Alert archive / Alabama / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 52, NWS Huntsville, AL

May 6, 20217 counties in Alabama

NWS Huntsville, AL issued this severe thunderstorm warning at May 6, 2021, 6:27 PM CDT for 7 counties in Alabama. It was in force for 48 min. 11 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, 6:27 PM CDT (23:27 UTC)
Expired: May 6, 2021, 7:15 PM CDT
In force: 48 min
Issued by: NWS Huntsville, AL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Cullman County, AL, Jackson County, AL, Lawrence County, AL, Limestone County, AL, Madison County, AL, Marshall County, AL, Morgan County, AL

The radar

The Northeast Alabama radar (KHTX), 100 km from the middle of the area, began a volume at 23:27 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, 6:28 PM CDT	TSTM WND GST 48	4 Wnw Mooresville, AL
May 6, 6:36 PM CDT	TSTM WND DMG	3 W Madison, AL	TREE DOWN BLOCKING THE ROAD NEAR THE INTERSECTION OF HATLEY LN. AND BURGREEN RD.
May 6, 6:39 PM CDT	TSTM WND DMG	1 Ne Madison, AL	TREE DOWN NEAR THE INTERSECTION OF PLAZA DR. AND HUGHES DR. TIME ESTIMATED FROM RADAR.
May 6, 6:39 PM CDT	TSTM WND DMG	1 Nnw Hazel Green, AL	TREE DOWN ON A GARAGE. TIME ESTIMATED FROM RADAR.
May 6, 6:40 PM CDT	TSTM WND DMG	4 Ene Madison, AL	TREE DOWN NEAR EXPLORER AND FARROW ROADS IN RESEARCH PARK. TIME ESTIMATED FROM RADAR.
May 6, 6:53 PM CDT	TSTM WND DMG	4 Ese Huntsville, AL	TREE DOWN ACROSS A LANE NEAR THE INTERSECTION OF FOUR MILE POST RD. AND WHITESBURG DR. TIME ESTIMATED FROM RADAR.
May 6, 6:58 PM CDT	TSTM WND DMG	4 Nne Owens Crossroads, AL	TREE DOWN ON ESSLINGER DR. NEAR CHERRY TREE RD. TREE CAUGHT ON FIRE AND THE TRANSFORMER BLEW KNOCKING THE POWER OUT.
May 6, 7:08 PM CDT	TSTM WND DMG	5 Sw Skyline, AL	TREE DOWN ACROSS COUNTY ROAD 8 IN THE PLEASANT GROVE AREA. TIME ESTIMATED FROM RADAR.
May 6, 7:18 PM CDT	TSTM WND DMG	8 Nne Skyline, AL	TREE DOWN ACROSS HYTOP ROAD IN THE HYTOP AREA. TIME ESTIMATED FROM RADAR.
May 6, 7:22 PM CDT	TSTM WND DMG	Grant, AL	MULTIPLE TREES DOWN AROUND GRANT. TIME ESTIMATED FROM RADAR.
May 6, 7:23 PM CDT	TSTM WND DMG	2 Nnw Scottsboro, AL	TREE DOWN ON OLD LARKINSVILLE ROAD NEAR SCOTTSBORO. TIME ESTIMATED FROM RADAR.

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, 11.5 hours before the alert went out and 115 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: 1285 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: -107 m²/s²
0-3 km storm-relative helicity: -60 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

664 
WUUS54 KHUN 062327
SVRHUN
ALC043-071-079-083-089-095-103-070015-
/O.NEW.KHUN.SV.W.0052.210506T2327Z-210507T0015Z/

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

The National Weather Service in Huntsville Alabama has issued a

* Severe Thunderstorm Warning for...
  Jackson County in northeastern Alabama...
  Marshall County in northeastern Alabama...
  Madison County in north central Alabama...
  Southeastern Limestone County in north central Alabama...
  Cullman County in north central Alabama...
  Morgan County in north central Alabama...
  Southeastern Lawrence County in northwestern Alabama...

* Until 715 PM CDT.

* At 625 PM CDT, severe thunderstorms were located along a line
  extending from near Hazel Green to near Priceville to Ashridge,
  moving southeast at 55 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Emergency management and Doppler radar.

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

* Locations impacted include...
  Huntsville, Decatur, Madison, Cullman, Scottsboro, Hartselle,
  Guntersville, Arab, Bridgeport and Moores Mill.

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 northern Alabama and southern middle Tennessee. 
SEEK SHELTER NOW inside a sturdy structure and stay away from 
windows! 

If on or near the Tennessee River or Lake Guntersville, get away 
from the water and move indoors or inside a vehicle. Remember, 
lightning can strike out to 15 miles from the parent thunderstorm. 
If you can hear thunder, you are close enough to be struck by 
lightning. Move to safe shelter now!  Do not be caught on the water 
in a thunderstorm.

&&

LAT...LON 3390 8710 3399 8715 3399 8714 3430 8711
      3431 8749 3458 8705 3499 8666 3498 8571
      3474 8577 3422 8631 3417 8638 3426 8644
      3425 8652 3412 8660 3408 8669 3409 8669
      3398 8676 3391 8692 3387 8694 3386 8696
TIME...MOT...LOC 2325Z 299DEG 49KT 3496 8659 3454 8695 3422 8746 

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

25

1 follow-up statement

421 
WWUS54 KHUN 070001
SVSHUN

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

ALC079-083-070009-
/O.CAN.KHUN.SV.W.0052.000000T0000Z-210507T0015Z/
Limestone AL-Lawrence AL-
701 PM CDT Thu May 6 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN LIMESTONE AND
SOUTHEASTERN LAWRENCE COUNTIES IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

LAT...LON 3390 8710 3391 8709 3399 8715 3399 8711
      3430 8711 3445 8688 3498 8646 3498 8571
      3474 8577 3422 8631 3417 8638 3426 8644
      3425 8652 3412 8660 3408 8669 3409 8669
      3398 8676 3394 8688 3387 8694 3386 8696
TIME...MOT...LOC 2359Z 293DEG 42KT 3497 8629 3450 8664 3416 8707 

$$

ALC043-071-089-095-103-070015-
/O.CON.KHUN.SV.W.0052.000000T0000Z-210507T0015Z/
Jackson AL-Marshall AL-Madison AL-Cullman AL-Morgan AL-
701 PM CDT Thu May 6 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM CDT
FOR JACKSON...MARSHALL...MADISON...CULLMAN AND SOUTHEASTERN MORGAN
COUNTIES...

At 659 PM CDT, severe thunderstorms were located along a line
extending from 6 miles south of Huntland to near Morgan City to near
Nesmith, moving southeast at 50 mph.

HAZARD...60 mph wind gusts.

SOURCE...Emergency management and Doppler radar.

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

Locations impacted include...
Huntsville, Cullman, Scottsboro, Hartselle, Guntersville, Arab,
Bridgeport, Moores Mill, Redstone Arsenal and Meridianville.

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 northern Alabama. SEEK SHELTER NOW inside a 
sturdy structure and stay away from windows.
 
If on or near the Tennessee River or Lake Guntersville, get away 
from the water and move indoors or inside a vehicle. remember, 
lightning can strike out to 15 miles from the parent thunderstorm. 
If you can hear thunder, you are close enough to be struck by 
lightning. Move to safe shelter now!  Do not be caught on the water 
in a thunderstorm.

&&

LAT...LON 3390 8710 3391 8709 3399 8715 3399 8711
      3430 8711 3445 8688 3498 8646 3498 8571
      3474 8577 3422 8631 3417 8638 3426 8644
      3425 8652 3412 8660 3408 8669 3409 8669
      3398 8676 3394 8688 3387 8694 3386 8696
TIME...MOT...LOC 2359Z 293DEG 42KT 3497 8629 3450 8664 3416 8707 

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

25

The office that day

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

Issued	Product	Office	Counties	Lasted
May 6, 4:56 PM CDT	Severe Thunderstorm Warning	HUN	Colbert, Lauderdale	49 min
May 6, 5:31 PM CDT	Severe Thunderstorm Warning	HUN	Colbert, Franklin, Lauderdale, Lawrence, Limestone, Madison and 1 more	59 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.