Alert archive / Tennessee / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 122, NWS Huntsville, AL

July 5, 2017Franklin County, Lincoln County, Moore County, Tennessee

NWS Huntsville, AL issued this severe thunderstorm warning at Jul 5, 2017, 2:18 PM CDT for Franklin County, Lincoln County, Moore County, Tennessee. It was in force for 42 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
Jul 5, 2017, 2:18 PM CDT (19:18 UTC)
Expired
Jul 5, 2017, 3:00 PM CDT
In force
42 min
Issued by
NWS Huntsville, AL
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Franklin County, TN, Lincoln County, TN, Moore County, TN

The radar

The Northeast Alabama radar (KHTX), 38 km from the middle of the area, began a volume at 19:22 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, 7.3 hours before the alert went out and 107 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 2017-07-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 946 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 2017-07-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 69 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
946 J/kg
Mixed-layer CIN
-28 J/kg
Mixed-layer LCL
792 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
69 m²/s²
0-3 km storm-relative helicity
86 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 Jul 5, 2:08 PM CDT, 10 minutes earlier.

Area forecast discussion, Jul 5, 2:08 PM CDT, 10 minutes before
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Hazardous weather outlook, Jul 5, 1:51 PM CDT, 27 minutes before
Hazardous Weather Outlook
National Weather Service Huntsville AL
151 PM CDT Wed Jul 5 2017

ALZ001>010-016-TNZ076-096-097-061000-
Lauderdale-Colbert-Franklin AL-Lawrence-Limestone-Madison-Morgan-
Marshall-Jackson-De Kalb-Cullman-Moore-Lincoln-Franklin TN-
151 PM CDT Wed Jul 5 2017

This Hazardous Weather Outlook is for north Alabama and portions of
southern middle Tennessee.

.DAY ONE...Tonight...

Scattered thunderstorms will continue across the area through the
evening hours. A few strong to marginally severe storms are likely
with the primary threats being wind gusts to around 50 to 60 mph and
frequent cloud to ground lightning. Given the recent rainfall across
the area, a few instances of flash flooding are possible. Some
storms may linger into the overnight hours.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday...

Scattered to numerous showers and thunderstorms are expected again
on Thursday ahead of a weak front. A few stronger storms may produce
gusty winds to around 50 mph and heavy rainfall leading to isolated
instances of flash flooding.

Isolated to scattered thunderstorms will continue on Friday, as the
front washes out to our south. A slightly stronger front will move
into the region on Saturday, with scattered thunderstorms possible
once again. A few storms may become strong, with gusty winds and
heavy rainfall the main threats.

Isolated thunderstorms will remain in the forecast Sunday through
Tuesday.

.SPOTTER CALL TO ACTION STATEMENT...

Activation of storm spotters and emergency management personnel is
not anticipated at this time.

In the hours before

Special weather statement, Jul 5, 1:34 PM CDT, 44 minutes before
Special Weather Statement
National Weather Service Huntsville AL
134 PM CDT WED JUL 5 2017

ALZ009-010-051915-
De Kalb AL-Jackson AL-
134 PM CDT WED JUL 5 2017

...SIGNIFICANT WEATHER ADVISORY FOR EASTERN JACKSON AND NORTHEASTERN
DEKALB COUNTIES UNTIL 215 PM CDT...

At 134 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Stevenson to near Hollywood to near
Section. Movement was east at 25 mph.

Wind gusts up to 50 mph will be possible with these storms.

Locations impacted include...
Scottsboro, Rainsville, Bridgeport, Henagar, Stevenson, Sylvania,
Hollywood, Powell, Section and Ider.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Strong gusty winds will be capable of knocking down small tree limbs
along with other small unsecured items. Seek safe shelter until this
line of storms has passed.

Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike several away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3451 8573 3455 8615 3472 8604 3493 8599
      3499 8583 3498 8561 3474 8556
TIME...MOT...LOC 1834Z 249DEG 20KT 3485 8590 3470 8592 3459 8606

AMP
Special weather statement, Jul 5, 1:39 PM CDT, 39 minutes before
Special Weather Statement
National Weather Service Huntsville AL
139 PM CDT WED JUL 5 2017

ALZ001-004-005-051930-
Lawrence AL-Lauderdale AL-Limestone AL-
139 PM CDT WED JUL 5 2017

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN LAUDERDALE...
NORTHERN LIMESTONE AND NORTH CENTRAL LAWRENCE COUNTIES UNTIL 230 PM
CDT...

At 138 PM CDT, Doppler radar was tracking a cluster of strong
thunderstorms from near Lester to near Anderson to near Killen,
moving northeast at 25 mph.

Winds of 40 to 50 mph will be possible with this storm.

Locations impacted include...
Athens, Rogersville, Ardmore, Killen, Lexington, Elkmont, Anderson,
Lester, Good Springs and Cartwright.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Very heavy rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike several miles away from a thunderstorm. Seek a
safe shelter inside a building or vehicle.

&&

LAT...LON 3499 8678 3489 8678 3471 8738 3475 8743
      3476 8742 3478 8743 3480 8743 3481 8749
      3486 8754 3500 8724
TIME...MOT...LOC 1838Z 236DEG 32KT 3496 8705

AMP
Special weather statement, Jul 5, 1:43 PM CDT, 35 minutes before
Special Weather Statement
National Weather Service Huntsville AL
143 PM CDT WED JUL 5 2017

ALZ006-TNZ076-096-051915-
Madison AL-Moore TN-Lincoln TN-
143 PM CDT WED JUL 5 2017

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN MADISON...MOORE AND
LINCOLN COUNTIES UNTIL 215 PM CDT...

At 142 PM CDT, Doppler radar was tracking a strong thunderstorm 8
miles east of Ardmore, or 12 miles southwest of Fayetteville, moving
northeast at 25 mph. An additional cluster of strong thunderstorms
was located near Elkton, moving east at 25 mph.

Wind gusts up to 50 mph will be possible with these storms.

Locations impacted include...
Fayetteville, Lynchburg, Meridianville, Moores Mill, Hazel Green,
Ardmore, Petersburg, Tims Ford Lake, Lincoln and Hurdlow.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Strong gusty winds will be capable of knocking down small tree limbs
along with other small unsecured items. Seek safe shelter until this
storm has passed.

Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike several miles away from a thunderstorm. Seek a
safe shelter inside a building or vehicle.

&&

LAT...LON 3535 8654 3536 8649 3532 8645 3532 8642
      3535 8640 3524 8628 3522 8632 3521 8629
      3520 8631 3517 8630 3514 8632 3489 8654
      3495 8678 3499 8678 3499 8684 3526 8683
      3525 8675 3531 8668 3533 8660 3537 8659
TIME...MOT...LOC 1842Z 221DEG 24KT 3501 8670

AMP
Special weather statement, Jul 5, 1:54 PM CDT, 24 minutes before
Special Weather Statement
National Weather Service Huntsville AL
154 PM CDT WED JUL 5 2017

ALZ008-009-051930-
Marshall AL-Jackson AL-
154 PM CDT WED JUL 5 2017

...SIGNIFICANT WEATHER ADVISORY FOR SOUTH CENTRAL JACKSON AND
NORTHEASTERN MARSHALL COUNTIES UNTIL 230 PM CDT...

At 154 PM CDT, Doppler radar was tracking a strong thunderstorm near
Grant, or 9 miles northeast of Guntersville, moving northeast at 15
mph.

Winds in excess of 40 mph will be possible with this storm.

Locations impacted include...
Scottsboro, Grant, Section, Langston and Lake Guntersville St Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Strong gusty winds will be capable of knocking down small tree limbs
along with other small unsecured items. Seek safe shelter until this
storm has passed.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike several miles away from a thunderstorm. Seek a
safe shelter inside a building or vehicle.

&&

LAT...LON 3449 8599 3447 8603 3447 8606 3443 8611
      3442 8611 3440 8618 3451 8626 3465 8603
      3453 8593
TIME...MOT...LOC 1854Z 242DEG 15KT 3446 8618

AMP
Special weather statement, Jul 5, 2:07 PM CDT, 11 minutes before
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Special weather statement, Jul 5, 2:09 PM CDT, 9 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 5, 12:35 AM CDTRiver Flood WarningHUNJackson, Madison, Marshall65 hr
Jul 5, 11:27 AM CDTSpecial Weather StatementHUNMorgan33 min
Jul 5, 11:32 AM CDTSpecial Weather StatementHUNDeKalb28 min
Jul 5, 11:37 AM CDTSpecial Weather StatementHUNMorgan38 min
Jul 5, 11:54 AM CDTSpecial Weather StatementHUNLauderdale36 min
Jul 5, 11:58 AM CDTSpecial Weather StatementHUNMadison47 min
Jul 5, 12:19 PM CDTSpecial Weather StatementHUNColbert41 min
Jul 5, 12:26 PM CDTSpecial Weather StatementHUNDeKalb34 min
Jul 5, 12:43 PM CDTSpecial Weather StatementHUNColbert32 min
Jul 5, 12:50 PM CDTSpecial Weather StatementHUNJackson40 min
Jul 5, 12:53 PM CDTSpecial Weather StatementHUNLawrence37 min
Jul 5, 12:56 PM CDTSpecial Weather StatementHUNFranklin34 min
Jul 5, 1:00 PM CDTSpecial Weather StatementHUNLimestone45 min
Jul 5, 1:13 PM CDTSpecial Weather StatementHUNLauderdale32 min
Jul 5, 1:21 PM CDTSpecial Weather StatementHUNMarshall39 min
Jul 5, 1:30 PM CDTSpecial Weather StatementHUNLawrence30 min
Jul 5, 1:34 PM CDTSpecial Weather StatementHUNJackson41 min
Jul 5, 1:39 PM CDTSpecial Weather StatementHUNLimestone51 min
Jul 5, 1:48 PM CDTSevere Thunderstorm WarningHUNLimestone, Madison42 min
Jul 5, 1:54 PM CDTSpecial Weather StatementHUNDeKalb36 min
Jul 5, 2:07 PM CDTSpecial Weather StatementHUNLimestone38 min
Jul 5, 3:10 PM CDTSpecial Weather StatementHUNDeKalb35 min
Jul 5, 3:29 PM CDTSevere Thunderstorm WarningHUNDeKalb31 min
Jul 5, 11:31 AM CDTSpecial Weather StatementHUNMoore29 min
Jul 5, 1:43 PM CDTSpecial Weather StatementHUNLincoln, Moore32 min
Jul 5, 2:09 PM CDTSpecial Weather StatementHUNMoore51 min
Jul 5, 2:39 PM CDTSevere Thunderstorm WarningHUNFranklin21 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2017Every severe thunderstorm warning in 2017

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.