Alert archive / Texas / Flood Watches in 2012

Flood Watch 1, NWS Fort Worth, TX

February 18, 201218 counties in Texas

NWS Fort Worth, TX issued this flood watch at Feb 18, 2012, 3:41 AM CST for 18 counties in Texas. It took effect at Feb 18, 2012, 4:00 AM CST. It was in force for 10 hr.

The area

The counties it named.

The facts

Issued: Feb 18, 2012, 3:41 AM CST (09:41 UTC)
In effect from: Feb 18, 2012, 4:00 AM CST
Expired: Feb 18, 2012, 1:52 PM CST
In force: 10 hr
Issued by: NWS Fort Worth, TX
Flood severity: None

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

The radar

The Dallas/Ft Worth radar (KFWS), 112 km from the middle of the area, began a volume at 09:42 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, 9.7 hours before the alert went out and 138 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: 1062 m above ground
0-6 km bulk shear: 75 kt
0-1 km storm-relative helicity: 90 m²/s²
0-3 km storm-relative helicity: 130 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 flood watch 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 flood watch went out at Feb 17, 11:51 PM CST, 3 hours 50 minutes earlier.

Area forecast discussion, Feb 17, 11:51 PM CST, 3 hours 50 minutes before

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Hazardous weather outlook, Feb 17, 9:43 PM CST, 5 hours 58 minutes before

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In the hours before

Special weather statement, Feb 18, 1:55 AM CST, 1 hour 46 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
Feb 18, 1:55 AM CST	Special Weather Statement	FWD	Milam	35 min
Feb 18, 2:35 AM CST	Areal Flood Advisory	FWD	McLennan	3 hr
Feb 18, 7:18 AM CST	Special Weather Statement	FWD	Mills	27 min
Feb 18, 8:58 AM CST	River Flood Warning	FWD	Hunt	13 hr
Feb 18, 8:58 AM CST	River Flood Warning	FWD	Hunt, Rockwall	13 hr
Feb 18, 9:59 AM CST	River Flood Warning	FWD	Navarro	47 hr

Nearby

Flood Watches in Texas, 2012 Every flood watch in 2012

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.