Alert archive / Tennessee / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 169, NWS Memphis, TN

June 11, 2009Decatur County, Tennessee

NWS Memphis, TN issued this severe thunderstorm warning at Jun 11, 2009, 7:17 AM CDT for Decatur County, Tennessee. 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: Jun 11, 2009, 7:17 AM CDT (12:17 UTC)
Expired: Jun 11, 2009, 7:45 AM CDT
In force: 28 min
Issued by: NWS Memphis, TN
Area: Storm-based polygon

County Decatur County, TN

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 0.3 hours before the alert went out and 148 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: 2748 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 587 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 76 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 4.5

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 Memphis, TN wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 11, 6:23 AM CDT, 54 minutes earlier.

Area forecast discussion, Jun 11, 6:23 AM CDT, 54 minutes before

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Hazardous weather outlook, Jun 11, 4:53 AM CDT, 2 hours 24 minutes before

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In the hours before

Special weather statement, Jun 11, 2:45 AM CDT, 4 hours 32 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MEMPHIS TN
245 AM CDT THU JUN 11 2009

MSZ008-012-110815-
TATE MS-PANOLA MS-
245 AM CDT THU JUN 11 2009

...THIS SIGNIFICANT WEATHER ALERT IS FOR...

  NORTHERN PANOLA COUNTY IN NORTHWEST MISSISSIPPI...
  CENTRAL TATE COUNTY IN NORTHWEST MISSISSIPPI...

A STRONG THUNDERSTORM PRODUCING PEA TO DIME SIZE HAIL AND 40 TO 50
MPH WINDS WAS LOCATED 4 MILES SOUTHWEST OF COMO AT 245 AM CDT...
MOVING NORTHEAST AT 35 MPH.

THIS STORM IS NOT EXPECTED TO BECOME SEVERE AND NO WARNINGS ARE
ANTICIPATED.

PEOPLE IN PANOLA AND TATE COUNTIES...INCLUDING LOCATIONS NEAR JOHN W
KYLE STATE PARK AND SENATOBIA...SHOULD MONITOR THIS STORM CLOSELY.

Special weather statement, Jun 11, 3:25 AM CDT, 3 hours 52 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MEMPHIS TN
325 AM CDT THU JUN 11 2009

ARZ036-048-110900-
ST. FRANCIS AR-CRITTENDEN AR-
325 AM CDT THU JUN 11 2009

...THIS SIGNIFICANT WEATHER ALERT IS FOR...

  SOUTH CENTRAL CRITTENDEN COUNTY IN EASTERN ARKANSAS...
  EASTERN ST. FRANCIS COUNTY IN EASTERN ARKANSAS...

A STRONG THUNDERSTORM PRODUCING 40 TO 50 MPH WINDS WAS LOCATED 6
MILES WEST OF HUGHES AT 326 AM CDT...MOVING NORTHEAST AT 45 MPH.

VERY HEAVY RAIN ALONG WITH CONTINUOUS CLOUD TO GROUND LIGHTNING ARE
ALSO POSSIBLE WITH THIS THUNDERSTORM.

THIS STORM IS NOT EXPECTED TO BECOME SEVERE AND NO WARNINGS ARE
ANTICIPATED.

PEOPLE IN CRITTENDEN AND ST. FRANCIS COUNTIES...INCLUDING LOCATIONS
NEAR HUGHES...SHOULD MONITOR THIS STORM CLOSELY. THIS SIGNIFICANT
WEATHER ALERT ALSO INCLUDES HORSESHOE LAKE.

Special weather statement, Jun 11, 4:13 AM CDT, 3 hours 4 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MEMPHIS TN
413 AM CDT THU JUN 11 2009

MSZ001-002-008-110945-
DE SOTO MS-MARSHALL MS-TATE MS-
413 AM CDT THU JUN 11 2009

...THIS SIGNIFICANT WEATHER ALERT IS FOR...

  DESOTO COUNTY IN NORTHWEST MISSISSIPPI...
  WESTERN MARSHALL COUNTY IN NORTHWEST MISSISSIPPI...
  TATE COUNTY IN NORTHWEST MISSISSIPPI...

A STRONG THUNDERSTORM PRODUCING 40 TO 50 MPH WINDS WAS LOCATED 4
MILES SOUTHEAST OF EUDORA AT 413 AM CDT...MOVING NORTHEAST AT 35 MPH.

THIS STORM IS NOT EXPECTED TO BECOME SEVERE AND NO WARNINGS ARE
ANTICIPATED.

PEOPLE IN DESOTO...MARSHALL AND TATE COUNTIES...INCLUDING LOCATIONS
NEAR HERNANDO...HORN LAKE...OLIVE BRANCH...SENATOBIA AND SOUTHAVEN...
SHOULD MONITOR THIS STORM CLOSELY. THIS SIGNIFICANT WEATHER ALERT
ALSO INCLUDES ARKABUTLA LAKE AND HORN LAKE.

Local storm report, Jun 11, 4:50 AM CDT, 2 hours 27 minutes before

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Special weather statement, Jun 11, 5:12 AM CDT, 2 hours 5 minutes before

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Special weather statement, Jun 11, 6:14 AM CDT, 1 hour 3 minutes before

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The office that day

Everything else NWS Memphis, TN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 11, 2:23 AM CDT	Severe Thunderstorm Warning	MEG	Coahoma	52 min
Jun 11, 3:12 AM CDT	Severe Thunderstorm Warning	MEG	Coahoma, Quitman, Tunica	48 min
Jun 11, 3:33 AM CDT	Severe Thunderstorm Warning	MEG	DeSoto, Panola, Quitman, Tate, Tunica	42 min
Jun 11, 3:48 AM CDT	Severe Thunderstorm Warning	MEG	Shelby	46 min
Jun 11, 2:56 AM CDT	Severe Thunderstorm Warning	MEG	Lee, St. Francis	49 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2009 Every severe thunderstorm warning in 2009

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.