Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 266, NWS Tulsa, OK

August 24, 2002Creek County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Aug 24, 2002, 11:59 PM CDT for Creek County, Oklahoma. It was in force for 46 min. 3 reports 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: Aug 24, 2002, 11:59 PM CDT (04:59 UTC)
Expired: Aug 25, 2002, 12:45 AM CDT
In force: 46 min
Issued by: NWS Tulsa, OK
Area: Counties, with a storm outline in the text

County Creek County, OK

The radar

The Tulsa radar (KINX), 75 km from the middle of the area, began a volume at 04:59 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
Aug 25, 12:20 AM CDT	Hail 1	Oilton, OK
Aug 25, 12:20 AM CDT	Thunderstorm Wind 57 M	Oilton, OK
Aug 25, 12:40 AM CDT	Thunderstorm Wind 61 E	Drumright, OK	Thunderstorm winds estimated at 70 miles an hour blew down trees.

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, 5.0 hours before the alert went out and 119 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1819 J/kg
Mixed-layer CIN: -102 J/kg
Mixed-layer LCL: 1025 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 119 m²/s²
0-3 km storm-relative helicity: 324 m²/s²
Significant tornado parameter: 2.0
Supercell composite: 19.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

025 
WUUS54 KTSA 250459
SVRTUL
OKC037-250545-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
1159 PM CDT SAT AUG 24 2002

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CREEK COUNTY IN NORTHEAST OKLAHOMA

* UNTIL 1245 AM CDT

* AT 1159 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER
  OILTON...MOVING SOUTHEAST AT 25 MPH.

* SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...MANNFORD...
  BRISTOW...DEPEW...SHAMROCK...DRUMRIGHT...OILTON AND KELLYVILLE.

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 3616 9628 3615 9669 3574 9659 3589 9605

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 Aug 24, 9:32 PM CDT, 2 hours 27 minutes earlier.

Area forecast discussion, Aug 24, 9:32 PM CDT, 2 hours 27 minutes before

EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OKLAHOMA
930 PM SAT AUG 24 2002

TRICKY FIRST PERIOD AS FAR AS POPS GO. SURFACE BOUNDARY THIS
EVENING EXTENDS FROM WEST CENTRAL TO SE OK. LOOKS LIKE THE MAIN
PLAYER FOR SRN ZONES TONIGHT MAY BE STORMS CURRENTLY ACROSS THE TX
PANHANDLE/NW OK THAT HAD DEVELOPED IN THE VICINITY OF THE BOUNDARY
AND ARE PUSHING TO THE EAST SOUTHEAST. OTHER STORMS...MORE ELEVATED
IN NATURE HAVE DEVELOPED ACROSS KANSAS AND MISSOURI THOUGH CURRENTLY
REMAIN NORTH OF THE FA. WILL LEAVE POPS AS THEY ARE GIVEN CURRENT
RADAR TRENDS AND PROXIMITY OF BOUNDARY. CURRENTLY ADVERTISED LOWS
LOOK REASONABLE. WILL NOT ISSUE AN UPDATE AT THIS TIME...THOUGH WILL
MONITOR TEMPERATURE AND CONVECTIVE TRENDS FOR POSSIBLE UPDATE
TOWARDS MIDNIGHT.

FORECAST ID= 23

.TSA...
AR...NONE.
OK...NONE.

In the hours before

Local storm report, Aug 24, 6:55 PM CDT, 5 hours 4 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
655 PM CDT SAT AUG 24 2002

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0600 PM    PICHER                    OK   WIND DAMAGE
08/23/02   OTTAWA                         TREES BLOWN DOWN. REPORTED
                                          BY LAW ENFORCEMENT

0730 PM    PICHER                    OK   FLOOD
08/23/02   OTTAWA                         WATER OVER ROAD ON HIGHWAY
                                          69. REPORTED BY LAW
                                          ENFORCEMENT

0757 PM    FOYIL                     OK   65 MPH TSTM WIND GUST
08/23/02   ROGERS                         REPORTED BY LAW
                                          ENFORCEMENT

0810 PM    CLAREMORE                 OK   65 MPH TSTM WIND GUST
08/23/02   ROGERS                         REPORTED BY LAW
                                          ENFORCEMENT

0910 PM    BARTLESVILLE              OK   71 MPH TSTM WIND GUST
08/23/02   OSAGE                          RECORDED BY BVO ASOS
                                          AT FRANK PHILLIPS AIRPORT

1140 PM    CLEVELAND                 OK   WIND DAMAGE
08/23/02   PAWNEE                         TREES DAMAGED BY WINDS
                                          ESTIMATED UP TO 60 MPH.
                                          REPORTED BY LAW
                                          ENFORCEMENT

Special weather statement, Aug 24, 8:45 PM CDT, 3 hours 14 minutes before

ARZ001-002-010-011-019-020-029-OKZ049-053>076-251200-

EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE TULSA OK
845 PM CDT SAT AUG 24 2002

...CHANCE OF SEVERE THUNDERSTORMS TONIGHT...

A STATIONARY SURFACE BOUNDARY EXTENDED FROM NEAR OKLAHOMA CITY TO
JUST NORTH OF MCALESTER TO SOUTH OF FORT SMITH. SCATTERED
THUNDERSTORMS WERE BEGINNING TO DEVELOP NEAR THE BOUNDARY ACROSS
WESTERN AND CENTRAL OKLAHOMA THIS EVENING. SCATTERED TO NUMEROUS
THUNDERSTORMS ARE EXPECTED TO DEVELOP NEAR THE BOUNDARY ACROSS
EASTERN OKLAHOMA LATER THIS EVENING AS LIFTING INCREASES AHEAD OF AN
UPPER LEVEL SYSTEM.

A FEW OF THE THUNDERSTORMS...ESPECIALLY IN AREAS SOUTH OF A LINE
FROM TULSA TO FORT SMITH...COULD BECOME SEVERE TONIGHT AND PRODUCE
LARGE HAIL AND DAMAGING WINDS. THE AIRMASS IS SLIGHTLY MORE STABLE
IN AREAS NORTH OF A TULSA TO FORT SMITH LINE...SO LESS INTENSE
THUNDERSTORMS ARE FORECAST IN THESE AREAS.

.SPOTTER ACTIVATION...
SPOTTER ACTIVATION MAY BE NEEDED BY MIDNIGHT ACROSS PARTS OF
EASTERN OKLAHOMA AND WESTERN ARKANSAS.

.DISCUSSION...
CONVECTIVE DEVELOPMENT IS EXPECTED BY MIDNIGHT AS WARM ADVECTION
LIFT INCREASES ALONG AND NORTH OF THE SURFACE BOUNDARY. ELEVATED
INSTABILITIES OF 2500 J/KG AND MID LEVEL NORTHWESTERLY WINDS
INCREASING TO OVER 30 KNOTS SUPPORT THE POTENTIAL FOR SEVERE
THUNDERSTORMS. MARGINALLY SEVERE HAIL WILL BE POSSIBLE WITH SOME OF
THE THUNDERSTORMS...BUT THE PRIMARY SEVERE WEATHER THREAT WILL BE
DAMAGING STRAIGHT LINE WINDS.

STRONG DIVERGENCE IN THE LEFT FRONT QUADRANT OF AN 80 KNOT UPPER JET
WILL MOVE ACROSS EXTREME NORTHERN OKLAHOMA AND THE NORTHWEST CORNER
OF ARKANSAS TONIGHT. THIS UPPER SUPPORT IS NORMALLY FAVORABLE FOR
SEVERE THUNDERSTORM DEVELOPMENT...BUT INSTABILITY IS LOWER IN THIS
AREA SINCE EARLIER CONVECTION HAD A STABILIZING EFFECT. ISOLATED
SEVERE THUNDERSTORMS WILL STILL BE POSSIBLE...BUT THE MORE ORGANIZED
ACTIVITY IS EXPECTED TO REMAIN FURTHER SOUTH NEAR THE SURFACE
BOUNDARY.

RISK TABLE
VALID THROUGH 1200 UTC SUNDAY

AREA 1...ALONG AND SOUTH OF A LINE FROM TULSA TO FORT SMITH
THUNDERSTORM PROBABILITY...90
SEVERE PROBABILITY IF STORMS OCCUR...50
SIGNIFICANT SEVERE PROBABILITY IF STORMS OCCUR...30

AREA 2...NORTH OF A LINE FROM TULSA TO FORT SMITH
THUNDERSTORM PROBABILITY...100
SEVERE PROBABILITY IF STORMS OCCUR...20
SIGNIFICANT SEVERE PROBABILITY IF STORMS OCCUR...10

RISK 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 RAINFALL IS POSSIBLE TONIGHT AND EARLY SUNDAY MORNING
AS SEVERAL ROUNDS OF THUNDERSTORMS AFFECT THE AREA.

RELATED GRAPHICAL INFORMATION CAN BE FOUND AT:
WWW.SRH.NOAA.GOV/TULSA

The office that day

Everything else NWS Tulsa, OK issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 24, 10:09 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	81 min
Aug 24, 11:14 PM CDT	Severe Thunderstorm Warning	TSA	Rogers, Washington	46 min
Aug 24, 11:19 PM CDT	Severe Thunderstorm Warning	TSA	Creek	41 min
Aug 25, 12:02 AM CDT	Severe Thunderstorm Warning	TSA	Mayes	43 min
Aug 25, 12:56 AM CDT	Severe Thunderstorm Warning	TSA	Creek	49 min
Aug 25, 1:32 AM CDT	Severe Thunderstorm Warning	TSA	Creek, Okfuskee	43 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2002 Every 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.