Alert archive / Tennessee / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 31, NWS Huntsville, AL
NWS Huntsville, AL issued this severe thunderstorm warning at Mar 29, 2020, 2:42 AM CDT for Franklin County, Lincoln County, Moore County, Tennessee. It was in force for 33 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
- Mar 29, 2020, 2:42 AM CDT (07:42 UTC)
- Expired
- Mar 29, 2020, 3:15 AM CDT
- In force
- 33 min
- Issued by
- NWS Huntsville, AL
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Franklin County, TN, Lincoln County, TN, Moore County, TN
The radar
The Northeast Alabama radar (KHTX), 38 km from the middle of the area, began a volume at 07:46 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Mar 28, 9:58 PM CDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Nashville Metro, TN (KBNA), launched 00:00Z, 7.7 hours before the alert went out and 107 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
- 251 J/kg
- Mixed-layer CIN
- -107 J/kg
- Mixed-layer LCL
- 1430 m above ground
- 0-6 km bulk shear
- 71 kt
- 0-1 km storm-relative helicity
- 132 m²/s²
- 0-3 km storm-relative helicity
- 206 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.5
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 Mar 29, 2:38 AM CDT, 4 minutes earlier.
Area forecast discussion, Mar 29, 2:38 AM CDT, 4 minutes before
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Hazardous Weather Outlook National Weather Service Huntsville AL 108 AM CDT Sun Mar 29 2020 ALZ001>010-016-TNZ076-096-097-290930- Lauderdale-Colbert-Franklin AL-Lawrence-Limestone-Madison-Morgan- Marshall-Jackson-DeKalb-Cullman-Moore-Lincoln-Franklin TN- 108 AM CDT Sun Mar 29 2020 This Hazardous Weather Outlook is for north Alabama and portions of southern middle Tennessee. .DAY ONE...Tonight... A line of strong thunderstorms will move across the Tennessee Valley late tonight. Some of these storms may produce severe weather, especially across Northwest Alabama. Damaging winds and quarter size hail will be the main threats with the strongest activity. A tornado or two cannot be ruled out. .DAYS TWO THROUGH SEVEN...Sunday through Friday... A low pressure system moving through the region will bring moderate to heavy rainfall to the region Monday night through Tuesday. This rainfall could result in rises along area creeks and rivers and cause minor areal flooding. .SPOTTER CALL TO ACTION STATEMENT... Activation of storm spotters and emergency management personnel is possible late tonight.
In the hours before
Special weather statement, Mar 29, 1:25 AM CDT, 1 hour 17 minutes before
Special Weather Statement
National Weather Service Huntsville AL
125 AM CDT Sun Mar 29 2020
TNZ076-096-290645-
Moore TN-Lincoln TN-
125 AM CDT Sun Mar 29 2020
...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL MOORE AND
NORTHWESTERN LINCOLN COUNTIES UNTIL 145 AM CDT...
At 124 AM CDT, Doppler radar was tracking a strong thunderstorm 10
miles southwest of Petersburg, or 13 miles east of Pulaski, moving
northeast at 85 mph.
Penny size hail and winds in excess of 30 mph will be possible with
this storm.
Locations impacted include...
Petersburg, Mcburg, Chestnut Ridge and Boonshill.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.
&&
LAT...LON 3536 8654 3535 8654 3536 8651 3536 8648
3533 8647 3515 8683 3526 8683 3525 8675
3531 8668 3533 8660 3536 8660 3537 8659
TIME...MOT...LOC 0624Z 236DEG 73KT 3525 8681
25Local storm report, Mar 29, 2:16 AM CDT, 26 minutes before
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</html>Local storm report, Mar 29, 2:21 AM CDT, 21 minutes before
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</html>Local storm report, Mar 29, 2:22 AM CDT, 20 minutes before
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</html>Local storm report, Mar 29, 2:23 AM CDT, 19 minutes before
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</html>Local storm report, Mar 29, 2:32 AM CDT, 10 minutes before
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</html>The office that day
Everything else NWS Huntsville, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 29, 12:03 AM CDT | Special Weather Statement | HUN | Lauderdale | 27 min |
| Mar 29, 12:26 AM CDT | Special Weather Statement | HUN | Colbert, Franklin, Lauderdale | 49 min |
| Mar 29, 12:45 AM CDT | Severe Thunderstorm Warning | HUN | Lauderdale | 30 min |
| Mar 29, 1:02 AM CDT | Severe Thunderstorm Warning | HUN | Colbert, Franklin | 28 min |
| Mar 29, 1:37 AM CDT | Severe Thunderstorm Warning | HUN | Colbert, Lauderdale, Lawrence, Limestone | 38 min |
| Mar 29, 2:20 AM CDT | Severe Thunderstorm Warning | HUN | Limestone, Madison | 25 min |
| Mar 29, 2:52 AM CDT | Severe Thunderstorm Warning | HUN | Cullman, Lawrence, Limestone, Madison, Marshall, Morgan | 38 min |
| Mar 29, 3:20 AM CDT | Special Weather Statement | HUN | Jackson | 40 min |
| Mar 29, 3:30 AM CDT | Special Weather Statement | HUN | Marshall | 45 min |
| Mar 29, 1:25 AM CDT | Special Weather Statement | HUN | Lincoln | 20 min |
| Mar 29, 1:33 AM CDT | Severe Thunderstorm Warning | HUN | Lincoln, Moore | 27 min |
Nearby
Severe Thunderstorm Warnings in Tennessee, 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.