Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 10, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Apr 9, 1990, 8:26 PM CDT for Mayes County, Rogers County, Oklahoma. It was in force for 64 min. 3 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
- Apr 9, 1990, 8:26 PM CDT (01:26 UTC)
- Expired
- Apr 9, 1990, 9:30 PM CDT
- In force
- 64 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties
Counties Mayes County, OK, Rogers 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 |
|---|---|---|---|
| Apr 9, 8:35 PM CDT | Hail 0.88 | Rogers, OK | |
| Apr 9, 8:54 PM CDT | Hail 0.75 | Mayes, OK | |
| Apr 9, 9:40 PM CDT | Hail 0.88 | Mayes, 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, 1.4 hours before the alert went out and 157 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 904 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 231 m²/s²
- 0-3 km storm-relative helicity
- 236 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 100128 SVRTUL OKC097-131-100230- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 826 PM CDT MON APR 9 1990 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 930 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES ... IN NORTHEAST OKLAHOMA ...MAYES COUNTY...SOUTHERN ROGERS COUNTY AT 827 PM CDT WEATHER RADAR INDICATED A SEVERE THUNDERSTORM 3 MILES SOUTHWEST OF INOLA, OKLAHOMA MOVING NORTHEAST AT 30 MPH. 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, Apr 9, 3:10 PM CDT, 5 hours 16 minutes before
OKZ007-008-012-013-100030- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TULSA, OK 309 PM CDT MON APR 09 1990 ...SEVERE THUNDERSTORMS POSSIBLE IN NORTHEAST OKLAHOMA... STRONG SOUTH WINDS HAVE BROUGHT INCREASINGLY MOIST AND UNSTABLE AIR INTO NORTHEAST OKLAHOMA THIS AFTERNOON. SEVERAL INGREDIENTS ARE COMING TOGETHER FOR THUNDERSTORM FORMATION ACROSS WESTERN OKLAHOMA. THE THUNDERSTORMS ARE EXPECTED TO FORM ACROSS SOUTH CENTRAL KANSAS AND WESTERN OKLAHOMA BY 4 PM AND MOVE EASTWARD INTO NORTHEAST OKLAHOMA LATER THIS EVENING AND TONIGHT. THE THUNDERSTORMS ARE EXPECTED TO FORM IN THE VICINITY OF THE DRY LINE AS AN UPPER LEVEL STORM SYSTEM APPROACHES FROM THE ROCKIES. SOME OF THE THUNDERSTORMS WILL LIKELY BE SEVERE IN WESTERN OKLAHOMA WHERE STRONG INSTABILITY HAS BUILT UP THIS AFTERNOON. THE STORMS WILL MOVE EASTWARD AND AFFECT NORTHEAST OKLAHOMA AFTER 8 PM. SOME OF THE STORMS MAY REMAIN SEVERE AS THE STRONG SOUTH WINDS PROVIDE A RICH MOISTURE SUPPLY TO FUEL THE STORMS. THE MAIN THREAT IN NORTHEAST OKLAHOMA FROM THE THUNDERSTORMS TONIGHT WILL BE LARGE HAIL AND WINDS IN EXCESS OF 60 MPH. SOME HEAVY RAIN WILL ALSO LIKELY ACCOMPANY THE STORMS AS THEY MOVE TO THE EAST. THE SHOWERS AND THUNDERSTORMS WILL END BY TUESDAY MORNING. A COLD FRONT WILL MOVE ACROSS THE AREA EARLY TUESDAY MORNING AND BRING DRIER AND COOLER AIR TO NORTHEAST OKLAHOMA.
The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 9, 9:14 PM CDT | Severe Thunderstorm Warning | TSA | Delaware | 61 min |
| Apr 9, 9:36 PM CDT | Severe Thunderstorm Warning | TSA | Mayes | 69 min |
| Apr 9, 10:00 PM CDT | Severe Thunderstorm Warning | TSA | Cherokee | 60 min |
| Apr 10, 1:59 AM CDT | Severe Thunderstorm Warning | TSA | Cherokee | 61 min |
| Apr 10, 2:06 AM CDT | Severe Thunderstorm Warning | TSA | Pittsburg | 69 min |
| Apr 10, 2:20 AM CDT | Severe Thunderstorm Warning | TSA | Adair | 40 min |
| Apr 10, 2:20 AM CDT | Severe Thunderstorm Warning | TSA | Haskell, Latimer | 40 min |
| Apr 10, 2:24 AM CDT | Severe Thunderstorm Warning | TSA | Sequoyah | 66 min |
| Apr 10, 2:39 AM CDT | Severe Thunderstorm Warning | TSA | LeFlore | 66 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.