Alert archive / Texas / Frost Advisories in 2015

Frost Advisory 1, NWS San Angelo, TX

November 17, 201512 counties in Texas

NWS San Angelo, TX issued this frost advisory at Nov 17, 2015, 3:17 PM CST for 12 counties in Texas. It took effect at Nov 18, 2015, 3:00 AM CST. It was in force for 5 hr.

The area

The counties it named.

The facts

Issued: Nov 17, 2015, 3:17 PM CST (21:17 UTC)
In effect from: Nov 18, 2015, 3:00 AM CST
Expired: Nov 18, 2015, 8:00 AM CST
In force: 5 hr
Issued by: NWS San Angelo, TX

Counties Coke County, TX, Concho County, TX, Crockett County, TX, Irion County, TX, Kimble County, TX, Mason County, TX, Menard County, TX, Runnels County, TX, Schleicher County, TX, Sterling County, TX, Sutton County, TX, Tom Green County, TX

The radar

The San Angelo radar (KSJT), 28 km from the middle of the area, began a volume at 21:14 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, 9.3 hours before the alert went out and 343 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: 1404 m above ground
0-6 km bulk shear: 60 kt
0-1 km storm-relative helicity: -501 m²/s²
0-3 km storm-relative helicity: -68 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 frost advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS San Angelo, TX wrote its last area forecast discussion before this frost advisory went out at Nov 17, 11:21 AM CST, 3 hours 56 minutes earlier.

Area forecast discussion, Nov 17, 11:21 AM CST, 3 hours 56 minutes before

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Hazardous weather outlook, Nov 17, 6:10 AM CST, 9 hours 7 minutes before

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In the hours before

Local storm report, Nov 17, 9:19 AM CST, 5 hours 58 minutes before

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Local storm report, Nov 17, 10:09 AM CST, 5 hours 8 minutes before

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Local storm report, Nov 17, 12:57 PM CST, 2 hours 20 minutes before

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The office that day

Everything else NWS San Angelo, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Nov 16, 9:43 PM CST	Special Weather Statement	SJT	Sterling	47 min
Nov 16, 10:07 PM CST	Special Weather Statement	SJT	Sterling	38 min
Nov 16, 10:24 PM CST	Special Weather Statement	SJT	Fisher, Nolan	51 min
Nov 16, 10:40 PM CST	Severe Thunderstorm Warning	SJT	Fisher, Jones, Nolan, Taylor	50 min
Nov 16, 10:47 PM CST	Special Weather Statement	SJT	Coke, Irion, Sterling	43 min
Nov 16, 11:15 PM CST	Special Weather Statement	SJT	Haskell	45 min
Nov 16, 11:27 PM CST	Special Weather Statement	SJT	Jones, Taylor	48 min
Nov 16, 11:32 PM CST	Severe Thunderstorm Warning	SJT	Coke, Irion, Sterling, Tom Green	32 min
Nov 16, 11:40 PM CST	Severe Thunderstorm Warning	SJT	Callahan, Jones, Shackelford, Taylor	35 min
Nov 17, 12:10 AM CST	Special Weather Statement	SJT	Callahan, Shackelford, Throckmorton	65 min
Nov 17, 12:46 AM CST	Special Weather Statement	SJT	Coleman	29 min
Nov 17, 4:33 AM CST	Wind Advisory	SJT	Brown, Callahan, Coke, Coleman, Fisher, Haskell and 9 more	11 hr

Nearby

Frost Advisories in Texas, 2015 Every frost advisory in 2015

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.