Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 124, NWS Tulsa, OK

May 19, 1990Sequoyah County, Oklahoma; Sebastian County, Arkansas

NWS Tulsa, OK issued this severe thunderstorm warning at May 19, 1990, 9:09 PM CDT for Sequoyah County, Oklahoma; Sebastian County, Arkansas. 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: May 19, 1990, 9:09 PM CDT (02:09 UTC)
Expired: May 19, 1990, 10:15 PM CDT
In force: 66 min
Issued by: NWS Tulsa, OK
Area: Whole counties

Counties Sebastian County, AR, Sequoyah 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

Time	Report	Where	Remark
May 19, 9:56 PM CDT	Thunderstorm Wind 0	Sequoyah, 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, 2.2 hours before the alert went out and 184 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: 2736 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 712 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 89 m²/s²
0-3 km storm-relative helicity: 151 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 5.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KFSM 200210
SVRFSM
ARC131-OKC135-200315-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE FORT SMITH AR
909 PM CDT SAT MAY 19 1990
 
THE NATIONAL WEATHER SERVICE IN FORT SMITH HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1015 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN WEST ARKANSAS
 
   ...SEBASTIAN COUNTY
 
 
IN NORTHEAST OKLAHOMA
 
   ...SEQUOYAH COUNTY
 
AT 908 PM WEATHER RADAR INDICATED SEVERE THUNDERSTORMS 10 MILES SOUTH
OF FORT SMITH AND NEAR GORE OKLAHOMA. THE STORMS ARE MOVING SOUTHEAST
AT 10 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 HE!AVY 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.

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 19, 3:38 PM CDT, 5 hours 31 minutes before

STORM REPORT
NATIONAL WEATHER SERVICE TULSA, OK
334 PM CDT SAT MAY 19 1990

TIME/CDT     COUNTY      EVENT

 220 PM      OSAGE       DIME SIZE HAIL 5 MILES NORTHEAST OF NEW PRUE.

 242 PM      OSAGE       QUARTER SIZE HAIL 5 MILES EAST OF NEW PRUE.

 305 PM      OSAGE       NICKEL SIZE HAIL 9 MILES NORTHWEST OF SAND
                         SPRINGS.

Local storm report, May 19, 6:27 PM CDT, 2 hours 42 minutes before

STORM REPORT
NATIONAL WEATHER SERVICE TULSA, OK
613 PM CDT SAT MAY 19 1990

TIME/CDT     COUNTY      EVENT

4 15 PM      OSAGE       DIME SIZE HAIL NEAR NEW PRUE.
4 38 PM      TULSA       QUARTER SIZE HAIL IN SOUTH TULSA.
4 40 PM      TULSA       GOLFBALL SIZE HAIL 5 MILES WEST OF SAND SPRINGS.
4 30 PM      MAYES       DIME SIZE HAIL AT LANGLEY.
4 45 PM      DELAWARE    DIME SIZE HAIL AT CHLOETA.
5 09 PM      MAYES       3/4 INCH HAIL AT LANGLEY.
5 10 PM      OSAGE       DIME SIZE HAIL 2 MILES NE OF NEW PRUE.
5 20 PM      TULSA       DIME SIZE HAIL IN JENKS.
5 35 PM      MAYES       HALF DOLLAR SIZE HAIL AND WIND GUST TO 70 MPH
                         AT LANGLEY.
5 50 PM      MAYES       DIME SIZE HAIL AT SPAVINAW.
5 55 PM      MAYES       75 MPH WIND JUST NORTH OF PRYOR.
6 13 PM      WAGONER     DIME SIZE HAIL AT COWETA.

Local storm report, May 19, 6:28 PM CDT, 2 hours 41 minutes before

STORM REPORT
NATIONAL WEATHER SERVICE TULSA, OK
628 PM CDT SAT MAY 19 1990

TIME/CDT     COUNTY      EVENT

4 15 PM      OSAGE       DIME SIZE HAIL NEAR NEW PRUE.
4 38 PM      TULSA       QUARTER SIZE HAIL IN SOUTH TULSA.
4 40 PM      TULSA       GOLFBALL SIZE HAIL 5 MILES WEST OF SAND SPRINGS.
4 30 PM      MAYES       DIME SIZE HAIL AT LANGLEY.
4 45 PM      DELAWARE    DIME SIZE HAIL AT CHLOETA.
5 09 PM      MAYES       3/4 INCH HAIL AT LANGLEY.
5 10 PM      OSAGE       DIME SIZE HAIL 2 MILES NE OF NEW PRUE.
5 20 PM      TULSA       DIME SIZE HAIL IN JENKS.
5 35 PM      MAYES       HALF DOLLAR SIZE HAIL AND WIND GUST TO 70 MPH
                         AT LANGLEY.
5 50 PM      MAYES       DIME SIZE HAIL AT SPAVINAW.
5 55 PM      MAYES       75 MPH WIND JUST NORTH OF PRYOR.
6 13 PM      WAGONER     DIME SIZE HAIL AT COWETA.

Local storm report, May 19, 8:45 PM CDT, 24 minutes before

STORM REPORT
NATIONAL WEATHER SERVICE TULSA, OK
835 PM CDT SAT MAY 19 1990

TIME/CDT     COUNTY      EVENT

6 10 PM      DELAWARE    GOLFBALL SIZE HAIL 5 MILES SOUTH CLEORA.
6 25 PM      CREEK       GOLFBALL SIZE HAIL 2 MILES SOUTH DRUMRIGHT.
6 40 PM      CREEK       GOLFBALL SIZE HAIL AT DRUMRIGHT.
6 40 PM      MAYES       NICKEL SIZE HAIL AT LOCUST GROVE.
6 40 PM      MUSKOGEE    DIME SIZE HAIL AT HASKELL.
7 15 PM      MUSKOGEE    HALF DOLLAR SIZE HAIL COVERING GROUND 4 MILES
                         SOUTHEAST OF JAMESVILLE.
7 20 PM      OKMULGEE    60-70 MPH WINDS AND GOLFBALL SIZE HAIL 3 MILES
                         EAST OF BALDHILL.
7 45 PM      MUSKOGEE    DIME SIZE HAIL 3 MILES SOUTH BOYNTON.
7 55 PM      OKMULGEE    GOLFBALL SIZE HAIL AT MORRIS.
8 25 PM      MUSKOGEE    DIME SIZE HAIL AT MUSKOGEE.
8 38 PM      MUSKOGEE    GOLFBALL SIZE HAIL AT KEEFETON.

The office that day

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

Issued	Product	Office	Counties	Lasted
May 19, 7:31 PM CDT	Severe Thunderstorm Warning	TSA	Muskogee, Okmulgee	59 min
May 19, 8:34 PM CDT	Severe Thunderstorm Warning	TSA	McIntosh, Muskogee, Okfuskee, Okmulgee	56 min
May 19, 9:52 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	68 min
May 19, 10:15 PM CDT	Severe Thunderstorm Warning	TSA	Sequoyah	60 min
May 20, 12:03 AM CDT	Severe Thunderstorm Warning	TSA	LeFlore	30 min
May 20, 12:54 AM CDT	Flash Flood Warning	TSA	LeFlore	3 hr
May 19, 7:26 PM CDT	Severe Thunderstorm Warning	TSA	Scott, Sebastian	64 min
May 19, 7:48 PM CDT	Severe Thunderstorm Warning	TSA	Benton, Washington	57 min
May 19, 9:45 PM CDT	Severe Thunderstorm Warning	TSA	Logan	60 min
May 19, 9:52 PM CDT	Severe Thunderstorm Warning	TSA	Crawford	68 min
May 19, 10:28 PM CDT	Flash Flood Warning	TSA	Crawford, Franklin, Sebastian	3 hr
May 19, 11:42 PM CDT	Flash Flood Warning	TSA	Logan	3 hr
May 20, 1:40 AM CDT	Flash Flood Warning	TSA	Polk, Scott	2 hr

Nearby

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