Warm, humid, and unstable conditions were in place across the Four State Region on May 9th, ahead of a cold front and attendant shortwave trough that traversed the Southern Plains during the afternoon. Large scale forcing ahead of the trough increased during the afternoon, with scattered showers and thunderstorms developing near and ahead of the front across Southwest Arkansas, North Louisiana, and East Texas. Moderate instability and adequate wind shear contributed to the development of strong to severe thunderstorms across the region, which produced damaging winds and large hail. One specific cluster of strong to severe thunderstorms affected portions of Deep East Texas and West-central Louisiana, and continued to redevelop over the same areas, producing a wide swath of heavy rainfall with rainfall amounts of three to in excess of seven inches falling over Southern Cherokee, Nacogdoches, Angelina, San Augustine, and Sabine Counties, as well as Central and Southern Sabine Parish. This resulted in widespread flash flooding over these areas, which persisted into the early morning hours of the 10th before the storms shifted south of the area by daybreak.

Thunderstorm Wind in SABINE, TEXAS
From 09-MAY-21 17:57:00 to 09-MAY-21 17:57:00 (CST-6)
Location: HEMPHILL
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A couple of trees and power lines were downed in Hemphill. A tree was downed on Highway 103. Trees were also downed on Highway 87 South about 4 miles south of Hemphill.

Flash Flood in SAN AUGUSTINE, TEXAS
From 09-MAY-21 20:00:00 to 10-MAY-21 04:00:00 (CST-6)
Location: DENNING
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

FM 1277 between County Road 347 and County Road 3350 was flooded and closed.

Flash Flood in NACOGDOCHES, TEXAS
From 09-MAY-21 20:00:00 to 10-MAY-21 04:00:00 (CST-6)
Location: CHIRENO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

FM 95 was flooded just south of County Road 486.

Flash Flood in SABINE, TEXAS
From 09-MAY-21 21:00:00 to 10-MAY-21 04:00:00 (CST-6)
Location: EAST MAYFIELD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

FM 1592 northwest of Hemphill was flooded and closed.

Thunderstorm Wind in SABINE, TEXAS
From 09-MAY-21 17:50:00 to 09-MAY-21 17:50:00 (CST-6)
Location: MILAM
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees were downed in the Pendleton Harbor community.

Flash Flood in ANGELINA, TEXAS
From 09-MAY-21 18:10:00 to 10-MAY-21 04:00:00 (CST-6)
Location: CLAWSON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Numerous roads were closed due to flooding, including Kurth Drive, Tulane Street, Frank Avenue, Raguet Street, Ellis Avenue, Kiln Avenue, Bynum Street, Hill Street, and Douglas Street. Several vehicles were stalled in high water at various intersections in Lufkin.

Flash Flood in NACOGDOCHES, TEXAS
From 09-MAY-21 19:15:00 to 10-MAY-21 04:00:00 (CST-6)
Location: DOUGLASS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

County Road 789 was closed due to flooding.

Flash Flood in ANGELINA, TEXAS
From 09-MAY-21 19:20:00 to 10-MAY-21 04:00:00 (CST-6)
Location: CLAWSON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Water rose to the hoods of several vehicle stranded on Raguet Street at the intersection of Jefferson Avenue, with the road impassable. Portions of Frank Avenue were also impassable.

Flash Flood in SABINE, TEXAS
From 09-MAY-21 18:15:00 to 10-MAY-21 04:00:00 (CST-6)
Location: MILAM
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Several streets were flooded near Milam.

Flash Flood in ANGELINA, TEXAS
From 09-MAY-21 18:50:00 to 10-MAY-21 04:00:00 (CST-6)
Location: CLAWSON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

FM2497, FM 328, FM 1669, Highway 103 West near Newman Road, FM 1475, FM 706 at Cranford Creek, and FM 2109 were flooded and closed. Highway 69 North was flooded.

Thunderstorm Wind in ANGELINA, TEXAS
From 09-MAY-21 16:45:00 to 09-MAY-21 16:45:00 (CST-6)
Location: LUFKIN
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A power line was downed across a vehicle on Tulane Street, trapping the two occupants inside. No injuries were reported.

Flash Flood in NACOGDOCHES, TEXAS
From 09-MAY-21 19:30:00 to 10-MAY-21 04:00:00 (CST-6)
Location: DEL RENTZEL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Highway 7 near Morral Bayou, County Road 620, County Road 724, and County Road 765 were all closed due to flooding.

Flash Flood in NACOGDOCHES, TEXAS
From 09-MAY-21 19:35:00 to 10-MAY-21 04:00:00 (CST-6)
Location: NACOGDOCHES
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

County Road 525 near the bridge and County Road 526 were both closed due to flooding.

Flash Flood in NACOGDOCHES, TEXAS
From 09-MAY-21 19:45:00 to 10-MAY-21 04:00:00 (CST-6)
Location: MC CLURES
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

County Road 555 between Woden and Etoile was closed due to flooding.

Thunderstorm Wind in NACOGDOCHES, TEXAS
From 09-MAY-21 15:05:00 to 09-MAY-21 15:05:00 (CST-6)
Location: NACOGDOCHES
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A large tree was blown down onto power lines on Park Street in Nacogdoches.

Thunderstorm Wind in SABINE, TEXAS
From 09-MAY-21 18:00:00 to 09-MAY-21 18:00:00 (CST-6)
Location: HEMPHILL
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees were downed in the Indian Mounds community.

Thunderstorm Wind in SABINE, TEXAS
From 09-MAY-21 18:12:00 to 09-MAY-21 18:12:00 (CST-6)
Location: FAIRMOUNT
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A tree was blown down in the Six Mile community.

Flash Flood in ANGELINA, TEXAS
From 09-MAY-21 19:00:00 to 10-MAY-21 04:00:00 (CST-6)
Location: LUFKIN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Multiple streets were flooded in the Briarwood subdivision in Lufkin. Numerous cars were stranded in the area.

Flash Flood in CHEROKEE, TEXAS
From 09-MAY-21 19:00:00 to 10-MAY-21 04:00:00 (CST-6)
Location: FOREST
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

FM 1247 between FM 1911 and FM 2752 was closed due to flooding.

Flash Flood in NACOGDOCHES, TEXAS
From 09-MAY-21 19:45:00 to 10-MAY-21 04:00:00 (CST-6)
Location: SWIFT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

County Road 317 was closed due to flooding.

Flash Flood in NACOGDOCHES, TEXAS
From 09-MAY-21 19:45:00 to 10-MAY-21 04:00:00 (CST-6)
Location: ETOILE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

County Roads 460 and 560 in the Etoile community were both closed due to flooding.

Hail in NACOGDOCHES, TEXAS
From 09-MAY-21 15:25:00 to 09-MAY-21 15:25:00 (CST-6)
Location: NACOGDOCHES
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Nickel size hail fell on Highway 21 and West Loop 224.

Thunderstorm Wind in NACOGDOCHES, TEXAS
From 09-MAY-21 15:33:00 to 09-MAY-21 15:33:00 (CST-6)
Location: BONITA JCT
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Multiple large limbs were downed and full trash cans were blown over on Appleby Sands Road.

Strong Wind in ANGELINA, TEXAS
From 10-MAY-21 01:30:00 to 10-MAY-21 01:30:00 (CST-6)
Magnitude: 22.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A tree fell on a home on Lafayette Street in Lufkin, killing an 80 year old woman inside. Saturated soils from recent heavy rainfall during the evening was the likely cause for the tree to fall.

Flash Flood in SAN AUGUSTINE, TEXAS
From 09-MAY-21 18:03:00 to 10-MAY-21 04:00:00 (CST-6)
Location: MACUNE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Highway 103 was flooded in several locations south of San Augustine.

Flash Flood in NACOGDOCHES, TEXAS
From 09-MAY-21 19:45:00 to 10-MAY-21 04:00:00 (CST-6)
Location: MELROSE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

County Road 411 and Farm to Market Road 226 in the Woden community were both closed due to flooding.

Thunderstorm Wind in NACOGDOCHES, TEXAS
From 09-MAY-21 15:35:00 to 09-MAY-21 15:35:00 (CST-6)
Location: MELROSE
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A very large tree was blown down onto County Road 411. Smaller trees were downed in the same area but not blocking roads.

Thunderstorm Wind in ANGELINA, TEXAS
From 09-MAY-21 16:53:00 to 09-MAY-21 16:53:00 (CST-6)
Location: HUNTINGTON
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Trees were blown down on FM 328, FM 1669, FM 2497, Highway 103 West near Newman Road, FM 1475, FM 706 at Crawford Creek and FM 2109.

Flash Flood in NACOGDOCHES, TEXAS
From 09-MAY-21 19:45:00 to 10-MAY-21 04:00:00 (CST-6)
Location: BONITA JCT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

County Roads 228, 229, 230, and 302 were all closed due to flooding.

Flash Flood in SAN AUGUSTINE, TEXAS
From 09-MAY-21 20:00:00 to 10-MAY-21 04:00:00 (CST-6)
Location: MACUNE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

FM 705 north of Highway 83 west of the Anthony Harbor community was flooded and closed.

Thunderstorm Wind in SABINE, TEXAS
From 09-MAY-21 17:50:00 to 09-MAY-21 17:50:00 (CST-6)
Location: PINELAND
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees and power lines were downed in and near Pineland.