Alert archive / Alabama / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 21, NWS Huntsville, AL

March 28, 2021Colbert County, Franklin County, Lawrence County, Alabama

NWS Huntsville, AL issued this severe thunderstorm warning at Mar 28, 2021, 3:09 AM CDT for Colbert County, Franklin County, Lawrence County, Alabama. It was in force for 36 min. 4 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Mar 28, 2021, 3:09 AM CDT (08:09 UTC)
Expired: Mar 28, 2021, 3:45 AM CDT
In force: 36 min
Issued by: NWS Huntsville, AL
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 60.0 mph

Counties Colbert County, AL, Franklin County, AL, Lawrence County, AL

The radar

The Columbus AFB radar (KGWX), 97 km from the middle of the area, began a volume at 08:12 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.

What was reported inside it

Time	Report	Where	Remark
Mar 28, 3:10 AM CDT	TSTM WND DMG	1 Ne Russellville, AL	TREE DOWN ON HOUSE.
Mar 28, 3:10 AM CDT	TSTM WND DMG	2 Sse Russellville, AL	REPORT OF SOME STRUCTURAL DAMAGE TO A BUSINESS ALONG HWY 24 IN RUSSELLVILLE.
Mar 28, 3:15 AM CDT	TSTM WND DMG	8 E Russellville, AL	NUMEROUS TREES DOWN NEAR HWY 24.
Mar 28, 3:28 AM CDT	TSTM WND GST 58	9 W Moulton, AL	A 58 MPH WIND GUST WAS REPORTED AT HIGHWAY 101 AT THE INTERSECTION WITH HIGHWAY 24.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

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 27, 11:27 PM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 8.2 hours before the alert went out and 171 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: 643 J/kg
Mixed-layer CIN: -22 J/kg
Mixed-layer LCL: 1359 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 126 m²/s²
0-3 km storm-relative helicity: 152 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 3.7

Open this sounding in Storm Lab

The text

As transmitted.

512 
WUUS54 KHUN 280809
SVRHUN
ALC033-059-079-280845-
/O.NEW.KHUN.SV.W.0021.210328T0809Z-210328T0845Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Huntsville AL
309 AM CDT Sun Mar 28 2021

The National Weather Service in Huntsville Alabama has issued a

* Severe Thunderstorm Warning for...
  Southeastern Colbert County in northwestern Alabama...
  Eastern Franklin County in northwestern Alabama...
  Western Lawrence County in northwestern Alabama...

* Until 345 AM CDT.

* At 308 AM CDT, a severe thunderstorm was located near Russellville,
  moving east at 60 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...
  Russellville, Moulton, Phil Campbell, Town Creek, Littleville,
  Leighton, Courtland, Belgreen, North Courtland and Posey Loop.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 600 AM CDT for north central
and northwestern Alabama.

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

&&

LAT...LON 3470 8787 3473 8725 3430 8726 3431 8787
TIME...MOT...LOC 0808Z 265DEG 54KT 3445 8773 

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

25

2 follow-up statements

126 
WWUS54 KHUN 280828
SVSHUN

Severe Weather Statement
National Weather Service Huntsville AL
328 AM CDT Sun Mar 28 2021

ALC033-280837-
/O.CAN.KHUN.SV.W.0021.000000T0000Z-210328T0845Z/
Colbert AL-
328 AM CDT Sun Mar 28 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN COLBERT COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 600 AM CDT for north central
and northwestern Alabama.

LAT...LON 3447 8760 3457 8755 3457 8752 3460 8751
      3463 8748 3465 8748 3465 8745 3470 8745
      3471 8742 3472 8743 3473 8725 3430 8726
      3431 8773
TIME...MOT...LOC 0827Z 265DEG 54KT 3448 8738 

$$

ALC059-079-280845-
/O.CON.KHUN.SV.W.0021.000000T0000Z-210328T0845Z/
Franklin AL-Lawrence AL-
328 AM CDT Sun Mar 28 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 AM CDT
FOR SOUTHEASTERN FRANKLIN AND WESTERN LAWRENCE COUNTIES...

At 327 AM CDT, a severe thunderstorm was located near Moulton, moving
east at 60 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Moulton, Phil Campbell, Town Creek, Courtland, North Courtland,
Newburg, Hatton, Mt Hope, Ne Smith and Bankhead National Forest.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 600 AM CDT for north central
and northwestern Alabama.

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

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 3447 8760 3457 8755 3457 8752 3460 8751
      3463 8748 3465 8748 3465 8745 3470 8745
      3471 8742 3472 8743 3473 8725 3430 8726
      3431 8773
TIME...MOT...LOC 0827Z 265DEG 54KT 3448 8738 

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
 
$$

25

525 
WWUS54 KHUN 280843
SVSHUN

Severe Weather Statement
National Weather Service Huntsville AL
343 AM CDT Sun Mar 28 2021

ALC059-079-280851-
/O.EXP.KHUN.SV.W.0021.000000T0000Z-210328T0845Z/
Franklin AL-Lawrence AL-
343 AM CDT Sun Mar 28 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN FRANKLIN AND
WESTERN LAWRENCE COUNTIES WILL EXPIRE AT 345 AM CDT...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.

A Tornado Watch remains in effect until 600 AM CDT for north central
and northwestern Alabama.

Remember, a Severe Thunderstorm Warning still remains in effect for
eastern Lawrence County until 400 AM. 

LAT...LON 3447 8760 3457 8755 3457 8752 3460 8751
      3463 8748 3465 8748 3465 8745 3470 8745
      3471 8742 3472 8743 3473 8725 3430 8726
      3431 8773
TIME...MOT...LOC 0841Z 265DEG 54KT 3453 8727 

$$

25

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 28, 12:31 AM CDT	Severe Thunderstorm Warning	HUN	Colbert, Lauderdale	44 min
Mar 28, 1:13 AM CDT	Special Weather Statement	HUN	Lauderdale	47 min
Mar 28, 1:52 AM CDT	Flash Flood Warning	HUN	Lauderdale	3 hr
Mar 28, 2:39 AM CDT	Special Weather Statement	HUN	Colbert	51 min
Mar 28, 2:45 AM CDT	Special Weather Statement	HUN	Franklin	45 min
Mar 28, 3:34 AM CDT	Severe Thunderstorm Warning	HUN	Lawrence, Limestone, Morgan	26 min
Mar 28, 3:58 AM CDT	Severe Thunderstorm Warning	HUN	Jackson, Limestone, Madison, Morgan	47 min
Mar 28, 4:26 AM CDT	Severe Thunderstorm Warning	HUN	Jackson	34 min
Mar 28, 4:46 AM CDT	Severe Thunderstorm Warning	HUN	Jackson, Limestone, Madison, Morgan	44 min
Mar 28, 5:02 AM CDT	Severe Thunderstorm Warning	HUN	Cullman	28 min
Mar 28, 5:21 AM CDT	Severe Thunderstorm Warning	HUN	Jackson	24 min
Mar 28, 5:30 AM CDT	Severe Thunderstorm Warning	HUN	Cullman	30 min
Mar 28, 5:41 AM CDT	Areal Flood Warning	HUN	Madison	3 hr
Mar 28, 5:57 AM CDT	Severe Thunderstorm Warning	HUN	DeKalb, Marshall	33 min
Mar 28, 6:26 AM CDT	Special Weather Statement	HUN	DeKalb	34 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.