Tropical Storm Allison (2001)

Basin

North Atlantic

Dates

June 5, 2001 to June 19, 2001

Peak strength

Tropical Storm, 50 kt (58 mph)

Lowest pressure

1000 mb (29.53 inHg)

Landfall

Yes

Accumulated cyclone energy

0.6

Tropical-storm-force wind reached

175 nmi (324 km, 201 mi) from the center at its widest

Eyewall radius at its peak

50 nmi (93 km, 58 mi)

Overall size

120 nmi (222 km, 138 mi) to the outermost closed isobar

Fastest the center moved

28 kt (32 mph)

Identifier

AL012001

Radar at KHGX as it neared land, Jun 5, 21:00 UTC

The sources count different things and are not added together.

Landfall points the US agencies flagged in the best track. The nearest town is named from the site’s gazetteer, not from the report.

NOAA’s Storm Events database, the record National Weather Service offices compile months after a storm, as compiled March 2026.

Deaths

26 (26 direct, 0 indirect)

Injuries

5

Property damage

$5.2 billion

Crop damage

none recorded

Events recorded

213 in 60 reports from 17 states and marine areas

State by state

What was recorded

104 flash flood, 29 thunderstorm wind, 26 tropical storm, 19 flood, 14 tornado, 6 lightning, 5 high wind, 5 heavy rain, 3 funnel cloud, 1 rip current, 1 hail.

14 tornadoes recorded in the United States, strongest first.

The Weather Prediction Center attributes 2,423 rain gauge totals over the contiguous United States to this storm. The wettest reached 40.68 inches (1033 mm).

WPC’s storm rainfall file, 1900 to 2020, compiled by David Roth.

The strongest winds National Weather Service offices recorded with this storm. An estimated figure is a forecaster’s judgment from the damage, not an instrument reading.

From the Storm Events narratives, unedited.

Over ten inches of rain fell in the Youngsville area, resulting in nearly 400 homes and businesses with flood water damages. With US 90 closed between Lafayette and New Iberia, many people risked their life by driving around road barricades into deep, moning water. Fire and police rescue personel used water ski-doos to retrieve dozens of people from roofs of vehicles, and even trees.

Lafayette, Louisiana · Flash Flood · Jun 6, 21:35 UTC

Between five and ten inches of rain fell in less than three hours, resulting in significant flooding in rural sections of western Iberia Parish. More importantly, sections of US 90 were closed between Lafayette and New Iberia for over 12 hours as a result of the large amount of rain in such a short time span. Hundreds of motorists were stranded for hours waiting for flooded roadways to open up.

Iberia, Louisiana · Flash Flood · Jun 6, 22:00 UTC

Around ten inches of rain fell in less than six hours, resulting in widespread flooding across northern Jefferson County, including the metropolitan area of Beaumont. Many people awoke to see flood waters in their homes, vehicles, and businesses. Nearly 900 homes were damaged, but only 10 were classified as destroyed. Roads and bridges also received some damage from the flood waters.

Jefferson, Texas · Flash Flood · Jun 7, 09:30 UTC

The remnants of Tropical Storm Allison led to severe flash flooding over portions of the county. Hwy 147 had to be closed and sever creeks adjacent to highways in town overflowed their banks leading to additional road closures. There were several reports of cars hydroplaning into ditches.

San Augustine, Texas · Lightning · Jun 8, 07:15 UTC

A cluster of severe thunderstorms spawned from the remains of Tropical Storm Allison moved across central George county during the early morning hours. The high winds from the storms did the most damage from the Twin Creeks area north across Inland Beach road to near US Highway 98 just northwest of Lucedale. The damage was all facing to the west as the storms were moving around the eastern periphery of Allison. It was estimated that about twenty-five homes in these areas suffered some form of damage with at least ten manufactured homes damaged so bad they were deemed destroyed. The high winds covered a large area with several trees and power lines also blown down. The roof was taken off one two story home. Five people suffered minor injuries during the storm.

George, Mississippi · Thunderstorm Wind · Jun 11, 11:45 UTC

Wind equipment on Pensacola Beach measured a peak wind gust of 79 mph as a line of thunderstorms moved through the area. The line of storms was associated with the remnants of Tropical Storm Allison, which were moving east across the region. No damage was reported.

Escambia, Florida · Thunderstorm Wind · Jun 11, 14:05 UTC

Numerous roads closed in Panama City and Springfield, with a few washouts. Saturated grounds were responsible for several downed trees and power lines. Between three and five inches of rain fell since midnight from the remnants of Tropical Storm Allison. Reported by the Bay County EMA.

Bay, Florida · Flood · Jun 11, 15:00 UTC

The remnants of Tropical Storm Allison dumped up to 11 inches of rain Monday night and early Tuesday morning. Eight inches of rain fell in Valdosta. Numerous county roads and highways were closed, with numerous washouts. Six families on Martin Lane off of Quitman Road were evacuated from their homes. Numerous trees down in the Sugar Creek subdivision near Valdosta. Several bridges were damaged. A state of emergency was declared for Lowndes County. Reported by the Lowndes County EMA.

Lowndes, Georgia · Flash Flood · Jun 12, 02:00 UTC

The remnants of Tropical Storm Allison dumped up to 10 inches of rain Monday night and early Tuesday morning. More than 50 county and secondary roads were impassable, with some washouts. U.S. Highway 84 was temporarily closed. A state of emergency was declared in Brooks County. Reported by the Brooks County EMA.

Brooks, Georgia · Flash Flood · Jun 12, 02:00 UTC

Several roads in the south part of the town of Luverne became impassable due to standing water resulting from heavy rain. The roads were closed for a couple of hours until the waters receded. The very heavy rainfall occurred as the remnants of Tropical Storm Allison moved east across the area.

Crenshaw, Alabama · Flash Flood · Jun 12, 03:20 UTC

The remnants of Tropical Storm Allison dropped 12 to 16 inches of rain across martin county causing widespread, dangerous flooding. Nearly all primary and secondary roads were closed and flooding reached up to 25 homes causing $200,000 in damage. The worst of the flooding occurred during the early evening hours.

Martin, North Carolina · Flash Flood · Jun 15, 20:30 UTC

A strong cold front combined with some of the moisture from the remnants of Hurricane Allison to produce extreme rainfall rates across portions of the area. The rain gage at NWS Binghamton recorded 3.57 inches of rain in just over one hour and event total estimates across Bradford county were around 5 inches. The rapid runoff from these rains caused flash flooding. Emergency management reported that many roads were washed out including Routes 14 and 187. In Asylum township a State of Emergency was declared and several evacuations were ordered due to an unstable dam on a pond at Gilpin dairy farm. Route 187 suffered significant damage between Moody Road and Durell Road where sluice pipes and sections of the road were washed away.

Bradford, Pennsylvania · Flash Flood · Jun 16, 22:00 UTC

A strong cold front combined with some of the moisture from the remnants of Hurricane Allison to produce extreme rainfall rates across portions of the area. The rain gage at NWS Binghamton recorded 3.57 inches in just over one hour. The rapid runoff from these rains caused flash flooding. Emergency management reported many roads washed out and flooded in Greene, Preston, McDonough, Oxford, and Smithville. Local creeks overflowing thier banks flooded houses and forced some evacuations in Smithville. The extra volume of water put extreme stress on a control gate at Bowman Lake, a major source of summer recreation in McDonough, resulting in its eventual failure. The lake slowly drained out into Bowman Creek over a long period of time until it was empty. The release of water was gradual so no flooding was reported on Bowman Creek.

Chenango, New York · Flash Flood · Jun 16, 23:20 UTC

A strong cold front combined with some of the moisture from the remnants of Hurricane Allison to produce extreme rainfall rates across portions of the area. The rain gage at NWS Binghamton recorded 3.57 inches of rain in just over one hour. The rapid runoff from these rains caused flash flooding. Emergency management reported many roads washed out and flooded in the towns of Barker, Chenango, Maine, and Union. The small Brooks, Castle, and Potato Creeks all left their banks and produced damage to nearby roadways.

Broome, New York · Flash Flood · Jun 16, 23:20 UTC

• Unnamed tropical depressionNorth Atlantic · 2001Tropical Depression25 kt · 1010 mb
• Tropical Storm BarryNorth Atlantic · 2001 · 9 deaths · $30 millionTropical Storm60 kt · 990 mb
• Tropical Storm ChantalNorth Atlantic · 2001Tropical Storm60 kt · 997 mb
• Tropical Storm DeanNorth Atlantic · 2001Tropical Storm60 kt · 994 mb
• Hurricane ErinNorth Atlantic · 2001Cat 3105 kt · 968 mb
• Hurricane FelixNorth Atlantic · 2001Cat 3100 kt · 962 mb
• Hurricane GabrielleNorth Atlantic · 2001 · 3 deathsCat 170 kt · 975 mb
• Unnamed tropical depressionNorth Atlantic · 2001Tropical Depression30 kt · 1005 mb
• Hurricane HumbertoNorth Atlantic · 2001Cat 290 kt · 970 mb
• Hurricane IrisNorth Atlantic · 2001Cat 4125 kt · 948 mb
• Tropical Storm JerryNorth Atlantic · 2001Tropical Storm45 kt · 1004 mb
• Hurricane KarenNorth Atlantic · 2001Cat 170 kt · 982 mb
• Tropical Storm LorenzoNorth Atlantic · 2001Tropical Storm35 kt · 1007 mb
• Hurricane MichelleNorth Atlantic · 2001Cat 4120 kt · 933 mb
• Hurricane NoelNorth Atlantic · 2001Cat 165 kt · 986 mb
• Hurricane OlgaNorth Atlantic · 2001Cat 180 kt · 973 mb

A best track is the record a warning agency settles on after the storm, not what it said at the time: position, maximum sustained wind and central pressure every six hours, revised against every observation that came in later. Category is the Saffir-Simpson scale, which runs from Category 1 at 64 kt to Category 5 at 137 kt and reads wind only, so it says nothing about surge or rain. Accumulated cyclone energy adds up the square of the wind through the storm's life, so it counts strength and duration together.

Storm history from NOAA NCEI’s International Best Track Archive for Climate Stewardship (IBTrACS), which merges the official best track of every warning agency. Live storms, cones, watches and warnings from the National Hurricane Center and the Central Pacific Hurricane Center. Archived radar from NOAA’s Level II archive.

• Tropical cyclone report, National Hurricane Center
• Every advisory and discussion NHC issued while it was live
• Wikipedia article: Tropical Storm Allison