Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 422, NWS Norman, OK

June 13, 2001Garvin County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Jun 13, 2001, 2:59 AM CDT for Garvin County, Oklahoma. It was in force for 46 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jun 13, 2001, 2:59 AM CDT (07:59 UTC)
Expired: Jun 13, 2001, 3:45 AM CDT
In force: 46 min
Issued by: NWS Norman, OK
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Garvin County, OK

The radar

The Norman radar (KTLX), 70 km from the middle of the area, began a volume at 07:58 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.

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 8.0 hours before the alert went out and 58 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: 2981 J/kg
Mixed-layer CIN: -143 J/kg
Mixed-layer LCL: 1565 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 54 m²/s²
0-3 km storm-relative helicity: 114 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.9

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 Norman, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 12, 9:20 PM CDT, 5 hours 39 minutes earlier.

Area forecast discussion, Jun 12, 9:20 PM CDT, 5 hours 39 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORMAN OK
920 PM CDT TUE JUN 12 2001

LINE OF THUNDERSTORMS HAS CONTINUED TO PERSIST AND PUSH EAST DESPITE
DECENT CAPPING INVERSION ON THE 00Z OUN SOUNDING.  THE CONVECTION
SHOULD WEAKEN AS IT MOVES EAST INTO THE STRONGER CAP.  THERE HAS
BEEN A SLIGHT DECREASE IN MID LEVEL INTENSITIES IN THE NORTH... BUT
NOT AS MUCH AS I HAD HOPED FOR BY NOW.  HAVE UPDATED ZONES TO EXTEND
POPS FARTHER EAST IN CASE THE SHORTWAVE IS ABLE TO HELP THESE STORMS
CONTINUE FARTHER THAN EXPECTED.  THESE UPDATED ZONES ARE ALREADY OUT.

.26.

.OUN...
OK...NONE.
TX...NONE.

In the hours before

Local storm report, Jun 12, 9:59 PM CDT, 5 hours before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
959 PM CDT TUE JUN 12 2001

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

0952 PM    6 W ELDORADO              OK   .88 INCH HAIL
06/12/01   JACKSON                        AMATEUR RADIO REPORT

0955 PM    AVARD                     OK   60 MPH WIND GUST
06/12/01   WOODS                          ESTIMAWTED BY PUBLIC

KT

Local storm report, Jun 12, 10:30 PM CDT, 4 hours 29 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1030 PM CDT TUE JUN 12 2001

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

0955 PM    2 S ALVA                  OK   63 MPH WIND GUST
06/12/01   WOODS                          MESONET REPORT

1015 PM    CORDELL                   OK   .75' INCH HAIL
06/12/01   WASHITA                        SHERIFFS OFFICE REPORT

J

Local storm report, Jun 13, 1:27 AM CDT, 1 hour 32 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 12, 7:28 PM CDT	Severe Thunderstorm Warning	OUN	Ellis	62 min
Jun 12, 9:46 PM CDT	Severe Thunderstorm Warning	OUN	Harmon, Jackson	44 min
Jun 12, 9:49 PM CDT	Severe Thunderstorm Warning	OUN	Woods	41 min
Jun 12, 10:13 PM CDT	Severe Thunderstorm Warning	OUN	Washita	47 min
Jun 12, 10:14 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa	31 min
Jun 12, 10:23 PM CDT	Severe Thunderstorm Warning	OUN	Major	52 min
Jun 13, 12:22 AM CDT	Severe Thunderstorm Warning	OUN	Comanche, Tillman	38 min
Jun 13, 1:01 AM CDT	Severe Thunderstorm Warning	OUN	Comanche	44 min
Jun 13, 1:40 AM CDT	Severe Thunderstorm Warning	OUN	Grady, Stephens	65 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2001 Every severe thunderstorm warning in 2001

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.