Alert archive / Alabama / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 13, NWS Huntsville, AL

March 27, 2021Lawrence County, Alabama

NWS Huntsville, AL issued this severe thunderstorm warning at Mar 27, 2021, 4:36 PM CDT for Lawrence County, Alabama. It was in force for 24 min. 2 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 27, 2021, 4:36 PM CDT (21:36 UTC)
Expired: Mar 27, 2021, 5:00 PM CDT
In force: 24 min
Issued by: NWS Huntsville, AL
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

County Lawrence County, AL

The radar

The Columbus AFB radar (KGWX), 108 km from the middle of the area, began a volume at 21:39 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 27, 4:53 PM CDT	HAIL 0.7	1 W Moulton, AL	DIME-SIZED HAIL REPORTED AT THE LAWRENCE COUNTY EMA OFFICE.
Mar 27, 5:00 PM CDT	TSTM WND GST 40	3 E Moulton, AL	40 MPH WIND GUST MEASURED 3 MILES EAST OF MOULTON, AL.

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

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 9.6 hours before the alert went out and 150 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: 1085 J/kg
Mixed-layer CIN: -47 J/kg
Mixed-layer LCL: 610 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 164 m²/s²
0-3 km storm-relative helicity: 219 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 5.2

Open this sounding in Storm Lab

The text

As transmitted.

563 
WUUS54 KHUN 272136
SVRHUN
ALC079-272200-
/O.NEW.KHUN.SV.W.0013.210327T2136Z-210327T2200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Huntsville AL
436 PM CDT Sat Mar 27 2021

The National Weather Service in Huntsville Alabama has issued a

* Severe Thunderstorm Warning for...
  Southern Lawrence County in northwestern Alabama...

* Until 500 PM CDT.

* At 436 PM CDT, a severe thunderstorm was located 10 miles 
  southwest of Moulton, moving northeast at 25 mph.

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

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Moulton, Chalybeate Springs, Speake, Wren, Landersville, Mt Hope
  and Bankhead National Forest.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 900 PM CDT for north central
and northwestern Alabama.

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

&&

LAT...LON 3438 8750 3443 8753 3461 8722 3450 8716
      3439 8711 3437 8748
TIME...MOT...LOC 2134Z 241DEG 21KT 3440 8745 

TORNADO...POSSIBLE
HAIL...0.75IN
WIND...60MPH
 
$$

KTW

1 follow-up statement

869 
WWUS54 KHUN 272149
SVSHUN

Severe Weather Statement
National Weather Service Huntsville AL
449 PM CDT Sat Mar 27 2021

ALC079-272200-
/O.CON.KHUN.SV.W.0013.000000T0000Z-210327T2200Z/
Lawrence AL-
449 PM CDT Sat Mar 27 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM CDT
FOR SOUTHERN LAWRENCE COUNTY...

At 448 PM CDT, a severe thunderstorm was located near Moulton, moving
northeast at 25 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...
Moulton, Speake, Chalybeate Springs, Wren, Landersville and Bankhead
National Forest.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 900 PM CDT for north central
and northwestern Alabama.

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

&&

LAT...LON 3441 8741 3445 8744 3459 8722 3450 8716
      3441 8712 3439 8739
TIME...MOT...LOC 2148Z 241DEG 21KT 3444 8736 

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

KTW

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 27, 1:28 AM CDT	Flash Flood Watch	HUN	Colbert, Franklin, Jackson, Lauderdale, Lawrence, Limestone and 2 more	31 hr
Mar 27, 2:47 AM CDT	Special Weather Statement	HUN	Colbert	28 min
Mar 27, 3:05 AM CDT	Special Weather Statement	HUN	Jackson	40 min
Mar 27, 3:14 AM CDT	Special Weather Statement	HUN	Lauderdale	46 min
Mar 27, 3:40 AM CDT	Special Weather Statement	HUN	Jackson	35 min
Mar 27, 3:52 AM CDT	Severe Thunderstorm Warning	HUN	Jackson	38 min
Mar 27, 10:02 AM CDT	Special Weather Statement	HUN	Lauderdale	28 min
Mar 27, 10:57 AM CDT	Special Weather Statement	HUN	Lauderdale	18 min
Mar 27, 4:22 PM CDT	Special Weather Statement	HUN	Lawrence	23 min
Mar 27, 4:28 PM CDT	Severe Thunderstorm Warning	HUN	Cullman	47 min
Mar 27, 4:57 PM CDT	Severe Thunderstorm Warning	HUN	Lawrence, Morgan	18 min
Mar 27, 5:14 PM CDT	Severe Thunderstorm Warning	HUN	Cullman, Madison, Marshall, Morgan	46 min
Mar 27, 5:17 PM CDT	Special Weather Statement	HUN	Morgan	28 min
Mar 27, 5:44 PM CDT	Special Weather Statement	HUN	Morgan	46 min
Mar 27, 5:54 PM CDT	Severe Thunderstorm Warning	HUN	Jackson, Madison, Marshall	36 min
Mar 27, 6:14 PM CDT	Special Weather Statement	HUN	Madison	16 min
Mar 27, 6:24 PM CDT	Severe Thunderstorm Warning	HUN	Jackson	31 min
Mar 27, 6:29 PM CDT	Severe Thunderstorm Warning	HUN	Madison	16 min
Mar 27, 6:43 PM CDT	Severe Thunderstorm Warning	HUN	Jackson, Madison	17 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.