Alert archive / Alabama / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 21, NWS Huntsville, AL

March 31, 2015DeKalb County, Marshall County, Alabama

NWS Huntsville, AL issued this severe thunderstorm warning at Mar 31, 2015, 6:56 PM CDT for DeKalb County, Marshall County, Alabama. It was in force for 35 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 31, 2015, 6:56 PM CDT (23:56 UTC)
Expired: Mar 31, 2015, 7:31 PM CDT
In force: 35 min
Issued by: NWS Huntsville, AL
Area: Storm-based polygon

Counties DeKalb County, AL, Marshall County, AL

The radar

The Northeast Alabama radar (KHTX), 77 km from the middle of the area, began a volume at 23:58 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.

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 31, 4:08 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 11.9 hours before the alert went out and 136 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: 13 J/kg
Mixed-layer CIN: -343 J/kg
Mixed-layer LCL: 1173 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 173 m²/s²
0-3 km storm-relative helicity: 141 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

782 
WUUS54 KHUN 312356
SVRHUN
ALC049-095-010100-
/O.NEW.KHUN.SV.W.0021.150331T2356Z-150401T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HUNTSVILLE AL
656 PM CDT TUE MAR 31 2015

THE NATIONAL WEATHER SERVICE IN HUNTSVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN DEKALB COUNTY IN NORTHEASTERN ALABAMA...
  SOUTHEASTERN MARSHALL COUNTY IN NORTHEASTERN ALABAMA...

* UNTIL 800 PM CDT

* AT 655 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS 
  STORM WAS LOCATED NEAR ALBERTVILLE...AND MOVING EAST AT 20 MPH. 
  THIS STORM HAS A HISTORY OF PRODUCING QUARTER SIZE HAIL.

* LOCATIONS IMPACTED INCLUDE...
  ALBERTVILLE...BOAZ...GUNTERSVILLE...COLLINSVILLE...CROSSVILLE...
  GERALDINE...LAKEVIEW...PAINTER...ARONA AND PEEKS CORNER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...DESTRUCTIVE HAIL...
DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION...MOVE TO
AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY
RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER
COVERS THE ROAD.

THIS STORM HAS A HISTORY OF PRODUCING LARGE HAIL. SEEK SHELTER NOW
INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 3424 8584 3420 8585 3420 8611 3419 8611
      3419 8617 3418 8620 3419 8636 3437 8634
      3442 8586 3424 8582
TIME...MOT...LOC 2355Z 275DEG 18KT 3431 8625 

$$

LN

2 follow-up statements

775 
WWUS54 KHUN 010014
SVSHUN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
714 PM CDT TUE MAR 31 2015

ALC049-095-010100-
/O.CON.KHUN.SV.W.0021.000000T0000Z-150401T0100Z/
DEKALB AL-MARSHALL AL-
714 PM CDT TUE MAR 31 2015

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM CDT
FOR SOUTHWESTERN DEKALB AND SOUTHEASTERN MARSHALL COUNTIES...

AT 714 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE
OF PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60
MPH. THIS STORM WAS LOCATED NEAR ALBERTVILLE...MOVING EAST AT 20 MPH.

LOCATIONS IMPACTED INCLUDE...
ALBERTVILLE...BOAZ...COLLINSVILLE...CROSSVILLE...GERALDINE...
LAKEVIEW...PAINTER...ARONA...KILPATRICK AND PEEKS CORNER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...DESTRUCTIVE HAIL...
DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN
INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY
RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER
COVERS THE ROAD.

THIS STORM HAS A HISTORY OF PRODUCING LARGE HAIL. SEEK SHELTER NOW
INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 3424 8584 3420 8585 3420 8611 3419 8611
      3419 8617 3418 8620 3418 8624 3436 8622
      3442 8586 3424 8582
TIME...MOT...LOC 0014Z 275DEG 18KT 3430 8613 

$$

LN

673 
WWUS54 KHUN 010031
SVSHUN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
731 PM CDT TUE MAR 31 2015

ALC049-095-010040-
/O.CAN.KHUN.SV.W.0021.000000T0000Z-150401T0100Z/
DEKALB AL-MARSHALL AL-
731 PM CDT TUE MAR 31 2015

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN DEKALB AND
SOUTHEASTERN MARSHALL COUNTIES IS CANCELLED...
        
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE 
LIMITS AND EXITED DEKALB COUNTY ALABAMA. THEREFORE THE WARNING HAS 
BEEN CANCELLED.

LAT...LON 3424 8584 3420 8585 3420 8611 3419 8611
      3419 8617 3418 8620 3418 8624 3436 8622
      3442 8586 3424 8582
TIME...MOT...LOC 0026Z 275DEG 18KT 3429 8603 

$$

LN

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 31, 1:21 PM CDT	Special Weather Statement	HUN	Morgan	24 min
Mar 31, 1:32 PM CDT	Severe Thunderstorm Warning	HUN	Cullman, Morgan	28 min
Mar 31, 1:52 PM CDT	Special Weather Statement	HUN	Morgan	23 min
Mar 31, 1:59 PM CDT	Severe Thunderstorm Warning	HUN	Cullman, Morgan	31 min
Mar 31, 2:06 PM CDT	Special Weather Statement	HUN	Marshall	24 min
Mar 31, 2:16 PM CDT	Severe Thunderstorm Warning	HUN	Madison, Marshall, Morgan	29 min
Mar 31, 2:27 PM CDT	Severe Thunderstorm Warning	HUN	Cullman	18 min
Mar 31, 2:45 PM CDT	Severe Thunderstorm Warning	HUN	Marshall	30 min
Mar 31, 2:57 PM CDT	Severe Thunderstorm Warning	HUN	DeKalb, Jackson, Marshall	33 min
Mar 31, 3:01 PM CDT	Severe Thunderstorm Warning	HUN	Marshall	14 min
Mar 31, 3:23 PM CDT	Special Weather Statement	HUN	Colbert	52 min
Mar 31, 3:35 PM CDT	Special Weather Statement	HUN	DeKalb	40 min
Mar 31, 3:51 PM CDT	Severe Thunderstorm Warning	HUN	Colbert, Franklin	39 min
Mar 31, 3:53 PM CDT	Special Weather Statement	HUN	Colbert, Lauderdale	52 min
Mar 31, 4:01 PM CDT	Special Weather Statement	HUN	Cullman	44 min
Mar 31, 4:09 PM CDT	Severe Thunderstorm Warning	HUN	Cullman	47 min
Mar 31, 4:26 PM CDT	Severe Thunderstorm Warning	HUN	Franklin, Lawrence	34 min
Mar 31, 4:53 PM CDT	Severe Thunderstorm Warning	HUN	Cullman, Marshall, Morgan	52 min
Mar 31, 4:56 PM CDT	Severe Thunderstorm Warning	HUN	Franklin, Lawrence	10 min
Mar 31, 5:17 PM CDT	Special Weather Statement	HUN	Colbert	43 min
Mar 31, 5:25 PM CDT	Severe Thunderstorm Warning	HUN	Marshall	35 min
Mar 31, 5:26 PM CDT	Special Weather Statement	HUN	Limestone	49 min
Mar 31, 5:32 PM CDT	Special Weather Statement	HUN	Colbert	43 min
Mar 31, 5:44 PM CDT	Severe Thunderstorm Warning	HUN	Cullman, Marshall, Morgan	39 min
Mar 31, 5:56 PM CDT	Severe Thunderstorm Warning	HUN	Lauderdale	34 min
Mar 31, 6:00 PM CDT	Severe Thunderstorm Warning	HUN	Colbert, Lauderdale	30 min
Mar 31, 6:21 PM CDT	Severe Thunderstorm Warning	HUN	DeKalb, Marshall	39 min
Mar 31, 6:26 PM CDT	Severe Thunderstorm Warning	HUN	Colbert, Lauderdale	49 min
Mar 31, 6:33 PM CDT	Special Weather Statement	HUN	Lauderdale	42 min
Mar 31, 6:46 PM CDT	Severe Thunderstorm Warning	HUN	Cullman	44 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2015 Every severe thunderstorm warning in 2015

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.