National Weather Service United States Department of Commerce

An upper level system and associated surface low dug into the central Plains on April 29th and then tracked eastward across the southeastern United Sates during the day on April 30th. Showers and thunderstorms erupted along a pre-frontal trough on the 29th across Arkansas, Oklahoma, Louisiana, and Texas. These moved east towards the Tennessee Valley during the overnight hours on the 29th into the 30th. The line of storms was located across central Mississippi by sunrise on the 30th. The atmosphere became more unstable and the line of storms intensified as it started to cross into Alabama during the late morning and early afternoon hours on the 30th. The wind shear ahead of the thunderstorms was very favorable for embedded strong to severe storms. Multiple bow-echos formed as the line crossed from Mississippi into Alabama and tornado warnings were issued for west central Alabama. These bow-echoes tracked north into northern Alabama and two tornado warnings were issued over the Huntsville forecast area. The tornado warned storm was located in eastern Lauderdale and western Limestone Counties near Rogersville. No damage was reported with this warning. The second warning was issued for northern Cullman and southern Morgan Counties. Damage consistent with an EF-0 tornado was found in Cullman County. 

In addition to those warnings, multiple Severe Thunderstorm Warnings were issued for damaging wind gusts associated with the line of storms. Reports of trees and power lines were recorded across much of northern Alabama and southern middle Tennessee. Unfortunately, there was one reported fatality in Tennessee where a tree fell on a woman. The line continued to track east into northern Georgia where additional thunderstorm wind damage was reported with the line. The cold front didn't move across the area until the evening and overnight hours of April 30th to May 1st. No damage was reported with the storms that moved through overnight. 


 
Storm Reports
Tornado Watch #182 was issued at 10:35 AM. Tornado Watch #183 was issued at 1:35 PM. 

 
Storm Reports
Click on the image to view the storm reports.  Radar loop showing the QLCS as it moved across the TN Valley.

 

Tornado - RED BAY AL
Franklin County, AL 

Click here for more details.

Date April 30, 2017
Time (Local) 212 PM CDT
EF Rating EF-0
Est. Peak Winds 75 mph
Path Length 10 miles
Max Width 215 yards
Injuries/Deaths 0

Summary:

 An EF-0 tornado touched down along CR 1223, about
 six-tenths of a mile from I-65. The tornado 
 traveled the northeast for approximately 10 miles 
 before lifting just east of CR 1527 just south of 
 the Morgan County line. Along its path, the 
 tornado  uprooted several trees and caused many 
 large limbs to be damaged. The most damage occurred
 near CR 1526, where a metal roof was blow off a 
 metal building and minor roof shingle damage 
 occurred.
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Upper Air Charts

250mb Chart at 7 AM April 30th

500mb Chart at 7 AM April 30th

850mb Chart at 7 AM April 30th

250mb Chart at 7 PM April 30th

500mb Chart at 7 PM April 30th

850mb Chart at 7 PM April 30th

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Surface

7 AM April 30th

10 AM April 30th

1 PM April 30th

4 PM April 30th 10 PM April 30th 4 AM May 1st
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SPC Outlooks

Day 3 Outlook 
Issued  230 AM April 28th

 

Day 2 Outlook 
Issued 1:30 AM April 29th

Day 1 Outlook
Issued 7 AM April 30th

Day 1 Tornado Probability
Issued 7 AM April 30th

Day 1 Wind Probability
Issued 7 AM April 22nd

Day 1 Hail Probability
Issued 7 AM April 30th

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Event Images


Trees along the path of the Vinemont tornado were uprooted. 

A tornado near Vinemont in Cullman County caused minor roof damage. 

Straight line winds removed the roof from a metal building in Eva, AL.

A tree fell on a mobile home in Zip City, AL. This damage was due to straight line winds.
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