Alert archive / Alabama / Tornado Warnings in 2010

Tornado Warning 25, NWS Huntsville, AL

May 1, 2010Colbert County, Lauderdale County, Alabama

NWS Huntsville, AL issued this tornado warning at May 1, 2010, 8:12 PM CDT for Colbert County, Lauderdale County, Alabama. It was in force for 33 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: May 1, 2010, 8:12 PM CDT (01:12 UTC)
Expired: May 1, 2010, 8:45 PM CDT
In force: 33 min
Issued by: NWS Huntsville, AL
Area: Storm-based polygon

Counties Colbert County, AL, Lauderdale County, AL

The radar

The Columbus AFB radar (KGWX), 115 km from the middle of the area, began a volume at 01:14 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, 1.2 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: 1 J/kg
Mixed-layer CIN: -200 J/kg
Mixed-layer LCL: 562 m above ground
0-6 km bulk shear: 77 kt
0-1 km storm-relative helicity: -5 m²/s²
0-3 km storm-relative helicity: 62 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this tornado 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 tornado warning went out at May 1, 6:14 PM CDT, 1 hour 58 minutes earlier.

Area forecast discussion, May 1, 6:14 PM CDT, 1 hour 58 minutes before

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Hazardous weather outlook, May 1, 6:28 PM CDT, 1 hour 44 minutes before

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In the hours before

Local storm report, May 1, 3:10 PM CDT, 5 hours 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
310 PM CDT SAT MAY 01 2010

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

0307 PM     HAIL             WATERLOO                34.92N 88.06W
05/01/2010  E1.00 INCH       LAUDERDALE         AL   AMATEUR RADIO

            QUARTER-SIZED HAIL REPORTED IN WATERLOO.

&&

KWEBER

Local storm report, May 1, 3:22 PM CDT, 4 hours 50 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE HUNTSVILLE AL
322 PM CDT SAT MAY 01 2010

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

0307 PM     HAIL             WATERLOO                34.92N 88.06W
05/01/2010  E1.00 INCH       LAUDERDALE         AL   AMATEUR RADIO

            QUARTER-SIZED HAIL REPORTED IN WATERLOO.

0314 PM     FUNNEL CLOUD     1 NNW CHEROKEE          34.77N 87.97W
05/01/2010                   COLBERT            AL   TRAINED SPOTTER

            TRAINED SPOTTER LOCATED NORTH OF CHEROKEE REPORTED FUNNEL
            CLOUD.

0315 PM     HAIL             CHEROKEE                34.76N 87.97W
05/01/2010  E1.00 INCH       COLBERT            AL   AMATEUR RADIO

            QUARTER INCH HAIL WAS REPORTED JUST NORTH OF CHEROKEE.

&&

KWEBER

Local storm report, May 1, 3:52 PM CDT, 4 hours 20 minutes before

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Local storm report, May 1, 6:43 PM CDT, 1 hour 29 minutes before

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Special weather statement, May 1, 7:46 PM CDT, 26 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
May 1, 7:46 PM CDT	Special Weather Statement	HUN	Colbert, Franklin	29 min
May 1, 8:41 PM CDT	Tornado Warning	HUN	Lauderdale	23 min
May 1, 9:36 PM CDT	River Flood Watch	HUN	Lawrence	27 hr
May 2, 8:02 AM CDT	River Flood Warning	HUN	Colbert, Lauderdale	3 days
May 2, 9:47 AM CDT	Special Weather Statement	HUN	Lauderdale	58 min
May 2, 11:08 AM CDT	River Flood Watch	HUN	Madison	36 hr
May 2, 11:34 AM CDT	Special Weather Statement	HUN	Colbert, Lauderdale	41 min
May 2, 11:44 AM CDT	Flash Flood Warning	HUN	Colbert, Franklin, Lauderdale	12 hr
May 2, 12:24 PM CDT	Special Weather Statement	HUN	Colbert, Lauderdale	66 min
May 2, 1:47 PM CDT	Special Weather Statement	HUN	Cullman	28 min
May 2, 1:51 PM CDT	Special Weather Statement	HUN	Colbert, Lauderdale	39 min
May 2, 2:12 PM CDT	Special Weather Statement	HUN	Cullman, Morgan	33 min
May 2, 2:44 PM CDT	Special Weather Statement	HUN	Madison	31 min
May 2, 3:12 PM CDT	Special Weather Statement	HUN	Jackson	48 min
May 2, 4:48 PM CDT	Special Weather Statement	HUN	Colbert, Franklin, Lauderdale	42 min
May 2, 5:17 PM CDT	Tornado Warning	HUN	Franklin	28 min
May 2, 5:38 PM CDT	Severe Thunderstorm Warning	HUN	Colbert, Lauderdale	37 min
May 2, 5:40 PM CDT	Severe Thunderstorm Warning	HUN	Franklin, Lawrence	35 min
May 2, 5:54 PM CDT	Severe Thunderstorm Warning	HUN	Colbert, Franklin	22 min
May 1, 9:18 PM CDT	River Flood Watch	HUN	Franklin, Lincoln	28 hr

Nearby

Tornado Warnings in Alabama, 2010 Every tornado warning in 2010 Tornadoes in 2010

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.