Alert archive / Texas / Winter Storm Warnings in 2018

Winter Storm Warning 1, NWS Fort Worth, TX

January 15, 201822 counties in Texas

NWS Fort Worth, TX issued this winter storm warning at Jan 15, 2018, 3:30 AM CST for 22 counties in Texas. It took effect at Jan 16, 2018, 12:00 AM CST. It was in force for 12 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jan 15, 2018, 3:30 AM CST (09:30 UTC)
In effect from: Jan 16, 2018, 12:00 AM CST
Expired: Jan 16, 2018, 12:00 PM CST
In force: 12 hr
Issued by: NWS Fort Worth, TX

All 22 counties

Anderson County, TX, Bell County, TX, Bosque County, TX, Coryell County, TX, Ellis County, TX, Falls County, TX, Freestone County, TX, Hamilton County, TX, Henderson County, TX, Hill County, TX, Hopkins County, TX, Kaufman County, TX, Lampasas County, TX, Leon County, TX, Limestone County, TX, McLennan County, TX, Milam County, TX, Mills County, TX, Navarro County, TX, Rains County, TX, Robertson County, TX, Van Zandt County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 99 km from the middle of the area, began a volume at 09:29 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

Shreveport, LA (KBAD), launched 00:00Z, 9.5 hours before the alert went out and 297 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1920 m above ground
0-6 km bulk shear: 82 kt
0-1 km storm-relative helicity: 161 m²/s²
0-3 km storm-relative helicity: 347 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this winter storm 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 winter storm warning went out at Jan 15, 3:26 AM CST, 4 minutes earlier.

Area forecast discussion, Jan 15, 3:26 AM CST, 4 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 15, 3:32 AM CST	Hard Freeze Watch	FWD	Collin, Cooke, Delta, Denton, Eastland, Fannin and 12 more	36 hr

Nearby

Winter Storm Warnings in Texas, 2018 Every winter storm warning 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.