Alert archive / Tennessee / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 341, NWS Memphis, TN

May 20, 2006Carroll County, Gibson County, Weakley County, Tennessee

NWS Memphis, TN issued this severe thunderstorm warning at May 20, 2006, 8:56 PM CDT for Carroll County, Gibson County, Weakley County, Tennessee. It was in force for 49 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 20, 2006, 8:56 PM CDT (01:56 UTC)
Expired: May 20, 2006, 9:45 PM CDT
In force: 49 min
Issued by: NWS Memphis, TN
Area: Counties, with a storm outline in the text

Counties Carroll County, TN, Gibson County, TN, Weakley County, TN

The radar

The Paducah radar (KPAH), 109 km from the middle of the area, began a volume at 01:55 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 20, 6:59 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Little Rock, AR (KLZK), launched 00:00Z, 1.9 hours before the alert went out and 180 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: 1731 J/kg
Mixed-layer CIN: -155 J/kg
Mixed-layer LCL: 1840 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 87 m²/s²
0-3 km storm-relative helicity: 68 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 20, 2:49 PM CDT, 6 hours 7 minutes earlier.

Area forecast discussion, May 20, 2:49 PM CDT, 6 hours 7 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MEMPHIS TN
249 PM CDT SAT MAY 20 2006

.DISCUSSION...

RAIN SHOWERS ARE BEGINNING TO MOVE BACK INTO THE FORECAST AREA
THIS AFTERNOON FROM THE NORTH. FRONTAL BOUNDARY HAS SHIFTED A
LITTLE TO THE SOUTH. FOR MOST LOCATIONS THE FRONT APPEARS NOT TO
BE A FACTOR AS TEMPERATURES ARE IN THE MID 80S TO LOWER 90S WITH
COOLER READING ACROSS EXTREME NORTHERN SECTIONS OF THE FORECAST
AREA. SCATTERED SHOWERS SHOULD MOVE INTO MAINLY NORTHERN AND
EASTERN SECTIONS OF THE FORECAST AREA TONIGHT. THUNDERSTORM
DEVELOPMENT HAS BEEN SLOW TO OCCUR DUE TO CAPPING ALOFT BUT THE
CAP SHOULD SLOWLY ERODE TONIGHT LEAVING A POSSIBILITY OF
THUNDERSTORMS. WITH A WARM AND HUMID ENVIRONMENT AS WELL CANT
RULE OUT AN ISOLATED SEVERE THUNDERSTORM AS WELL.

FRONTAL BOUNDARY IS NOT EXPECTED TOO MOVE MUCH ON SUNDAY SO WILL
SEE ANOTHER DAY WITH A THREAT OF SHOWERS AND THUNDERSTORMS. SPC
HAS MOST OF THE NORTHERN HALF OF THE FORECAST AREA IN A SLIGHT
RISK FOR SUNDAY AND AN ISOLATED SEVERE THUNDERSTORM IS POSSIBLE.
RAIN THREAT WILL CONTINUE INTO SUNDAY NIGHT AND MONDAY AS FRONTAL
BOUNDARY STILL CLOSE TO THE REGION.

BY MONDAY NIGHT...UPPER LEVEL RIDGE BEGIN TO DEVELOP OVER THE
CENTRAL PLAINS WHICH SHOULD HELP MOVE FRONT AWAY FROM THE REGION
AND KEEP THINGS DRY FOR A COUPLE OF DAYS. IT APPEARS THAT THE
RIDGE MAY BE SHORT LIVED AS AN UPPER LEVEL LOW WILL CLIMB OVER THE
RIDGE AND BRING UNSETTLED WEATHER BACK IN THE REGION BEGINNING
LATE WEDNESDAY NIGHT AND CONTINUING THROUGH FRIDAY.

&&

.PRELIMINARY POINT TEMPS/POPS...
MEM  69  88  68  85 /  30  20  20  20
MKL  66  85  62  81 /  40  40  30  20
JBR  67  88  64  83 /  40  30  30  20
TUP  66  88  65  86 /  20  20  10  20

&&

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

Hazardous weather outlook, May 20, 8:00 PM CDT, 56 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MEMPHIS TN
800 PM CDT SAT MAY 20 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>092-211200-
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-
800 PM CDT SAT MAY 20 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 THUNDERSTORMS FOR THE NORTHERN
HALF OF THE MIDSOUTH. THE SLIGHT RISK AREA IS ROUGHLY ALONG AND
NORTH OF A LINE FROM IUKA MISSISSIPPI...TO HOLLY SPRINGS
MISSISSIPPI...TO FORREST CITY ARKANSAS. AN UPPER LEVEL DISTURBANCE
AND ASSOCIATED FRONTAL BOUNDARY AND WILL SERVE AS A FOCUS FOR THE
DEVELOPMENT OF THUNDERSTORMS. THE MAIN THREAT FROM THESE STORMS WILL
BE LARGE HAIL AND DAMAGING WINDS.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS SUNDAY FOR ALL OF
THE MIDSOUTH. A STALLED FRONTAL BOUNDARY AND UPPER LEVEL DISTURBANCES
WILL PRODUCE A CHANCE OF SEVERE STORMS. THE THREAT FROM STORMS
THAT DEVELOP WILL BE LARGE HAIL AND DAMAGING WINDS.

.SPOTTER INFORMATION STATEMENT...

SKYWARN SPOTTER ACTIVATION MAY BE NEEDED THIS EVENING AND AGAIN ON
SUNDAY.

In the hours before

Local storm report, May 20, 6:46 PM CDT, 2 hours 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MEMPHIS TN
646 PM CDT SAT MAY 20 2006

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

0643 PM     HAIL             LEXINGTON               35.65N 88.39W
05/20/2006  E0.88 INCH       HENDERSON          TN   AMATEUR RADIO

0644 PM     HAIL             LEXINGTON               35.65N 88.39W
05/20/2006  E1.75 INCH       HENDERSON          TN   PUBLIC

            GOLF BALL SIZE HAIL REPORTED

&&

JFB

Local storm report, May 20, 7:12 PM CDT, 1 hour 44 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE MEMPHIS TN
712 PM CDT SAT MAY 20 2006

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

0643 PM     HAIL             LEXINGTON               35.65N 88.39W
05/20/2006  E0.88 INCH       HENDERSON          TN   AMATEUR RADIO

0644 PM     HAIL             LEXINGTON               35.65N 88.39W
05/20/2006  E1.75 INCH       HENDERSON          TN   PUBLIC

            GOLF BALL SIZE HAIL REPORTED

0708 PM     HAIL             SCOTTS HILL             35.52N 88.25W
05/20/2006  E0.75 INCH       HENDERSON          TN   EMERGENCY MNGR

&&

JFB

Local storm report, May 20, 7:14 PM CDT, 1 hour 42 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE MEMPHIS TN
714 PM CDT SAT MAY 20 2006

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

0643 PM     HAIL             LEXINGTON               35.65N 88.39W
05/20/2006  E0.88 INCH       HENDERSON          TN   AMATEUR RADIO

0644 PM     HAIL             LEXINGTON               35.65N 88.39W
05/20/2006  E1.75 INCH       HENDERSON          TN   PUBLIC

            GOLF BALL SIZE HAIL REPORTED

0708 PM     HAIL             SCOTTS HILL             35.52N 88.25W
05/20/2006  E0.75 INCH       HENDERSON          TN   EMERGENCY MNGR

0713 PM     HAIL             REAGAN                  35.52N 88.35W
05/20/2006  M0.88 INCH       HENDERSON          TN   EMERGENCY MNGR

&&

JFB

Local storm report, May 20, 7:54 PM CDT, 1 hour 2 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE MEMPHIS TN
754 PM CDT SAT MAY 20 2006

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

0643 PM     HAIL             LEXINGTON               35.65N 88.39W
05/20/2006  E0.88 INCH       HENDERSON          TN   AMATEUR RADIO

0644 PM     HAIL             LEXINGTON               35.65N 88.39W
05/20/2006  E1.75 INCH       HENDERSON          TN   PUBLIC

            GOLF BALL SIZE HAIL REPORTED

0708 PM     HAIL             SCOTTS HILL             35.52N 88.25W
05/20/2006  E0.75 INCH       HENDERSON          TN   EMERGENCY MNGR

0713 PM     HAIL             REAGAN                  35.52N 88.35W
05/20/2006  M0.88 INCH       HENDERSON          TN   EMERGENCY MNGR

0752 PM     HAIL             REAGAN                  35.52N 88.35W
05/20/2006  M0.88 INCH       HENDERSON          TN   EMERGENCY MNGR

            PENNY TO NICKEL SIZE HAIL REPORTED AT REAGAN FIRE
            DEPARTMENT

&&

JFB

The office that day

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

Issued	Product	Office	Counties	Lasted
May 20, 7:16 PM CDT	Severe Thunderstorm Warning	MEG	Decatur, Henderson	29 min
May 20, 7:43 PM CDT	Severe Thunderstorm Warning	MEG	Decatur, Henderson	47 min
May 20, 7:46 PM CDT	Flash Flood Warning	MEG	Decatur, Henderson	119 min
May 20, 9:35 PM CDT	Severe Thunderstorm Warning	MEG	Lake	25 min
May 20, 9:40 PM CDT	Severe Thunderstorm Warning	MEG	Carroll, Henderson	50 min
May 20, 9:53 PM CDT	Severe Thunderstorm Warning	MEG	Obion	37 min
May 20, 10:05 PM CDT	Severe Thunderstorm Warning	MEG	Decatur	40 min
May 20, 10:27 PM CDT	Severe Thunderstorm Warning	MEG	Weakley	33 min
May 21, 12:31 AM CDT	Severe Thunderstorm Warning	MEG	Lake, Obion	29 min
May 21, 3:45 PM CDT	Severe Thunderstorm Warning	MEG	Decatur, Henderson	45 min
May 21, 5:31 PM CDT	Severe Thunderstorm Warning	MEG	Lauderdale	44 min
May 21, 5:36 PM CDT	Severe Thunderstorm Warning	MEG	Madison	39 min
May 21, 5:59 PM CDT	Severe Thunderstorm Warning	MEG	Chester, Henderson	31 min
May 21, 6:11 PM CDT	Severe Thunderstorm Warning	MEG	Madison	41 min
May 21, 6:18 PM CDT	Flash Flood Warning	MEG	Decatur, Henderson	3 hr
May 21, 6:29 PM CDT	Severe Thunderstorm Warning	MEG	Henderson	46 min
May 21, 6:38 PM CDT	Severe Thunderstorm Warning	MEG	Chester	42 min
May 21, 6:44 PM CDT	Flash Flood Warning	MEG	Madison	2 hr
May 20, 8:51 PM CDT	Severe Thunderstorm Warning	MEG	Clay	39 min
May 20, 9:26 PM CDT	Severe Thunderstorm Warning	MEG	Clay	29 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.