Alert archive / Tennessee / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 302, NWS Huntsville, AL

October 18, 2011Lincoln County, Moore County, Tennessee

NWS Huntsville, AL issued this severe thunderstorm warning at Oct 18, 2011, 2:37 PM CDT for Lincoln County, Moore County, Tennessee. It was in force for 23 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: Oct 18, 2011, 2:37 PM CDT (19:37 UTC)
Expired: Oct 18, 2011, 3:00 PM CDT
In force: 23 min
Issued by: NWS Huntsville, AL
Area: Storm-based polygon

Counties Lincoln County, TN, Moore County, TN

The radar

The Northeast Alabama radar (KHTX), 47 km from the middle of the area, began a volume at 19:40 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 12:00Z, 7.6 hours before the alert went out and 103 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: 142 J/kg
Mixed-layer CIN: -151 J/kg
Mixed-layer LCL: 1391 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 100 m²/s²
0-3 km storm-relative helicity: 109 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 Oct 18, 12:28 PM CDT, 2 hours 9 minutes earlier.

Area forecast discussion, Oct 18, 12:28 PM CDT, 2 hours 9 minutes before

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Hazardous weather outlook, Oct 18, 11:53 AM CDT, 2 hours 44 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE HUNTSVILLE AL
1153 AM CDT TUE OCT 18 2011

ALZ001>010-016-TNZ076-096-097-190600-
LAUDERDALE-COLBERT-FRANKLIN AL-LAWRENCE-LIMESTONE-MADISON-MORGAN-
MARSHALL-JACKSON-DEKALB-CULLMAN-MOORE-LINCOLN-FRANKLIN TN-
1153 AM CDT TUE OCT 18 2011

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

.DAY ONE...THIS AFTERNOON AND TONIGHT...

SCATTERED SHOWERS AND THUNDERSTORMS WILL DEVELOP ACROSS THE
TENNESSEE VALLEY THIS AFTERNOON AHEAD OF A STRONG COLD FRONT. THE
SEVERE THREAT REMAINS LOW HOWEVER...A FEW STORMS COULD BE CAPABLE
OF PRODUCING STRONG WIND GUSTS TO 45 MPH AND HAIL UP TO 3/4 INCH IN
DIAMETER.

ANY SEVERE THREAT WILL DIMINISH AFTER SUNSET THIS EVENING HOWEVER...
SHOWERS AND A FEW THUNDERSTORMS WILL CONTINUE ACROSS THE AREA
THROUGH MUCH OF THE NIGHT. GENERAL RAINFALL AMOUNTS ARE EXPECTED TO
BE BETWEEN 1/4 AND 3/4 OF AN INCH. LOCALLY HIGHER AMOUNTS ARE
POSSIBLE...ESPECIALLY ALONG THE I-59 CORRIDOR BETWEEN SAND AND
LOOKOUT MOUNTAINS.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY...

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

MUCH COLDER AIR WILL BE IN PLACE ACROSS THE TENNESSEE VALLEY BEHIND
THE COLD FRONT ON WEDNESDAY...WITH HIGH TEMPERATURES HOVERING IN THE
LOWER 50S. THERE IS A CHANCE FOR FROST DEVELOPING BOTH FRIDAY AND
SATURDAY MORNINGS...MAINLY IN RURAL WIND SHELTERED LOCATIONS. A
LIGHT FREEZE CANNOT BE RULED OUT IN SOME OF THE COLDEST LOCATIONS...
LIKE LOWER VALLEYS...ON SATURDAY MORNING.

.SPOTTER CALL TO ACTION STATEMENT...

ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT PERSONNEL IS
NOT EXPECTED THIS AFTERNOON AND TONIGHT.

JMS/DJN

In the hours before

Special weather statement, Oct 18, 1:45 PM CDT, 52 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
145 PM CDT TUE OCT 18 2011

ALZ006-TNZ096-181915-
LINCOLN-MADISON-
145 PM CDT TUE OCT 18 2011

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN LINCOLN AND NORTHWEST
MADISON COUNTIES UNTIL 215 PM CDT...

AT 144 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT
THUNDERSTORMS WERE RAPIDLY DEVELOPING NEAR GLADSTONE...OR 7 MILES
WEST OF MERIDIANVILLE...MOVING NORTHEAST AT 25 MPH.

PEA SIZE HAIL AND HEAVY DOWNPOURS ARE EXPECTED WITH THESE STORMS.

* LOCATIONS IN OR NEAR THE PATH INCLUDE...
  ELKWOOD...HAZEL GREEN.
  FISK...TAFT.
  BELLEVIEW...LINCOLN.
  SKINEM...CARMARGO.

SEEK SHELTER AND STAY AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

&&

LAT...LON 3511 8640 3476 8659 3477 8679 3493 8679
      3511 8673
TIME...MOT...LOC 1844Z 200DEG 21KT 3490 8668

DJN

Special weather statement, Oct 18, 2:12 PM CDT, 25 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
212 PM CDT TUE OCT 18 2011

TNZ076-096-182000-
LINCOLN-MOORE-
212 PM CDT TUE OCT 18 2011

...SIGNIFICANT WEATHER ADVISORY FOR LINCOLN AND MOORE COUNTIES UNTIL
300 PM CDT...

AT 212 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
STRONG THUNDERSTORMS NEAR BELLEVIEW...OR 10 MILES SOUTH OF
FAYETTEVILLE...MOVING NORTHEAST AT 30 MPH.

PEA SIZE HAIL AND HEAVY DOWNPOURS ARE EXPECTED WITH THIS STORM.

* LOCATIONS IN OR NEAR THE PATH INCLUDE...
  CRYSTAL SPRINGS.
  MOLINO...FAYETTEVILLE.
  KELSO...SMITHLAND.
  MULBERRY...MIMOSA.

SEEK SHELTER AND STAY AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

&&

LAT...LON 3540 8626 3536 8624 3499 8645 3500 8671
      3536 8655 3536 8649 3533 8645 3533 8642
      3535 8641 3537 8634 3541 8629
TIME...MOT...LOC 1912Z 203DEG 25KT 3504 8657

DJN

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 18, 1:45 PM CDT	Special Weather Statement	HUN	Madison	30 min
Oct 18, 3:24 PM CDT	Special Weather Statement	HUN	Colbert, Lauderdale	51 min
Oct 18, 4:11 PM CDT	Special Weather Statement	HUN	Limestone	49 min
Oct 18, 4:43 PM CDT	Special Weather Statement	HUN	Lawrence	47 min
Oct 18, 4:56 PM CDT	Special Weather Statement	HUN	Limestone	49 min
Oct 18, 5:43 PM CDT	Special Weather Statement	HUN	Madison	47 min
Oct 18, 2:12 PM CDT	Special Weather Statement	HUN	Lincoln, Moore	48 min
Oct 18, 2:32 PM CDT	Severe Thunderstorm Warning	HUN	Lincoln, Moore	28 min
Oct 18, 2:59 PM CDT	Severe Thunderstorm Warning	HUN	Franklin	16 min
Oct 18, 5:37 PM CDT	Special Weather Statement	HUN	Moore	53 min
Oct 18, 6:27 PM CDT	Special Weather Statement	HUN	Franklin	48 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 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; radar from the NEXRAD Level II archive.