Alert archive / Alabama / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 35, NWS Huntsville, AL

April 13, 2019Lawrence County, Limestone County, Alabama

NWS Huntsville, AL issued this severe thunderstorm warning at Apr 13, 2019, 7:52 PM CDT for Lawrence County, Limestone County, Alabama. It was in force for 23 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
Apr 13, 2019, 7:52 PM CDT (00:52 UTC)
Expired
Apr 13, 2019, 8:15 PM CDT
In force
23 min
Issued by
NWS Huntsville, AL
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Lawrence County, AL, Limestone County, AL

The radar

The Northeast Alabama radar (KHTX), 101 km from the middle of the area, began a volume at 00:54 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.

IssuedProductOfficeLasted
Apr 13, 7:11 PM CDTTornado WatchSPC11 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 0.9 hours before the alert went out and 169 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.

Skew-T log-pSkew-T log-p diagram, Birmingham, AL at 00:00Z on 2019-04-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 506 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Birmingham, AL at 00:00Z on 2019-04-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 240 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
506 J/kg
Mixed-layer CIN
-34 J/kg
Mixed-layer LCL
1458 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
240 m²/s²
0-3 km storm-relative helicity
428 m²/s²
Significant tornado parameter
0.6
Supercell composite
3.3

Open this sounding in Storm Lab

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 Apr 13, 7:23 PM CDT, 29 minutes earlier.

Area forecast discussion, Apr 13, 7:23 PM CDT, 29 minutes before
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Hazardous weather outlook, Apr 13, 6:36 PM CDT, 1 hour 16 minutes before
Hazardous Weather Outlook
National Weather Service Huntsville AL
636 PM CDT Sat Apr 13 2019

ALZ001>010-016-TNZ076-096-097-141200-
Lauderdale-Colbert-Franklin AL-Lawrence-Limestone-Madison-Morgan-
Marshall-Jackson-DeKalb-Cullman-Moore-Lincoln-Franklin TN-
636 PM CDT Sat Apr 13 2019

This Hazardous Weather Outlook is for north Alabama and portions of
southern middle Tennessee.

.DAY ONE...Tonight...

This evening, isolated thunderstorms will move northward along a warm
front into north Alabama and southern middle Tennessee, mainly along
and west of I-65. These storms will be capable of hail and gusty
winds. There is also a small risk of a tornado that cannot be ruled
out.

A line of strong to severe thunderstorms will move west to east
through the area late tonight into early Sunday morning, well ahead
of a strong cold front moving in from the west. Damaging winds, large
hail, and a few tornadoes will be possible as these clusters of
storms move east across the region.

.DAYS TWO THROUGH SEVEN...Sunday through Friday...

The line of strong to severe thunderstorms may still be across the
eastern half of the area near sunrise Sunday, but should be move out
of the area by mid-morning. Damaging winds, large hail, and a couple
of tornadoes will be possible.

Redevelopment of a few thunderstorms is possible Sunday afternoon
across far Northeast Alabama, as a cold front pushes eastward
through the region. Strong to severe thunderstorms are possible as
well with this activity. At this time, damaging winds and large hail
are the main threats.

Another round of thunderstorms are expected to affect the Tennessee
Valley during the later half of next week.

.SPOTTER INFORMATION STATEMENT...

Activation of storm spotters and emergency management personnel is
likely tonight.

In the hours before

Special weather statement, Apr 13, 7:06 PM CDT, 46 minutes before
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Special weather statement, Apr 13, 7:29 PM CDT, 23 minutes before
Special Weather Statement
National Weather Service Huntsville AL
729 PM CDT SAT APR 13 2019

ALZ016-140115-
Cullman AL-
729 PM CDT SAT APR 13 2019

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL CULLMAN COUNTY UNTIL 815
PM CDT...

At 729 PM CDT, Doppler radar was tracking a strong thunderstorm near
Warrior, or 13 miles northeast of Sumiton, moving north at 40 mph.

Pea size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Cullman, Hanceville, Good Hope, Holly Pond, Dodge City, Baldwin,
Vinemont, Baileyton, West Point and Garden City.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3429 8692 3427 8649 3420 8655 3419 8655
      3412 8660 3412 8663 3408 8669 3409 8669
      3408 8670 3405 8668 3406 8671 3403 8670
      3398 8676 3395 8685 3393 8686 3394 8688
      3392 8689 3391 8692 3388 8692 3387 8694
TIME...MOT...LOC 0029Z 194DEG 36KT 3386 8685

30
Special weather statement, Apr 13, 7:32 PM CDT, 20 minutes before
Special Weather Statement
National Weather Service Huntsville AL
732 PM CDT SAT APR 13 2019

ALZ004-007-140115-
Lawrence AL-Morgan AL-
732 PM CDT SAT APR 13 2019

...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL MORGAN AND LAWRENCE
COUNTIES UNTIL 815 PM CDT...

At 731 PM CDT, Doppler radar was tracking a strong thunderstorm over
Ashridge, or 11 miles east of Haleyville, moving north at 40 mph.

Nickel size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Decatur, Moulton, Trinity, Hillsboro, Mt Hope, Chalybeate Springs,
Speake, Ne Smith, Caddo and Wren.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike several miles away from a thunderstorm. Seek a
safe shelter inside a building or vehicle.

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 3430 8744 3431 8751 3465 8746 3465 8745
      3466 8744 3462 8702 3430 8717
TIME...MOT...LOC 0031Z 192DEG 43KT 3423 8742

30

The office that day

Everything else NWS Huntsville, AL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 13, 7:06 PM CDTSpecial Weather StatementHUNLawrence39 min
Apr 13, 7:29 PM CDTSpecial Weather StatementHUNCullman46 min
Apr 13, 7:32 PM CDTSpecial Weather StatementHUNLawrence43 min
Apr 13, 8:10 PM CDTSpecial Weather StatementHUNLimestone35 min
Apr 13, 8:14 PM CDTSevere Thunderstorm WarningHUNLauderdale, Lawrence, Limestone31 min
Apr 13, 8:39 PM CDTSevere Thunderstorm WarningHUNLimestone12 min
Apr 13, 11:49 PM CDTSevere Thunderstorm WarningHUNColbert, Franklin41 min
Apr 13, 11:54 PM CDTTornado WarningHUNColbert, Franklin21 min
Apr 14, 12:23 AM CDTTornado WarningHUNColbert, Franklin22 min
Apr 14, 12:32 AM CDTSevere Thunderstorm WarningHUNColbert, Franklin, Lauderdale43 min
Apr 14, 12:57 AM CDTTornado WarningHUNColbert, Franklin17 min
Apr 14, 1:13 AM CDTSevere Thunderstorm WarningHUNColbert, Franklin, Lauderdale47 min
Apr 14, 1:38 AM CDTFlash Flood WarningHUNColbert, Franklin3 hr
Apr 14, 1:51 AM CDTSpecial Weather StatementHUNLawrence39 min
Apr 14, 2:06 AM CDTSevere Thunderstorm WarningHUNLauderdale, Lawrence, Limestone39 min
Apr 14, 2:16 AM CDTTornado WarningHUNLauderdale, Limestone14 min
Apr 14, 2:34 AM CDTSevere Thunderstorm WarningHUNLawrence, Morgan26 min
Apr 14, 2:53 AM CDTSevere Thunderstorm WarningHUNCullman, Lawrence, Limestone, Morgan37 min
Apr 14, 3:09 AM CDTTornado WarningHUNCullman, Morgan15 min
Apr 14, 3:27 AM CDTSevere Thunderstorm WarningHUNCullman, Morgan48 min
Apr 14, 3:31 AM CDTSpecial Weather StatementHUNLimestone, Madison44 min
Apr 14, 4:02 AM CDTSpecial Weather StatementHUNMarshall43 min
Apr 14, 4:22 AM CDTSpecial Weather StatementHUNJackson, Madison38 min
Apr 14, 4:46 AM CDTSevere Thunderstorm WarningHUNJackson29 min
Apr 14, 5:41 AM CDTSpecial Weather StatementHUNJackson34 min
Apr 14, 5:53 AM CDTSpecial Weather StatementHUNDeKalb, Jackson37 min
Apr 14, 6:37 AM CDTSevere Thunderstorm WarningHUNDeKalb, Jackson38 min
Apr 14, 8:54 AM CDTWind AdvisoryHUNColbert, Cullman, DeKalb, Franklin, Jackson, Lauderdale and 5 more12 hr
Apr 14, 11:33 AM CDTRiver Flood WarningHUNJackson, Madison, Marshall47 hr
Apr 13, 10:23 PM CDTSpecial Weather StatementHUNFranklin37 min
Apr 14, 4:59 AM CDTSpecial Weather StatementHUNFranklin31 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2019Every severe thunderstorm warning in 2019

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.