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 4-10 inches across Southwest Arkansas on February 14th-15th, temperatures plunged to near historic values by the morning of the 16th, as readings ranged from the single digits to as low as -13F across all of Southwest Arkansas. 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 -15F at times. As a result, a Wind Chill Advisory was issued for all of Southwest Arkansas during this time. In all, temperatures remained below freezing (32F) across all of Southwest Arkansas for 4 1/2 days, before finally climbing back above freezing on February 18th.
Here are the lowest temperatures recorded at various locations in Southwest Arkansas on February 16th:
Miller County: 9 N Fouke: -3F, Texarkana Regional Airport: -1F. These extremely cold temperatures caused multiple pipes to burst on the 5th floor of the Miller County Courthouse during the early morning hours of February 20th, sending water throughout the floors below. Miller County Judge Cathy Harrison, stated that the interior appears to be a total loss, as all of the offices had been destroyed, with ceilings having caved in.
Lafayette County: Buckner: -7F, 9 S Lewisville: 1F, 3 E Garland: 1F, 6 S Bradley: 1F, Lake Erling: 5F.
Columbia County: 5 SW Stephens: 1F.
Union County: 2 NW Norphlet: 3F, South Arkansas Regional Airport: 7F.
Nevada County: Bluff City: -5F, 1 NE Prescott: -4F.
Hempstead County: 7 W Hope: -9F, 1 E Perrytown: -7F.
Howard County: Nashville: -13F.
Sevier County: Helms Sevier County Field: -8F.
Little River County: 4 SSE Ashdown: -5F.

During this historic winter blast, the South Arkansas Regional Airport west of El Dorado (Union County) observed 115 consecutive hours where temperatures remained at or below freezing (from Feb. 13th-18th), which tied for 4th longest (with numerous other dates) on record. The Texarkana Regional Airport (Miller County) observed 113 consecutive hours where temperatures remained at or below freezing (from Feb. 13th-18th).
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.
In addition, Texarkana Regional Airport set a record low temperature of -1F on the 16th, surpassing the previous record of 9F set back on that date in 1903. The South Arkansas Regional Airport also shattered a record low temperature for the date of the 16th, falling to 6F and surpassing the old record of 20F set back in 1991.

Cold/Wind Chill in MILLER, ARKANSAS
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 LITTLE RIVER, ARKANSAS
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 SEVIER, ARKANSAS
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 HOWARD, ARKANSAS
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 HEMPSTEAD, ARKANSAS
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 NEVADA, ARKANSAS
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 LAFAYETTE, ARKANSAS
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 COLUMBIA, ARKANSAS
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 UNION, ARKANSAS
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