Alert archive / Texas / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 367, NWS Norman, OK

May 30, 2001Knox County, Texas

NWS Norman, OK issued this severe thunderstorm warning at May 30, 2001, 11:32 PM CDT for Knox County, Texas. It was in force for 43 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued: May 30, 2001, 11:32 PM CDT (04:32 UTC)
Expired: May 31, 2001, 12:15 AM CDT
In force: 43 min
Issued by: NWS Norman, OK
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Knox County, TX

The watch it was issued in

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

Issued	Product	Office	Lasted
May 30, 11:00 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 4.5 hours before the alert went out and 244 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: 3359 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 1522 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 59 m²/s²
0-3 km storm-relative helicity: 102 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 6.6

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KOUN 310432
SVROKC
TXC275-310515-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORMAN OK
1132 PM CDT WED MAY 30 2001

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN KNOX COUNTY IN NORTHERN TEXAS

* UNTIL 1215 AM CDT

* AT 1132 PM CDT...DOPPLER RADAR DETECTED A SEVERE THUNDERSTORM 4   
MILES WEST OF MUNDAY DRIFTING SLOWLY SOUTHEAST.

* LOCATIONS IN THE WARNING INCLUDE 
GOREE...MUNDAY AND RHINELAND

HAIL UP TO THE SIZE OF GOLFBALLS IS LIKELY WITH THIS SEVERE
THUNDERSTORM.

SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH NO ADVANCE WARNING.
MOVE IMMEDIATELY TO A STORM SHELTER... BASEMENT OR STURDY BUILDING IF
A TORNADO IS SIGHTED.

LAT...LON 3356 9999 3341 9997 3341 9948 3357 9948

WR

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 May 30, 10:31 PM CDT, 1 hour 1 minute earlier.

Area forecast discussion, May 30, 10:31 PM CDT, 1 hour 1 minute before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORMAN OK
1031 PM CDT WED MAY 30 2001

SAME SONG...DIFFERENT VERSE...ANOTHER ACTIVE NIGHT ACROSS THE CWA.
HOWEVER...THINGS SEEM TO BE ON THE DOWNWARD TREND...AS SUPERCELL
PROPAGATING ALONG OLD SURFACE BOUNDARY OVER NORTH TEXAS BECOMES MORE
DISORGANIZED WITH TIME. MAIN CONCERN WITH ZONE UPDATE IS WHAT TO DO
WITH POPS. ALREADY SENT UPDATED ZONES TO INCREASE THEM ACROSS WEST
CENTRAL ZONES TO HANDLE SOUTHEASTERLY MOVING CONVECTIVE COMPLEX
ACROSS TEXAS PANHANDLE. HOWEVER...NORTHERN EDGE OF COMPLEX CONTINUES
TO SHOW A DOWNWARD TREND. WITH ABSENCE OF LOW LEVEL FORCING
MECHANISM...HAVE REMOVED POPS ACROSS NORTH CENTRAL AND LOWERED THEM
ACROSS THE CENTRAL ZONES. LEFT POPS HIGH ACROSS SOUTHERN PORTIONS OF
THE AREA...TO ACCOUNT FOR WEST TEXAS MCS...AND PRESENCE OF 850
BOUNDARY ACROSS NORTH TEXAS. OTHERWISE...MADE ONLY MINOR TWEAKS TO
TEMPS AND WINDS.

LANE

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

In the hours before

Local storm report, May 30, 8:04 PM CDT, 3 hours 28 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
804 PM CDT WED MAY 30 2001

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

0801 PM    LAKE ARROWHEAD            TX   1.75 INCH HAIL
05/30/01   CLAY                           SPOTTER REPORT

0750 PM    LAKE ARROWHEAD            TX   1.00 INCH HAIL
05/30/01   CLAY                           SPOTTER REPORT

0800 PM    4 N SCOTLAND              TX   .88 INCH HAIL
05/30/01   ARCHER                         SPOTTER REPORT

0805 PM    SCOTLAND                  TX   1.00 INCH HAIL
05/30/01   ARCHER                         SPOTTER REPORT

CW

Local storm report, May 30, 8:51 PM CDT, 2 hours 41 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
851 PM CDT WED MAY 30 2001

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

0850 PM    WINDTHORST                TX   1.00 INCH HAIL
05/30/01   ARCHER                         SPOTTER REPORT

CW

Local storm report, May 30, 9:38 PM CDT, 1 hour 54 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
938 PM CDT WED MAY 30 2001

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

0935 PM    7W. MUNDAY                 TX   1.75 INCH HAIL
05/30/01   KNOX                           SPOTTER REPORT

CW

Local storm report, May 30, 9:44 PM CDT, 1 hour 48 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
944 PM CDT WED MAY 30 2001

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

0940 PM    11nSSW WINDTHORST          TX   .88 INCH HAIL
05/30/01   ARCHER                         PUBLIC REPORT

CW

Local storm report, May 30, 9:53 PM CDT, 1 hour 39 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
953 PM CDT WED MAY 30 2001

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

0945 PM    E eSIDE MUNDAY             TX   1.00 INCH HAIL
05/30/01   KNOX                           CO-OP OBSERVER

CW

Local storm report, May 30, 10:23 PM CDT, 1 hour 9 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1023 PM CDT WED MAY 30 2001

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

1010 PM    10SW HOLLIDAY             TX   1.00 INCH HAIL
05/30/01   ARCHER                         PUBLIC AT LAKE KICKAPOO

CW

The office that day

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

Issued	Product	Office	Counties	Lasted
May 30, 7:12 PM CDT	Severe Thunderstorm Warning	OUN	Clay	48 min
May 30, 7:25 PM CDT	Severe Thunderstorm Warning	OUN	Archer, Wichita	35 min
May 30, 7:40 PM CDT	Tornado Warning	OUN	Archer, Wichita	50 min
May 30, 7:58 PM CDT	Severe Thunderstorm Warning	OUN	Clay	47 min
May 30, 8:27 PM CDT	Tornado Warning	OUN	Archer	48 min
May 30, 8:43 PM CDT	Severe Thunderstorm Warning	OUN	Clay	47 min
May 30, 9:13 PM CDT	Severe Thunderstorm Warning	OUN	Archer	47 min
May 30, 9:23 PM CDT	Severe Thunderstorm Warning	OUN	Knox	52 min
May 30, 9:58 PM CDT	Severe Thunderstorm Warning	OUN	Archer	47 min
May 30, 10:12 PM CDT	Flash Flood Warning	OUN	Archer	3 hr
May 30, 10:44 PM CDT	Severe Thunderstorm Warning	OUN	Archer	46 min
May 30, 10:56 PM CDT	Severe Thunderstorm Warning	OUN	Baylor	49 min
May 31, 12:05 AM CDT	Severe Thunderstorm Warning	OUN	Clay	40 min

Nearby

Severe Thunderstorm Warnings in Texas, 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.