Alert archive / Alabama / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 108, NWS Huntsville, AL
NWS Huntsville, AL issued this severe thunderstorm warning at Jun 23, 2017, 11:54 AM CDT for Colbert County, Franklin County, Alabama. It was in force for 36 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jun 23, 2017, 11:54 AM CDT (16:54 UTC)
- Expired
- Jun 23, 2017, 12:30 PM CDT
- In force
- 36 min
- Issued by
- NWS Huntsville, AL
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Colbert County, AL, Franklin County, AL
The radar
The Columbus AFB radar (KGWX), 88 km from the middle of the area, began a volume at 16:59 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Birmingham, AL (KBMX), launched 12:00Z, 4.9 hours before the alert went out and 182 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 289 J/kg
- Mixed-layer CIN
- -32 J/kg
- Mixed-layer LCL
- 676 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 230 m²/s²
- 0-3 km storm-relative helicity
- 251 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 5.1
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Huntsville, AL wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 23, 9:47 AM CDT, 2 hours 7 minutes earlier.
Area forecast discussion, Jun 23, 9:47 AM CDT, 2 hours 7 minutes before
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</html>Hazardous weather outlook, Jun 23, 4:47 AM CDT, 7 hours 7 minutes before
Hazardous Weather Outlook National Weather Service Huntsville AL 447 AM CDT Fri Jun 23 2017 ALZ001>010-016-TNZ076-096-097-240100- Lauderdale-Colbert-Franklin AL-Lawrence-Limestone-Madison-Morgan- Marshall-Jackson-De Kalb-Cullman-Moore-Lincoln-Franklin TN- 447 AM CDT Fri Jun 23 2017 This Hazardous Weather Outlook is for north Alabama and portions of southern middle Tennessee. .DAY ONE...Today and Tonight... Thunderstorm coverage will increase across the Tennessee Valley into the evening, as the remnants of Tropical Depression Cindy approach the area. Some of the storms could become strong to severe in intensity, with damaging wind gusts and a few brief tornadoes the main threats. In addition, very high amounts of moisture associated with this system could result in very heavy rainfall, and a risk of flooding or flash flooding. Additional rainfall totals through late tonight should range from 1 to 1.5 inches, with locally higher amounts possible. .DAYS TWO THROUGH SEVEN...Saturday through Thursday... Thunderstorm coverage and intensity will diminish during Saturday, and should end Saturday evening, as a cold front moves across the region. Isolated thunderstorm chances return next Thursday, as Gulf moisture and instability return to the Tennessee Valley. .SPOTTER CALL TO ACTION STATEMENT... Activation of storm spotters and emergency management personnel may be needed today and tonight. RSB
In the hours before
Special weather statement, Jun 23, 11:51 AM CDT, 3 minutes before
Special Weather Statement
National Weather Service Huntsville AL
1151 AM CDT FRI JUN 23 2017
ALZ002-003-231715-
Franklin AL-Colbert AL-
1151 AM CDT FRI JUN 23 2017
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN COLBERT AND WESTERN
FRANKLIN COUNTIES UNTIL 1215 PM CDT...
At 1150 AM CDT, Doppler radar was tracking a strong thunderstorm near
Red Bay, moving northeast at 55 mph.
Wind gusts up to 50 mph will be possible with this storm.
Locations impacted include...
Red Bay, Vina, Cedar Creek Reservoir, Srygley Church, Halltown,
Pleasant Site, Dempsey, Crooked Oak and Little Bear Creek Reservoir.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Strong gusty winds will be capable of knocking down small tree limbs
along with other small unsecured items. Seek safe shelter until this
storm has passed.
&&
LAT...LON 3441 8816 3452 8815 3470 8790 3457 8773
3433 8809 3440 8817
TIME...MOT...LOC 1650Z 228DEG 46KT 3446 8808
70/DDThe office that day
Everything else NWS Huntsville, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 23, 12:24 AM CDT | Special Weather Statement | HUN | Marshall | 36 min |
| Jun 23, 11:51 AM CDT | Special Weather Statement | HUN | Franklin | 24 min |
| Jun 23, 12:26 PM CDT | Special Weather Statement | HUN | Colbert, Lauderdale | 34 min |
| Jun 23, 12:30 PM CDT | Special Weather Statement | HUN | Franklin | 30 min |
| Jun 23, 1:01 PM CDT | Special Weather Statement | HUN | Colbert, Franklin, Lauderdale | 29 min |
| Jun 23, 1:13 PM CDT | Severe Thunderstorm Warning | HUN | Colbert, Franklin, Lawrence | 32 min |
| Jun 23, 1:15 PM CDT | Flash Flood Warning | HUN | Colbert, Lauderdale, Lawrence | 6 hr |
| Jun 23, 1:21 PM CDT | Tornado Warning | HUN | Franklin, Lawrence | 24 min |
| Jun 23, 1:40 PM CDT | Severe Thunderstorm Warning | HUN | Lawrence, Limestone, Morgan | 35 min |
| Jun 23, 1:47 PM CDT | Tornado Warning | HUN | Lawrence | 28 min |
| Jun 23, 1:56 PM CDT | Severe Thunderstorm Warning | HUN | Cullman, Lawrence, Morgan | 34 min |
| Jun 23, 2:08 PM CDT | Severe Thunderstorm Warning | HUN | Lawrence, Limestone, Morgan | 19 min |
| Jun 23, 2:15 PM CDT | Severe Thunderstorm Warning | HUN | Limestone, Madison | 30 min |
| Jun 23, 2:44 PM CDT | Severe Thunderstorm Warning | HUN | Madison | 31 min |
| Jun 23, 2:47 PM CDT | Flash Flood Warning | HUN | Colbert, Franklin, Lawrence, Limestone, Morgan | 6 hr |
| Jun 23, 3:13 PM CDT | Special Weather Statement | HUN | Cullman | 32 min |
| Jun 23, 3:28 PM CDT | Special Weather Statement | HUN | Marshall | 32 min |
| Jun 23, 3:48 PM CDT | Areal Flood Warning | HUN | Madison | 6 hr |
| Jun 23, 1:52 PM CDT | Special Weather Statement | HUN | Lincoln | 23 min |
| Jun 23, 2:37 PM CDT | Special Weather Statement | HUN | Lincoln | 23 min |
| Jun 23, 3:14 PM CDT | Special Weather Statement | HUN | Franklin, Moore | 31 min |
Nearby
Severe Thunderstorm Warnings in Alabama, 2017Every severe thunderstorm warning in 2017
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.