Alert archive / Texas / Frost Advisories in 2021
Frost Advisory 2, NWS Amarillo, TX
NWS Amarillo, TX issued this frost advisory at Oct 30, 2021, 1:55 PM CDT for Dallam County, Hartley County, Sherman County, Texas. It took effect at Oct 31, 2021, 3:00 AM CDT. It was in force for 6 hr.
The area
The counties it named.
The facts
- Issued
- Oct 30, 2021, 1:55 PM CDT (18:55 UTC)
- In effect from
- Oct 31, 2021, 3:00 AM CDT
- Expired
- Oct 31, 2021, 9:00 AM CDT
- In force
- 6 hr
- Issued by
- NWS Amarillo, TX
Counties Dallam County, TX, Hartley County, TX, Sherman County, TX
The radar
The Amarillo radar (KAMA), 116 km from the middle of the area, began a volume at 18:52 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
Amarillo Airport, TX (KAMA), launched 12:00Z, 6.9 hours before the alert went out and 117 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2882 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 70 m²/s²
- 0-3 km storm-relative helicity
- 83 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
114 WWUS74 KAMA 301855 NPWAMA URGENT - WEATHER MESSAGE National Weather Service Amarillo TX 155 PM CDT Sat Oct 30 2021 TXZ001-002-006-310400- /O.NEW.KAMA.FR.Y.0002.211031T0800Z-211031T1400Z/ Dallam-Sherman-Hartley- Including the cities of Channing, Dalhart, Romero, Conlen, Stratford, Ware, and Hartley 155 PM CDT Sat Oct 30 2021 ...FROST ADVISORY IN EFFECT FROM 3 AM TO 9 AM CDT SUNDAY... * WHAT...Temperatures as low as 36 will result in frost formation. * WHERE...Dallam, Hartley and Sherman Counties. * WHEN...From 3 AM to 9 AM CDT Sunday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ LG
3 follow-up statements
301 WWUS74 KAMA 310310 NPWAMA URGENT - WEATHER MESSAGE National Weather Service Amarillo TX 1010 PM CDT Sat Oct 30 2021 TXZ001-002-006-311115- /O.CON.KAMA.FR.Y.0002.211031T0800Z-211031T1400Z/ Dallam-Sherman-Hartley- Including the cities of Channing, Dalhart, Romero, Conlen, Stratford, Ware, and Hartley 1010 PM CDT Sat Oct 30 2021 ...FROST ADVISORY REMAINS IN EFFECT FROM 3 AM TO 9 AM CDT SUNDAY... * WHAT...Low temperatures ranging from 33 to 36 degrees may result in frost formation. * WHERE...Dallam, Hartley and Sherman Counties. * WHEN...From 3 AM to 9 AM CDT Sunday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ 02
510 WWUS74 KAMA 311117 NPWAMA URGENT - WEATHER MESSAGE National Weather Service Amarillo TX 617 AM CDT Sun Oct 31 2021 TXZ001-002-006-311400- /O.CON.KAMA.FR.Y.0002.000000T0000Z-211031T1400Z/ Dallam-Sherman-Hartley- Including the cities of Channing, Dalhart, Romero, Conlen, Stratford, Ware, and Hartley 617 AM CDT Sun Oct 31 2021 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM CDT THIS MORNING... * WHAT...Temperatures dipping below 36 will result in frost formation. * WHERE...Dallam, Hartley and Sherman Counties. * WHEN...Until 9 AM CDT this morning. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ Ferguson
668 WWUS74 KAMA 311349 NPWAMA URGENT - WEATHER MESSAGE National Weather Service Amarillo TX 849 AM CDT Sun Oct 31 2021 TXZ001-002-006-311500- /O.EXP.KAMA.FR.Y.0002.000000T0000Z-211031T1400Z/ Dallam-Sherman-Hartley- Including the cities of Channing, Dalhart, Romero, Conlen, Stratford, Ware, and Hartley 849 AM CDT Sun Oct 31 2021 ...FROST ADVISORY WILL EXPIRE AT 9 AM CDT THIS MORNING... The threat has ended. $$ LG
Nearby
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.