Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 215, NWS Tulsa, OK

July 12, 20024 counties in Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Jul 12, 2002, 12:11 PM CDT for 4 counties in Oklahoma. It was in force for 49 min. 2 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: Jul 12, 2002, 12:11 PM CDT (17:11 UTC)
Expired: Jul 12, 2002, 1:00 PM CDT
In force: 49 min
Issued by: NWS Tulsa, OK
Area: Counties, with a storm outline in the text

Counties Muskogee County, OK, Okmulgee County, OK, Tulsa County, OK, Wagoner County, OK

The radar

The Tulsa radar (KINX), 38 km from the middle of the area, began a volume at 17:11 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
Jul 12, 12:17 PM CDT	Thunderstorm Wind 57 M	Bixby, OK
Jul 12, 12:20 PM CDT	Thunderstorm Wind 52 E	Hector, OK	Thunderstorm winds estimated at 60 miles an hour blew down large tree limbs.

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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 12, 12:00 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 5.2 hours before the alert went out and 160 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: 2786 J/kg
Mixed-layer CIN: -19 J/kg
Mixed-layer LCL: 707 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: -12 m²/s²
0-3 km storm-relative helicity: 26 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

863 
WUUS54 KTSA 121711
SVRTUL
OKC101-111-143-145-121800-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
1210 PM CDT FRI JUL 12 2002

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN MUSKOGEE COUNTY IN EAST CENTRAL OKLAHOMA
  NORTHERN OKMULGEE COUNTY IN NORTHEAST OKLAHOMA
  SOUTHERN TULSA COUNTY IN NORTHEAST OKLAHOMA
  WESTERN WAGONER COUNTY IN NORTHEAST OKLAHOMA

* UNTIL 100 PM CDT

* AT 1210 PM CDT...DOPPLER RADAR INDICATED SEVERE THUNDERSTORMS ALONG
  A LINE EXTENDING FROM 2 MILES EAST OF TULSA TO 4 MILES SOUTH OF
  GLENPOOL TO 7 MILES NORTHWEST OF BEGGS...MOVING SOUTHEAST AT 20
  MPH.

* SOME LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE...MORRIS...
  PRESTON...BEGGS...BALD HILL...TULSA...BIXBY...JENKS...GLENPOOL...
  BROKEN ARROW...PORTER...STONEBLUFF...COWETA...ONETA AND HASKELL.

HAIL TO THE SIZE OF DIMES AND WIND GUSTS TO 65 MPH CAN BE EXPECTED IN
THE WARNED AREA. STAY INDOORS AND AWAY FROM WINDOWS UNTIL THE STORM
HAS PASSED.

LAT...LON 3616 9591 3594 9607 3580 9621 3559 9585
          3575 9557 3604 9542

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 Jul 12, 11:04 AM CDT, 1 hour 7 minutes earlier.

Area forecast discussion, Jul 12, 11:04 AM CDT, 1 hour 7 minutes before

EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OKLAHOMA
1104 AM CDT FRI JUL 12 2002

WL KEEP HIGH CHANCE TO LIKELY POPS IN THE FCST FOR TODAY AS COLD
FRONT CREEPS ACROSS NORTHERN OKLAHOMA. THE COLD FRONT IS CURRENTLY
NEAR A RED ROCK TO JOPLIN LINE. THE AMS AHD OF THE CDFNT IS
BECOMING INCREASINGLY UNSTABLE WITH THE ABUNDANT SUNSHINE.
CAPE VALUES ARE CURRENTLY IN THE 2000 TO 3000 J/KG ACROSS MUCH OF
THE FA. ENHANCING THE THUNDERSTORMS CHANCES TODAY WILL BE A 500 MB
TROF PUSHING ACROSS THE AREA IN ASSOCIATED WITH THE UPPER LEVEL
LOW MOVING ACROSS MO. COULD SEE SOME SEVERE THUNDERSTORMS THIS
AFTERNOON AND EVENING WITH DOWNBURST WINDS TO AROUND 60 MPH
POSSIBLE. LARGE HAIL WILL ALSO POSSIBLE AS SLIGHTLY COLDER AIR
ALOFT ADVECTS INTO THE AREA.

WL TWEAK SOME OF THE AFTERNOON MAX TEMPS UP FOR TODAY IN LOCATIONS
THAT ARE CURRENTLY RECEIVING ABUNDANT SUNSHINE.

FORECAST ID = 10

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

In the hours before

Local storm report, Jul 12, 11:58 AM CDT, 13 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1158 AM CDT FRI JUL 12 2002

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

0730 PM    2.5 SW RATTAN             OK   WIND DAMAGE
07/11/02   PUSHMATAHA                     TREES DOWNED BLOCKING
                                          ROADWAY. REPORTED BY
                                          PUBLIC.

0800 PM    3 E HUGO                  OK   60 MPH TSTM WIND GUST
07/11/02   CHOCTAW                        REPORTED BY PUBLIC.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 11, 7:09 PM CDT	Severe Thunderstorm Warning	TSA	Pushmataha	36 min
Jul 11, 7:50 PM CDT	Severe Thunderstorm Warning	TSA	Choctaw	40 min
Jul 12, 12:57 PM CDT	Severe Thunderstorm Warning	TSA	Wagoner	48 min
Jul 12, 1:02 PM CDT	Severe Thunderstorm Warning	TSA	Cherokee	58 min
Jul 12, 1:14 PM CDT	Severe Thunderstorm Warning	TSA	Okfuskee	46 min
Jul 12, 1:57 PM CDT	Severe Thunderstorm Warning	TSA	Adair, Cherokee, Sequoyah	63 min
Jul 12, 2:11 PM CDT	Severe Thunderstorm Warning	TSA	Delaware	49 min
Jul 12, 4:21 PM CDT	Severe Thunderstorm Warning	TSA	Pushmataha	54 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.