CDTSevere Thunderstorm WarningTSASequoyah66 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 1990Every severe thunderstorm 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.