Alert archive / Tennessee / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 270, NWS Memphis, TN

April 30, 2006Obion County, Weakley County, Tennessee

NWS Memphis, TN issued this severe thunderstorm warning at Apr 30, 2006, 9:47 PM CDT for Obion County, Weakley County, Tennessee. It was in force for 58 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: Apr 30, 2006, 9:47 PM CDT (02:47 UTC)
Expired: Apr 30, 2006, 10:45 PM CDT
In force: 58 min
Issued by: NWS Memphis, TN
Area: Counties, with a storm outline in the text

Counties Obion County, TN, Weakley County, TN

The radar

The Paducah radar (KPAH), 84 km from the middle of the area, began a volume at 02:51 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

Little Rock, AR (KLZK), launched 00:00Z, 2.8 hours before the alert went out and 190 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: 50 J/kg
Mixed-layer CIN: -49 J/kg
Mixed-layer LCL: 1980 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 89 m²/s²
0-3 km storm-relative helicity: 118 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 Memphis, TN wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 30, 9:01 PM CDT, 46 minutes earlier.

Area forecast discussion, Apr 30, 9:01 PM CDT, 46 minutes before

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE MEMPHIS TN
901 PM CDT SUN APR 30 2006

.DISCUSSION...00Z UPPER AIR ANALYSIS SHOWS SHORTWAVE BEGINNING TO
DEPART THE MID SOUTH AND ANOTHER ONE ACROSS SOUTHWEST MISSOURI AND
OKLAHOMA TO APPROACH. HOWEVER...WITH THE LOSS OF DAYTIME HEATING
THINK THAT CONVECTIVE POTENTIAL WILL CONTINUE TO DIMINISH AS THE
NIGHT PROGRESSES. AS A RESULT...TRIMMED BACK POPS TO THE NORTHERN
TIER OR TWO OF COUNTIES OVERNIGHT AND REMOVED THUNDER OVERNIGHT.

UPDATED GRIDS HAVE ALREADY BEEN PUBLISHED.

CJC

.PREV DISCUSSION...ISSUED 359 PM CDT SUN APR 30 2006

TONIGHT...QUASI-STATIONARY BOUNDARY BISECTING THE MID SOUTH JUST
EAST OF THE MISSISSIPPI RIVER AND AN UPPER LEVEL SHORTWAVE IS THE
FOCUS FOR CONVECTION ACROSS THE MID SOUTH THIS EVENING.
REGIONAL/KNQA WSR-88D RADAR SHOWS SURFACE BOUNDARY JUST BARELY EAST
OF THE RIVER LATE THIS AFTERNOON. LAPS ANALYSIS INDICATES BETWEEN
900- 1300 J/KG SURFACE BASED CAPE...LI/S AROUND -7 TO -8...AND STEEP
700-500 MB LAYER MID LEVEL LAPSE RATES...PRIMARILY WEST OF THE
MISSISSIPPI RIVER. CONSEQUENTLY CONVECTION HAS DEVELOPED ACROSS
MISSOURI AND ARKANSAS LATE THIS AFTERNOON. THINK THAT CONVECTION
WILL LAST THROUGH MID EVENING...AND GRADUALLY BEGINNING TO TAPER OFF
WITH THE LOSS OF DAYTIME HEATING. FREEZING LEVELS BELOW 10KFT AND A
SOMEWHAT FAVORABLE WIND PROFILE ALOFT WILL SUPPORT A HAIL AND WIND
THREAT WITH ANY SEVERE THUNDERSTORMS. NEAR THE SURFACE BOUNDARY
ACROSS NORTHEAST ARKANSAS...MISSOURI BOOTHEEL...AND EXTREME
NORTHWEST TENNESSEE...35KTS 0-6KM BULK SHEAR AND SOMEWHAT FAVORABLE
EQUILIBRIUM LEVELS/LCLS MIGHT SUPPORT A BRIEF BUT ISOLATED TORNADO
IN THE CONVECTION.

MONDAY AND TUESDAY...NOT MUCH CHANGE EXPECTED IN THE SYNOPTIC
PATTERN ACROSS THE MID SOUTH FOR MONDAY AND TUESDAY AS INDIVIDUAL
SHORTWAVES PINWHEEL AROUND THE UPPER LEVEL LOW. MAIN FOCUS FOR
INSTABILITY DURING THIS TIME FRAME WILL BE DAYTIME HEATING WITH
SURFACE BASED CAPES APPROACHING 2000 J/KG...MODERATE TO STEEP 700-
500 MB LAYER MID LEVEL LAPSE RATES BETWEEN 6.5 TO 7.0 C/KM...AND
LI/S AROUND -7. SHORT TERM MODELS SUGGEST THAT THE PRIMARY SEVERE
WEATHER THREATS AT THIS TIME WILL BE LARGE HAIL/DAMAGING WINDS.
CURRENT THINKING MATCHES UP WELL WITH SPC DAY2/DAY3 OUTLOOK.

LONG TERM...(WEDNESDAY THROUGH SATURDAY)...LONG RANGE MODELS FEATURE
NEARLY ZONAL FLOW ACROSS THE LOWER MISSISSIPPI VALLEY AT THE
BEGINNING OF THE PERIOD. AN UPPER LEVEL LOW WILL MOVE ACROSS CANADA
EVENTUALLY ROTATING AROUND HUDSON BAY...AND DROPPING A COLD FRONT
ACROSS THE LOWER MISSISSIPPI VALLEY BY THURSDAY AND FRIDAY.
ASSOCIATED UPPER LEVEL TROUGH WILL SLIDE THROUGH AND DEPART THE
MID SOUTH ON SATURDAY.

&&
.MEG WATCHES/WARNINGS/ADVISORIES...
AR...NONE.
MO...NONE.
MS...NONE.
TN...NONE.
&&

CJC

Hazardous weather outlook, Apr 30, 9:05 PM CDT, 42 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE MEMPHIS TN
905 PM CDT SUN APR 30 2006

ARZ008-009-017-018-026>028-035-036-048-049-058-MOZ113-115-
MSZ001>017-020>024-TNZ001>004-019>021-048>055-088>092-011115-
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-
905 PM CDT SUN APR 30 2006

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

.DAY ONE...TONIGHT

THERE IS A SLIGHT RISK OF SEVERE WEATHER ACROSS A PORTION OF EXTREME
NORTHWEST TENNESSEE THIS EVENING PRIMARILY NORTH OF A LINE FROM
DYERSBURG TO VALE. THE PRIMARY SEVERE WEATHER THREATS ARE DAMAGING
WINDS AND LARGE HAIL. OTHERWISE...THE PROBABILITY OF WIDESPREAD
HAZARDOUS WEATHER IS LOW.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

THERE WILL BE A SLIGHT RISK OF SEVERE WEATHER ACROSS THE ENTIRE
MID-SOUTH AREA MONDAY AND TUESDAY...MAINLY DURING THE AFTERNOON AND
EARLY EVENING HOURS. LITTLE CHANGE IN THE WEATHER PATTERN IS
ANTICIPATED THROUGH TUESDAY. AS WEAK WEATHER SYSTEMS MOVE ACROSS
THE AREA...DEVELOPMENT OF ISOLATED TO SCATTERED THUNDERSTORMS IS
POSSIBLE. SOME OF THESE STORMS MAY BE CAPABLE OF PRODUCING LARGE
HAIL AND DAMAGING WINDS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NECESSARY THIS EVENING AND AGAIN ON MONDAY
AND TUESDAY.

In the hours before

Special weather statement, Apr 30, 5:11 PM CDT, 4 hours 36 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MEMPHIS TN
511 PM CDT SUN APR 30 2006

ARZ009-302300-
CLAY AR-
511 PM CDT SUN APR 30 2006

THIS SIGNIFICANT WEATHER ADVISORY IS FOR...CLAY COUNTY.

A STRONG THUNDERSTORM CAPABLE OF PRODUCING PEA TO DIME SIZE HAIL WAS
LOCATED 3 MILES WEST OF SUCCESS AT 511 PM CDT...MOVING EAST AT 20
MPH.

THIS STORM IS INTENSIFYING AND COULD BECOME SEVERE RAPIDLY.

PEOPLE IN CLAY COUNTY...INCLUDING THE CITY OF CORNING...SHOULD
MONITOR THIS STORM CLOSELY.

Special weather statement, Apr 30, 6:02 PM CDT, 3 hours 45 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MEMPHIS TN
602 PM CDT SUN APR 30 2006

ARZ009-MOZ113-302330-
CLAY AR-DUNKLIN MO-
602 PM CDT SUN APR 30 2006

THIS SIGNIFICANT WEATHER ADVISORY IS FOR...CLAY AND DUNKLIN COUNTIES.

A STRONG THUNDERSTORM CAPABLE OF PRODUCING PEA TO DIME SIZE HAIL WAS
LOCATED 5 MILES NORTHWEST OF ST. FRANCIS AT 602 PM CDT...MOVING
NORTHEAST AT 25 MPH.

PEOPLE IN CLAY AND DUNKLIN COUNTIES...INCLUDING THE CITIES OF
CAMPBELL AND MALDEN...SHOULD MONITOR THIS STORM CLOSELY.

Local storm report, Apr 30, 6:49 PM CDT, 2 hours 58 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MEMPHIS TN
649 PM CDT SUN APR 30 2006

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

0630 PM     FUNNEL CLOUD     CLARKTON                36.45N 89.97W
04/30/2006                   DUNKLIN            MO   TRAINED SPOTTER

0632 PM     HAIL             1 NW CLARKTON           36.46N 89.98W
04/30/2006  M1.00 INCH       DUNKLIN            MO   TRAINED SPOTTER

0635 PM     HAIL             CAMPBELL                36.49N 90.07W
04/30/2006  M0.88 INCH       DUNKLIN            MO   AMATEUR RADIO

0645 PM     HAIL             4 E CAMPBELL            36.49N 90.00W
04/30/2006  M1.75 INCH       DUNKLIN            MO   LAW ENFORCEMENT

            REPORTED BY LAW ENFORCEMENT 4 MILES EAST OF CAMPBELL ON
            HWY 62.

0645 PM     FUNNEL CLOUD     4 E CAMPBELL            36.49N 90.00W
04/30/2006                   DUNKLIN            MO   LAW ENFORCEMENT

&&

CJC

Local storm report, Apr 30, 7:34 PM CDT, 2 hours 13 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE MEMPHIS TN
734 PM CDT SUN APR 30 2006

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

0630 PM     FUNNEL CLOUD     CLARKTON                36.45N 89.97W
04/30/2006                   DUNKLIN            MO   TRAINED SPOTTER

0632 PM     HAIL             1 NW CLARKTON           36.46N 89.98W
04/30/2006  M1.00 INCH       DUNKLIN            MO   TRAINED SPOTTER

0635 PM     HAIL             CAMPBELL                36.49N 90.07W
04/30/2006  M0.88 INCH       DUNKLIN            MO   AMATEUR RADIO

0645 PM     FUNNEL CLOUD     4 E CAMPBELL            36.49N 90.00W
04/30/2006                   DUNKLIN            MO   LAW ENFORCEMENT

0645 PM     HAIL             4 E CAMPBELL            36.49N 90.00W
04/30/2006  M1.75 INCH       DUNKLIN            MO   LAW ENFORCEMENT

            REPORTED BY LAW ENFORCEMENT 4 MILES EAST OF CAMPBELL ON
            HWY 62.

0720 PM     HAIL             S MALDEN                36.58N 89.98W
04/30/2006  E0.88 INCH       DUNKLIN            MO   AMATEUR RADIO

            PEA TO NICKEL SIZE HAIL COVERING THE GROUND

0725 PM     HAIL             N CLARKTON              36.45N 89.97W
04/30/2006  E0.88 INCH       DUNKLIN            MO   AMATEUR RADIO

&&

CJC

Special weather statement, Apr 30, 7:53 PM CDT, 1 hour 54 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MEMPHIS TN
753 PM CDT SUN APR 30 2006

TNZ001-002-010200-
LAKE TN-OBION TN-
753 PM CDT SUN APR 30 2006

THIS SIGNIFICANT WEATHER ADVISORY IS FOR...LAKE AND OBION COUNTIES.

A STRONG THUNDERSTORM CAPABLE OF PRODUCING A TORNADO AND UP TO
GOLFBALL SIZE HAIL WAS LOCATED 22 MILES WEST OF CLAYTON AT 753 PM
CDT...MOVING EAST AT 50 MPH.

THIS STORM COULD BECOME SEVERE RAPIDLY.

PEOPLE IN LAKE AND OBION COUNTIES...INCLUDING THE CITY OF UNION
CITY...SHOULD MONITOR THIS STORM CLOSELY.

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 30, 8:18 PM CDT	Severe Thunderstorm Warning	MEG	Obion	42 min
Apr 30, 9:06 PM CDT	Tornado Warning	MEG	Lake	24 min
Apr 30, 10:34 PM CDT	Severe Thunderstorm Warning	MEG	Henry	41 min
Apr 30, 10:45 PM CDT	Severe Thunderstorm Warning	MEG	Weakley	45 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2006 Every severe thunderstorm warning in 2006

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.