Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 220, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Sep 29, 1990, 5:33 PM CDT for Okmulgee County, Oklahoma. It was in force for 42 min.
The area
The counties it named.
The facts
- Issued
- Sep 29, 1990, 5:33 PM CDT (22:33 UTC)
- Expired
- Sep 29, 1990, 6:15 PM CDT
- In force
- 42 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties
County Okmulgee 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, 10.6 hours before the alert went out and 138 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
- 207 J/kg
- Mixed-layer CIN
- -86 J/kg
- Mixed-layer LCL
- 1156 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 86 m²/s²
- 0-3 km storm-relative helicity
- 79 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KTUL 292248 COR SVRTUL OKC111-292315- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 533 PM CDT SAT SEP 29 1990 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 615 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES ... IN NORTHEAST OKLAHOMA ...OKMULGEE COUNTY AT 530 PM RADAR INDICATED A SEVERE THUNDERSTORM JUST SOUTHWEST OF BEGGS MOVING TO THE EAST AT 20 MILES AN HOUR. SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MPH... LARGE HAIL...DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS.
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
Special weather statement, Sep 29, 4:51 PM CDT, 42 minutes before
OKC081-119-292200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TULSA OKLAHOMA 404 PM CDT SAT SEP 29 1990 AT 440 PM THE TULSA RADAR INDICATED A LINE OF STRONG THUNDERSTORMS EXTENDING FROM OILTON TO BRISTOW TO BOLEY...MOVING TO THE EAST AT 15 MILES AN HOUR. PERSONS IN THE PATH OF THESE STORMS CAN EXPECT WINDS OF 45 TO 50 MILES AN HOUR...BREIF HEAVY RAIN AND SMALL HAIL.
Special weather statement, Sep 29, 5:26 PM CDT, 7 minutes before
OKC081-119-292200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TULSA OKLAHOMA 530 PM CDT SAT SEP 29 1990 AT 525 PM THE TULSA RADAR INDICATED A LINE OF STRONG THUNDERSTORMS EXTENDING FROM OSAGE TO SAND SPRING TO SAPULPA TO BEGGS MOVING TO THE NORTHEAST AT 20 MILES AN HOUR. THE HEAVIEST ACTIVITY SHOULD MOVE THROUGH THE TULSA METROPOLITAN AREA WITHIN THE NEXT 45 MINUTES. PERSONS IN THE PATH OF THESE STORMS CAN EXPECT WINDS NEAR 25 MPH AND BREIF HEAVY RAIN.
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.