Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 150, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at May 12, 2002, 7:06 PM CDT for Pittsburg County, Oklahoma. It was in force for 39 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- May 12, 2002, 7:06 PM CDT (00:06 UTC)
- Expired
- May 12, 2002, 7:45 PM CDT
- In force
- 39 min
- Issued by
- NWS Tulsa, OK
- Area
- Counties, with a storm outline in the text
County Pittsburg County, OK
The radar
The Western Arkansas radar (KSRX), 143 km from the middle of the area, began a volume at 00:07 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 12, 7:00 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Norman, OK (KOUN), launched 00:00Z, 0.1 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
- 2 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 488 m above ground
- 0-6 km bulk shear
- 71 kt
- 0-1 km storm-relative helicity
- -21 m²/s²
- 0-3 km storm-relative helicity
- 140 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 8.5
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS54 KTSA 130006 SVRTUL OKC121-130045- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 706 PM CDT SUN MAY 12 2002 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... PITTSBURG COUNTY IN SOUTHEAST OKLAHOMA * UNTIL 745 PM CDT * AT 706 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 5 MILES SOUTHEAST OF KIOWA...MOVING NORTHEAST AT 30 MPH. * SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...BLANCO... HARTSHORNE...ALDERSON AND KREBS. HAIL TO THE SIZE OF DIMES AND WIND GUSTS TO 60 MPH CAN BE EXPECTED IN THE WARNED AREA. STAY INDOORS AND AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED. LAT...LON 3466 9600 3453 9585 3484 9542 3501 9563
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.
NWS Tulsa, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at May 12, 6:42 PM CDT, 24 minutes earlier.
Area forecast discussion, May 12, 6:42 PM CDT, 24 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 642 PM CDT SUN MAY 12 2002 MOST CONVECTION OVER CWA IS ELEVATED...WITH AN EXCEPTION BEING SEVERE CELL IN WASHINGTON COUNTY ARKANSAS. USING MODIFIED RUC SOUNDING...GETTING A LITTLE OVER 3000 J/KG FOR THIS CELL...VERSUS ABOUT 1200 J/KG WITH ELEVATED STORMS AROUND OKFUSKEE COUNTY. MANY OF THE ELEVATED STORMS LOOK TO BE INDUCING INFLOW ON ON THEIR NORTHERN FLANKS. BOTH SURFACE-BASED STORMS AND ELEVATED STORMS ONLY GETTING 10-15 KT OF RELATIVE INFLOW. PER VWP...COLD AIR ABOUT 3700 FEET DEEP OVER TULSA AREA. ELEVATED STORMS MOSTLY DEPENDENT ON UPPER LIFT THAT SHOULD SLIDE EAST OF CWA BY AROUND MIDNIGHT. THINK THAT STRONG ELEVATED STORMS WILL CONTINUE THROUGH THE EVENING. .TSA... AR...NONE. OK...NONE. MATHEWS
In the hours before
Special weather statement, May 12, 1:15 PM CDT, 5 hours 51 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-131100- EASTERN OKLAHOMA / NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TULSA OK 115 PM CDT SUN MAY 12 2002 ...SEVERE THUNDERSTORMS ARE POSSIBLE THIS AFTERNOON INTO TONIGHT ACROSS MUCH OF EASTERN OKLAHOMA AND NORTHWEST ARKANSAS... THUNDERSTORMS ARE EXPECTED TO DEVELOP ALONG THE COLD FRONT THIS AFTERNOON. THE FRONT IS CURRENTLY LOCATED FROM MIAMI TO TULSA TO BRISTOW AND WILL CONTINUE TO SLOWLY MOVE SOUTHEAST DURING THE AFTERNOON AND EVENING HOURS. THE COMBINATION OF THE COLD FRONT AND AN UPPER LEVEL STORM MOVING INTO THE AREA FROM THE WEST WILL RESULT IN WIDESPREAD SHOWERS AND THUNDERSTORMS TODAY AND TONIGHT. A FEW OF THESE STORMS MAY BE SEVERE WITH HAIL UP TO 1.75 INCHES IN DIAMETER AND DAMAGING WINDS UP TO 65 MILES AN HOUR. .SPOTTER ACTIVATION... SPOTTER ACTIVATION WILL BE NEEDED THIS AFTERNOON INTO TONIGHT ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS. .DISCUSSION... THUNDERSTORMS SHOULD CONTINUE TO DEVELOP THIS AFTERNOON AS AN UPPER LEVEL DISTURBANCE APPROACHES THE AREA. THE ATMOSPHERE AHEAD OF THE SURFACE COLD FRONT REMAINS MODERATELY UNSTABLE AND SHOULD CONTINUE TO DESTABILIZE AS THE UPPER SYSTEM APPROACHES. LARGE HAIL UP TO THE SIZE OF GOLFBALLS WILL BE POSSIBLE WITH SOME OF THE STRONGER STORMS. IF THE STORMS BECOME SURFACE BASED...DAMAGING WINDS MAY ALSO BE POSSIBLE. THE SEVERE WEATHER THREAT WILL LIKELY END BY MIDNIGHT AS DRIER MORE STABLE AIR PUSHES SOUTH INTO THE AREA. THREAT TABLE VALID THROUGH 1200 UTC MONDAY AREA 1...MUCH OF EASTERN OKLAHOMA AND NORTHWEST ARKANSAS THUNDERSTORM PROBABILITY...90 SEVERE PROBABILITY IF STORMS OCCUR...70 SIGNIFICANT SEVERE PROBABILITY IF STORMS OCCUR...20 THREAT AREAS DEFINE THE GREATEST RISK. PROBABILITIES ARE IN PERCENT. SIGNIFICANT SEVERE IS DEFINED AS F1 OR GREATER WIND/TORNADO DAMAGE AND/OR GOLFBALL SIZE HAIL OR LARGER. .OTHER HAZARDS... LOCALLY HEAVY RAINS WILL BE POSSIBLE TODAY AND TONIGHT WITH A FEW LOCATIONS LIKELY TO RECEIVE GREATER THAN 2 INCHES OF RAIN. RELATED GRAPHICAL INFORMATION CAN BE FOUND AT: WWW.SRH.NOAA.GOV/TULSA
Local storm report, May 12, 3:43 PM CDT, 3 hours 23 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
343 PM CDT SUN MAY 12 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0311 PM 2 NORTH PETTIT OK .88 INCH HAIL 05/12/02
CHEROKEE DIME TO NICKEL HAILLocal storm report, May 12, 3:50 PM CDT, 3 hours 16 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
350 PM CDT SUN MAY 12 2002
...CORRECTION FOR DATE GROUP...
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0311 PM 2 NORTH PETTIT OK .88 INCH HAIL
05/12/02 CHEROKEE DIME TO NICKEL HAILLocal storm report, May 12, 4:07 PM CDT, 2 hours 59 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
407 PM CDT SUN MAY 12 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0400 PM 5 N CHOUTEAU OK .75 INCH HAIL
05/12/02 MAYES REPORTED BY EMA
0404 PM PRYOR OK 1.75 INCH HAIL
05/12/02 MAYES REPORTED BY EMALocal storm report, May 12, 6:18 PM CDT, 48 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
618 PM CDT SUN MAY 12 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0417 PM KETCHUM OK .75 INCH HAIL
05/12/02 CRAIG REPORTED BY LAW
ENFORCEMENT
0509 PM 1 E GROVE OK 1.00 INCH HAIL
05/12/02 DELAWARE REPORTED BY EMA
0530 PM 9 NNW TAHLEQUAH OK WIND DAMAGE
05/12/02 CHEROKEE POWER LINES BLOWN DOWN.
REPORTED BY SPOTTERS
0511 PM 3 NE GROVE OK 1.00 INCH HAIL
05/12/02 DELAWARE REPORTED BY SPOTTERS
0528 PM 1 W WESTVILLE OK WIND DAMAGE
05/12/02 ADAIR LARGE TREE BLOWN DOWN.
REPORTED BY LAW ENFORCEMENT
0539 PM STILWELL OK .75 INCH HAIL
05/12/02 ADAIR REPORTED BY LAW
ENFORCEMENT
0540 PM 5 WNW WESTVILLE OK 59 MPH TSTM WIND GUST
05/12/02 ADAIR REPORTED BY OKLAHOMA
MESONETThe office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 12, 7:00 PM CDT | Severe Thunderstorm Warning | TSA | Okmulgee | 45 min |
| May 12, 7:13 PM CDT | Severe Thunderstorm Warning | TSA | Tulsa | 32 min |
| May 12, 7:36 PM CDT | Severe Thunderstorm Warning | TSA | Latimer | 54 min |
| May 12, 8:00 PM CDT | Severe Thunderstorm Warning | TSA | LeFlore | 60 min |
| May 12, 8:01 PM CDT | Severe Thunderstorm Warning | TSA | Mayes, Rogers | 44 min |
| May 12, 8:26 PM CDT | Severe Thunderstorm Warning | TSA | Sequoyah | 64 min |
| May 12, 8:53 PM CDT | Severe Thunderstorm Warning | TSA | Ottawa | 37 min |
| May 12, 9:39 PM CDT | Severe Thunderstorm Warning | TSA | LeFlore | 21 min |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 2002Every severe thunderstorm warning in 2002
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; radar from the NEXRAD Level II archive.