National Weather Service United States Department of Commerce

Stormy Western U.S.

An active and complex weather pattern is in store this weekend through next week, as multiple storms track from West Coast to East Coast. The activity starts today as a vigorous system moves through north-central California into the Intermountain West with rain, perhaps a few thunderstorms and heavy mountain snow. This system will move into the Upper Midwest tomorrow with a swath of heavy snow. Read More >

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Event Summary

A vigorous, fast-moving early autumn storm system brought severe weather to portions of the ArkLaMiss region from the evening of Wednesday October 17th 2012 into the early morning hours of Thursday October 18th. The combination of intense wind shear, very strong forcing, along with adequate moisture and instability levels across the region resulted in severe storms developing ahead of and along a strong cold front as it raced east across the forecast area during the overnight hours. Numerous reports of wind damage from intense supercell and bowing-type thunderstorms were received as they produced strong straight line winds and tornadoes across the area from the Delta Region, southeast into Central Mississippi, and reaching into parts of East Central and Southeast Mississippi. There were sporadic reports of hail, but with such fierce wind shear over the region, straight line winds and tornadoes were the primary modes of severe weather during this event.

To put some historical perspective on this "rare" early Fall severe weather event, the EF-3 that occurred across Scott/Newton counties was only the 2nd F3 to occur in the month of October across MS in recorded history. The 3 strong tornadoes for this event is 2nd all time to the Oct 17, 1980 event where 7 tornadoes occurred (6) of which were strong (F2). Additionally, there were 11 total tornadoes during this event which ties Oct 13, 2001 for the most tornadoes during any October event.

 

 

Tornado Track Map

The map below shows the locations of surveyed tornado tracks as determined by the National Weather Service Office in Jackson. The graphic is followed by a separate table detailing each surveyed tornado track. Maps for individual tornadoes can be found on those subsequent pages.

Event Track Map

Shelby EF-2 TornadoGreenville Straight-line Wind DamageGrenada County EF-1 TornadoHinds County EF-1 TornadoWest Louise EF-2South Louise EF-1 TornadoSoutheast Humphreys EF-1 TornadoEast Yazoo County EF-1 TornadoWest Leake County EF-1 TornadoCarthage EF-1 TornadoNeshoba County EF-1 TornadoConehatta EF-3 Tornado

 

  

Survey Information - Click on the location in the table for additional details

 

Location Start/
End Time
Event Type/
Max Winds
Fatalities/
Injuries
Path Length Path Width
Bolivar County
3.5 NE Shelby to 4.75 NE Shelby
Wed 10/17
9:07 pm -
9:09 pm
EF-2 Tornado
115 mph
none 1 1/4 mile 150 yards
Washington County
1.0 SW Greenville to 2.0 SE Greenville
Wed 10/17
9:35 pm -
9:40 pm
Straight-line wind
80-90 mph
none 4 miles 1.5 miles
Grenada County
5.5 NNW Grenada to 5.5 N Grenada
Wed 10/17
10:12 pm -
10:12 pm
EF-1 Tornado
105 mph
none 1/2 mile 75 yards
Sharkey and Humphreys counties
7 E Anguilla to 3 W Louise
Wed 10/17
10:40 pm -
10:45 pm
EF-2 Tornado
125 mph
Deaths: 0
Injuries: 4
7 miles 1/4 mile
Humphreys County
3 SW Louise to 2 S Louise
Wed 10/17
10:46 pm -
10:49 pm
EF-1 Tornado
110 mph
none 3 miles 100 yards
Humphreys County
5 SE Louise to 7 NW Yazoo City
Wed 10/17
10:56 pm -
10:59 pm
EF-1 Tornado
90 mph
none 2 miles 100 yards
Yazoo County
8 NE Benton to 7 W Pickens
Wed 10/17
11:29 pm -
11:32 pm
EF-1 Tornado
90 mph
none 2 miles 250 yards
Leake County
10 W Carthage to 9.5 W Carthage
Thu 10/18
12:11 am -
12:12 am
EF-1 Tornado
95 mph
none 0.5 miles 525 yards
Leake County
2 ENE Carthage to 2.5 E Carthage
Thu 10/18
12:32 am -
12:34 am
EF-1 Tornado
110 mph
none 1.3 miles 150 yards
Scott and Newton counties
3 SE Harperville to 5 NE Lawrence
Thu 10/18
12:46 am -
1:09 am
EF-3 Tornado
140 mph
Deaths: 0
Injuries: 1
16.25 miles 1/2 mile
Hinds County
2 NE Bolton to 2.5 NE Bolton
Thu 10/18
1:01 am -
1:03 am
EF-1 Tornado
100 mph
None 0.52 miles 50 yards
Neshoba County
2 WSW Bethsaida to 1 W Bethsaida
Thu 10/18
1:12 am -
1:14 am
EF-1 Tornado
100 mph
None 1 mile 150 yards

 

 

Local Storm Reports

Click on the map below for additional details. 

Local Storm Reports

Storm Reports Key

 

National Storm Reports

Click on the map below for additional details.

National Storm Reports

 

Rainfall Totals

Storm-total twenty four hour rainfall amounts of 1 to 2 inches were common across the area. Isolated locations received over 3 inches. Two of the higher reported totals include 3.03 inches in Newton and 3.00 inches at the Turkey Creek Water Park near Decatur, both in Newton County. The map below shows where the highest rainfall accumulations occurred.

Rainfall Reports