Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 129, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at May 20, 1990, 12:03 AM CDT for LeFlore County, Oklahoma. It was in force for 30 min.
The area
The counties it named.
The facts
- Issued
- May 20, 1990, 12:03 AM CDT (05:03 UTC)
- Expired
- May 20, 1990, 12:33 AM CDT
- In force
- 30 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
Springfield, MO (KUMN), launched 00:00Z, 5.1 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.
- 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
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KFSM 200503 SVRFSM OKC079-200600- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE FORT SMITH AR 1203 AM CDT SUN MAY 20 1990 THE NATIONAL WEATHER SERVICE IN FORT SMITH HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 100 AM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN SOUTHEAST OKLAHOMA ...LE FLORE COUNTY RADAR AT 1200 AM CDT SHOWED SEVERE THUNDERSTORMS JUST NORTH OF POTEAU AND 10 MILES NORTH OF TALIHINA. MOVMENT WAS SLOW TO THE EAST. 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.
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, 6:27 PM CDT, 5 hours 36 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, 5 hours 35 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, 3 hours 18 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.Local storm report, May 19, 10:11 PM CDT, 1 hour 52 minutes before
STORM REPORT NATIONAL WEATHER SERVICE TULSA, OK 1006 PM CDT SAT MAY 19 1990 TIME/CDT COUNTY EVENT 8 48 PM MCINTOSH GOLFBALL SIZE HAIL AT EUFAULA. 9 00 PM OKMULGEE DIME SIZE HAIL 4 MILES SOUTH OKMULGEE.
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, 9:09 PM CDT | Severe Thunderstorm Warning | TSA | Sequoyah | 66 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, 12:54 AM CDT | Flash Flood Warning | TSA | LeFlore | 3 hr |
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; the sounding from the Mesonet's radiosonde archive.