A cold front stalled northwest of the Four-State Region over Western Arkansas, Southeast Oklahoma, and North Texas, while a moist and unstable air mass developed ahead of the front during the afternoon and evening of April 10th. Cooling aloft associated with the approach of an upper level trough led to lowering freezing and -20C levels throughout the evening. Several severe thunderstorms with large hail (half-dollar to golfball size) and occasional damaging winds developed later during the evening, mainly over Northeast Texas. Localized flash flooding was also observed as well. The best instability shifted to the southwest of the region overnight, resulting in the thunderstorms weakening late.

Hail in WOOD, TEXAS
From 10-APR-17 17:30:00 to 10-APR-17 17:30:00 (CST-6)
Location: WINNSBORO
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Penny size hail fell in Winnsboro. Report from the KLTV Facebook page.

Tornado in SMITH, TEXAS
From 10-APR-17 18:10:00 to 10-APR-17 18:12:00 (CST-6)
Location: OMEN
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

An EF-1 tornado with maximum estimated winds between 86-90 mph touched down a few miles northwest of the Arp community along County Road 230. This short-lived tornado moved southeast along Farm To Market Road 2103 before lifting. Several trees were uprooted along a narrow path.

Hail in CAMP, TEXAS
From 10-APR-17 18:17:00 to 10-APR-17 18:17:00 (CST-6)
Location: PITTSBURG
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Golfball size hail fell on County Road 2210.

Hail in GREGG, TEXAS
From 10-APR-17 19:35:00 to 10-APR-17 19:35:00 (CST-6)
Location: (GGG)GREGG CO ARPT L
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Penny size hail fell in the Lakeport community.

Hail in UPSHUR, TEXAS
From 10-APR-17 20:53:00 to 10-APR-17 20:53:00 (CST-6)
Location: PRITCHETT
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Penny size hail was reported in the Pritchett Community.

Hail in RUSK, TEXAS
From 10-APR-17 19:05:00 to 10-APR-17 19:05:00 (CST-6)
Location: KILGORE
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Half dollar size hail fell in South Kilgore. Report from the KETK-TV Facebook page.

Hail in GREGG, TEXAS
From 10-APR-17 19:08:00 to 10-APR-17 19:08:00 (CST-6)
Location: KILGORE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Penny size hail fell on Dudley Road on the southeast side of Kilgore.

Thunderstorm Wind in SMITH, TEXAS
From 10-APR-17 18:30:00 to 10-APR-17 18:30:00 (CST-6)
Location: OVERTON
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A large tree was blown down on County Road 26 just northwest of Overton in extreme Eastern Smith County.

Thunderstorm Wind in CASS, TEXAS
From 10-APR-17 19:30:00 to 10-APR-17 19:30:00 (CST-6)
Location: LINDEN
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Numerous trees were blown down across Cass County.

Flash Flood in GREGG, TEXAS
From 10-APR-17 20:03:00 to 10-APR-17 23:00:00 (CST-6)
Location: KILGORE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Highway 259 in Kilgore was reduced to one lane in each direction due to flash flooding.

Flash Flood in GREGG, TEXAS
From 10-APR-17 20:01:00 to 10-APR-17 23:00:00 (CST-6)
Location: (GGG)GREGG CO ARPT L
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

The intersection of Highway 149 and Highway 322 was flooded.

Flash Flood in GREGG, TEXAS
From 10-APR-17 20:03:00 to 10-APR-17 23:00:00 (CST-6)
Location: TENNERYVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Several streets were flooded throughout the city of Longview.

Flash Flood in RUSK, TEXAS
From 10-APR-17 20:08:00 to 10-APR-17 23:00:00 (CST-6)
Location: LAIRD HILL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

The intersection of County Road 171 and County Road 179D (Sunset Lane) was flooded.

Flash Flood in CASS, TEXAS
From 10-APR-17 20:20:00 to 10-APR-17 23:00:00 (CST-6)
Location: LINDEN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

High water across Highway 59 between Linden and Atlanta.

Flash Flood in GREGG, TEXAS
From 10-APR-17 20:21:00 to 10-APR-17 23:00:00 (CST-6)
Location: (GGG)GREGG CO ARPT L
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Farm to Market Road 349 eastbound was blocked at Highway 322 due to high water.

Tornado in RUSK, TEXAS
From 10-APR-17 18:37:00 to 10-APR-17 18:42:00 (CST-6)
Location: OVERTON
Tornado F-scale: EF1
Property damage: 25.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This is a continuation of the EF-0 tornado from eastern Smith County that touched down just west of the Overton city limits. This tornado intensified to an EF-1 as it crossed into the Overton community in Western Rusk County, with maximum estimated winds between 95-105 mph. Several trees were snapped and uprooted with some minor shingle damage occurring to one home. The most concentrated damage was found near the Overton School complex and in the adjacent cemetery along Farm to Market Road 850 before lifting along County Road 128.

Tornado in SMITH, TEXAS
From 10-APR-17 18:35:00 to 10-APR-17 18:37:00 (CST-6)
Location: OVERTON
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

An EF-0 tornado with maximum estimated winds around 75 mph touched down along County Road 223 just west of the Overton city limits near the Smith/Rusk county line, where it uprooted a few small trees. This tornado moved into the city of Overton in Rusk County, where it intensified to an EF-1 with maximum estimated winds of 95-105 mph.

Flash Flood in RUSK, TEXAS
From 10-APR-17 20:45:00 to 10-APR-17 23:00:00 (CST-6)
Location: CROSS RDS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Flooding was reported on County Road 2015 east of Kilgore.