Alert archive / Alabama / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 44, NWS Huntsville, AL

April 16, 2015Limestone County, Madison County, Alabama

NWS Huntsville, AL issued this severe thunderstorm warning at Apr 16, 2015, 5:41 AM CDT for Limestone County, Madison County, Alabama. It was in force for 34 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Apr 16, 2015, 5:41 AM CDT (10:41 UTC)
Expired
Apr 16, 2015, 6:15 AM CDT
In force
34 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 10:43 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, 10.7 hours before the alert went out and 150 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 2015-04-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 698 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Nashville Metro, TN at 00:00Z on 2015-04-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 109 square meters per square second.193958Sfc1 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
698 J/kg
Mixed-layer CIN
-17 J/kg
Mixed-layer LCL
863 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
109 m²/s²
0-3 km storm-relative helicity
107 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.3

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Huntsville, AL wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 16, 3:34 AM CDT, 2 hours 7 minutes earlier.

Area forecast discussion, Apr 16, 3:34 AM CDT, 2 hours 7 minutes before
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Hazardous weather outlook, Apr 16, 5:28 AM CDT, 13 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE HUNTSVILLE AL
528 AM CDT THU APR 16 2015

ALZ001>010-016-TNZ076-096-097-161800-
LAUDERDALE-COLBERT-FRANKLIN AL-LAWRENCE-LIMESTONE-MADISON-MORGAN-
MARSHALL-JACKSON-DEKALB-CULLMAN-MOORE-LINCOLN-FRANKLIN TN-
528 AM CDT THU APR 16 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH ALABAMA AND PORTIONS
OF SOUTHERN MIDDLE TENNESSEE.

.DAY ONE...TODAY AND TONIGHT...

SCATTERED SHOWERS AND THUNDERSTORMS WILL CONTINUE THROUGH THE THE
MORNING...AS AN UPPER LEVEL DISTURBANCE MOVES NORTHEAST ACROSS THE
AREA. SOME OF THE STORMS MAY BE STRONG...WITH BRIEF WIND GUSTS UP TO
50 MPH AND SMALL HAIL. THE COVERAGE AND INTENSITY OF THUNDERSTORMS
SHOULD DIMINISH BY THE AFTERNOON.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY...

SEVERAL ADDITIONAL DISTURBANCES WILL IMPACT THE TENNESSEE VALLEY LATE
THIS WEEK AND THIS WEEKEND...WITH A CHANCE OF THUNDERSTORMS
CONTINUING THROUGH MONDAY. ALTHOUGH A THREAT FOR STRONG TO MARGINALLY
SEVERE STORMS WILL EXIST THROUGH THE PERIOD...SPECIFIC DETAILS ON
WHEN THIS WILL OCCUR ARE UNCLEAR AT THIS TIME RANGE.

.SPOTTER CALL TO ACTION STATEMENT...

ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT PERSONNEL IS
NOT ANTICIPATED AT THIS TIME.

In the hours before

Special weather statement, Apr 16, 4:06 AM CDT, 1 hour 35 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
406 AM CDT THU APR 16 2015

ALZ005-007-160945-
MORGAN AL-LIMESTONE AL-
406 AM CDT THU APR 16 2015

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN MORGAN AND
SOUTHEASTERN LIMESTONE COUNTIES UNTIL 445 AM CDT...

AT 406 AM CDT...DOPPLER RADAR INDICATED A COUPLE OF STRONG
THUNDERSTORMS IN THE ADVISORY AREA. ONE CELL WAS LOCATED NEAR
TRINITY...OR NEAR DECATUR...WITH THE OTHER CELL NEAR ATHENS. BOTH
STORMS WERE MOVING NORTHEAST AT 25 MPH.

PEA SIZE HAIL AND WIND GUSTS OF 30 TO 40 MPH WILL BE POSSIBLE WITH
THESE STORMS.

LOCATIONS IMPACTED INCLUDE...
DECATUR...MADISON...ATHENS...HARTSELLE...PRICEVILLE...TRINITY...
TANNER...HARVEST...MOORESVILLE AND BASHAM.

THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND
TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.

LAT...LON 3486 8678 3465 8679 3442 8702 3449 8711
      3467 8711 3487 8694
TIME...MOT...LOC 0904Z 221DEG 22KT 3455 8704

70/DD
Special weather statement, Apr 16, 4:42 AM CDT, 59 minutes before
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Special weather statement, Apr 16, 4:50 AM CDT, 51 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
450 AM CDT THU APR 16 2015

ALZ007-016-161015-
CULLMAN AL-MORGAN AL-
450 AM CDT THU APR 16 2015

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN CULLMAN AND
SOUTHWESTERN MORGAN COUNTIES UNTIL 515 AM CDT...

AT 450 AM CDT...DOPPLER RADAR INDICATED SEVERAL CLUSTERS OF STRONG
THUNDERSTORMS IN THE ADVISORY AREA. THE STRONGEST CELL WAS LOCATED
NEAR SARDIS...OR 9 MILES NORTHWEST OF CULLMAN. ALL STORMS WERE
MOVING NORTHEAST AT 30 MPH.

PENNY SIZE HAIL AND WIND GUSTS OF 30 TO 40 MPH WILL BE POSSIBLE WITH
THESE STORMS.

LOCATIONS IMPACTED INCLUDE...
DECATUR...HARTSELLE...PRICEVILLE...FALKVILLE...SARDIS...BALDWIN...
SOMERVILLE...WEST POINT...JONES CHAPEL AND BATTLEGROUND.

THESE STORMS MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO
AND TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.

LAT...LON 3411 8699 3421 8711 3424 8711 3453 8692
      3444 8669
TIME...MOT...LOC 0948Z 213DEG 25KT 3424 8699

70/DD
Special weather statement, Apr 16, 5:13 AM CDT, 28 minutes before
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Special weather statement, Apr 16, 5:16 AM CDT, 25 minutes before
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Special weather statement, Apr 16, 5:24 AM CDT, 17 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
524 AM CDT THU APR 16 2015

ALZ006-161115-
MADISON AL-
524 AM CDT THU APR 16 2015

...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL MADISON COUNTY UNTIL
615 AM CDT...

AT 524 AM CDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM OVER
MADISON...MOVING NORTHEAST AT 30 MPH.

PEA SIZE HAIL AND WIND GUSTS OF 45 TO 50 MPH WILL BE POSSIBLE WITH
THIS STORM.

LOCATIONS IMPACTED INCLUDE...
HUNTSVILLE...MADISON...REDSTONE ARSENAL...TRIANA...MARSHALL SPACE
FLIGHT CENTER AND UNIVERSITY OF ALABAMA IN HUNTSVILLE.

THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND
TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.

LAT...LON 3485 8668 3468 8655 3458 8671 3459 8671
      3458 8673 3473 8679
TIME...MOT...LOC 1024Z 223DEG 25KT 3470 8671

70/DD

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 16, 3:37 AM CDTSpecial Weather StatementHUNFranklin23 min
Apr 16, 3:54 AM CDTSpecial Weather StatementHUNColbert36 min
Apr 16, 4:06 AM CDTSpecial Weather StatementHUNLimestone39 min
Apr 16, 4:42 AM CDTSpecial Weather StatementHUNLimestone33 min
Apr 16, 4:50 AM CDTSpecial Weather StatementHUNMorgan25 min
Apr 16, 5:13 AM CDTSpecial Weather StatementHUNMadison32 min
Apr 16, 5:16 AM CDTSpecial Weather StatementHUNMorgan29 min
Apr 16, 5:24 AM CDTSpecial Weather StatementHUNMadison51 min
Apr 16, 6:16 AM CDTSpecial Weather StatementHUNMadison44 min
Apr 16, 6:56 AM CDTSpecial Weather StatementHUNMadison49 min
Apr 16, 7:33 AM CDTAreal Flood WarningHUNLimestone, Madison8 hr
Apr 16, 7:52 AM CDTSpecial Weather StatementHUNJackson23 min
Apr 16, 7:56 AM CDTSpecial Weather StatementHUNMadison49 min
Apr 16, 8:22 AM CDTSpecial Weather StatementHUNJackson38 min
Apr 16, 8:30 AM CDTSpecial Weather StatementHUNMadison45 min
Apr 16, 8:45 AM CDTSpecial Weather StatementHUNJackson45 min
Apr 16, 8:59 AM CDTAreal Flood WarningHUNJackson, Madison3 hr
Apr 16, 1:50 PM CDTAreal Flood WarningHUNCullman3 hr
Apr 16, 3:32 PM CDTAreal Flood WarningHUNLimestone, Madison3 hr
Apr 16, 6:48 AM CDTSpecial Weather StatementHUNFranklin27 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2015Every 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.