Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 157, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at May 12, 2002, 8:53 PM CDT for Ottawa County, Oklahoma. It was in force for 37 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- May 12, 2002, 8:53 PM CDT (01:53 UTC)
- Expired
- May 12, 2002, 9:30 PM CDT
- In force
- 37 min
- Issued by
- NWS Tulsa, OK
- Area
- Counties, with a storm outline in the text
County Ottawa County, OK
The radar
The Tulsa radar (KINX), 94 km from the middle of the area, began a volume at 01:56 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 12, 8:58 PM CDT | Hail 0.75 | Fairland, 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.
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 nearest sounding before it
Lamont, OK (KLMN), launched 00:00Z, 1.9 hours before the alert went out and 239 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
- 504 m above ground
- 0-6 km bulk shear
- 72 kt
- 0-1 km storm-relative helicity
- -61 m²/s²
- 0-3 km storm-relative helicity
- 86 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS54 KTSA 130153 SVRTUL OKC115-130230- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 853 PM CDT SUN MAY 12 2002 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHEASTERN OTTAWA COUNTY IN NORTHEAST OKLAHOMA * UNTIL 930 PM CDT * AT 853 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 4 MILES SOUTHEAST OF AFTON...MOVING NORTHEAST AT 55 MPH. * SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...AFTON... FAIRLAND AND WYANDOTTE. HAIL TO THE SIZE OF DIMES CAN BE EXPECTED IN THE WARNED AREA. STAY INDOORS AND AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED. LAT...LON 3668 9502 3667 9474 3677 9462 3700 9462
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, 2 hours 11 minutes earlier.
Area forecast discussion, May 12, 6:42 PM CDT, 2 hours 11 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
Local storm report, May 12, 3:43 PM CDT, 5 hours 10 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, 5 hours 3 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, 4 hours 46 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, 2 hours 35 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
MESONETLocal storm report, May 12, 8:43 PM CDT, 10 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
843 PM CDT SUN MAY 12 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0556 PM LINCOLN AR .75 INCH HAIL
05/12/02 WASHINGTON REPORTED BY
PUBLIC
0625 PM BOLEY OK 1.00 INCH HAIL
05/12/02 OKFUSKEE REPORTED BY
EMA
0644 PM BIXBY OK .88 INCH HAIL
05/12/02 TULSA REPORTED BY
SPOTTERS
0720 PM EUREKA SPRINGS AR .88 INCH HAIL
05/12/02 CARROLL REPORTED BY
PUBLIC
0720 PM EUREKA SPRINGS AR WIND DAMAGE
05/12/02 CARROLL SCATTERED TREES DOWNED.
REPORTED BY LAW ENFORCEMENT
0742 PM 2 W BERRYVILLE AR .75 INCH HAIL
05/12/02 CARROLL REPORTED BY
PUBLIC
0738 PM 4 E WILBURTON OK WIND DAMAGE
05/12/02 LATIMER TREES AND POWER POLES
BLOWN DOWN. REPORTED BY EOC
0830 PM SUMMERFIELD OK 1.75 INCH HAIL
05/12/02 LEFLORE REPORTED BY
SPOTTERS
0825 PM POTEAU OK WIND DAMAGE
05/12/02 LEFLORE NUMEROUS 4 TO 5 INCH
DIAMETER LIMBS BLOWN DOWN.
REPORTED BY LAW ENFORCEMENTLocal storm report, May 12, 8:45 PM CDT, 8 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
845 PM CDT SUN MAY 12 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0556 PM LINCOLN AR .75 INCH HAIL
05/12/02 WASHINGTON REPORTED BY PUBLIC
0625 PM BOLEY OK 1.00 INCH HAIL
05/12/02 OKFUSKEE REPORTED BY EMA
0644 PM BIXBY OK .88 INCH HAIL
05/12/02 TULSA REPORTED BY SPOTTERS
0720 PM EUREKA SPRINGS AR .88 INCH HAIL
05/12/02 CARROLL REPORTED BY PUBLIC
0720 PM EUREKA SPRINGS AR WIND DAMAGE
05/12/02 CARROLL SCATTERED TREES DOWNED.
REPORTED BY LAW ENFORCEMENT
0742 PM 2 W BERRYVILLE AR .75 INCH HAIL
05/12/02 CARROLL REPORTED BY PUBLIC
0738 PM 4 E WILBURTON OK WIND DAMAGE
05/12/02 LATIMER TREES AND POWER POLES
BLOWN DOWN. REPORTED BY EOC
0830 PM SUMMERFIELD OK 1.75 INCH HAIL
05/12/02 LEFLORE REPORTED BY SPOTTERS
0825 PM POTEAU OK WIND DAMAGE
05/12/02 LEFLORE NUMEROUS 4 TO 5 INCH
DIAMETER LIMBS BLOWN DOWN.
REPORTED BY LAW ENFORCEMENTThe 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, 7:06 PM CDT | Severe Thunderstorm Warning | TSA | Pittsburg | 39 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, 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.