Alert archive / Alabama / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 14, NWS Huntsville, AL

February 20, 2014Jackson County, Alabama

NWS Huntsville, AL issued this severe thunderstorm warning at Feb 20, 2014, 11:14 PM CST for Jackson County, Alabama. It was in force for 46 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: Feb 20, 2014, 11:14 PM CST (05:14 UTC)
Expired: Feb 21, 2014, 12:00 AM CST
In force: 46 min
Issued by: NWS Huntsville, AL
Area: Storm-based polygon

County Jackson County, AL

The radar

The Northeast Alabama radar (KHTX), 19 km from the middle of the area, began a volume at 05:16 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
Feb 20, 6:49 PM CST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 5.2 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: 231 J/kg
Mixed-layer CIN: -78 J/kg
Mixed-layer LCL: 1039 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 346 m²/s²
0-3 km storm-relative helicity: 386 m²/s²
Significant tornado parameter: 0.4
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 Feb 20, 10:58 PM CST, 16 minutes earlier.

Area forecast discussion, Feb 20, 10:58 PM CST, 16 minutes before

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Hazardous weather outlook, Feb 20, 11:04 PM CST, 10 minutes before

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In the hours before

Local storm report, Feb 20, 10:44 PM CST, 30 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
1044 PM CST THU FEB 20 2014

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1025 PM     TSTM WND DMG     3 E PETERSBURG          35.32N 86.58W
02/20/2014                   LINCOLN            TN   EMERGENCY MNGR

            TREES WERE REPORTED DOWN ON PETERSBURG CHESTNUT RIDGE
            ROAD.

&&

KWEBER

Local storm report, Feb 20, 10:46 PM CST, 28 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
1046 PM CST THU FEB 20 2014

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1036 PM     TSTM WND GST     4 ESE HUNTSVILLE        34.71N 86.52W
02/20/2014  E71.00 MPH       MADISON            AL   TRAINED SPOTTER

            REPORT OF A WIND GUST TO 71 MPH. SOME TREES LIMBS BROKEN
            OFF ONTO ROADWAY.

&&

KWEBER

Special weather statement, Feb 20, 10:47 PM CST, 27 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
1047 PM CST THU FEB 20 2014

ALZ006>009-016-TNZ097-210530-
CULLMAN AL-MARSHALL AL-MORGAN AL-MADISON AL-JACKSON AL-FRANKLIN TN-
1047 PM CST THU FEB 20 2014

...SIGNIFICANT WEATHER ADVISORY FOR CULLMAN...NORTHWESTERN
MARSHALL...SOUTHEASTERN MORGAN...SOUTHEASTERN MADISON...NORTHWESTERN
JACKSON AND SOUTHEASTERN FRANKLIN COUNTIES UNTIL 1130 PM CST...

AT 1046 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 7 MILES
SOUTH OF MONTEAGLE TO 8 MILES NORTH OF CULLMAN...AND MOVING EAST AT
40 MPH.

HAIL UP TO THE SIZE OF NICKELS AND WIND GUSTS UP TO 50 MPH WILL BE
POSSIBLE WITH THESE STORMS.

LOCATIONS IMPACTED INCLUDE...
CULLMAN...ARAB...HANCEVILLE...NEW HOPE...SEWANEE...GOOD HOPE...
FALKVILLE...OWENS CROSSROADS...GURLEY...SKYLINE...WOODVILLE...
BAILEYTON...HOLLY POND...FAIRVIEW...EVA...SOUTH VINEMONT...COLONY...
SOMERVILLE...WEST POINT AND PAINT ROCK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

STRONG GUSTY WINDS WILL BE CAPABLE OF KNOCKING DOWN SMALL TREE
LIMBS...ALONG WITH OTHER SMALL UNSECURED ITEMS. SEEK SAFE SHELTER
UNTIL THIS LINE OF STORMS HAS PASSED.

&&

LAT...LON 3393 8689 3411 8711 3422 8711 3522 8590
      3520 8586 3499 8586 3499 8579 3393 8686
TIME...MOT...LOC 0443Z 266DEG 35KT 3513 8578 3429 8680

TT

Local storm report, Feb 20, 10:55 PM CST, 19 minutes before

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Local storm report, Feb 20, 10:56 PM CST, 18 minutes before

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Local storm report, Feb 20, 11:01 PM CST, 13 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 20, 7:00 PM CST	Special Weather Statement	HUN	Colbert	45 min
Feb 20, 7:26 PM CST	Severe Thunderstorm Warning	HUN	Lauderdale	34 min
Feb 20, 7:44 PM CST	Severe Thunderstorm Warning	HUN	Colbert, Franklin	31 min
Feb 20, 8:06 PM CST	Severe Thunderstorm Warning	HUN	Colbert, Lauderdale	39 min
Feb 20, 8:14 PM CST	Severe Thunderstorm Warning	HUN	Colbert, Franklin	46 min
Feb 20, 8:42 PM CST	Severe Thunderstorm Warning	HUN	Colbert, Lauderdale, Lawrence, Limestone	48 min
Feb 20, 8:46 PM CST	Severe Thunderstorm Warning	HUN	Franklin, Lawrence	29 min
Feb 20, 9:11 PM CST	Tornado Warning	HUN	Limestone	34 min
Feb 20, 9:14 PM CST	Severe Thunderstorm Warning	HUN	Limestone, Madison, Morgan	31 min
Feb 20, 9:21 PM CST	Severe Thunderstorm Warning	HUN	Cullman, Lawrence, Morgan	39 min
Feb 20, 9:34 PM CST	Severe Thunderstorm Warning	HUN	Madison, Morgan	26 min
Feb 20, 9:41 PM CST	Tornado Warning	HUN	Madison	49 min
Feb 20, 9:43 PM CST	Severe Thunderstorm Warning	HUN	Limestone, Madison	32 min
Feb 20, 9:52 PM CST	Flash Flood Warning	HUN	Franklin, Lawrence, Morgan	3 hr
Feb 20, 9:59 PM CST	Severe Thunderstorm Warning	HUN	Jackson, Madison	46 min
Feb 20, 10:01 PM CST	Severe Thunderstorm Warning	HUN	Cullman, Morgan	44 min
Feb 20, 10:06 PM CST	Flash Flood Warning	HUN	Limestone, Madison, Morgan	3 hr
Feb 20, 10:47 PM CST	Special Weather Statement	HUN	Cullman	43 min
Feb 20, 10:51 PM CST	Severe Thunderstorm Warning	HUN	Cullman	39 min
Feb 20, 11:43 PM CST	Severe Thunderstorm Warning	HUN	DeKalb, Jackson	32 min
Feb 21, 12:03 AM CST	Severe Thunderstorm Warning	HUN	DeKalb	42 min
Feb 21, 12:32 AM CST	Tornado Warning	HUN	DeKalb	43 min
Feb 21, 12:35 AM CST	Areal Flood Warning	HUN	Franklin, Lawrence, Limestone, Madison, Morgan	4 hr
Feb 21, 4:30 AM CST	Areal Flood Warning	HUN	Madison	6 hr
Feb 21, 10:40 AM CST	River Flood Warning	HUN	Jackson, Madison, Marshall	43 hr
Feb 21, 10:48 AM CST	River Flood Warning	HUN	Madison	9 hr
Feb 20, 10:11 PM CST	Tornado Warning	HUN	Franklin	49 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2014 Every severe thunderstorm warning in 2014

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.