Alert archive / Texas / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 183, NWS Fort Worth, TX

June 21, 2001Grayson County, Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at Jun 21, 2001, 3:17 PM CDT for Grayson County, Texas. It was in force for 58 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: Jun 21, 2001, 3:17 PM CDT (20:17 UTC)
Expired: Jun 21, 2001, 4:15 PM CDT
In force: 58 min
Issued by: NWS Fort Worth, TX
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Grayson County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 131 km from the middle of the area, began a volume at 20:20 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
Jun 21, 3:20 PM CDT	Hail 0.75	Sadler, TX

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 nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 8.3 hours before the alert went out and 105 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: 566 J/kg
Mixed-layer CIN: -153 J/kg
Mixed-layer LCL: 1284 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: -38 m²/s²
0-3 km storm-relative helicity: 19 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 Fort Worth, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 21, 2:30 PM CDT, 47 minutes earlier.

Area forecast discussion, Jun 21, 2:30 PM CDT, 47 minutes before

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE FORT WORTH TX
230 PM CDT THU JUN 21 2001

AVIATION DISCUSSION...
SCATTERED THUNDERSTORMS DEVELOPED THIS AFTERNOON ALONG TWO
BOUNDARIES. ONE BOUNDARY IS AN OUTFLOW BOUNDARY THAT EXTENDED FROM
DENTON...TO MINERAL WELLS...TO JUST NORTH OF BROWNWOOD...AND THE
OTHER BOUNDARY IS A COLD FRONT THAT EXTENDED FROM EAST CENTRAL
OKLAHOMA....TO SOUTH OF WICHITA FALLS. SOME OF THE SHOWERS AND
THUNDERSTORMS STORMS WILL MOVE INTO THE METROPLEX AIRPORTS BETWEEN 3
AND 6 PM.  BRIEF HEAVY RAIN...GUSTY WINDS...AND CLOUD TO GROUND
LIGHTNING WILL ACCOMPANY THESE STORMS.  UPDATED THE TAFS EARLIER TO
INCLUDE MENTION OF TEMPO TSRA BETWEEN 21 AND 23Z.  58

.FWD...NONE.

In the hours before

Special weather statement, Jun 21, 11:58 AM CDT, 3 hours 19 minutes before

TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-212100-

HAZARDOUS WEATHER OUTLOOK FOR NORTH TEXAS
NATIONAL WEATHER SERVICE FORT WORTH TX
1158 AM CDT THU JUN 21 2001

SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP LATE THIS AFTERNOON
AND TONIGHT AS A COLD FRONT MOVES THROUGH THE REGION. THESE STORMS
ARE NOT EXPECTED TO BECOME SEVERE. CLOUD TO GROUND LIGHTNING
WILL BE THE HAZARDOUS WEATHER THREAT.

Special weather statement, Jun 21, 1:50 PM CDT, 1 hour 27 minutes before

TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-212100-

HAZARDOUS WEATHER OUTLOOK FOR NORTH TEXAS...UPDATED
NATIONAL WEATHER SERVICE FORT WORTH TX
150 PM CDT THU JUN 21 2001

SCATTERED THUNDERSTORMS WILL DEVELOP THIS AFTERNOON AND TONIGHT
ALONG TWO BOUNDARIES. ONE BOUNDARY IS AN OUTFLOW BOUNDARY THAT
EXTENDED FROM DENTON...TO MINERAL WELLS...TO JUST NORTH OF BROWNWOOD
EARLY THIS AFTERNOON. THE OTHER BOUNDARY IS A COLD FRONT THAT
EXTENDED FROM EAST CENTRAL OKLAHOMA....TO SOUTH OF WICHITA FALLS.
THE FRONT WILL MOVE SOUTHEAST THROUGH THE REGION THIS AFTERNOON AND
TONIGHT. THE STORMS ARE NOT EXPECTED TO BECOME SEVERE. CLOUD TO
GROUND LIGHTNING AND WIND GUSTS UP TO 40 MPH WILL BE THE HAZARDOUS
WEATHER THREAT.

The office that day

Everything else NWS Fort Worth, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 21, 3:24 PM CDT	Severe Thunderstorm Warning	FWD	Tarrant	66 min
Jun 21, 3:37 PM CDT	Severe Thunderstorm Warning	FWD	Denton	53 min
Jun 21, 3:55 PM CDT	Severe Thunderstorm Warning	FWD	Parker	50 min
Jun 21, 4:09 PM CDT	Severe Thunderstorm Warning	FWD	Fannin	36 min
Jun 21, 4:31 PM CDT	Severe Thunderstorm Warning	FWD	Tarrant	29 min
Jun 21, 4:34 PM CDT	Severe Thunderstorm Warning	FWD	Denton	41 min
Jun 21, 5:25 PM CDT	Severe Thunderstorm Warning	FWD	Hood	50 min
Jun 21, 5:45 PM CDT	Severe Thunderstorm Warning	FWD	Rains, Van Zandt	45 min
Jun 21, 6:45 PM CDT	Severe Thunderstorm Warning	FWD	Erath	30 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.