Alert archive / Texas / Frost Advisories in 2019

Frost Advisory 1, NWS Amarillo, TX

April 18, 2019Dallam County, Hartley County, Texas; Cimarron County, Oklahoma

NWS Amarillo, TX issued this frost advisory at Apr 18, 2019, 2:28 PM CDT for Dallam County, Hartley County, Texas; Cimarron County, Oklahoma. It took effect at Apr 19, 2019, 12:00 AM CDT. It was in force for 9 hr.

The area

The counties it named.

The facts

Issued
Apr 18, 2019, 2:28 PM CDT (19:28 UTC)
In effect from
Apr 19, 2019, 12:00 AM CDT
Expired
Apr 19, 2019, 9:00 AM CDT
In force
9 hr
Issued by
NWS Amarillo, TX

Counties Cimarron County, OK, Dallam County, TX, Hartley County, TX

The radar

The Amarillo radar (KAMA), 141 km from the middle of the area, began a volume at 19:29 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

Dodge City, (KDDC), launched 12:00Z, 7.5 hours before the alert went out and 289 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, Dodge City, at 12:00Z on 2019-04-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Dodge City, at 12:00Z on 2019-04-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -232 square meters per square second.1939587897117Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1539 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
-232 m²/s²
0-3 km storm-relative helicity
-233 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 Amarillo, TX wrote its last area forecast discussion before this frost advisory went out at Apr 17, 6:31 PM CDT, 19 hours 57 minutes earlier.

Area forecast discussion, Apr 17, 6:31 PM CDT, 19 hours 57 minutes before
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Hazardous weather outlook, Apr 17, 3:34 PM CDT, 22 hours 54 minutes before
Hazardous Weather Outlook
National Weather Service Amarillo TX
334 PM CDT Wed Apr 17 2019

OKZ001>003-TXZ001>020-317-181100-
Cimarron-Texas-Beaver-Dallam-Sherman-Hansford-Ochiltree-Lipscomb-
Hartley-Moore-Hutchinson-Roberts-Hemphill-Oldham-Potter-Carson-
Gray-Wheeler-Deaf Smith-Randall-Armstrong-Donley-Collingsworth-
Palo Duro Canyon-
334 PM CDT Wed Apr 17 2019

This Hazardous Weather Outlook is for the Texas and Oklahoma
Panhandles.

.DAY ONE...Through Tonight.

Thunderstorms are expected. Some storms will become strong to
severe, with severe storms most likely across the southeastern
two-thirds of the Combined Panhandles. Large hail, damaging
winds, and heavy rains, possibly leading to localized flooding
will all be possible. Additionally, an isolated tornado cannot be
ruled out.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Thunderstorms will be possible Sunday night, and again Monday
night and Tuesday. The threat for severe weather with these
storms appears minimal at this time.

.SPOTTER INFORMATION STATEMENT...

Spotters should be ready for activation through this evening.

Cockrell

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 17, 7:19 PM CDTSpecial Weather StatementAMAMoore26 min
Apr 17, 7:35 PM CDTAreal Flood AdvisoryAMACarson, Potter3 hr

Nearby

Frost Advisories in Texas, 2019Frost Advisories in Oklahoma, 2019Every frost advisory in 2019

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.