Alert archive / Alabama / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 77, NWS Huntsville, AL
NWS Huntsville, AL issued this severe thunderstorm warning at Jul 12, 2020, 11:02 AM CDT for Cullman County, Lawrence County, Morgan County, Alabama. It was in force for 28 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
- Jul 12, 2020, 11:02 AM CDT (16:02 UTC)
- Expired
- Jul 12, 2020, 11:30 AM CDT
- In force
- 28 min
- Issued by
- NWS Huntsville, AL
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Cullman County, AL, Lawrence County, AL, Morgan County, AL
The radar
The Northeast Alabama radar (KHTX), 105 km from the middle of the area, began a volume at 16:05 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, 4.0 hours before the alert went out and 134 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
- 43 J/kg
- Mixed-layer CIN
- -299 J/kg
- Mixed-layer LCL
- 1793 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 37 m²/s²
- 0-3 km storm-relative helicity
- 68 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Jul 12, 10:07 AM CDT, 55 minutes earlier.
Area forecast discussion, Jul 12, 10:07 AM CDT, 55 minutes before
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</html>Hazardous weather outlook, Jul 12, 3:05 AM CDT, 7 hours 57 minutes before
Hazardous Weather Outlook National Weather Service Huntsville AL 305 AM CDT Sun Jul 12 2020 ALZ001>010-016-TNZ076-096-097-122315- Lauderdale-Colbert-Franklin AL-Lawrence-Limestone-Madison-Morgan- Marshall-Jackson-DeKalb-Cullman-Moore-Lincoln-Franklin TN- 305 AM CDT Sun Jul 12 2020 This Hazardous Weather Outlook is for north central Alabama, northeast Alabama, northwest Alabama and southern middle Tennessee. .DAY ONE...Today. Chances for thunderstorms will increase beginning after sunrise, especially for counties in northwest Alabama and southern Middle Tennessee. A few strong to marginally severe thunderstorms will be possible, with wind gusts in the 50 to 60 MPH range, hail up to the size of quarters, and frequent lightning the main hazards. After this morning round, additional storm development will be possible through the afternoon as a weak cold front pushes south toward the region. .DAYS TWO THROUGH SEVEN...Sunday through Friday. Heat index values may reach or exceed 105 degrees each afternoon from Wednesday through Friday, especially across portions of northwest Alabama. Widely scattered afternoon thunderstorms will be possible during this period, as well. .SPOTTER INFORMATION STATEMENT... Formal activation of storm spotters and emergency management personnel is not anticipated at this time. However...timely reports of severe thunderstorm damage will be greatly appreciated. Please relay any information about observed severe weather to the NWS while following all local, state, and CDC guidelines.
In the hours before
Special weather statement, Jul 12, 8:41 AM CDT, 2 hours 21 minutes before
Special Weather Statement National Weather Service Huntsville AL 841 AM CDT Sun Jul 12 2020 ALZ001-004-005-121415- Lawrence AL-Lauderdale AL-Limestone AL- 841 AM CDT Sun Jul 12 2020 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN LAUDERDALE... NORTHWESTERN LIMESTONE AND NORTH CENTRAL LAWRENCE COUNTIES UNTIL 915 AM CDT... At 841 AM CDT, Doppler radar was tracking a strong thunderstorm near Lexington, or 18 miles northwest of Athens, moving southeast at 25 mph. Winds in excess of 30 mph will be possible with this storm. Locations impacted include... Rogersville, Lexington, Anderson, Lester, Good Springs, Cartwright, Coxey, Oliver, Whitehead and Cairo. 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. Very heavy rainfall is also occurring with this storm, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 3500 8713 3486 8702 3474 8725 3500 8744 TIME...MOT...LOC 1341Z 329DEG 22KT 3495 8725 McCoy
Special weather statement, Jul 12, 8:49 AM CDT, 2 hours 13 minutes before
Special Weather Statement National Weather Service Huntsville AL 849 AM CDT Sun Jul 12 2020 ALZ001-002-004-121430- Lawrence AL-Lauderdale AL-Colbert AL- 849 AM CDT Sun Jul 12 2020 ...SIGNIFICANT WEATHER ADVISORY FOR LAUDERDALE...CENTRAL COLBERT AND NORTH CENTRAL LAWRENCE COUNTIES UNTIL 930 AM CDT... At 848 AM CDT, Doppler radar was tracking a strong thunderstorm 8 miles north of St. Florian, or 13 miles northeast of Florence, moving southeast at 40 mph. Winds in excess of 40 mph and pea size hail will be possible with this storm. Locations impacted include... Florence, Muscle Shoals, Sheffield, Tuscumbia, Killen, Cherokee, Leighton, St. Florian, Underwood-Petersville and Green Hill. 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. Heavy rainfall is also occurring with this storm, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 3501 8803 3500 8743 3469 8722 3471 8803 TIME...MOT...LOC 1348Z 335DEG 34KT 3498 8758 McCoy
Special weather statement, Jul 12, 9:14 AM CDT, 1 hour 48 minutes before
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Everything else NWS Huntsville, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 12, 7:52 AM CDT | Special Weather Statement | HUN | Limestone | 38 min |
| Jul 12, 8:00 AM CDT | Special Weather Statement | HUN | Colbert | 45 min |
| Jul 12, 8:41 AM CDT | Special Weather Statement | HUN | Limestone | 34 min |
| Jul 12, 8:49 AM CDT | Special Weather Statement | HUN | Lauderdale | 41 min |
| Jul 12, 9:14 AM CDT | Special Weather Statement | HUN | Colbert, Lauderdale | 46 min |
| Jul 12, 9:35 AM CDT | Severe Thunderstorm Warning | HUN | Colbert, Lauderdale | 25 min |
| Jul 12, 9:41 AM CDT | Severe Thunderstorm Warning | HUN | Colbert, Lawrence | 34 min |
| Jul 12, 9:55 AM CDT | Severe Thunderstorm Warning | HUN | Colbert, Franklin, Lawrence | 35 min |
| Jul 12, 9:59 AM CDT | Severe Thunderstorm Warning | HUN | Colbert, Lauderdale | 31 min |
| Jul 12, 10:16 AM CDT | Areal Flood Warning | HUN | Colbert, Lauderdale | 3 hr |
| Jul 12, 10:21 AM CDT | Special Weather Statement | HUN | Lawrence, Morgan | 39 min |
| Jul 12, 10:29 AM CDT | Special Weather Statement | HUN | Colbert, Lauderdale | 46 min |
| Jul 12, 10:45 AM CDT | Severe Thunderstorm Warning | HUN | Franklin, Lawrence | 30 min |
| Jul 12, 10:47 AM CDT | Special Weather Statement | HUN | Colbert, Franklin | 43 min |
| Jul 12, 11:12 AM CDT | Severe Thunderstorm Warning | HUN | Colbert, Franklin | 33 min |
| Jul 12, 11:30 AM CDT | Severe Thunderstorm Warning | HUN | Cullman | 30 min |
| Jul 12, 11:51 AM CDT | Areal Flood Warning | HUN | Cullman | 3 hr |
| Jul 12, 12:05 PM CDT | Special Weather Statement | HUN | Cullman | 40 min |
| Jul 12, 12:20 PM CDT | Areal Flood Warning | HUN | Franklin, Lawrence | 3 hr |
Nearby
Severe Thunderstorm Warnings in Alabama, 2020Every severe thunderstorm warning in 2020
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.