Alert archive / Alabama / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 92, NWS Huntsville, AL

April 20, 2011Colbert County, Lauderdale County, Alabama

NWS Huntsville, AL issued this severe thunderstorm warning at Apr 20, 2011, 4:47 PM CDT for Colbert County, Lauderdale County, Alabama. It was in force for 25 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 20, 2011, 4:47 PM CDT (21:47 UTC)
Expired: Apr 20, 2011, 5:12 PM CDT
In force: 25 min
Issued by: NWS Huntsville, AL
Area: Storm-based polygon

Counties Colbert County, AL, Lauderdale County, AL

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 9.8 hours before the alert went out and 180 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1036 m above ground
0-6 km bulk shear: 65 kt
0-1 km storm-relative helicity: 305 m²/s²
0-3 km storm-relative helicity: 414 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

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 20, 3:27 PM CDT, 1 hour 20 minutes earlier.

Area forecast discussion, Apr 20, 3:27 PM CDT, 1 hour 20 minutes before

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Hazardous weather outlook, Apr 20, 12:45 PM CDT, 4 hours 2 minutes before

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In the hours before

Local storm report, Apr 20, 3:43 PM CDT, 1 hour 4 minutes before

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Local storm report, Apr 20, 3:44 PM CDT, 1 hour 3 minutes before

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Local storm report, Apr 20, 3:46 PM CDT, 1 hour 1 minute before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE HUNTSVILLE AL
346 PM CDT WED APR 20 2011

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

0520 AM     TSTM WND DMG     HARTSELLE               34.44N 86.94W
04/20/2011                   MORGAN             AL   FIRE DEPT/RESCUE

            SMALL SHED DOWN ON HWY 31. TREES DOWN ACROSS HARTSELLE.

&&

DJN

Local storm report, Apr 20, 4:35 PM CDT, 12 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
435 PM CDT WED APR 20 2011

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

0634 AM     TSTM WND DMG     4 ENE PISGAH            34.70N 85.77W
04/20/2011                   JACKSON            AL   EMERGENCY MNGR

            TRAILER FLIPPED OVER ON ITS TOP. SMALL SHEDS DESTROYED
            AND LARGE TREES DOWN IN VICINITY. ESTIMATED WINDS FROM
            RADAR AND DAMAGE OF 80 MPH. TRAILER WAS TIED DOWN. TIME
            ESTIMATED FROM RADAR.

&&

DJN

Local storm report, Apr 20, 4:38 PM CDT, 9 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
438 PM CDT WED APR 20 2011

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

0636 AM     TSTM WND DMG     ROSALIE                 34.70N 85.77W
04/20/2011                   JACKSON            AL   EMERGENCY MNGR

            LARGE TREES DOWN ON CHURCH IN ROSALIE ALONG HIGHWAY 71.
            NO INJURIES. SMALL OUTBUILDINGS AND SHEDS WERE DAMAGED IN
            VICINITY.

&&

DJN

Local storm report, Apr 20, 4:42 PM CDT, 5 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE HUNTSVILLE AL
442 PM CDT WED APR 20 2011

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

0330 AM     HAIL             SEWANEE                 35.20N 85.92W
04/20/2011  E0.50 INCH       FRANKLIN           TN   LAW ENFORCEMENT

0418 AM     LIGHTNING        RED BAY                 34.44N 88.14W
04/20/2011                   FRANKLIN           AL   EMERGENCY MNGR

            HOUSE STRUCK BY LIGHTNING IN THE TOWN OF RED BAY.

0435 AM     LIGHTNING        RUSSELLVILLE            34.51N 87.73W
04/20/2011                   FRANKLIN           AL   EMERGENCY MNGR

            HOUSE STRUCK BY LIGHTNING IN THE TOWN OF RUSSELLVILLE.

0435 AM     LIGHTNING        VINA                    34.38N 88.06W
04/20/2011                   FRANKLIN           AL   EMERGENCY MNGR

            CAR STRUCK BY LIGHTNING AND ON FIRE NEAR THE TOWN OF
            VINA.

0440 AM     TSTM WND DMG     8 NNE HALEYVILLE        34.35N 87.58W
04/20/2011                   FRANKLIN           AL   EMERGENCY MNGR

            NUMEROUS TREES AND POWERLINES DOWN ALONG HIGHWAY 243 AND
            COUNTY ROAD 79 DOWN TO WINSTON/MARION COUNTY LINE. TIME
            ESTIMATED FROM RADAR. ADDITIONAL DETAILS FROM FRANKLIN
            EMA WILL BE COMING IN.

0505 AM     TSTM WND GST     MOULTON                 34.48N 87.29W
04/20/2011  M62.00 MPH       LAWRENCE           AL   AMATEUR RADIO

            WIDESPREAD POWER OUTAGE IN MOULTON. TREES AND POWER LINES
            DOWN ESPECIALLY ALONG HWY 33 NORTH AND SOUTH. JOE WHEELER
            ELECTRIC COOP REPORTS 30 POLES OR LINES DOWN IN LAWRENCE
            AND MORGAN COUNTIES.

0515 AM     TSTM WND DMG     2 NW FLORETTE           34.44N 86.73W
04/20/2011                   MORGAN             AL   EMERGENCY MNGR

            *** 1 INJ *** TREE DOWN ON HOUSE. 1 INJURY.

0515 AM     TSTM WND DMG     5 E FALKVILLE           34.37N 86.82W
04/20/2011                   MORGAN             AL   TRAINED SPOTTER

            TREES DOWN AND SHED DESTROYED NEAR NAT KEY AND GANDY COVE
            RD.

0520 AM     TSTM WND DMG     HARTSELLE               34.44N 86.94W
04/20/2011                   MORGAN             AL   FIRE DEPT/RESCUE

            SMALL SHED DOWN ON HWY 31. TREES DOWN ACROSS HARTSELLE.

0520 AM     TSTM WND DMG     2 W FLORETTE            34.42N 86.73W
04/20/2011                   MORGAN             AL   EMERGENCY MNGR

            11 POWER POLES DOWN WITH POWER LINES DOWN ALONG HIGHWAY
            67 BETWEEN COUEY ROAD AND EVA ROAD.

0520 AM     TSTM WND DMG     CULLMAN                 34.17N 86.84W
04/20/2011                   CULLMAN            AL   EMERGENCY MNGR

            TREES AND POWER LINES DOWN IN CULLMAN. ONE TREE DOWN ON A
            HOUSE.

0528 AM     TSTM WND DMG     3 NNW HOLLY POND        34.21N 86.64W
04/20/2011                   CULLMAN            AL   EMERGENCY MNGR

            *** 1 INJ *** TREE DOWN ON A HOUSE NORTH OF HOLLY POND.
            ONE INJURY.

0530 AM     HAIL             5 NE WOODVILLE          34.67N 86.20W
04/20/2011  E1.00 INCH       JACKSON            AL   AMATEUR RADIO

            ON HWY 72 BETWEEN HUNTSVILLE AND SCOTTSBORO. QUARTER SIZE
            HAIL COVERING GROUND. CARS PULLING OFF ROAD.

0530 AM     TSTM WND DMG     2 ENE BELLE MINA        34.66N 86.84W
04/20/2011                   LIMESTONE          AL   EMERGENCY MNGR

            TREE DOWN ON MOBILE HOME. OCCUPANT UNINJURED.

0532 AM     TSTM WND DMG     3 NNW ARAB              34.36N 86.51W
04/20/2011                   MARSHALL           AL   EMERGENCY MNGR

            TREES DOWN AND POWER OUTAGE IN THE RUTH COMMUNITY. HWY
            231 NORTH OF ARAB.

0532 AM     TSTM WND DMG     2 NNW ARAB              34.34N 86.51W
04/20/2011                   MARSHALL           AL   EMERGENCY MNGR

            TREES DOWN AND POWER OUTAGE IN THE RUTH COMMUNITY HWY 231
            NORTH OF OF ARAB.

0535 AM     TSTM WND DMG     2 W UNION GROVE         34.40N 86.48W
04/20/2011                   MARSHALL           AL   EMERGENCY MNGR

            SEVERAL TREES DOWN NEAR BAMA DRIVE AND UNION CHAPEL ROAD
            INTERSECTION. ONE TREE FELL ON RESIDENCE AND ANOTHER OVER
            A FENCE AND ONTO ROAD. TIME ESTIMATED BASED ON RADAR.

0536 AM     TSTM WND DMG     2 N SCOTTSBORO          34.68N 86.04W
04/20/2011                   JACKSON            AL   EMERGENCY MNGR

            AT LARKINSVILLE COUNTY RD 529 AND COUNTY RD 30 ROOF BLOWN
            OFF VERY OLD HOUSE.

0540 AM     HAIL             GUNTERSVILLE            34.36N 86.29W
04/20/2011  E0.25 INCH       MARSHALL           AL   EMERGENCY MNGR

0550 AM     TSTM WND DMG     2 SE ARAB               34.30N 86.47W
04/20/2011                   MARSHALL           AL   EMERGENCY MNGR

            NUMEROUS REPORTS OF TREES DOWN SOUTHWEST OF ARAB.

0554 AM     TSTM WND DMG     5 ENE PISGAH            34.70N 85.77W
04/20/2011                   JACKSON            AL   EMERGENCY MNGR

            TREES BLOWN DOWN AT ROSALIE.

0600 AM     TSTM WND DMG     4 ENE CROSSVILLE        34.31N 85.93W
04/20/2011                   DEKALB             AL   EMERGENCY MNGR

            TREES DOWN AND BLOCKING ROADWAYS NEAR CR20 AND CR843.
            NEAR LAKEVIEW AND GERALDINE.

0604 AM     NON-TSTM WND GST 4 SW ALBERTVILLE        34.23N 86.26W
04/20/2011  M60.00 MPH       MARSHALL           AL   AWOS

0604 AM     NON-TSTM WND GST 4 SW ALBERTVILLE        34.23N 86.26W
04/20/2011  E60.00 MPH       MARSHALL           AL   AWOS

            ALBERTVILLE AWOS

0610 AM     NON-TSTM WND DMG GUNTERSVILLE            34.36N 86.29W
04/20/2011                   MARSHALL           AL   EMERGENCY MNGR

            NUMEROUS TREES DOWN IN THE STATE PARK AND ALONG THE
            ENTRANCE ON HWY 227.

0610 AM     NON-TSTM WND DMG 5 NW WHITON             34.40N 86.14W
04/20/2011                   MARSHALL           AL   EMERGENCY MNGR

            NUMEROUS TREES DOWN IN THE ASBURY COMMUNITY SPECIFICALLY
            ON MARTLING ROAD. NUMEROUS REPORTS ACROSS THE NORTH PART
            OF THE COUNTY.

0610 AM     NON-TSTM WND DMG GERALDINE               34.35N 86.00W
04/20/2011                   DEKALB             AL   EMERGENCY MNGR

            FEW REPORTS OF TREES DOWN ON HWY 227 BETWEEN GERALDINE
            AND GROVE OAK.

0615 AM     NON-TSTM WND DMG GUNTERSVILLE            34.36N 86.29W
04/20/2011                   MARSHALL           AL   EMERGENCY MNGR

            NUMEROUS TREES DOWN IN AND AROUND GUNTERSVILLE INCLUDING
            THE FOLLOWING LOCATIONS GEORGIA MTN RD, CHALLAKEY RD, AND
            WISE MTN RD. TREES DOWN ON HOUSE AT CREEK PASS RD AND ON
            HOUSE AT SUNSET DR. NO INJURIES.

0630 AM     TSTM WND DMG     1 WSW LARKINSVILLE      34.69N 86.15W
04/20/2011                   JACKSON            AL   FIRE DEPT/RESCUE

            METAL ROOF PULLED OFF HOUSE ON CR529 AND CR30 AND ONTO
            POWER LINE.

0630 AM     NON-TSTM WND DMG 4 W ALBERTVILLE         34.27N 86.29W
04/20/2011                   MARSHALL           AL   EMERGENCY MNGR

            PLEASANT GROVE AREA. TREES DOWN ALONG ONEONTA CUTOFF RD
            AND NIXON CHAPEL RD.

0634 AM     TSTM WND DMG     4 ENE PISGAH            34.70N 85.77W
04/20/2011                   JACKSON            AL   EMERGENCY MNGR

            TRAILER FLIPPED OVER ON ITS TOP. SMALL SHEDS DESTROYED
            AND LARGE TREES DOWN IN VICINITY. ESTIMATED WINDS FROM
            RADAR AND DAMAGE OF 80 MPH. TRAILER WAS TIED DOWN. TIME
            ESTIMATED FROM RADAR.

0636 AM     TSTM WND DMG     ROSALIE                 34.70N 85.77W
04/20/2011                   JACKSON            AL   EMERGENCY MNGR

            LARGE TREES DOWN ON CHURCH IN ROSALIE ALONG HIGHWAY 71.
            NO INJURIES. SMALL OUTBUILDINGS AND SHEDS WERE DAMAGED IN
            VICINITY.

0638 AM     TSTM WND DMG     SCOTTSBORO              34.67N 86.03W
04/20/2011                   JACKSON            AL   EMERGENCY MNGR

            TREES DOWN ALONG KYLE STREET IN SCOTTSBORO. LARGE POWER
            OUTAGE.

0639 AM     TSTM WND DMG     FYFFE                   34.45N 85.90W
04/20/2011                   DEKALB             AL   EMERGENCY MNGR

            NUMEROUS REPORTS OF TREES AND POWER LINES DOWN IN FYFFE,
            TENBROECK COMMUNITY, DOG TOWN, AND PEAKS CORNER

0639 AM     TSTM WND DMG     3 WSW IDER              34.69N 85.72W
04/20/2011                   DEKALB             AL   EMERGENCY MNGR

            TREES DOWN ALONG CR769 AND CR371 NEAR IDER.

0645 AM     TSTM WND DMG     3 SSE IDER              34.67N 85.65W
04/20/2011                   DEKALB             AL   EMERGENCY MNGR

            PARTIAL ROOF PULLED UP ON RESIDENCE WITH LARGE TREE
            BRANCHES SNAPPED ALONG COUNTY ROAD 651.

0645 AM     TSTM WND DMG     2 SSE IDER              34.67N 85.64W
04/20/2011                   DEKALB             AL   EMERGENCY MNGR

            TREE DOWN ON MOBILE HOME ALONG CR 651. NO INJURIES.

&&

DJN

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 20, 1:52 AM CDT	Special Weather Statement	HUN	Lauderdale	38 min
Apr 20, 3:55 AM CDT	Severe Thunderstorm Warning	HUN	Franklin	35 min
Apr 20, 4:05 AM CDT	Special Weather Statement	HUN	Limestone, Madison	25 min
Apr 20, 4:16 AM CDT	Severe Thunderstorm Warning	HUN	Colbert, Franklin	29 min
Apr 20, 4:29 AM CDT	Severe Thunderstorm Warning	HUN	Colbert, Franklin, Lawrence, Limestone	31 min
Apr 20, 4:44 AM CDT	Special Weather Statement	HUN	Jackson	31 min
Apr 20, 4:56 AM CDT	Severe Thunderstorm Warning	HUN	Cullman, Lawrence, Morgan	34 min
Apr 20, 4:59 AM CDT	Special Weather Statement	HUN	Limestone	31 min
Apr 20, 5:19 AM CDT	Severe Thunderstorm Warning	HUN	Cullman, Limestone, Madison, Marshall, Morgan	41 min
Apr 20, 5:25 AM CDT	Severe Thunderstorm Warning	HUN	Jackson, Madison	35 min
Apr 20, 5:33 AM CDT	Severe Thunderstorm Warning	HUN	DeKalb, Jackson, Madison, Marshall	27 min
Apr 20, 5:59 AM CDT	Special Weather Statement	HUN	DeKalb, Jackson	46 min
Apr 20, 6:08 AM CDT	High Wind Warning	HUN	Cullman, DeKalb, Jackson, Marshall, Morgan	61 min
Apr 20, 6:29 AM CDT	Severe Thunderstorm Warning	HUN	DeKalb, Jackson	16 min
Apr 20, 6:42 AM CDT	Severe Thunderstorm Warning	HUN	DeKalb	18 min
Apr 20, 1:38 PM CDT	Flash Flood Watch	HUN	Colbert, Cullman, DeKalb, Franklin, Jackson, Lauderdale and 5 more	14 hr
Apr 20, 6:51 PM CDT	Special Weather Statement	HUN	Franklin	39 min
Apr 20, 2:54 AM CDT	Special Weather Statement	HUN	Moore	21 min
Apr 20, 3:27 AM CDT	Special Weather Statement	HUN	Franklin	48 min
Apr 20, 4:45 AM CDT	Special Weather Statement	HUN	Franklin, Moore	45 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2011 Every severe thunderstorm warning in 2011

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.