Alert archive / Tennessee / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 123, NWS Memphis, TN

June 29, 2007Henry County, Tennessee

NWS Memphis, TN issued this severe thunderstorm warning at Jun 29, 2007, 1:09 PM CDT for Henry County, Tennessee. It was in force for 33 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 29, 2007, 1:09 PM CDT (18:09 UTC)
Expired
Jun 29, 2007, 1:42 PM CDT
In force
33 min
Issued by
NWS Memphis, TN
Area
Counties, with a storm outline in the text

County Henry County, TN

The radar

The Paducah radar (KPAH), 92 km from the middle of the area, began a volume at 18:10 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, 6.2 hours before the alert went out and 154 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 2007-06-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 573 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 2007-06-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 45 square meters per square second.1939Sfc1 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
573 J/kg
Mixed-layer CIN
-81 J/kg
Mixed-layer LCL
1078 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
45 m²/s²
0-3 km storm-relative helicity
61 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 Jun 29, 10:23 AM CDT, 2 hours 46 minutes earlier.

Area forecast discussion, Jun 29, 10:23 AM CDT, 2 hours 46 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MEMPHIS TN
1023 AM CDT FRI JUN 29 2007

.UPDATE...

ANOTHER WARM DAY ON TAP FOR THE MIDSOUTH TODAY. TEMPERATURES ARE
CURRENTLY RUNNING AT LEAST 2 TO 3 DEGREES WARMER IF NOT MORE THAN
THIS TIME YESTERDAY. THE TEMPERATURE HAS ALREADY HIT THE 90 DEGREE
MARK IN MEMPHIS AND TUPELO WITH OTHER LOCATIONS SITTING IN THE MID
TO UPPER 80S. CU DEVELOPMENT HAS BEGUN AND WITH A COLD FRONT
SINKING INTO NORTHERN PORTIONS OF THE CWA THIS AFTERNOON...EXPECT
IT WILL ONLY BE A MATTER OF TIME BEFORE SCATTERED SHOWERS AND
THUNDERSTORMS BEGIN TO POP. SINCE TEMPERATURES ARE WARMER THAN
PREVIOUS DAYS WILL BUMP UP HIGHS SLIGHTLY AS CLOUDS FROM SHOWER
AND THUNDERSTORM DEVELOPMENT WILL BEGIN TO HINDER CONTINUE WARM-UP AS
THE AFTERNOON PROGRESSES. EXPECT HIGHS TO REACH WELL INTO THE MID
90S MAYBE A FEW PLACES MAY REACH THE UPPER 90S. REST OF FORECAST
LOOKS GOOD. UPDATE WILL BE OUT SHORTLY.

&&

.PREV DISCUSSION... /ISSUED 342 AM CDT FRI JUN 29 2007/

DISCUSSION...

CURRENTLY...SKIES ARE MOSTLY CLEAR ACROSS THE MID SOUTH THIS
MORNING WITH TEMPS IN THE LOWER AND MID 70S. HUMID CONDITIONS
CONTINUE WITH DEWPOINTS AROUND 70. MOST OF THE SHOWER/TSTM ACTIVITY
THIS MORNING IS OCCURRING INVOF A SLOW MOVING COLD FRONT LOCATED
ACROSS SOUTHERN MISSOURI INTO THE OHIO VALLEY.

TODAY...LOWERED POPS SLIGHTLY ACROSS THE FORECAST AREA AS UPPER
RIDGE CONTINUES TO HOLD ON ACROSS THE LOWER MISSISSIPPI VALLEY.
THE MOIST AND MODERATELY UNSTABLE ACROSS THE REGION WILL CONTINUE
WITH SCATTERED TSTMS DEVELOPING THIS AFTERNOON AS TEMPS CLIMB INTO
THE 90S. LIKE PREVIOUS AFTERNOONS SOME STORMS COULD HAVE GUSTY
WINDS AND SMALL HAIL ALONG WITH VERY HEAVY RAIN. THE COLD FRONT
WILL SLOWLY SAG SOUTHWARD THROUGH THE DAY TO AROUND THE KY/TN
STATE LINE SO WENT WITH HIGHER POPS ACROSS NORTHERN SECTIONS OF
THE FORECAST AREA.

TONIGHT...ANOTHER WARM AND MUGGY NIGHT ON TAP. WILL CONTINUE POPS
OVERNIGHT DUE TO THE PRESENCE OF THE WEAK SURFACE FRONT ACROSS
THE VERY NORTHERN SECTIONS OF THE AREA...THOUGH MOST OF THE
ACTIVITY WILL PROBABLY OCCUR DURING THE EVENING BEFORE DISSIPATING.

SATURDAY...THE UPPER RIDGE WEAKENS SLIGHTLY AS A MID LEVEL
SHORTWAVE SAGS SOUTHWARD INTO THE MID SOUTH ALONG WITH THE WEAK
COLD FRONT. SATURDAY PROBABLY REPRESENTS THE BEST CHANCE FOR RAIN
ACROSS THE MID SOUTH. MOISTURE POOLING ACROSS THE AREA INVOF THE
FRONT WILL PUSH PRECIP H20 VALUES TO OVER 2 INCHES. THIS DEEP
MOISTURE COMBINED WITH A LITTLE MORE INSTABILITY SHOULD RESULT IN
A GOOD DEAL OF TSTM DEVELOPMENT. EXPECT 40-50 MPH WINDS...SMALL
HAIL AND VERY HEAVY RAIN WITH ANY STORMS.

SATURDAY NIGHT THROUGH SUNDAY NIGHT...THE WEAK COLD FRONT AND MID
LEVEL SHORTWAVE WILL SLOWLY PUSH THROUGH REGION DURING THIS TIME
FRAME WITH SLOWLY DECREASING CHANCES FOR PRECIP. CLEARING IS
EXPECTED ACROSS MOST AREAS BY MONDAY MORNING.

MONDAY THROUGH THURSDAY...A DRIER AIRMASS WITH LOWER HUMIDITIES WILL
PUSH INTO THE MID SOUTH FOR THE START OF THE WORK WEEK. BY
WEDNESDAY HIGH PRESSURE WILL SLIP OFF TO THE EAST RESULTING IN A
RETURN TO MORE HUMID CONDITIONS. BY THURSDAY ANOTHER FRONT
APPROACHES THE AREA WITH A CHANCE FOR RAIN.

&&

&&

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

KRM

In the hours before

Special weather statement, Jun 29, 12:20 PM CDT, 49 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MEMPHIS TN
1220 PM CDT FRI JUN 29 2007

ARZ035-048-291800-
CROSS AR-ST. FRANCIS AR-
1220 PM CDT FRI JUN 29 2007

THIS SIGNIFICANT WEATHER ALERT IS FOR...SOUTHWESTERN CROSS AND
WESTERN ST. FRANCIS COUNTIES.

A STRONG THUNDERSTORM PRODUCING PEA TO DIME SIZE HAIL AND 40 TO 50
MPH WINDS WAS LOCATED 11 MILES WEST OF CALDWELL AT 1220 PM CDT...
MOVING NORTHEAST AT 10 MPH.

PEOPLE IN CROSS AND ST. FRANCIS COUNTIES...INCLUDING THE CITY OF
WYNNE...SHOULD MONITOR THIS STORM CLOSELY. THIS SIGNIFICANT WEATHER
ALERT IS IN EFFECT UNTIL 100 PM CDT.
Special weather statement, Jun 29, 12:34 PM CDT, 35 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MEMPHIS TN
1234 PM CDT FRI JUN 29 2007

ARZ008-291815-
RANDOLPH AR-
1234 PM CDT FRI JUN 29 2007

THIS SIGNIFICANT WEATHER ALERT IS FOR...RANDOLPH COUNTY.

STRONG THUNDERSTORMS PRODUCING PEA TO DIME SIZE HAIL AND 45 TO 55
MPH WINDS WERE LOCATED 5 MILES SOUTHWEST OF ATTICA AT 1234 PM CDT...
MOVING NORTHEAST AT 5 MPH.

PEOPLE IN RANDOLPH COUNTY...INCLUDING THE CITY OF POCAHONTAS...SHOULD
MONITOR THIS STORM CLOSELY..
Local storm report, Jun 29, 12:41 PM CDT, 28 minutes before
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Special weather statement, Jun 29, 12:44 PM CDT, 25 minutes before
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Special weather statement, Jun 29, 12:45 PM CDT, 24 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MEMPHIS TN
1245 PM CDT FRI JUN 29 2007

ARZ017-291845-
LAWRENCE AR-
1245 PM CDT FRI JUN 29 2007

THIS SIGNIFICANT WEATHER ALERT IS FOR...LAWRENCE COUNTY.

A LINE OF STRONG THUNDERSTORMS PRODUCING PEA TO DIME SIZE HAIL AND
45 TO 55 MPH WINDS WERE ENTERING WESTERN LAWRENCE COUNTY AT 1245 PM.
THESE THUNDERSTORMS WERE MOVING NORTHEAST AT 15 MPH.

PEOPLE IN LAWRENCE COUNTY...INCLUDING THE CITY OF BLACK ROCK...SHOULD
MONITOR THIS STORM CLOSELY. THIS SIGNIFICANT WEATHER ALERT IS IN
EFFECT UNTIL 145 PM CDT.
Special weather statement, Jun 29, 12:58 PM CDT, 11 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MEMPHIS TN
1258 PM CDT FRI JUN 29 2007

ARZ035-048-291845-
CROSS AR-ST. FRANCIS AR-
1258 PM CDT FRI JUN 29 2007

THIS SIGNIFICANT WEATHER ALERT IS FOR...CROSS AND ST. FRANCIS
COUNTIES.

THUNDERSTORMS PRODUCING PEA TO DIME SIZE HAIL AND 40 TO 50 MPH WINDS
WERE LOCATED OVER COLT AT 1258 PM CDT...MOVING EAST AT 20 MPH.

PEOPLE IN CROSS AND ST. FRANCIS COUNTIES...INCLUDING THE CITIES OF
FORREST CITY...MADISON AND WYNNE...SHOULD MONITOR THESE STORMS
CLOSELY. THIS SIGNIFICANT WEATHER ALERT IS IN EFFECT UNTIL 145 PM
CDT.

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 29, 4:54 PM CDTSevere Thunderstorm WarningMEGCrockett, Gibson17 min
Jun 29, 2:44 PM CDTSevere Thunderstorm WarningMEGCraighead31 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2007Every severe thunderstorm warning in 2007

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.