Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 602, NWS Norman, OK

September 20, 2001Woodward County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Sep 20, 2001, 8:45 PM CDT for Woodward County, Oklahoma. It was in force for 45 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Sep 20, 2001, 8:45 PM CDT (01:45 UTC)
Expired: Sep 20, 2001, 9:30 PM CDT
In force: 45 min
Issued by: NWS Norman, OK
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Woodward County, OK

What was reported inside it

Time	Report	Where	Remark
Sep 20, 9:00 PM CDT	Hail 0.75	Woodward, 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.

The watch it was issued in

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

Issued	Product	Office	Lasted
Sep 20, 3:45 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Dodge City, (KDDC), launched 00:00Z, 1.8 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: 488 J/kg
Mixed-layer CIN: -205 J/kg
Mixed-layer LCL: 2154 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 33 m²/s²
0-3 km storm-relative helicity: 67 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Sep 20, 8:27 PM CDT, 18 minutes earlier.

Area forecast discussion, Sep 20, 8:27 PM CDT, 18 minutes before

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In the hours before

Local storm report, Sep 20, 6:21 PM CDT, 2 hours 24 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
621 PM CDT THU SEP 20 2001

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

0616 PM    THALIA                    TX   .75 INCH HAIL
09/20/01   FOARD                          AMATEUR RADIO REPORT

J

Local storm report, Sep 20, 7:25 PM CDT, 1 hour 20 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
725 PM CDT THU SEP 20 2001

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

0645 PM    2 W PLAINVIEW             OK   3.00 INCH HAIL
09/20/01   WOODS                          SPOTTER REPORT

0710 PM    11 E BUFFALO              OK   2.00 INCH HAIL
09/20/01   HARPER                         PUBLIC REPORT

J

Local storm report, Sep 20, 7:50 PM CDT, 55 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
750 PM CDT THU SEP 20 2001

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

0705 PM    VERA                      TX   WIND DAMAGE. POWER POLES
09/20/01   KNOX                           DOWN. AMATEUR RADIO
                                          REPORT.

J

Local storm report, Sep 20, 8:00 PM CDT, 45 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
800 PM CDT THU SEP 20 2001

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

0748 PM    3 E BUFFALO               OK   .75 INCH HAIL
09/20/01   HARPER                         PUBLIC REPORT

0740 PM    10 E BUFFALO              OK   1.25 INCH HAIL
09/20/01   HARPER                         SPOTTER REPORT

J

Local storm report, Sep 20, 8:07 PM CDT, 38 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
807 PM CDT THU SEP 20 2001

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

0625 PM    4 NNW PLAINVIEW           OK   .75 INCH HAIL
09/20/01   WOODS                          PUBLIC REPORT

J

Local storm report, Sep 20, 8:45 PM CDT, 0 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
845 PM CDT THU SEP 20 2001

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

0815 PM    5 N WOODWARD              OK   1.00 INCH HAIL
09/20/01   WOODWARD                       SPOTTER REPORT

J

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 20, 7:30 PM CDT	Severe Thunderstorm Warning	OUN	Harper	45 min
Sep 20, 8:04 PM CDT	Severe Thunderstorm Warning	OUN	Woodward	41 min
Sep 20, 8:13 PM CDT	Severe Thunderstorm Warning	OUN	Ellis, Harper	32 min
Sep 20, 10:19 PM CDT	Severe Thunderstorm Warning	OUN	Blaine	41 min
Sep 20, 10:39 PM CDT	Severe Thunderstorm Warning	OUN	Kingfisher	51 min
Sep 20, 10:48 PM CDT	Severe Thunderstorm Warning	OUN	Garfield	27 min
Sep 20, 10:54 PM CDT	Severe Thunderstorm Warning	OUN	Blaine	51 min
Sep 20, 11:38 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Kingfisher	52 min
Sep 21, 1:05 AM CDT	Severe Thunderstorm Warning	OUN	Kay	25 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.