Alert archive / Alabama / Tornado Warnings in 2010

Tornado Warning 27, NWS Huntsville, AL

May 2, 2010Franklin County, Alabama

NWS Huntsville, AL issued this tornado warning at May 2, 2010, 5:17 PM CDT for Franklin County, Alabama. It was in force for 28 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 2, 2010, 5:17 PM CDT (22:17 UTC)
Expired: May 2, 2010, 5:45 PM CDT
In force: 28 min
Issued by: NWS Huntsville, AL
Area: Storm-based polygon

County Franklin County, AL

The radar

The Columbus AFB radar (KGWX), 75 km from the middle of the area, began a volume at 22:18 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
May 2, 11:57 AM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 10.3 hours before the alert went out and 171 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: 147 J/kg
Mixed-layer CIN: -137 J/kg
Mixed-layer LCL: 576 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 298 m²/s²
0-3 km storm-relative helicity: 358 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 3.3

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 2, 3:35 PM CDT, 1 hour 42 minutes earlier.

Area forecast discussion, May 2, 3:35 PM CDT, 1 hour 42 minutes before

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Hazardous weather outlook, May 2, 1:09 PM CDT, 4 hours 8 minutes before

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In the hours before

Special weather statement, May 2, 2:12 PM CDT, 3 hours 5 minutes before

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Special weather statement, May 2, 2:24 PM CDT, 2 hours 53 minutes before

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Special weather statement, May 2, 2:44 PM CDT, 2 hours 33 minutes before

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Local storm report, May 2, 2:45 PM CDT, 2 hours 32 minutes before

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Special weather statement, May 2, 3:12 PM CDT, 2 hours 5 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
312 PM CDT SUN MAY 2 2010

ALZ009-TNZ097-022100-
FRANKLIN-JACKSON-
312 PM CDT SUN MAY 2 2010

...SIGNIFICANT WEATHER ADVISORY FOR FRANKLIN AND JACKSON COUNTIES
UNTIL 400 PM CDT...

AT 311 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM NEAR TRENTON...OR 13 MILES WEST OF SCOTTSBORO...
MOVING NORTHEAST AT 50 MPH.

WINDS UP TO 50 MPH ARE EXPECTED WITH THIS STORM.

* LOCATIONS IN OR NEAR THE PATH INCLUDE...
  ESTILLFORK...LARKIN.
  HYTOP...JERICHO.
  BASS...STEVENSON.
  ANDERSON.
  SHERWOOD...RUSSELL CAVE NATIONAL MONUMENT.
  LONG ISLAND.

RAINFALL AMOUNTS AROUND ONE INCH ARE POSSIBLE FROM THIS
THUNDERSTORM. THIS MAY RESULT IN BRIEF RUNOFF PROBLEMS AND PONDING
OF WATER ON AREA ROADWAYS.

&&

LAT...LON 3461 8619 3461 8622 3472 8635 3476 8633
      3485 8634 3521 8587 3500 8587 3500 8561
      3497 8560
TIME...MOT...LOC 2011Z 225DEG 50KT 3477 8621

KDW

Special weather statement, May 2, 4:48 PM CDT, 29 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, 8:12 PM CDT	Tornado Warning	HUN	Colbert, Lauderdale	33 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, 5:38 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.