Alert archive / Tennessee / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 170, NWS Huntsville, AL

June 15, 2011Franklin County, Moore County, Tennessee

NWS Huntsville, AL issued this severe thunderstorm warning at Jun 15, 2011, 5:45 PM CDT for Franklin County, Moore County, Tennessee. It was in force for 30 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 15, 2011, 5:45 PM CDT (22:45 UTC)
Expired
Jun 15, 2011, 6:15 PM CDT
In force
30 min
Issued by
NWS Huntsville, AL
Area
Storm-based polygon

Counties Franklin County, TN, Moore County, TN

The radar

The Northeast Alabama radar (KHTX), 35 km from the middle of the area, began a volume at 22:47 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.

IssuedProductOfficeLasted
Jun 15, 11:52 AM CDTSevere Thunderstorm WatchSPC9 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 10.8 hours before the alert went out and 232 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, Birmingham, AL at 12:00Z on 2011-06-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1677 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, Birmingham, AL at 12:00Z on 2011-06-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 60 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
1677 J/kg
Mixed-layer CIN
-156 J/kg
Mixed-layer LCL
1517 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
60 m²/s²
0-3 km storm-relative helicity
88 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 Huntsville, AL wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 15, 1:36 PM CDT, 4 hours 9 minutes earlier.

Area forecast discussion, Jun 15, 1:36 PM CDT, 4 hours 9 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HUNTSVILLE AL
136 PM CDT WED JUN 15 2011

.DISCUSSION...
MONITORING MESOSCALE AND CONVECTIVE TRENDS FOR THE EVENING
FORECAST. CURRENTLY EXPECT SCATTERED THUNDERSTORMS TO BCM NMRS IN
VERY UNSTABLE ENVIRONMENT AS THE SHORTWAVE/VORTICITY AXIS SHIFTS EWD.
MULTIPLE BANDS OF CONVECTION APPEAR TO BE DEVELOPING ALONG
CONVERGENCE LINES ACROSS SRN MIDDLE TN INTO NRN AL. THE STRONGER
CONVERGENCE ZONE APPEARS TO BE SHOWING UP SW OF NASHVILLE INTO NERN
MS...WHILE ANOTHER RUNS FROM NEAR HUNTSVILLE TO JASPER IN AL. THE RUC
ATTEMPTS TO ORGANIZE A MORE LINEAR MCS BAND OVER THE NEXT FEW HRS
THAT PROPAGATES SEWD TOWARD THE I-20/59 CORRIDORS. THERE IS
ADDITIONAL CONVECTION N OF MEMPHIS...WHILE THE COLD FRONT SITS ACROSS
SERN MO INTO NRN AR. THIS FRONT WEAKENS WITH TIME TNGT...SO NOT
EXPECTING A "SWEEPING" CLEAN OF THE AIRMASS TNGT. SO WILL CARRY POPS
INTO THE OVERNIGHT HRS IN OUR SERN COUNTIES...AND THAT MAY NEED
FURTHER ADJUSTMENT. SOME PATCHY FG IS PSBL...BUT I HESITATE TO PLACE
IT INTO THE FCST UNTIL RAIN AREAS ARE BETTER DEFINED.

BETWEEN NOW AND SATURDAY ARE OUR BEST CHANCES...PERHAPS ONLY CHANCES
OF RAIN FOR THE NEXT 7 DAYS. ADDITIONAL WEAK SHORTWAVES DROP SEWD
THRU THE NW FLOW...WITH THE BEST SHOT ON FRIDAY AFTN. HOWEVER...I
HAVE CONCERNS THAT A CAP WL OVERSPREAD THE REGION THAT WILL RELEGATE
TSRA TO THE NE OF OUR FCST AREA. WL MAINTAIN SCHC POPS FOR NOW.

ANOTHER PROLONGED HEAT WAVE WL DEVELOP LATER THIS WEEKEND INTO NEXT
WEEK. TEMPS WL BEGIN TO WARM EACH DAY...AND WITH A BIT MORE MUGGINESS
THAN PREVIOUS DAYS. A STRONG 5H RIDGE BUILDS NE ACROSS THE TN VALLEY
SUNDAY INTO MONDAY. HAVE KEPT FCST TEMPS IN THE M-U90S IN WRN
PORTIONS OF OUR FORECAST AREA...AND U80S-L90S FURTHER E. RAIN CHANCES
MAY AGAIN INCREASE DAYS 8-9 AS THE RIDGE SHIFTS E AND BREAKS DOWN A
BIT. THE ECMWF ADVERTISES A TROF SIMILAR TO THE ONE WE HAVE ON OUR
HANDS CURRENTLY WITH A COLD FRONTAL PASSAGE ON THUR NIGHT OR FRIDAY.
&&

.PRELIMINARY POINT TEMPS/POPS...
HUNTSVILLE    70  95  72  94  72 /  50  10  10  20  10
SHOALS        69  95  71  96  73 /  40  10  10  20  10
VINEMONT      72  94  67  94  69 /  50  10  10  20  10
FAYETTEVILLE  69  93  69  93  70 /  50  10  10  20  10
ALBERTVILLE   69  93  65  92  68 /  60  10  10  20  10
FORT PAYNE    67  92  63  92  67 /  60  10  10  20  10

&&

.HUN WATCHES/WARNINGS/ADVISORIES...
AL...NONE.
TN...NONE.
&&

AK
Hazardous weather outlook, Jun 15, 2:00 PM CDT, 3 hours 45 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE HUNTSVILLE AL
200 PM CDT WED JUN 15 2011

ALZ001>010-016-TNZ076-096-097-160000-
LAUDERDALE-COLBERT-FRANKLIN AL-LAWRENCE-LIMESTONE-MADISON-MORGAN-
MARSHALL-JACKSON-DEKALB-CULLMAN-MOORE-LINCOLN-FRANKLIN TN-
200 PM CDT WED JUN 15 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH ALABAMA AND PORTIONS OF
SOUTHERN MIDDLE TENNESSEE.

.DAY ONE...TODAY AND TONIGHT...

SCATTERED SEVERE THUNDERSTORMS CAPABLE OF HAIL UP TO BASEBALL
SIZED...DAMAGING WINDS UP TO 70 MPH...AND FREQUENT LIGHTNING ARE
POSSIBLE THIS AFTERNOON INTO EARLY THIS EVENING. A WEAK COOL FRONT
WILL SHIFT THE THREAT OF THUNDERSTORMS SOUTHEAST OF THE AREA BY LATE
THIS EVENING OR OVERNIGHT.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY...

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

ISOLATED THUNDERSTORMS ARE POSSIBLE FRIDAY THROUGH TUESDAY ACROSS
MUCH OF THE OUTLOOK AREA. BRIEF HEAVY RAINFALL AND GUSTY WINDS ARE
POSSIBLE WITH THE STRONGER STORMS.

.SPOTTER CALL TO ACTION STATEMENT...

ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT PERSONNEL IS
UNDERWAY THIS AFTERNOON INTO EARLY EVENING.

KULA

In the hours before

Local storm report, Jun 15, 3:42 PM CDT, 2 hours 3 minutes before
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Local storm report, Jun 15, 4:30 PM CDT, 1 hour 15 minutes before
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Special weather statement, Jun 15, 4:56 PM CDT, 49 minutes before
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Special weather statement, Jun 15, 5:02 PM CDT, 43 minutes before
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Local storm report, Jun 15, 5:13 PM CDT, 32 minutes before
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Local storm report, Jun 15, 5:34 PM CDT, 11 minutes before
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The office that day

Everything else NWS Huntsville, AL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 15, 11:21 AM CDTSpecial Weather StatementHUNMadison24 min
Jun 15, 11:25 AM CDTSevere Thunderstorm WarningHUNJackson, Madison20 min
Jun 15, 11:43 AM CDTSevere Thunderstorm WarningHUNJackson, Madison32 min
Jun 15, 12:18 PM CDTSpecial Weather StatementHUNJackson42 min
Jun 15, 12:58 PM CDTSpecial Weather StatementHUNMadison32 min
Jun 15, 1:26 PM CDTSpecial Weather StatementHUNMadison34 min
Jun 15, 1:29 PM CDTSpecial Weather StatementHUNDeKalb31 min
Jun 15, 1:38 PM CDTSevere Thunderstorm WarningHUNJackson, Madison, Marshall30 min
Jun 15, 2:00 PM CDTSpecial Weather StatementHUNJackson45 min
Jun 15, 2:04 PM CDTSevere Thunderstorm WarningHUNJackson, Marshall26 min
Jun 15, 2:13 PM CDTSevere Thunderstorm WarningHUNDeKalb, Jackson47 min
Jun 15, 2:18 PM CDTSevere Thunderstorm WarningHUNDeKalb, Jackson, Marshall27 min
Jun 15, 2:35 PM CDTSevere Thunderstorm WarningHUNDeKalb, Jackson30 min
Jun 15, 2:38 PM CDTSevere Thunderstorm WarningHUNDeKalb, Jackson52 min
Jun 15, 4:56 PM CDTSpecial Weather StatementHUNLauderdale34 min
Jun 15, 6:10 PM CDTSevere Thunderstorm WarningHUNJackson36 min
Jun 15, 6:16 PM CDTSevere Thunderstorm WarningHUNJackson, Madison29 min
Jun 15, 6:52 PM CDTSpecial Weather StatementHUNLauderdale38 min
Jun 15, 6:59 PM CDTSevere Thunderstorm WarningHUNDeKalb, Jackson20 min
Jun 15, 10:09 AM CDTSpecial Weather StatementHUNMoore36 min
Jun 15, 10:51 AM CDTSpecial Weather StatementHUNFranklin24 min
Jun 15, 11:03 AM CDTSevere Thunderstorm WarningHUNFranklin15 min
Jun 15, 4:19 PM CDTSevere Thunderstorm WarningHUNFranklin11 min
Jun 15, 5:02 PM CDTSpecial Weather StatementHUNMoore43 min
Jun 15, 5:06 PM CDTSevere Thunderstorm WarningHUNFranklin, Lincoln, Moore39 min
Jun 15, 6:04 PM CDTSpecial Weather StatementHUNLincoln26 min
Jun 15, 6:16 PM CDTSpecial Weather StatementHUNFranklin29 min
Jun 15, 6:38 PM CDTSpecial Weather StatementHUNLincoln, Moore52 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2011Every severe thunderstorm warning in 2011

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.