Alert archive / Texas / Severe Thunderstorm Warnings in 2005

Severe Thunderstorm Warning 21, NWS Fort Worth, TX

March 21, 2005Bosque County, Erath County, Somervell County, Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at Mar 21, 2005, 4:18 AM CST for Bosque County, Erath County, Somervell County, Texas. It was in force for 42 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Mar 21, 2005, 4:18 AM CST (10:18 UTC)
Expired: Mar 21, 2005, 5:00 AM CST
In force: 42 min
Issued by: NWS Fort Worth, TX
Area: Counties, with a storm outline in the text

Counties Bosque County, TX, Erath County, TX, Somervell County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 80 km from the middle of the area, began a volume at 10:20 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.

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 10.3 hours before the alert went out and 103 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: 73 J/kg
Mixed-layer CIN: -15 J/kg
Mixed-layer LCL: 1874 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 37 m²/s²
0-3 km storm-relative helicity: 264 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.

000
WUUS54 KFWD 211018
SVRFWD
TXC035-143-425-211100-
/O.NEW.KFWD.SV.W.0021.050321T1018Z-050321T1100Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE FORT WORTH TX
418 AM CST MON MAR 21 2005

THE NATIONAL WEATHER SERVICE IN FORT WORTH HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN BOSQUE COUNTY IN NORTH CENTRAL TEXAS
  SOUTHEASTERN ERATH COUNTY IN NORTH CENTRAL TEXAS
  SOUTHERN SOMERVELL COUNTY IN NORTH CENTRAL TEXAS

* UNTIL 500 AM CST

* AT 418 AM CST...A SEVERE THUNDERSTORM WAS REPORTED LOCATED 16 MILES
  WEST OF WALNUT SPRINGS...OR ABOUT 18 MILES SOUTHEAST OF
  STEPHENVILLE...AND MOVING NORTHEAST AT 35 MPH. THIS STORM WAS
  CAPABLE OF PRODUCING NICKEL SIZE HAIL.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  WALNUT SPRINGS BY 440 AM CST

FOR YOUR PROTECTION MOVE TO A STURDY SHELTER UNTIL THE STORM PASSES.

IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A STRONG BUILDING AND
STAY INSIDE...AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

LAT...LON 3202 9812 3193 9804 3207 9753 3223 9765

$$

1 follow-up statement

000
WWUS54 KFWD 211044
SVSFWD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
444 AM CST MON MAR 21 2005

TXC035-143-425-211100-
/O.CON.KFWD.SV.W.0021.000000T0000Z-050321T1100Z/
ERATH TX-SOMERVELL TX-BOSQUE TX-
444 AM CST MON MAR 21 2005

...A SEVERE THUNDERSTORM WARNING CONTINUES UNTIL 500 AM CST FOR
NORTHWESTERN BOSQUE...SOUTHERN SOMERVELL AND SOUTHEASTERN ERATH
COUNTIES...

AT 440 AM CST...A SEVERE THUNDERSTORM WAS REPORTED CAPABLE OF
PRODUCING NICKEL SIZE HAIL.  THIS STORM WAS LOCATED NEAR WALNUT
SPRINGS...OR ABOUT 23 MILES NORTHWEST OF CLIFTON...MOVING EAST AT 40
MPH.

THE SEVERE THUNDERSTORM WAS NEAR...
  WALNUT SPRINGS AT 440 AM CST

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM CST
WEDNESDAY EVENING FOR EASTERN TEXAS.

LAT...LON 3202 9812 3194 9805 3207 9753 3223 9765

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 21, 4:42 AM CST	Severe Thunderstorm Warning	FWD	Hill	33 min
Mar 21, 4:52 AM CST	Severe Thunderstorm Warning	FWD	Dallas, Tarrant	23 min
Mar 21, 5:03 AM CST	Severe Thunderstorm Warning	FWD	Hamilton	57 min
Mar 21, 5:46 AM CST	Severe Thunderstorm Warning	FWD	Hill	44 min
Mar 21, 6:44 AM CST	Severe Thunderstorm Warning	FWD	Freestone	46 min
Mar 21, 7:10 AM CST	Severe Thunderstorm Warning	FWD	Leon	35 min

Nearby

Severe Thunderstorm Warnings in Texas, 2005 Every severe thunderstorm warning in 2005

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.