Alert archive / Alabama / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 27, NWS Huntsville, AL

March 2, 2012Madison County, Alabama

NWS Huntsville, AL issued this severe thunderstorm warning at Mar 2, 2012, 4:21 PM CST for Madison County, Alabama. It was in force for 24 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 2, 2012, 4:21 PM CST (22:21 UTC)
Expired: Mar 2, 2012, 4:45 PM CST
In force: 24 min
Issued by: NWS Huntsville, AL
Area: Storm-based polygon

County Madison County, AL

The radar

The Northeast Alabama radar (KHTX), 59 km from the middle of the area, began a volume at 22:21 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 2, 4:38 PM CST	HAIL 0.88	1 Wnw Triana, AL	NICKEL SIZED HAIL REPORTED AT FIELDS POND DR.
Mar 2, 4:45 PM CST	HAIL 1	Huntsville, AL	DIME TO QUARTER SIZE HAIL WAS REPORTED.
Mar 2, 4:49 PM CST	HAIL 1	4 N Farley, AL	DEPTH UPTO AN INCH OF QUARTER SIZED HAIL REPORTED
Mar 2, 4:50 PM CST	HAIL 0.75	3 N Farley, AL	PENNY SIZED HAIL AT MEMORIAL PARKWAY AND MEADOWBROOKK DR

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 2, 1:20 PM CST	Tornado Watch	SPC	9 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 10.4 hours before the alert went out and 160 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: 544 J/kg
Mixed-layer CIN: -15 J/kg
Mixed-layer LCL: 530 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: 180 m²/s²
0-3 km storm-relative helicity: 204 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 2.5

Open this sounding in Storm Lab

The text

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

999 
WUUS54 KHUN 022221
SVRHUN
ALC089-022245-
/O.NEW.KHUN.SV.W.0027.120302T2221Z-120302T2245Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HUNTSVILLE AL
421 PM CST FRI MAR 2 2012

THE NATIONAL WEATHER SERVICE IN HUNTSVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN MADISON COUNTY IN NORTH CENTRAL ALABAMA...

* UNTIL 445 PM CST

* AT 416 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 12
  MILES SOUTHWEST OF TRIANA...OR ABOUT NEAR HARTSELLE...AND MOVING   
  EAST AT 60 MPH. LARGE HAIL HAS BEEN REPORTED WITH THIS STORM IN    
  FLINT CITY.

* LOCATIONS IMPACTED INCLUDE...
  TRIANA...
  FARLEY...WHITESBURG...
  REDSTONE ARSENAL...
  SOUTH HUNTSVILLE...
  HAMPTON COVE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM.
WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A
TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A
STURDY STRUCTURE...SUCH AS A BASEMENT OR INTERIOR ROOM.

&&

LAT...LON 3469 8635 3464 8636 3454 8654 3458 8658
      3458 8661 3456 8663 3456 8668 3457 8667
      3459 8669 3459 8671 3457 8674 3458 8679
      3462 8679 3479 8657
TIME...MOT...LOC 2220Z 248DEG 52KT 3454 8685

$$

1 follow-up statement

778 
WWUS54 KHUN 022243
SVSHUN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
443 PM CST FRI MAR 2 2012

ALC089-022254-
/O.EXP.KHUN.SV.W.0027.000000T0000Z-120302T2245Z/
MADISON AL-
443 PM CST FRI MAR 2 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN MADISON COUNTY
EXPIRES AT 445 PM CST...

WEATHER SERVICE DOPPLER RADAR INDICATES THE THUNDERSTORM THAT
PROMPTED THE WARNING HAS WEAKENED AND IS NO LONGER SEVERE. THEREFORE
THE SEVERE THUNDERSTORM WARNING HAS BEEN ALLOWED TO EXPIRE.

HEAVY RAIN...SMALL HAIL...GUSTY WINDS...AND FREQUENT LIGHTNING ARE
STILL POSSIBLE FROM THIS THUNDERSTORM. STAY INDOORS UNTIL THE STORM
HAS PASSED.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM CST FRIDAY EVENING FOR
NORTHERN ALABAMA AND CENTRAL TENNESSEE.

LAT...LON 3469 8635 3464 8636 3454 8654 3458 8658
      3458 8661 3456 8663 3456 8668 3457 8667
      3459 8669 3459 8671 3457 8674 3458 8679
      3462 8679 3479 8657
TIME...MOT...LOC 2244Z 248DEG 52KT 3467 8646

$$

BCC

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 2, 4:44 AM CST	Wind Advisory	HUN	Colbert, Cullman, DeKalb, Franklin, Jackson, Lauderdale and 5 more	11 hr
Mar 2, 7:21 AM CST	Special Weather Statement	HUN	Lawrence	39 min
Mar 2, 8:09 AM CST	Special Weather Statement	HUN	Lawrence, Limestone	51 min
Mar 2, 8:51 AM CST	Severe Thunderstorm Warning	HUN	Lauderdale, Lawrence, Limestone, Madison	24 min
Mar 2, 9:12 AM CST	Severe Thunderstorm Warning	HUN	Limestone, Madison	33 min
Mar 2, 9:15 AM CST	Special Weather Statement	HUN	Lawrence	30 min
Mar 2, 9:18 AM CST	Tornado Warning	HUN	Limestone, Madison	27 min
Mar 2, 9:35 AM CST	Tornado Warning	HUN	Limestone, Madison	25 min
Mar 2, 9:41 AM CST	Tornado Warning	HUN	Jackson, Madison	34 min
Mar 2, 9:59 AM CST	Tornado Warning Emergency	HUN	Jackson, Madison	31 min
Mar 2, 10:10 AM CST	Tornado Warning	HUN	Jackson	35 min
Mar 2, 10:24 AM CST	Tornado Warning	HUN	Jackson, Madison	36 min
Mar 2, 1:01 PM CST	Special Weather Statement	HUN	Lawrence, Limestone	44 min
Mar 2, 1:26 PM CST	Special Weather Statement	HUN	Franklin	34 min
Mar 2, 1:30 PM CST	Severe Thunderstorm Warning	HUN	Lauderdale, Lawrence, Limestone	30 min
Mar 2, 1:31 PM CST	Severe Thunderstorm Warning	HUN	Franklin, Lawrence	29 min
Mar 2, 1:55 PM CST	Severe Thunderstorm Warning	HUN	Limestone, Madison	50 min
Mar 2, 2:00 PM CST	Tornado Warning	HUN	Limestone	30 min
Mar 2, 2:06 PM CST	Severe Thunderstorm Warning	HUN	Colbert, Lauderdale	24 min
Mar 2, 2:29 PM CST	Severe Thunderstorm Warning	HUN	Colbert, Lauderdale	31 min
Mar 2, 2:41 PM CST	Tornado Warning	HUN	Colbert, Lauderdale, Lawrence	34 min
Mar 2, 3:07 PM CST	Tornado Warning	HUN	Limestone	23 min
Mar 2, 3:16 PM CST	Severe Thunderstorm Warning	HUN	Colbert, Lawrence	29 min
Mar 2, 3:26 PM CST	Tornado Warning	HUN	Limestone, Madison	34 min
Mar 2, 3:27 PM CST	Tornado Warning	HUN	Lawrence	33 min
Mar 2, 3:44 PM CST	Severe Thunderstorm Warning	HUN	Limestone	31 min
Mar 2, 3:58 PM CST	Tornado Warning	HUN	Jackson, Madison	14 min
Mar 2, 4:00 PM CST	Severe Thunderstorm Warning	HUN	Lawrence, Morgan	30 min
Mar 2, 4:10 PM CST	Severe Thunderstorm Warning	HUN	Jackson, Madison	50 min
Mar 2, 4:15 PM CST	Severe Thunderstorm Warning	HUN	Cullman, Morgan	30 min
Mar 2, 4:33 PM CST	Tornado Warning	HUN	Cullman, Morgan	27 min
Mar 2, 4:51 PM CST	Severe Thunderstorm Warning	HUN	Jackson, Madison	24 min
Mar 2, 4:55 PM CST	Tornado Warning	HUN	Morgan	15 min
Mar 2, 5:14 PM CST	Severe Thunderstorm Warning	HUN	Jackson	46 min
Mar 2, 5:49 PM CST	Severe Thunderstorm Warning	HUN	Cullman	26 min
Mar 2, 5:57 PM CST	Severe Thunderstorm Warning	HUN	Jackson	18 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2012 Every severe thunderstorm warning in 2012

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.