Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 183, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Jun 21, 1990, 2:40 PM CDT for Osage County, Washington County, Oklahoma. It was in force for 50 min. 2 reports 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 21, 1990, 2:40 PM CDT (19:40 UTC)
- Expired
- Jun 21, 1990, 3:30 PM CDT
- In force
- 50 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties
Counties Osage County, OK, Washington 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 21, 3:03 PM CDT | Hail 1.75 | Osage, OK | |
| Jun 21, 3:15 PM CDT | Hail 0.75 | Washington, 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 12:00Z, 7.7 hours before the alert went out and 197 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
- 2055 J/kg
- Mixed-layer CIN
- -112 J/kg
- Mixed-layer LCL
- 1213 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 158 m²/s²
- 0-3 km storm-relative helicity
- 148 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.7
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KTUL 211943 SVRTUL OKC113-147-212030- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 240 PM CDT THU JUN 21 1990 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 330 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES ... IN NORTHEAST OKLAHOMA ...EASTERN OSAGE COUNTY...WASHINGTON COUNTY AT 240 PM RADAR INDICATED A SEVERE THUNDERSTORM 4 MILES NORTH OF BARNSDALL MOVING TOWARD THE EAST NORTHEAST AT ABOUT 20 MILES AN HOUR. LARGE HAIL AND DAMAGING WINDS...AS WELL AS TORRENTIAL RAIN IS LIKELY WITH THIS STORM. SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MPH... LARGE HAIL...DEADLY LIGHTNINGL 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, Jun 21, 2:29 PM CDT, 11 minutes before
OKC105-113-117-143-147-212030- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TULSA OK 229 PM CDT THU JUN 21 1990 ...THUNDERSTORMS DEVELOPING RAPIDLY IN NORTHERN OKLAHOMA... AT 220 PM RADAR INDICATED SCATTERED THUNDERSTORMS...SOME WITH VERY HEAVY RAIN...DEVELOPING RAPIDLY IN NORTH-CENTRAL AND NORTHEAST OKLAHOMA. THE STRONGEST STORMS WERE LOCATED JUST NORTHEAST OF PONCA CITY IN KAY COUNTY...JUST NORTHEAST OF BARNSDALL IN OSAGE COUNTY...AND ABOUT 15 MILES NORTH OF NOWATA IN NOWATA COUNTY. MOVEMENT WAS TOWARD THE EAST NORTHEAST AT ABOUT 20 MILES AN HOUR. THUNDERSTORMS SHOULD CONTINUE TO DEVELOP THIS AFTERNOON ACROSS NORTHEASTERN OKLAHOMA. PEOPLE IN THE PATHS OF THESE STORMS CAN 1EXPECT BRIEF HEAVY RAINFALL...STRONG WINDS...AND POSSIBLY SMALL HAIL. RESIDENTS OF NORTHEASTERN OKLAHOMA SHOULD KEEP ALERT FOR THE POSSIBLILITY OF SEVERE WEATHER DEVELOPMENT THE REST OF THIS AFTERNOON AND TONIGHT.
The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 21, 3:13 PM CDT | Severe Thunderstorm Warning | TSA | Nowata, Rogers | 47 min |
| Jun 21, 3:32 PM CDT | Severe Thunderstorm Warning | TSA | Osage | 43 min |
| Jun 21, 3:55 PM CDT | Tornado Warning | TSA | Craig | 50 min |
| Jun 21, 4:07 PM CDT | Severe Thunderstorm Warning | TSA | Craig, Rogers | 53 min |
| Jun 21, 4:57 PM CDT | Severe Thunderstorm Warning | TSA | Craig, Mayes | 48 min |
| Jun 21, 5:22 PM CDT | Severe Thunderstorm Warning | TSA | Rogers | 53 min |
| Jun 21, 5:50 PM CDT | Flash Flood Warning | TSA | Craig, Rogers | 3 hr |
| Jun 21, 6:14 PM CDT | Severe Thunderstorm Warning | TSA | Osage | 46 min |
| Jun 21, 6:28 PM CDT | Tornado Warning | TSA | Osage | 47 min |
| Jun 21, 6:35 PM CDT | Severe Thunderstorm Warning | TSA | Adair | 40 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.