Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 366, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Jun 27, 1990, 3:50 AM CDT for Payne County, Oklahoma. It was in force for 40 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
- Jun 27, 1990, 3:50 AM CDT (08:50 UTC)
- Expired
- Jun 27, 1990, 4:30 AM CDT
- In force
- 40 min
- Issued by
- NWS Norman, OK
- Area
- Whole counties
County Payne 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 |
|---|---|---|---|
| Jun 27, 3:55 AM CDT | Hail 0.75 | Payne, 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
Norman, OK (KOUN), launched 00:00Z, 8.8 hours before the alert went out and 103 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
- 3876 J/kg
- Mixed-layer CIN
- -61 J/kg
- Mixed-layer LCL
- 1455 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 100 m²/s²
- 0-3 km storm-relative helicity
- 382 m²/s²
- Significant tornado parameter
- 3.4
- Supercell composite
- 34.5
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KOKC 270851 SVROKC OKC119-270930- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE OKLAHOMA CITY OK 350 AM CDT WED JUN 27 1990 THE NATIONAL WEATHER SERVICE IN OKLAHOMA CITY HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 430 AM CDT FOR THE FOLLOWING OKLAHOMA LOCATIONS... IN CENTRAL OKLAHOMA ...PAYNE COUNTY AT 350 AM RADAR INDICATED A SEVERE THUNDERSTORM 5 MILES NORTH OF STILLWATER MOVING TOWARDS THE SOUTH AT 20 MPH. LARGE HAIL AND STRONG WINDS ARE POSSIBLE WITH THIS STORM. 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, Jun 27, 3:03 AM CDT, 47 minutes before
LOCAL STORM REPORT NATIONAL WEATHER SERVICE OKLAHOMA CITY OK 300 AM CDT WED JUN 27 1990 TIME (CDT) COUNTY REPORT 220 AM PAYNE GOLF BALL HAIL AT PERKINS
The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 27, 2:19 AM CDT | Severe Thunderstorm Warning | OUN | Lincoln | 41 min |
| Jun 27, 2:41 AM CDT | Severe Thunderstorm Warning | OUN | Seminole | 49 min |
| Jun 27, 3:19 AM CDT | Severe Thunderstorm Warning | OUN | Lincoln | 41 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.