Alert archive / Alabama / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 49, NWS Huntsville, AL

May 6, 2021Colbert County, Lauderdale County, Alabama

NWS Huntsville, AL issued this severe thunderstorm warning at May 6, 2021, 4:56 PM CDT for Colbert County, Lauderdale County, Alabama. It was in force for 49 min. 6 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: May 6, 2021, 4:56 PM CDT (21:56 UTC)
Expired: May 6, 2021, 5:45 PM CDT
In force: 49 min
Issued by: NWS Huntsville, AL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Colbert County, AL, Lauderdale County, AL

The radar

The Columbus AFB radar (KGWX), 113 km from the middle of the area, began a volume at 21:58 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
May 6, 5:20 PM CDT	TSTM WND DMG	6 Wnw Underwood-Petersv, AL	LARGE LIMBS BLOCKING THE INTERSECTION OF COUNTY ROAD 6 AND COUNTY ROAD 15.
May 6, 5:21 PM CDT	TSTM WND DMG	4 Ssw Waterloo, AL	TREE DOWN AT THE RIVERTON COMMUNITY RV PARK.
May 6, 5:24 PM CDT	TSTM WND DMG	4 Wnw Underwood-Petersv, AL	TREES DOWN ON COUNTY ROAD 281. TIME ESTIMATED FROM RADAR.
May 6, 5:35 PM CDT	TSTM WND DMG	1 Nnw Florence, AL	SHINGLES OFF A HOUSE NEAR THE INTERSECTION OF HELTON DR. AND COX CREEK PKWY. TIME ESTIMATED FROM RADAR.
May 6, 5:37 PM CDT	TSTM WND DMG	Cherokee, AL	MULTIPLE TREES DOWN TANGLED WITH POWER LINES.
May 6, 5:41 PM CDT	TSTM WND DMG	7 N Killen, AL	LARGE TREE LIMBS DOWN IN THE GREEN HILL AREA.

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

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 9.9 hours before the alert went out and 184 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: 1719 m above ground
0-6 km bulk shear: 65 kt
0-1 km storm-relative helicity: -90 m²/s²
0-3 km storm-relative helicity: -71 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

613 
WUUS54 KHUN 062156
SVRHUN
ALC033-077-062245-
/O.NEW.KHUN.SV.W.0049.210506T2156Z-210506T2245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Huntsville AL
456 PM CDT Thu May 6 2021

The National Weather Service in Huntsville Alabama has issued a

* Severe Thunderstorm Warning for...
  Lauderdale County in northwestern Alabama...
  Western Colbert County in northwestern Alabama...

* Until 545 PM CDT.

* At 455 PM CDT, severe thunderstorms were located along a line
  extending from 8 miles southwest of Hohenwald to near Walnut Grove
  to 6 miles east of Ripley, moving southeast at 35 mph.

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

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Florence, Muscle Shoals, Sheffield, Tuscumbia, Killen, Cherokee,
  St. Florian, Underwood-Petersville, Waterloo and Green Hill.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3500 8737 3477 8765 3458 8807 3458 8814
      3489 8810 3492 8816 3501 8820
TIME...MOT...LOC 2155Z 310DEG 30KT 3545 8764 3507 8809 3475 8882 

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

25

2 follow-up statements

156 
WWUS54 KHUN 062235
SVSHUN

Severe Weather Statement
National Weather Service Huntsville AL
535 PM CDT Thu May 6 2021

ALC033-077-062245-
/O.CON.KHUN.SV.W.0049.000000T0000Z-210506T2245Z/
Lauderdale AL-Colbert AL-
535 PM CDT Thu May 6 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CDT
FOR CENTRAL LAUDERDALE AND SOUTHWESTERN COLBERT COUNTIES...

At 534 PM CDT, severe thunderstorms were located along a line
extending from Lawrenceburg to 6 miles west of Underwood-Petersville
to near Wheeler, moving southeast at 45 mph.

HAZARD...60 mph wind gusts.

SOURCE...Emergency management.

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

Locations impacted include...
Florence, Muscle Shoals, Sheffield, Tuscumbia, Killen, Cherokee, St.
Florian, Underwood-Petersville, Green Hill and Mt Hester.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

This is a DANGEROUS SITUATION. These storms are producing widespread 
wind damage across Lauderdale and Colbert Counties. SEEK SHELTER NOW 
inside a sturdy structure and stay away from windows.
 
&&

LAT...LON 3500 8737 3477 8765 3458 8807 3458 8814
      3469 8813 3485 8784 3500 8760
TIME...MOT...LOC 2234Z 310DEG 30KT 3526 8736 3488 8781 3456 8854 

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

25

967 
WWUS54 KHUN 062242
SVSHUN

Severe Weather Statement
National Weather Service Huntsville AL
542 PM CDT Thu May 6 2021

ALC033-077-062251-
/O.EXP.KHUN.SV.W.0049.000000T0000Z-210506T2245Z/
Lauderdale AL-Colbert AL-
542 PM CDT Thu May 6 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL LAUDERDALE AND
SOUTHWESTERN COLBERT COUNTIES WILL EXPIRE AT 545 PM CDT...
    
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Huntsville Alabama.

LAT...LON 3500 8737 3477 8765 3458 8807 3458 8814
      3469 8813 3485 8784 3500 8760
TIME...MOT...LOC 2241Z 310DEG 30KT 3524 8733 3486 8778 3454 8851 

$$

25

The office that day

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

Issued	Product	Office	Counties	Lasted
May 6, 5:31 PM CDT	Severe Thunderstorm Warning	HUN	Colbert, Franklin, Lauderdale, Lawrence, Limestone, Madison and 1 more	59 min
May 6, 6:27 PM CDT	Severe Thunderstorm Warning	HUN	Cullman, Jackson, Lawrence, Limestone, Madison, Marshall and 1 more	48 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.