Alert archive / Tennessee / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 178, NWS Memphis, TN

May 14, 2010Decatur County, Tennessee

NWS Memphis, TN issued this severe thunderstorm warning at May 14, 2010, 4:56 PM CDT for Decatur County, Tennessee. It was in force for 34 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 14, 2010, 4:56 PM CDT (21:56 UTC)
Expired
May 14, 2010, 5:30 PM CDT
In force
34 min
Issued by
NWS Memphis, TN
Area
Storm-based polygon

County Decatur County, TN

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
May 14, 1:00 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 9.9 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-pSkew-T log-p diagram, Nashville Metro, TN at 12:00Z on 2010-05-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2636 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Nashville Metro, TN at 12:00Z on 2010-05-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 53 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
2636 J/kg
Mixed-layer CIN
-23 J/kg
Mixed-layer LCL
831 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
53 m²/s²
0-3 km storm-relative helicity
85 m²/s²
Significant tornado parameter
1.1
Supercell composite
5.3

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 May 14, 3:51 PM CDT, 1 hour 5 minutes earlier.

Area forecast discussion, May 14, 3:51 PM CDT, 1 hour 5 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MEMPHIS TN
351 PM CDT FRI MAY 14 2010

.DISCUSSION...

A STATIONARY FRONT EXTENDS ACROSS OUR CWA JUST NORTHWEST OF
MEMPHIS AND JACKSON. THIS BOUNDARY HAS BEEN THE FOCUS AREA FOR
SHOWERS AND THUNDERSTORMS THIS AFTERNOON WITH A FEW STORMS
CONTAINING LARGE HAIL. EXPECT THE SEVERE STORM POTENTIAL TO
CONTINUE DURING THE MAX HEATING OF THE DAY ALONG THE BOUNDARY
WHERE INSTABILITY IS HIGH.

THUNDERSTORM POTENTIAL WILL REMAIN HIGH THROUGH THE WEEKEND AS A
SERIES OF SHORTWAVES MOVE THROUGH THE AREA. THE STATIONARY
BOUNDARY WILL EVENTUALLY MOVE NORTHWARD INTO MISSOURI AND KENTUCKY
ON SATURDAY. THE CHANCE OF THUNDERSTORMS WILL EVENTUALLY COME TO
AN END MONDAY NIGHT AS BOUNDARY MOVES THROUGH AS A COLD FRONT.

THE REST OF THE FORECAST PERIOD WILL BE A LITTLE COOLER AND DRIER
BUT A RETURN FLOW MAY WARRANT LOW CHANCES OF SHOWERS AND
THUNDERSTORMS IN LATER FORECASTS IF NEEDED.

SWC

&&

.AVIATION...

18Z TAFS
TSRA TO CONTINUE TO DEVELOP ALONG THE I40 CORRIDOR ALL AFTERNOON.
DEVELOPMENT LINE TO MOVE SOUTH AS AFTERNOON PROGRESSES.  WINDS OUT
OF SW UNTIL FROPA...THEN NORTHERLY WIND ARE ON THE DOCKET. LITTLE OR
NO IMPROVEMENT IN CIGS THIS AFTERNOON. SOME BR IN MKL/TUP LATE TNGT.

WER

&&

.PRELIMINARY POINT TEMPS/POPS...
MEM  69  83  67  83 /  50  50  40  60
MKL  65  81  64  81 /  40  50  40  60
JBR  63  79  64  81 /  50  50  40  60
TUP  69  85  67  85 /  30  40  30  60

&&

.MEG WATCHES/WARNINGS/ADVISORIES...
AR...NONE.
MO...NONE.
MS...NONE.
TN...NONE.
&&
Hazardous weather outlook, May 14, 4:05 AM CDT, 12 hours 51 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MEMPHIS TN
405 AM CDT FRI MAY 14 2010

ARZ008-009-017-018-026>028-035-036-048-049-058-MOZ113-115-
MSZ001>017-020>024-TNZ001>004-019>021-048>055-088>092-151115-
ALCORN-BENTON MS-CALHOUN-CARROLL-CHESTER-CHICKASAW-CLAY-COAHOMA-
CRAIGHEAD-CRITTENDEN-CROCKETT-CROSS-DESOTO-DECATUR-DUNKLIN-DYER-
FAYETTE-GIBSON-GREENE-HARDEMAN-HARDIN-HAYWOOD-HENDERSON-HENRY-
ITAWAMBA-LAFAYETTE-LAKE-LAUDERDALE-LAWRENCE-LEE AR-LEE MS-MADISON-
MARSHALL-MCNAIRY-MISSISSIPPI-MONROE-OBION-PANOLA-PEMISCOT-
PHILLIPS-POINSETT-PONTOTOC-PRENTISS-QUITMAN-RANDOLPH-SHELBY-
ST. FRANCIS-TALLAHATCHIE-TATE-TIPPAH-TIPTON-TISHOMINGO-TUNICA-
UNION-WEAKLEY-YALOBUSHA-
405 AM CDT FRI MAY 14 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EAST ARKANSAS...
THE MISSOURI BOOTHEEL...NORTH MISSISSIPPI...AND WEST TENNESSEE.

.DAY ONE...TODAY AND TONIGHT

THERE IS A SLIGHT RISK FOR SEVERE WEATHER NORTH OF A BOONEVILLE
MISSISSIPPI TO CLARKSDALE MISSISSIPPI LINE THIS AFTERNOON AND THIS
EVENING. A COLD FRONT WILL PUSH SOUTH INTO THE AREA TODAY AND
INTERACT WITH A MOIST AND INCREASINGLY UNSTABLE AIRMASS. SEVERE
THUNDERSTORMS WILL BE POSSIBLE WITH DAMAGING WINDS AND LARGE HAIL
AS THE MAIN THREAT. LOCALLY HEAVY RAINFALL IS ALSO POSSIBLE. THE
BEST TIME FOR SEVERE THUNDERSTORM DEVELOPMENT WILL BE BETWEEN
NOON AND 9 PM THOUGH SOME THREAT WILL CONTINUE OVERNIGHT.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

SCATTERED TO NUMEROUS THUNDERSTORMS WILL BE POSSIBLE SATURDAY
THROUGH MONDAY. SOME OF THESE STORMS COULD BECOME SEVERE AS A
SERIES OF UPPER LEVEL DISTURBANCES INTERACTS WITH A WARM...MOIST
AND UNSTABLE AIRMASS ACROSS THE MID SOUTH. DAMAGING WINDS AND
LARGE HAIL WILL BE THE MAIN THREATS WITH ANY STORMS THAT BECOME
SEVERE.

ONE TO TWO INCHES OF RAINFALL IS POSSIBLE THROUGH MONDAY WHICH COULD
RESULT IN SOME LOCALIZED FLOODING.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED AT TIMES FROM THIS AFTERNOON
THROUGH THIS WEEKEND.

SJM

In the hours before

Local storm report, May 14, 4:39 PM CDT, 17 minutes before
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Local storm report, May 14, 4:48 PM CDT, 8 minutes before
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Local storm report, May 14, 4:50 PM CDT, 6 minutes before
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Local storm report, May 14, 4:52 PM CDT, 4 minutes before
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Special weather statement, May 14, 4:52 PM CDT, 4 minutes before
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Local storm report, May 14, 4:54 PM CDT, 2 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
May 13, 8:15 PM CDTRiver Flood AdvisoryMEGShelby4 days
May 13, 8:43 PM CDTRiver Flood AdvisoryMEGHardin13 hr
May 14, 12:28 PM CDTFlash Flood WarningMEGDecatur8 hr
May 14, 12:28 PM CDTSevere Thunderstorm WarningMEGHenry47 min
May 14, 12:29 PM CDTSevere Thunderstorm WarningMEGHenry, Weakley31 min
May 14, 12:33 PM CDTSevere Thunderstorm WarningMEGLauderdale27 min
May 14, 12:53 PM CDTFlash Flood WarningMEGCarroll, Gibson, Henry, Weakley4 hr
May 14, 1:22 PM CDTSevere Thunderstorm WarningMEGCarroll, Henry, Weakley42 min
May 14, 2:08 PM CDTSevere Thunderstorm WarningMEGCarroll16 min
May 14, 2:10 PM CDTFlash Flood WarningMEGCarroll, Gibson, Henderson, Madison3 hr
May 14, 2:46 PM CDTFlash Flood WarningMEGChester, Decatur, Hardin, Henderson6 hr
May 14, 2:49 PM CDTSevere Thunderstorm WarningMEGDecatur26 min
May 14, 3:18 PM CDTSevere Thunderstorm WarningMEGDecatur25 min
May 14, 4:32 PM CDTSevere Thunderstorm WarningMEGDecatur28 min
May 14, 4:38 PM CDTFlash Flood WarningMEGTipton2 hr
May 14, 4:49 PM CDTSevere Thunderstorm WarningMEGShelby41 min
May 14, 4:55 PM CDTFlash Flood WarningMEGShelby3 hr
May 14, 5:23 PM CDTSevere Thunderstorm WarningMEGShelby52 min
May 14, 5:35 PM CDTSevere Thunderstorm WarningMEGChester, Henderson, McNairy, Madison34 min
May 14, 5:38 PM CDTSevere Thunderstorm WarningMEGChester, Fayette, Hardeman, Madison52 min
May 14, 5:46 PM CDTSevere Thunderstorm WarningMEGFayette, Shelby, Tipton44 min
May 14, 6:00 PM CDTFlash Flood WarningMEGChester, Hardeman, Haywood, McNairy, Madison3 hr
May 14, 6:18 PM CDTFlash Flood WarningMEGFayette, Hardeman, Haywood, Shelby, Tipton101 min
May 14, 6:20 PM CDTSevere Thunderstorm WarningMEGShelby40 min
May 14, 6:31 PM CDTSevere Thunderstorm WarningMEGFayette, Haywood, Tipton44 min
May 14, 5:25 PM CDTSevere Thunderstorm WarningMEGTunica35 min
May 14, 11:33 AM CDTSevere Thunderstorm WarningMEGCraighead, Mississippi, Poinsett42 min
May 14, 4:00 PM CDTSevere Thunderstorm WarningMEGCross, Lee, St. Francis30 min
May 14, 4:28 PM CDTSevere Thunderstorm WarningMEGCross, St. Francis47 min
May 14, 5:02 PM CDTSevere Thunderstorm WarningMEGCross, Poinsett14 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2010Every severe thunderstorm warning 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.