Alert archive / Alabama / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 11, NWS Huntsville, AL

March 27, 2021Jackson County, Alabama

NWS Huntsville, AL issued this severe thunderstorm warning at Mar 27, 2021, 3:52 AM CDT for Jackson County, Alabama. It was in force for 38 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Mar 27, 2021, 3:52 AM CDT (08:52 UTC)
Expired
Mar 27, 2021, 4:30 AM CDT
In force
38 min
Issued by
NWS Huntsville, AL
Area
Storm-based polygon
Hail
1.0 in
Wind
50.0 mph

County Jackson County, AL

The radar

The Northeast Alabama radar (KHTX), 37 km from the middle of the area, began a volume at 08:55 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.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 8.9 hours before the alert went out and 164 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-pSkew-T log-p diagram, Nashville Metro, TN at 00:00Z on 2021-03-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Nashville Metro, TN at 00:00Z on 2021-03-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 17 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
1974 m above ground
0-6 km bulk shear
64 kt
0-1 km storm-relative helicity
17 m²/s²
0-3 km storm-relative helicity
75 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

808 
WUUS54 KHUN 270852
SVRHUN
ALC071-270930-
/O.NEW.KHUN.SV.W.0011.210327T0852Z-210327T0930Z/

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

The National Weather Service in Huntsville Alabama has issued a

* Severe Thunderstorm Warning for...
  Northeastern Jackson County in northeastern Alabama...

* Until 430 AM CDT.

* At 352 AM CDT, a severe thunderstorm was located near Stevenson, or
  12 miles northeast of Scottsboro, moving northeast at 40 mph.

  HAZARD...Quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to vehicles is expected.

* Locations impacted include...
  Bridgeport, Stevenson, Fabius, Higdon, Long Island and Russell Cave
  National Monument.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3484 8561 3483 8563 3479 8564 3476 8565
      3472 8580 3488 8596 3499 8580 3499 8567
      3496 8560 3486 8559
TIME...MOT...LOC 0852Z 241DEG 37KT 3478 8585 

HAIL...1.00IN
WIND...<50MPH
 
$$

GH
2 follow-up statements
307 
WWUS54 KHUN 270911
SVSHUN

Severe Weather Statement
National Weather Service Huntsville AL
411 AM CDT Sat Mar 27 2021

ALC071-270930-
/O.CON.KHUN.SV.W.0011.000000T0000Z-210327T0930Z/
Jackson AL-
411 AM CDT Sat Mar 27 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 AM CDT
FOR NORTHEASTERN JACKSON COUNTY...

At 411 AM CDT, a severe thunderstorm was located near Bridgeport,
moving northeast at 45 mph.

HAZARD...Quarter size hail.

SOURCE...Radar indicated.

IMPACT...Damage to vehicles is expected.

Locations impacted include...
Bridgeport, Stevenson, Fabius, Higdon and Long Island. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3484 8561 3483 8563 3480 8566 3478 8575
      3486 8584 3499 8567 3496 8560 3486 8559
TIME...MOT...LOC 0911Z 241DEG 37KT 3488 8564 

HAIL...1.00IN
WIND...<50MPH
 
$$

GH
125 
WWUS54 KHUN 270925
SVSHUN

Severe Weather Statement
National Weather Service Huntsville AL
425 AM CDT Sat Mar 27 2021

ALC071-270934-
/O.EXP.KHUN.SV.W.0011.000000T0000Z-210327T0930Z/
Jackson AL-
425 AM CDT Sat Mar 27 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN JACKSON COUNTY
WILL EXPIRE AT 430 AM CDT...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.

LAT...LON 3484 8561 3483 8563 3480 8566 3478 8575
      3486 8584 3499 8567 3496 8560 3486 8559
TIME...MOT...LOC 0924Z 241DEG 37KT 3494 8551 

$$

GH

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 27, 1:28 AM CDTFlash Flood WatchHUNColbert, Franklin, Jackson, Lauderdale, Lawrence, Limestone and 2 more31 hr
Mar 27, 2:47 AM CDTSpecial Weather StatementHUNColbert28 min
Mar 27, 3:05 AM CDTSpecial Weather StatementHUNJackson40 min
Mar 27, 3:14 AM CDTSpecial Weather StatementHUNLauderdale46 min
Mar 27, 3:40 AM CDTSpecial Weather StatementHUNJackson35 min
Mar 27, 10:02 AM CDTSpecial Weather StatementHUNLauderdale28 min
Mar 27, 10:57 AM CDTSpecial Weather StatementHUNLauderdale18 min
Mar 27, 4:22 PM CDTSpecial Weather StatementHUNLawrence23 min
Mar 27, 4:28 PM CDTSevere Thunderstorm WarningHUNCullman47 min
Mar 27, 4:36 PM CDTSevere Thunderstorm WarningHUNLawrence24 min
Mar 27, 4:57 PM CDTSevere Thunderstorm WarningHUNLawrence, Morgan18 min
Mar 27, 5:14 PM CDTSevere Thunderstorm WarningHUNCullman, Madison, Marshall, Morgan46 min
Mar 27, 5:17 PM CDTSpecial Weather StatementHUNMorgan28 min
Mar 27, 5:44 PM CDTSpecial Weather StatementHUNMorgan46 min
Mar 27, 5:54 PM CDTSevere Thunderstorm WarningHUNJackson, Madison, Marshall36 min
Mar 27, 6:14 PM CDTSpecial Weather StatementHUNMadison16 min
Mar 27, 6:24 PM CDTSevere Thunderstorm WarningHUNJackson31 min
Mar 27, 6:29 PM CDTSevere Thunderstorm WarningHUNMadison16 min
Mar 27, 6:43 PM CDTSevere Thunderstorm WarningHUNJackson, Madison17 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2021Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.