Alert archive / Alabama / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 21, NWS Huntsville, AL

May 12, 2016Limestone County, Madison County, Alabama

NWS Huntsville, AL issued this severe thunderstorm warning at May 12, 2016, 5:38 PM CDT for Limestone County, Madison County, Alabama. It was in force for 25 min. 3 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 12, 2016, 5:38 PM CDT (22:38 UTC)
Expired
May 12, 2016, 6:03 PM CDT
In force
25 min
Issued by
NWS Huntsville, AL
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Limestone County, AL, Madison County, AL

The radar

The Northeast Alabama radar (KHTX), 64 km from the middle of the area, began a volume at 22:41 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

TimeReportWhereRemark
May 12, 5:40 PM CDTTSTM WND DMG3 Sw Harvest, ALA FEW LARGE LIMBS WERE DOWNED BY THUNDERSTORM WINDS.
May 12, 5:44 PM CDTTSTM WND DMG3 Sw Harvest, ALTREE DOWN ALONG SMITH VASSER ROAD, SOUTH OF YARBROUGH ROAD.
May 12, 5:59 PM CDTTSTM WND DMG1 Ene Huntsville, ALTREE DOWN NEAR MAPLE HILL CEMETERY.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 10.6 hours before the alert went out and 155 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 12:00Z on 2016-05-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 134 joules per kilogram.LCLLFCEL10008507005003002001001 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 12:00Z on 2016-05-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 53 square meters per square second.1939Sfc1 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
134 J/kg
Mixed-layer CIN
-93 J/kg
Mixed-layer LCL
832 m above ground
0-6 km bulk shear
8 kt
0-1 km storm-relative helicity
53 m²/s²
0-3 km storm-relative helicity
67 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

470 
WUUS54 KHUN 122238
SVRHUN
ALC083-089-122315-
/O.NEW.KHUN.SV.W.0021.160512T2238Z-160512T2315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HUNTSVILLE AL
538 PM CDT THU MAY 12 2016

THE NATIONAL WEATHER SERVICE IN HUNTSVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN MADISON COUNTY IN NORTH CENTRAL ALABAMA...
  NORTHEASTERN LIMESTONE COUNTY IN NORTH CENTRAL ALABAMA...

* UNTIL 615 PM CDT

* AT 537 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR ATHENS...
  MOVING EAST AT 50 MPH.

  HAZARD...60 TO 70 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...
  HUNTSVILLE...MADISON...ATHENS...REDSTONE ARSENAL...MERIDIANVILLE...
  MOORES MILL...TRIANA...ALABAMA A AND M UNIVERSITY...HUNTSVILLE
  INTERNATIONAL AIRPORT AND UNIVERSITY OF ALABAMA IN HUNTSVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

LARGE HAIL AND DAMAGING WINDS AND CONTINUOUS CLOUD TO GROUND
LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY.
LIGHTNING IS ONE OF NATURE'S LEADING KILLERS. REMEMBER...IF YOU CAN
HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING.

&&

LAT...LON 3476 8637 3458 8668 3459 8671 3455 8677
      3485 8713 3489 8707 3496 8686
TIME...MOT...LOC 2237Z 290DEG 43KT 3480 8687 

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

KTW
2 follow-up statements
678 
WWUS54 KHUN 122248
SVSHUN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
548 PM CDT THU MAY 12 2016

ALC083-089-122315-
/O.CON.KHUN.SV.W.0021.000000T0000Z-160512T2315Z/
MADISON AL-LIMESTONE AL-
548 PM CDT THU MAY 12 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM CDT
FOR SOUTHERN MADISON AND NORTHEASTERN LIMESTONE COUNTIES...

AT 546 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR MADISON...MOVING
EAST AT 50 MPH.

HAZARD...60 TO 70 MPH WIND GUSTS AND QUARTER SIZE HAIL. 

SOURCE...TRAINED WEATHER SPOTTERS REPORTED 60 MPH MEASURED WIND
         GUST. 

IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE TO 
         ROOFS...SIDING...AND TREES. 

LOCATIONS IMPACTED INCLUDE...
HUNTSVILLE...MADISON...ATHENS...REDSTONE ARSENAL...MOORES MILL...TRIANA...
ALABAMA A AND M UNIVERSITY...HUNTSVILLE INTERNATIONAL AIRPORT...
UNIVERSITY OF ALABAMA IN HUNTSVILLE AND MARSHALL SPACE FLIGHT CENTER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

CONTINUOUS CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
MOVE INDOORS IMMEDIATELY. LIGHTNING IS ONE OF NATURE'S LEADING
KILLERS. REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO
BE STRUCK BY LIGHTNING.

&&

LAT...LON 3476 8637 3458 8668 3459 8671 3455 8677
      3484 8709 3487 8704 3493 8687
TIME...MOT...LOC 2246Z 290DEG 43KT 3476 8673 

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

KTW
767 
WWUS54 KHUN 122303
SVSHUN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
603 PM CDT THU MAY 12 2016

ALC083-089-122312-
/O.CAN.KHUN.SV.W.0021.000000T0000Z-160512T2315Z/
MADISON AL-LIMESTONE AL-
603 PM CDT THU MAY 12 2016

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN MADISON AND
NORTHEASTERN LIMESTONE COUNTIES IS CANCELLED...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSE AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
THEREFORE THE WARNING HAS BEEN CANCELLED.  HOWEVER GUSTY WINDS TO
BETWEEN 40 AND 50 MPH AND HEAVY RAIN ARE STILL POSSIBLE WITH THIS
THUNDERSTORM.

LAT...LON 3476 8637 3458 8668 3459 8671 3455 8677
      3484 8709 3487 8704 3493 8687
TIME...MOT...LOC 2301Z 290DEG 43KT 3469 8651 

$$

KTW

The office that day

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

IssuedProductOfficeCountiesLasted
May 12, 7:18 AM CDTSpecial Weather StatementHUNJackson42 min
May 12, 8:06 AM CDTSpecial Weather StatementHUNJackson39 min
May 12, 8:34 AM CDTSpecial Weather StatementHUNColbert41 min
May 12, 11:17 AM CDTSpecial Weather StatementHUNCullman43 min
May 12, 11:19 AM CDTSpecial Weather StatementHUNCullman41 min
May 12, 11:30 AM CDTSpecial Weather StatementHUNMadison45 min
May 12, 12:01 PM CDTSpecial Weather StatementHUNMorgan44 min
May 12, 12:26 PM CDTSpecial Weather StatementHUNMorgan49 min
May 12, 12:32 PM CDTSpecial Weather StatementHUNMorgan43 min
May 12, 12:55 PM CDTSpecial Weather StatementHUNMadison50 min
May 12, 1:00 PM CDTSpecial Weather StatementHUNMadison45 min
May 12, 1:14 PM CDTSpecial Weather StatementHUNMadison46 min
May 12, 1:24 PM CDTSpecial Weather StatementHUNJackson51 min
May 12, 1:27 PM CDTSpecial Weather StatementHUNDeKalb48 min
May 12, 1:34 PM CDTSpecial Weather StatementHUNLimestone41 min
May 12, 3:46 PM CDTSpecial Weather StatementHUNColbert29 min
May 12, 3:47 PM CDTSpecial Weather StatementHUNLauderdale43 min
May 12, 4:06 PM CDTSpecial Weather StatementHUNColbert24 min
May 12, 4:35 PM CDTSpecial Weather StatementHUNLauderdale40 min
May 12, 4:41 PM CDTSpecial Weather StatementHUNFranklin49 min
May 12, 4:49 PM CDTSpecial Weather StatementHUNLimestone41 min
May 12, 5:02 PM CDTSevere Thunderstorm WarningHUNLauderdale, Lawrence, Limestone43 min
May 12, 5:10 PM CDTSpecial Weather StatementHUNFranklin50 min
May 12, 6:00 PM CDTSpecial Weather StatementHUNLawrence, Morgan45 min
May 12, 6:06 PM CDTSpecial Weather StatementHUNMadison39 min
May 12, 6:21 PM CDTSpecial Weather StatementHUNCullman24 min
May 12, 6:26 PM CDTSpecial Weather StatementHUNJackson34 min
May 12, 6:50 PM CDTSpecial Weather StatementHUNCullman, Morgan40 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2016Every severe thunderstorm warning in 2016

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.