Alert archive / Alabama / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 31, NWS Huntsville, AL

April 9, 2021Lawrence County, Limestone County, Alabama

NWS Huntsville, AL issued this severe thunderstorm warning at Apr 9, 2021, 1:41 PM CDT for Lawrence County, Limestone County, Alabama. It was in force for 34 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Apr 9, 2021, 1:41 PM CDT (18:41 UTC)
Expired: Apr 9, 2021, 2:15 PM CDT
In force: 34 min
Issued by: NWS Huntsville, AL
Area: Storm-based polygon
Hail: 1.25 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 18:45 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

Nashville Metro, TN (KBNA), launched 12:00Z, 6.7 hours before the alert went out and 162 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1982 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 184 m²/s²
0-3 km storm-relative helicity: 168 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

883 
WUUS54 KHUN 091841
SVRHUN
ALC079-083-091915-
/O.NEW.KHUN.SV.W.0031.210409T1841Z-210409T1915Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Huntsville AL
141 PM CDT Fri Apr 9 2021

The National Weather Service in Huntsville Alabama has issued a

* Severe Thunderstorm Warning for...
  Central Limestone County in north central Alabama...
  Northeastern Lawrence County in northwestern Alabama...

* Until 215 PM CDT.

* At 141 PM CDT, a severe thunderstorm was located over Courtland, or
  11 miles north of Moulton, moving northeast at 20 mph.

  HAZARD...60 mph wind gusts and half dollar size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Athens, Courtland, North Courtland, Hillsboro, Cartwright, Coxey,
  Chalybeate Springs, Cairo, Mt Rozell and Wheeler.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

&&

LAT...LON 3481 8689 3467 8708 3468 8710 3464 8711
      3453 8725 3463 8740 3476 8730 3475 8727
      3476 8726 3478 8728 3481 8722 3487 8721
      3496 8714
TIME...MOT...LOC 1841Z 219DEG 19KT 3464 8728 

HAIL...1.25IN
WIND...60MPH
 
$$

30

2 follow-up statements

569 
WWUS54 KHUN 091851
SVSHUN

Severe Weather Statement
National Weather Service Huntsville AL
151 PM CDT Fri Apr 9 2021

ALC079-083-091915-
/O.CON.KHUN.SV.W.0031.000000T0000Z-210409T1915Z/
Limestone AL-Lawrence AL-
151 PM CDT Fri Apr 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 215 PM CDT
FOR CENTRAL LIMESTONE AND NORTHEASTERN LAWRENCE COUNTIES...

At 150 PM CDT, a severe thunderstorm was located near Courtland, or
13 miles north of Moulton, moving northeast at 20 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Athens, Courtland, North Courtland, Hillsboro, Cartwright, Coxey,
Chalybeate Springs, Cairo, Mt Rozell and Wheeler.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3456 8723 3463 8734 3475 8728 3475 8727
      3476 8726 3477 8727 3479 8726 3481 8722
      3487 8721 3496 8714 3481 8689 3467 8708
      3468 8710 3464 8711
TIME...MOT...LOC 1850Z 218DEG 18KT 3467 8725 

HAIL...1.00IN
WIND...60MPH
 
$$

30

289 
WWUS54 KHUN 091907
SVSHUN

Severe Weather Statement
National Weather Service Huntsville AL
207 PM CDT Fri Apr 9 2021

ALC079-083-091917-
/O.EXP.KHUN.SV.W.0031.000000T0000Z-210409T1915Z/
Limestone AL-Lawrence AL-
207 PM CDT Fri Apr 9 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL LIMESTONE AND
NORTHEASTERN LAWRENCE COUNTIES WILL EXPIRE AT 215 PM CDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.

LAT...LON 3456 8723 3463 8734 3475 8728 3475 8727
      3476 8726 3477 8727 3479 8726 3481 8722
      3487 8721 3496 8714 3481 8689 3467 8708
      3468 8710 3464 8711
TIME...MOT...LOC 1907Z 219DEG 19KT 3473 8719 

$$

30

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 8, 7:27 PM CDT	River Flood Warning	HUN	Madison	18 hr
Apr 9, 1:04 PM CDT	Special Weather Statement	HUN	Cullman	56 min
Apr 9, 2:12 PM CDT	Special Weather Statement	HUN	Limestone	48 min
Apr 9, 2:23 PM CDT	Special Weather Statement	HUN	DeKalb	52 min
Apr 9, 2:33 PM CDT	Special Weather Statement	HUN	Cullman	42 min
Apr 9, 2:40 PM CDT	Severe Thunderstorm Warning	HUN	Cullman	25 min
Apr 9, 2:46 PM CDT	Severe Thunderstorm Warning	HUN	DeKalb	29 min
Apr 9, 3:09 PM CDT	Special Weather Statement	HUN	Madison	51 min
Apr 9, 3:45 PM CDT	Special Weather Statement	HUN	Cullman	45 min
Apr 9, 3:47 PM CDT	Special Weather Statement	HUN	Morgan	43 min
Apr 9, 3:52 PM CDT	Severe Thunderstorm Warning	HUN	Limestone	38 min
Apr 9, 4:10 PM CDT	Special Weather Statement	HUN	Limestone	35 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2021 Every severe thunderstorm warning in 2021

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.