Alert archive / Florida / Special Weather Statements in 2017

Special Weather Statement, NWS Tallahassee, FL

July 5, 2017Leon County, Florida

NWS Tallahassee, FL issued this special weather statement at Jul 5, 2017, 6:13 PM EDT for Leon County, Florida. It was in force for 32 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 5, 2017, 6:13 PM EDT (22:13 UTC)
Expired
Jul 5, 2017, 6:45 PM EDT
In force
32 min
Issued by
NWS Tallahassee, FL

County Leon County, FL

The radar

The Tallahassee radar (KTLH), 37 km from the middle of the area, began a volume at 22:13 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

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 10.2 hours before the alert went out and 35 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, Tallahassee Rgnl, FL at 12:00Z on 2017-07-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 731 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, Tallahassee Rgnl, FL at 12:00Z on 2017-07-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 11 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
731 J/kg
Mixed-layer CIN
-74 J/kg
Mixed-layer LCL
1024 m above ground
0-6 km bulk shear
5 kt
0-1 km storm-relative helicity
11 m²/s²
0-3 km storm-relative helicity
3 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Tallahassee, FL wrote its last area forecast discussion before this special weather statement went out at Jul 5, 2:31 PM EDT, 3 hours 42 minutes earlier.

Area forecast discussion, Jul 5, 2:31 PM EDT, 3 hours 42 minutes before
Area Forecast Discussion
National Weather Service Tallahassee FL
231 PM EDT Wed Jul 5 2017

.NEAR TERM [Through Tonight]...

Isolated to scattered convection remains possible this afternoon
along the sea breeze across the panhandle and big bend with a few
storms also possible in portions of south central Georgia. Activity
will dissipate rapidly around sunset with overnight low mainly in
the middle 70s.

.SHORT TERM [Thursday Through Friday Night]...

A surface ridge axis will be aligned east-west over or just south of
the area through the period. The deep layer dry air evident on
today's water vapor imagery will remain in place as well, keeping PW
below seasonal levels and helping to suppress convective
coverage. Therefore, PoPs will be below normal and temps will
remain above normal. A front will approach from the northwest on
Friday, slightly increasing PoPs across our northwest zones. While
overall convective coverage will be below normal, dry air aloft
will support some stronger wind gusts in any storms that do form
each afternoon.

.LONG TERM [Saturday Through Wednesday]...

A weak upper level trough will be over the region for most of this
period with the surface ridge axis south of the area. A front will
slip into the area over the weekend and then dissipate. These
features will result in PoPs returning to more seasonal levels (40-
50%). Daytime highs will be in the lower 90s with overnight lows in
the lower to mid 70s.

&&

.AVIATION [Through 18Z Thursday]...

[Through 18z Thursday] VFR conditions are expected to prevail.
Isolated to scattered convection is possible near ECP, TLH, and VLD
this afternoon, but the chance appears too low to mention anything
in the TAF at this time.

&&

.MARINE...

Light winds and seas are expected to prevail through the period
outside of any showers and thunderstorms.

&&

.FIRE WEATHER...

Dispersion indices may be high Thursday afternoon for parts of
southwest Georgia. There are no other fire weather concerns.

&&

.HYDROLOGY...

Shower and thunderstorm activity will remain isolated to scattered
in nature for the next couple of days, increasing somewhat for the
weekend and early next week. There will be minimal changes for
flooding and area rivers and streams will remain below flood
stage.

&&

.PRELIMINARY POINT TEMPS/POPS...

Tallahassee   75  95  74  95  74 /  10  30  10  20  10
Panama City   78  90  78  89  78 /   0  20  10  20  10
Dothan        75  95  74  93  74 /   0  20  10  20  20
Albany        75  95  74  94  74 /  10  20  10  20  20
Valdosta      73  96  73  95  73 /  20  30  10  20  10
Cross City    74  94  74  94  74 /  10  20  10  20  10
Apalachicola  76  91  77  91  77 /   0  20  10  10  10

&&

.TAE WATCHES/WARNINGS/ADVISORIES...

FL...None.
GA...None.
AL...None.
GM...None.

&&

NEAR TERM...DVD
SHORT TERM...Wool
LONG TERM...Wool
AVIATION...DVD
MARINE...Wool
FIRE WEATHER...Weston
HYDROLOGY...Wool

In the hours before

Special weather statement, Jul 5, 4:13 PM EDT, 2 hours before
Special Weather Statement
National Weather Service Tallahassee FL
413 PM EDT WED JUL 5 2017

FLZ026-027-127-052045-
Liberty FL-Coastal Wakulla FL-Inland Wakulla FL-
413 PM EDT WED JUL 5 2017

...SIGNIFICANT WEATHER ADVISORY FOR WESTERN WAKULLA AND SOUTHERN
LIBERTY COUNTIES UNTIL 445 PM EDT...

At 413 PM EDT, National Weather Service doppler radar indicated a
strong thunderstorms along a line extending from 14 miles east of
Stonemill Creek to 14 miles southwest of Crawfordville. Movement was
north at 10 mph.

Winds in excess of 40 mph will be possible with these storms.

Locations impacted include...
Orange, Sopchoppy, East Camp, Jewel Fire Tower, Vilas, Jensen Place,
Central City, Sanborn, Owens Bridge, Poplar Camp, Smith Creek,
Estiffanulga, Kern, Wilma, Nixon Garden and Twin Pole.

LAT...LON 3003 8499 3028 8506 3029 8505 3030 8506
      3031 8503 3032 8504 3031 8479 3030 8471
      3030 8440 3001 8449
TIME...MOT...LOC 2013Z 179DEG 8KT 3011 8494 3009 8456

42-DVD
Special weather statement, Jul 5, 4:26 PM EDT, 1 hour 47 minutes before
Special Weather Statement
National Weather Service Tallahassee FL
426 PM EDT WED JUL 5 2017

FLZ029-052100-
Lafayette FL-
426 PM EDT WED JUL 5 2017

...SIGNIFICANT WEATHER ADVISORY FOR LAFAYETTE COUNTY UNTIL 500 PM
EDT...

At 426 PM EDT, National Weather Service doppler radar indicated a a
strong thunderstorm over Mayo, moving northeast at 10 mph.

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

Locations impacted include...
Mayo, Buckville, San Pedro Junction and Alton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 2991 8309 3003 8337 3007 8337 3021 8325
      3018 8325 3017 8323 3015 8324 3014 8323
      3011 8323 3010 8321 3011 8320 3010 8318
      3011 8316 3010 8313 3010 8312 3008 8307
      3006 8307 3004 8303
TIME...MOT...LOC 2026Z 211DEG 7KT 3005 8319

42-DVD
Special weather statement, Jul 5, 4:45 PM EDT, 1 hour 28 minutes before
Special Weather Statement
National Weather Service Tallahassee FL
445 PM EDT WED JUL 5 2017

FLZ017-027-052115-
Inland Wakulla FL-Leon FL-
445 PM EDT WED JUL 5 2017

...SIGNIFICANT WEATHER ADVISORY FOR WESTERN WAKULLA AND SOUTH CENTRAL
LEON COUNTIES UNTIL 515 PM EDT...

At 445 PM EDT, National Weather Service doppler radar indicated a a
strong thunderstorm 13 miles west of Crawfordville, moving northeast
at 20 mph.

Winds near 40 mph will be possible with this storm.

Locations impacted include...
Crawfordville, Woodville, Tallahassee, Lake Bradford, Brown House,
Leon Sinks, Andrew, Lake Munson, Wakulla Springs, Arran,
Hilliardville, Eight Mile Pond, Vereen, Bethel, Tallahassee Regional
A/P, Helen and Smith Creek.

LAT...LON 3024 8469 3047 8442 3047 8441 3028 8420
      3003 8457
TIME...MOT...LOC 2045Z 234DEG 19KT 3021 8457

42-DVD
Local storm report, Jul 5, 5:07 PM EDT, 1 hour 6 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
507 PM EDT WED JUL 05 2017

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

0500 PM     TSTM WND DMG     BUCKVILLE               30.13N 83.29W
07/05/2017                   LAFAYETTE          FL   911 CALL CENTER

            COUNTY DISPATCH REPORTED A COUPLE TREES AND POWER LINES
            DOWN ALONG HWY 53.

&&

LAHR
Special weather statement, Jul 5, 5:10 PM EDT, 1 hour 3 minutes before
Special Weather Statement
National Weather Service Tallahassee FL
510 PM EDT WED JUL 5 2017

FLZ017-027-052200-
Inland Wakulla FL-Leon FL-
510 PM EDT WED JUL 5 2017

...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN WAKULLA AND LEON
COUNTIES UNTIL 600 PM EDT...

At 510 PM EDT, National Weather Service doppler radar indicated a a
strong thunderstorm 9 miles northwest of Crawfordville, moving
northeast at 15 mph.

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

Locations impacted include...
Woodville, Tallahassee, Crawfordville, Florida State University,
Florida A And M, Tallahassee Comm College, Doak Campbell Stadium,
Lake Bradford, Leon Sinks, Gaither Community Center, Wakulla Springs,
Tallahassee Memorial Hosp, Eight Mile Pond, Tallahassee Mall, Bethel,
Tallahassee Regional A/P, Governors Square Mall, Natural Bridge,
Belair and Levy Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 3030 8458 3041 8453 3046 8447 3046 8446
      3047 8441 3048 8440 3051 8440 3057 8432
      3042 8407 3036 8408 3031 8409 3019 8437
TIME...MOT...LOC 2110Z 226DEG 14KT 3029 8444

42-DVD
Special weather statement, Jul 5, 6:13 PM EDT, 0 minutes before
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The office that day

Everything else NWS Tallahassee, FL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 5, 2:53 PM EDTSpecial Weather StatementTAEGilchrist37 min
Jul 5, 3:17 PM EDTSpecial Weather StatementTAEDixie43 min
Jul 5, 4:13 PM EDTSpecial Weather StatementTAELiberty32 min
Jul 5, 4:26 PM EDTSpecial Weather StatementTAELafayette34 min
Jul 5, 4:30 PM EDTSevere Thunderstorm WarningTAELafayette45 min
Jul 5, 4:45 PM EDTSpecial Weather StatementTAEWakulla30 min
Jul 5, 5:10 PM EDTSpecial Weather StatementTAELeon50 min
Jul 5, 5:34 PM EDTSevere Thunderstorm WarningTAELeon, Wakulla41 min
Jul 5, 6:26 PM EDTSpecial Weather StatementTAEJackson34 min
Jul 5, 6:31 PM EDTSpecial Weather StatementTAELanier29 min

Nearby

Special Weather Statements in Florida, 2017Every special weather statement 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.