Alert archive / Texas / Special Weather Statements in 2018

Special Weather Statement, NWS Fort Worth, TX

August 20, 2018Bell County, Texas

NWS Fort Worth, TX issued this special weather statement at Aug 20, 2018, 6:21 PM CDT for Bell County, Texas. It was in force for 39 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
Aug 20, 2018, 6:21 PM CDT (23:21 UTC)
Expired
Aug 20, 2018, 7:00 PM CDT
In force
39 min
Issued by
NWS Fort Worth, TX

County Bell County, TX

The radar

The Ft Hood radar (KGRK), 23 km from the middle of the area, began a volume at 23:22 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 12:00Z, 11.4 hours before the alert went out and 212 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-pSkew-T log-p diagram, Fort Worth, TX at 12:00Z on 2018-08-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1009 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Fort Worth, TX at 12:00Z on 2018-08-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 19 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1009 J/kg
Mixed-layer CIN
-120 J/kg
Mixed-layer LCL
1402 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
19 m²/s²
0-3 km storm-relative helicity
37 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.6

Open this sounding in Storm Lab

The text

As transmitted.

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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 20, 4:56 AM CDTSpecial Weather StatementFWDStephens49 min
Aug 20, 7:07 AM CDTSpecial Weather StatementFWDTarrant38 min
Aug 20, 7:52 AM CDTSpecial Weather StatementFWDTarrant38 min
Aug 20, 3:48 PM CDTSpecial Weather StatementFWDBell27 min
Aug 20, 4:12 PM CDTSpecial Weather StatementFWDMilam33 min
Aug 20, 4:51 PM CDTSpecial Weather StatementFWDBell24 min
Aug 20, 5:38 PM CDTSpecial Weather StatementFWDMilam37 min
Aug 20, 5:44 PM CDTSpecial Weather StatementFWDLampasas31 min
Aug 20, 5:50 PM CDTSpecial Weather StatementFWDBell25 min
Aug 20, 6:55 PM CDTSpecial Weather StatementFWDMilam35 min

Nearby

Special Weather Statements in Texas, 2018Every special weather statement in 2018

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.