Alert archive / Alabama / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 15, NWS Huntsville, AL

March 27, 20214 counties in Alabama

NWS Huntsville, AL issued this severe thunderstorm warning at Mar 27, 2021, 5:14 PM CDT for 4 counties in Alabama. It was in force for 46 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 27, 2021, 5:14 PM CDT (22:14 UTC)
Expired: Mar 27, 2021, 6:00 PM CDT
In force: 46 min
Issued by: NWS Huntsville, AL
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

Counties Cullman County, AL, Madison County, AL, Marshall County, AL, Morgan County, AL

The radar

The Northeast Alabama radar (KHTX), 86 km from the middle of the area, began a volume at 22:13 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, 5:27 PM CDT	HAIL 0.25	Eva, AL
Mar 27, 5:40 PM CDT	TSTM WND DMG	7 Wnw Union Grove, AL	CORRECTS PREVIOUS TSTM WND DMG REPORT FROM 7 WNW UNION GROVE. 5 TO 6 TREES DOWNED.
Mar 27, 5:45 PM CDT	TSTM WND DMG	7 Nw Union Grove, AL	CORRECTS PREVIOUS TSTM WND DMG REPORT FROM 7 NW UNION GROVE. TREES TOOK DOWN POWER LINES ON GREEN BRIAR COVE RD.
Mar 27, 5:58 PM CDT	HAIL 1.75	New Hope, AL

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, 1:51 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 10.2 hours before the alert went out and 127 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.

606 
WUUS54 KHUN 272214
SVRHUN
ALC043-089-095-103-272300-
/O.NEW.KHUN.SV.W.0015.210327T2214Z-210327T2300Z/

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

The National Weather Service in Huntsville Alabama has issued a

* Severe Thunderstorm Warning for...
  Northwestern Marshall County in northeastern Alabama...
  South central Madison County in north central Alabama...
  Northeastern Cullman County in north central Alabama...
  Southeastern Morgan County in north central Alabama...

* Until 600 PM CDT.

* At 513 PM CDT, a severe thunderstorm was located near Cullman,
  moving northeast at 40 mph.

  HAZARD...Ping pong ball size hail and 60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...People and animals outdoors will be injured. Expect hail 
           damage to roofs, siding, windows, and vehicles. Expect 
           wind damage to roofs, siding, and trees.

* Locations impacted include...
  Southern Huntsville, Cullman, Arab, Redstone Arsenal, Owens Cross
  Roads, Holly Pond, Morgan City, Baileyton, Eva and Union Grove.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 3419 8688 3469 8658 3447 8624 3407 8673
TIME...MOT...LOC 2213Z 215DEG 36KT 3419 8677 

HAIL...1.50IN
WIND...60MPH
 
$$

KTW

3 follow-up statements

471 
WWUS54 KHUN 272225
SVSHUN

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

ALC043-089-095-103-272300-
/O.CON.KHUN.SV.W.0015.000000T0000Z-210327T2300Z/
Marshall AL-Madison AL-Cullman AL-Morgan AL-
525 PM CDT Sat Mar 27 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM CDT
FOR NORTHWESTERN MARSHALL...SOUTH CENTRAL MADISON...NORTHEASTERN
CULLMAN AND SOUTHEASTERN MORGAN COUNTIES...

At 525 PM CDT, a severe thunderstorm was located 8 miles northwest of
Holly Pond, or 11 miles west of Arab, moving northeast at 40 mph.

HAZARD...Ping pong ball size hail and 60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees.

Locations impacted include...
Southern Huntsville, Arab, Redstone Arsenal, Owens Cross Roads,
Morgan City, Baileyton, Eva, Union Grove, Hulaco and Eddy.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 3427 8681 3469 8658 3447 8624 3418 8664
TIME...MOT...LOC 2225Z 215DEG 36KT 3429 8669 

HAIL...1.50IN
WIND...60MPH
 
$$

KTW

758 
WWUS54 KHUN 272233
SVSHUN

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

ALC043-272243-
/O.CAN.KHUN.SV.W.0015.000000T0000Z-210327T2300Z/
Cullman AL-
533 PM CDT Sat Mar 27 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN CULLMAN 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 900 PM CDT for north central
and northeastern Alabama...and Middle Tennessee.

LAT...LON 3431 8669 3433 8673 3469 8658 3447 8624
      3430 8650
TIME...MOT...LOC 2233Z 215DEG 36KT 3436 8663 

$$

ALC089-095-103-272300-
/O.CON.KHUN.SV.W.0015.000000T0000Z-210327T2300Z/
Marshall AL-Madison AL-Morgan AL-
533 PM CDT Sat Mar 27 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM CDT
FOR NORTHWESTERN MARSHALL...SOUTH CENTRAL MADISON AND SOUTHEASTERN
MORGAN COUNTIES...

At 533 PM CDT, a severe thunderstorm was located 8 miles west of
Arab, moving northeast at 40 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...
Southern Huntsville, Arab, Redstone Arsenal, Owens Cross Roads,
Morgan City, Union Grove, Eddy, Laceys Spring, Farley and Ryan
Crossroads.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 3431 8669 3433 8673 3469 8658 3447 8624
      3430 8650
TIME...MOT...LOC 2233Z 215DEG 36KT 3436 8663 

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

KTW

455 
WWUS54 KHUN 272247
SVSHUN

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

ALC103-272257-
/O.CAN.KHUN.SV.W.0015.000000T0000Z-210327T2300Z/
Morgan AL-
547 PM CDT Sat Mar 27 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MORGAN 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 900 PM CDT for north central
and northeastern Alabama...and Middle Tennessee.

LAT...LON 3442 8655 3442 8657 3452 8656 3465 8651
      3447 8624 3438 8643
TIME...MOT...LOC 2247Z 215DEG 36KT 3448 8653 

$$

ALC089-095-272300-
/O.CON.KHUN.SV.W.0015.000000T0000Z-210327T2300Z/
Marshall AL-Madison AL-
547 PM CDT Sat Mar 27 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM CDT
FOR NORTHWESTERN MARSHALL AND SOUTH CENTRAL MADISON COUNTIES...

At 547 PM CDT, a severe thunderstorm was located over Morgan City, or
11 miles north of Arab, moving northeast at 40 mph.

HAZARD...Golf ball size hail and 60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees.

Locations impacted include...
Southern Huntsville, Owens Cross Roads and Union Grove. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 3442 8655 3442 8657 3452 8656 3465 8651
      3447 8624 3438 8643
TIME...MOT...LOC 2247Z 215DEG 36KT 3448 8653 

HAIL...1.75IN
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, 4:36 PM CDT	Severe Thunderstorm Warning	HUN	Lawrence	24 min
Mar 27, 4:57 PM CDT	Severe Thunderstorm Warning	HUN	Lawrence, Morgan	18 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.