Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 121, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at May 19, 1990, 7:31 PM CDT for Muskogee County, Okmulgee County, Oklahoma. It was in force for 59 min. 4 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
- May 19, 1990, 7:31 PM CDT (00:31 UTC)
- Expired
- May 19, 1990, 8:30 PM CDT
- In force
- 59 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties
Counties Muskogee County, OK, Okmulgee 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 |
|---|---|---|---|
| May 19, 7:45 PM CDT | Hail 0.75 | Muskogee, OK | |
| May 19, 7:55 PM CDT | Hail 1.75 | Okmulgee, OK | |
| May 19, 8:25 PM CDT | Hail 0.75 | Muskogee, OK | |
| May 19, 8:38 PM CDT | Hail 1.75 | Muskogee, 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, 0.5 hours before the alert went out and 163 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
- 3426 J/kg
- Mixed-layer CIN
- -16 J/kg
- Mixed-layer LCL
- 1439 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 39 m²/s²
- 0-3 km storm-relative helicity
- 105 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 5.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KTUL 200032 SVRTUL OKC101-111-200130- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 731 PM CDT SAT MAY 19 1990 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 830 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES ... IN EAST CENTRAL OKLAHOMA ...SOUTHERN MUSKOGEE COUNTY IN NORTHEAST OKLAHOMA ...OKMULGEE COUNTY AT 7 28 PM THE TULSA WEATHER RADAR INDICATED SEVERE THUNDERSTORMS NEAR OKMULGEE AND 10 MILES SOUTHWEST OF MUSKOGEE MOVING TO THE SOUTHEAST AT 15 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. A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. REMEMBER... SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. REMAIN CALM BUT BE ALERT TO RAPIDLY CHANGING WEATHER CONDITIONS. KEEP TUNED TO THIS STATION FOR THE LATEST WEATHER BULLETINS.
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, 3:38 PM CDT, 3 hours 53 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE TULSA, OK
334 PM CDT SAT MAY 19 1990
TIME/CDT COUNTY EVENT
220 PM OSAGE DIME SIZE HAIL 5 MILES NORTHEAST OF NEW PRUE.
242 PM OSAGE QUARTER SIZE HAIL 5 MILES EAST OF NEW PRUE.
305 PM OSAGE NICKEL SIZE HAIL 9 MILES NORTHWEST OF SAND
SPRINGS.Local storm report, May 19, 6:27 PM CDT, 1 hour 4 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, 1 hour 3 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.The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| 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, 12:03 AM CDT | Severe Thunderstorm Warning | TSA | LeFlore | 30 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.