Surface high pressure with a touch of arctic air spread across all of Texas during the first full week of December, bringing several hours of temperatures at or below freezing during the early morning hours of December 7th.

Frost/Freeze in JIM HOGG, TEXAS
From 07-DEC-11 01:30:00 to 07-DEC-11 08:15:00 (CST-6)
Reported by: COOP Observer

Temperatures fell to 32 degrees between 130 and 5 AM, and continued falling into the 20s to around 30 across Jim Hogg County before rising above 32 degrees after 8 AM.  Minimum temperatures dropped to 26 degrees at the Cooperative observing station in Hebbronville most likely around 7 AM.  At Jim Hogg County Airport just northwest of town, temperatures were at or below freezing from 130 AM to 815 AM, bottoming out at 29 degrees.

Frost/Freeze in BROOKS, TEXAS
From 07-DEC-11 03:30:00 to 07-DEC-11 08:30:00 (CST-6)
Reported by: COOP Observer

Temperatures fell to 32 degrees around 330 AM, and continued falling into the 20s across most of Brooks County before rising above 32 degrees toward 9 AM.  Minimum temperatures dropped to a new calendar day record of 23 degrees at the Cooperative observing station west of Falfurrias most likely between 7 and 8 AM.  At Brooks County Airport just southeast of town, temperatures were at or below freezing from 4 AM to 8 AM, bottoming out at 28 degrees.

Frost/Freeze in ZAPATA, TEXAS
From 07-DEC-11 03:00:00 to 07-DEC-11 08:15:00 (CST-6)
Reported by: AWOS

Temperatures fell to 32 degrees around 3 AM and continued falling into the 20s across Zapata County before rising above 32 degrees after 815 AM.  Minimum temperature dropped to 26 degrees at the Zapata County Airport in Zapata, most likely around 730 AM.  At the natural gas processing plant in Escobas, temperatures were at or below freezing from 5 AM to 815 AM, bottoming out at 30 degrees.

Frost/Freeze in STARR, TEXAS
From 07-DEC-11 03:00:00 to 07-DEC-11 08:15:00 (CST-6)
Reported by: COOP Observer

Temperatures fell to 32 degrees around 3 AM and continued falling into the 20s across Starr County before rising above 32 degrees after 815 AM.  Minimum temperature dropped to 26 degrees at the Cooperative Observer site at Falcon Lake. At the Cooperative Observer site in Rio Grande City, the minimum temperature was 31 degrees.

Frost/Freeze in HIDALGO, TEXAS
From 07-DEC-11 03:45:00 to 07-DEC-11 07:45:00 (CST-6)
Reported by: COOP Observer

Temperatures fell to 32 degrees around 345 AM and continued falling into the 20s and lower 30s across the northern third of Hidalgo County and a highly populated stretch of Hidalgo County east of the Highway 281 corridor, between McAllen and Weslaco.  Temperatures rose above 32 degrees around 745 AM. Minimum temperature dropped to 26 degrees at the Cooperative Observer site in San Manuel and at the Santa Ana RAWS site. A citizen weather site in La Joya also recorded a minimum of 32 degrees.

Frost/Freeze in KENEDY, TEXAS
From 07-DEC-11 03:30:00 to 07-DEC-11 08:30:00 (CST-6)
Reported by: COOP Observer

Temperatures fell to 32 degrees around 330 AM and continued falling into the 20s across much of Kenedy County before rising above 32 degrees after 830 AM.  Minimum temperature dropped to 25 degrees at the Cooperative Observer site in Armstrong. At the Cooperative Observer site in Sarita, the minimum temperature was 28 degrees.

Frost/Freeze in WILLACY, TEXAS
From 07-DEC-11 03:30:00 to 07-DEC-11 08:30:00 (CST-6)
Reported by: COOP Observer

Temperatures fell to 32 degrees around 330 AM and continued falling into the lower 30s across the eastern two thirds of Willacy County. Temperatures rose above 32 degrees around 830 AM. Minimum temperature dropped to 30 degrees at the Cooperative Observer site in Raymondville. The Cooperative Observe site in Port Mansfield also recorded a minimum of 32 degrees.