On the heels of the first significant winter storm to affect all of the Southern Plains and much of the Lower Mississippi Valley, where widespread snow ranged from 3-10 inches across East Texas on February 14th-15th, temperatures plunged to historic values by the morning of the 16th, as readings ranged from -8F to the single digits above zero across East Texas. Strong north winds during and in wake of the winter storm also resulted in extremely low wind chills from the 14th through midday on the 16th, which fell to as low as -10F. As a result, a Wind Chill Advisory was issued for all of East Texas during this time. In all, temperatures remained below freezing (32F) across much of East Texas for 4-7+ days, before finally climbing back above freezing on February 18th-19th.
Here are the lowest temperatures recorded at various locations in East Texas on February 16th:
Bowie County: Texarkana: -1F.
Cass County: Atlanta: -4F.
Titus County: Mount Pleasant: -2F.
Franklin County: Mount Vernon: 1F.
Wood County: Mineola: -8F, Lake Fork Reservoir: -7F.
Upshur County: 1 S Bettie: -5F, Gilmer: -5F.
Marion County: Jefferson: -4F.
Harrison County: Marshall: -6F.
Gregg County: East Texas Regional Airport: -5F, Longview: -4F.
Smith County: Tyler Pounds Field Airport: -6F, Tyler: -3F.
Cherokee County: Jacksonville: -6F, Rusk: -3F.
Rusk County: Henderson: -3F.
Panola County: Carthage: 4F.
Nacogdoches County: Nacogdoches: -3F.
Angelina County: Angelina County Airport (Burke): 4F.
San Augustine County: San Augustine: 1F.

During this historic winter blast, Tyler Pounds Field Airport (Smith County) observed 178 consecutive hours where temperatures remained at or below freezing (from Feb. 11th-19th), which tied for 3rd longest (with Jan. 2nd-8th, 1942). The East Texas Regional Airport south of Longview (Gregg County) observed 118 consecutive hours where temperatures remained at or below freezing (from Feb. 13th-18th), which tied for 4th longest (with Jan. 9th-12th, 1973 and Feb. 1st-4th, 1985).
In addition, Tyler Pounds Field Airport set an all-time record low temperature on the 16th, falling to -6F and surpassing the previous coldest low temperature of -3F set back on Jan. 18th, 1930. The East Texas Regional Airport south of Longview also set an all-time record low temperature on the 16th, falling to -5F and surpassing the previous coldest low temperature of -4F set back on Jan. 18th, 1930.
The record cold led to widespread water main breaks and major pipe bursts across much of the area, cutting off water for many communities for up to a week and leading to Boil Water Advisories for several weeks in some communities.  Recovery during the event was hampered further as treacherous roads slowed recovery crews from fixing water main breaks.
Unfortunately, one fatality was recorded in Harrison County on February 15th as a 66 year old white male with prior health problems was found dead of exposure in the woods near Norma Lee Lane mobile home park after wandering away from his home near East Longview.

Cold/Wind Chill in RED RIVER, TEXAS
From 14-FEB-21 00:00:00 to 16-FEB-21 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Cold/Wind Chill in BOWIE, TEXAS
From 14-FEB-21 00:00:00 to 16-FEB-21 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Cold/Wind Chill in CASS, TEXAS
From 14-FEB-21 00:00:00 to 16-FEB-21 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Cold/Wind Chill in MORRIS, TEXAS
From 14-FEB-21 00:00:00 to 16-FEB-21 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Cold/Wind Chill in TITUS, TEXAS
From 14-FEB-21 00:00:00 to 16-FEB-21 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Cold/Wind Chill in CAMP, TEXAS
From 14-FEB-21 00:00:00 to 16-FEB-21 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Cold/Wind Chill in FRANKLIN, TEXAS
From 14-FEB-21 00:00:00 to 16-FEB-21 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Cold/Wind Chill in WOOD, TEXAS
From 14-FEB-21 00:00:00 to 16-FEB-21 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Cold/Wind Chill in UPSHUR, TEXAS
From 14-FEB-21 00:00:00 to 16-FEB-21 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Cold/Wind Chill in MARION, TEXAS
From 14-FEB-21 00:00:00 to 16-FEB-21 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Cold/Wind Chill in HARRISON, TEXAS
From 14-FEB-21 00:00:00 to 16-FEB-21 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Cold/Wind Chill in GREGG, TEXAS
From 14-FEB-21 00:00:00 to 16-FEB-21 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Cold/Wind Chill in SMITH, TEXAS
From 14-FEB-21 00:00:00 to 16-FEB-21 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Cold/Wind Chill in CHEROKEE, TEXAS
From 14-FEB-21 00:00:00 to 16-FEB-21 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Cold/Wind Chill in RUSK, TEXAS
From 14-FEB-21 00:00:00 to 16-FEB-21 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Cold/Wind Chill in PANOLA, TEXAS
From 14-FEB-21 00:00:00 to 16-FEB-21 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Cold/Wind Chill in SHELBY, TEXAS
From 14-FEB-21 00:00:00 to 16-FEB-21 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Cold/Wind Chill in NACOGDOCHES, TEXAS
From 14-FEB-21 00:00:00 to 16-FEB-21 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Cold/Wind Chill in ANGELINA, TEXAS
From 14-FEB-21 00:00:00 to 16-FEB-21 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Cold/Wind Chill in SAN AUGUSTINE, TEXAS
From 14-FEB-21 00:00:00 to 16-FEB-21 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Cold/Wind Chill in SABINE, TEXAS
From 14-FEB-21 00:00:00 to 16-FEB-21 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer