Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 164, NWS Tulsa, OK

May 26, 1990LeFlore County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at May 26, 1990, 1:20 PM CDT for LeFlore County, Oklahoma. It was in force for 55 min.

The area

The counties it named.

The facts

Issued: May 26, 1990, 1:20 PM CDT (18:20 UTC)
Expired: May 26, 1990, 2:15 PM CDT
In force: 55 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.

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 6.3 hours before the alert went out and 248 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: 1863 J/kg
Mixed-layer CIN: -391 J/kg
Mixed-layer LCL: 1411 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 202 m²/s²
0-3 km storm-relative helicity: 211 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KFSM 261821
SVRFSM
ARC033-131-OKC135-079-261915-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE FORT SMITH AR
120 PM CDT SAT MAY 26 1990
 
THE NATIONAL WEATHER SERVICE IN FORT SMITH HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  215 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN WEST ARKANSAS
 
   ...CRAWFORD COUNTY...SEBASTIAN COUNTY
 
 
IN NORTHEAST OKLAHOMA
 
   ...SOUTHEASTERN SEQUOYAH COUNTY
 
IN SOUTHEAST OKLAHOMA
 
   ...NORTHEASTERN LE FLORE COUNTY
 
AT 120 PM CDT FORT SMITH RADAR INDICATED A LINE OF SEVERE
THUNDERSTORMS FROM LEE CREEK IN CRAWFORD COUNTY SOUTHWEST TO PANAMA
OKLAHOMA MOVING SOUTHEAST AT 35 MPH.
 
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 JSO
DON'T DRIVE INTO AREAS WHERE WATER COVERS 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, May 26, 10:32 AM CDT, 2 hours 48 minutes before

STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1030 AM CDT SAT MAY 26 1990

ATTN SELS...REPORTS FOR THIS MORNING, 5/26/90

TIME/CDT     COUNTY      EVENT
 558 AM      OSAGE       DIME SIZE HAIL AT FAIRFAX
 635 AM      PAWNEE      GOLFBALL SIZE HAIL AT RALSTON
 730 AM      OSAGE       DIME SIZE HAIL AT PAWHUSKA
 825 AM      OSAGE       DIME SIZE HAIL 5 MILES WEST OF BARTLESVILLE
 825 AM      WASHINGTON  DIME SIZE HAIL AT BARTLESVILLE
 837 AM      W\ASHINGTON  WIDESPREAD GOLFBALL SIZE AND QUARTER SIZE HAIL
                         AT BARTLESVILLE
 905 AM      WASHINGTON  DIME SIZE TO QUARTER SIZE HAIL IN BARTLESVILLE
 920 AM      NOWATA      DIME SIZE HAIL AT NOWATA

The office that day

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

Issued	Product	Office	Counties	Lasted
May 26, 5:29 AM CDT	Severe Thunderstorm Warning	TSA	Osage	61 min
May 26, 6:32 AM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	58 min
May 26, 7:29 AM CDT	Severe Thunderstorm Warning	TSA	Osage	46 min
May 26, 8:00 AM CDT	Severe Thunderstorm Warning	TSA	Rogers	45 min
May 26, 8:12 AM CDT	Severe Thunderstorm Warning	TSA	Osage, Washington	48 min
May 26, 8:48 AM CDT	Severe Thunderstorm Warning	TSA	Nowata	42 min
May 26, 8:59 AM CDT	Severe Thunderstorm Warning	TSA	Washington	46 min
May 26, 1:20 PM CDT	Severe Thunderstorm Warning	TSA	Sequoyah	55 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 1990 Every 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; the sounding from the Mesonet's radiosonde archive.