Alert archive / Florida / Special Weather Statements in 2018

Special Weather Statement, NWS Tallahassee, FL

August 6, 2018Madison County, Florida

NWS Tallahassee, FL issued this special weather statement at Aug 6, 2018, 9:30 PM EDT for Madison County, Florida. 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 outline as issued.

The facts

Issued
Aug 6, 2018, 9:30 PM EDT (01:30 UTC)
Expired
Aug 6, 2018, 10:00 PM EDT
In force
30 min
Issued by
NWS Tallahassee, FL

County Madison County, FL

The radar

The Moody AFB radar (KVAX), 60 km from the middle of the area, began a volume at 01:29 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 00:00Z, 1.5 hours before the alert went out and 96 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 00:00Z on 2018-08-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 266 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 00:00Z on 2018-08-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 13 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
266 J/kg
Mixed-layer CIN
-197 J/kg
Mixed-layer LCL
1716 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
13 m²/s²
0-3 km storm-relative helicity
26 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 Aug 6, 7:41 PM EDT, 1 hour 49 minutes earlier.

Area forecast discussion, Aug 6, 7:41 PM EDT, 1 hour 49 minutes before
Area Forecast Discussion
National Weather Service Tallahassee FL
741 PM EDT Mon Aug 6 2018

.UPDATE...

Showers and thunderstorms will dissipate before midnight. No
significant changes were made with the evening update.

&&

.AVIATION [Through 00Z Wednesday]...

Scattered showers and thunderstorms will dissipate before midnight.
VFR conditions are expected outside of thunderstorms but isolated
patchy fog cannot be ruled out in the early morning hours.
Scattered showers and thunderstorms will return tomorrow.

&&

.PREV DISCUSSION [349 PM EDT]...

.NEAR TERM [Through Tonight]...

An upper high pressure system over the southeast states will
persist through tonight while an inverted upper level trough moves
westward over the northeast Gulf of Mexico. A surface ridge of
high pressure extending along the Appalachian Mountains to the
northeast Gulf of Mexico will remain largely in place, but models
are hinting toward a possible weak easterly wave forming late
tonight across northeast gulf. With the approach of the upper
level wave and a sea breeze pushing inland, the ongoing isolated
to scattered afternoon convection will persist throughout the
evening, and then gradually dissipate after midnight mainly across
the inland areas.

.SHORT TERM [Tuesday Through Wednesday Night]...

The inverted upper level trough will continue to move westward
from the northeast Gulf of Mexico to the north central gulf
throughout the day Tuesday. The combination of upper level
impulses associated with the trough moving over the forecast area
on Tuesday, decreasing stability due to strong surface heating and
another sea breeze pushing inland, isolated to scattered showers
and thunderstorms will re-develop early in the day and persist
through much of the day, with coverage decreasing slightly across
the eastern portions of the forecast area by late afternoon. Rain
chances are then a bit lower on Wednesday due to increased
subsidence and drier air beneath a region of high pressure that
moves overhead. With plenty of sunshine each afternoon, high
temperatures will range from 90 to 95 inland areas with heat
indices expected to top out between 101 to 106 degrees.

.LONG TERM [Thursday Through Monday]...

As broad troughing settles in over the eastern CONUS it
sandwiches the local area between it and high pressure to our
south. This brings a period of unsettled weather Thursday and
Friday as a west-southwest flow maintains deep layer moisture and
scattered to numerous showers and thunderstorms develop each day.
A series of shortwave troughs then act to deepen the broader
eastern CONUS trough on Saturday, causing it to dig southward
towards the Gulf Coast where it remains until Monday. This will
continue the pattern of unsettled weather for the local area
straight through the weekend and into early next week. Expect
temperatures to cool somewhat due to the increased coverage of
clouds and rain, with highs in the upper 80s to around 90 degrees.

.MARINE...

Weak high pressure across the southeast states will
gradually shift south over the eastern Gulf of Mexico through
midweek and then persist into the weekend. Favorable marine
conditions throughout the week with light winds and low seas. A
slight uptick in winds and seas can be expected heading into the
weekend.

.FIRE WEATHER...

Surface high pressure will persist across the region
with relative humidity values remaining above critical thresholds.
Isolated to scattered showers and thunderstorm coverages expected
through midweek, with heat indices again climbing to between 100 to
106 Tuesday afternoon. Relative humidity values will remain above
critical thresholds for the next several days, so no red flag
conditions are forecast.

.HYDROLOGY...

The St Marks river at Newport remains in minor flood stage and is
expected to fall below flood stage during the latter half of this
week. The Apalachicola and Ochlockonee rivers will hover in action
stage for the next several days with slow falls expected after
midweek. Though summertime showers and storms in the afternoon
are anticipated, no additional flooding is forecast.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not requested. However, spotters are always
encouraged to safely report significant weather conditions when they
occur by calling the office or tweeting us @NWSTallahassee.

&&

.PRELIMINARY POINT TEMPS/POPS...

Tallahassee   73  93  73  93  74 /  40  40  10  30  10
Panama City   76  92  75  89  76 /  40  50  10  20  20
Dothan        75  93  73  92  73 /  40  40  20  30  10
Albany        76  93  74  92  74 /  50  40  20  30  10
Valdosta      73  92  73  93  74 /  50  30  20  30  10
Cross City    73  92  74  91  75 /  30  20  10  20  10
Apalachicola  77  90  75  88  77 /  40  40  10  20  10

&&

.TAE WATCHES/WARNINGS/ADVISORIES...
FL...None.
GA...None.
AL...None.
GM...None.
&&

UPDATE...McD
NEAR TERM...JP
SHORT TERM...TRC
LONG TERM...TRC
AVIATION...McD
MARINE...JP
FIRE WEATHER...JP
HYDROLOGY...DRJohnson

In the hours before

Local storm report, Aug 6, 7:52 PM EDT, 1 hour 38 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
752 PM EDT MON AUG 6 2018

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

0735 PM     TSTM WND DMG     3 SSW PUTNEY            31.43N 84.12W
08/06/2018                   MITCHELL           GA   LAW ENFORCEMENT

            GRASS FIRE DUE TO POWER LINE ALONG HIGHWAY
            19 NORTH...LIKELY ALREADY OUT DUE TO RAIN.
            REPORT VIA MITCHELL COUNTY SCANNER.

&&
Special weather statement, Aug 6, 7:56 PM EDT, 1 hour 34 minutes before
Special Weather Statement
National Weather Service Tallahassee FL
756 PM EDT MON AUG 6 2018

ALZ067-069-GAZ121-123-142-143-155-070030-
Henry AL-Houston AL-Miller GA-Calhoun GA-Seminole GA-Clay GA-
Early GA-
756 PM EDT MON AUG 6 2018

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN HENRY AND EASTERN
HOUSTON COUNTIES IN SOUTHEASTERN ALABAMA...WESTERN MILLER...
SOUTHEASTERN CLAY...SOUTHWESTERN CALHOUN...EARLY AND NORTHWESTERN
SEMINOLE COUNTIES IN SOUTHWESTERN GEORGIA UNTIL 830 PM EDT/730 PM
CDT/...

At 755 PM EDT/655 PM CDT/, Doppler radar was tracking a strong
thunderstorm near Edison, or 7 miles west of Morgan, moving southwest
at 20 mph. Other strong storms were located in eastern Houston
county.

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

Locations impacted include...
Colquitt, Morgan, Donalsonville, Blakely, Ashford, Cowarts, Edison,
Arlington, Webb, Columbia, Douglasville, Centerville, Avon, Gordon,
Iron City, Damascus, Jakin, Bellville, Haleburg and Bluffton.

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 3152 8455 3143 8460 3143 8464 3136 8464
      3094 8486 3098 8500 3100 8500 3100 8507
      3111 8539 3163 8497
TIME...MOT...LOC 2355Z 035DEG 19KT 3152 8472

42-DVD
Local storm report, Aug 6, 8:59 PM EDT, 31 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
859 PM EDT MON AUG 6 2018

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

0645 PM     TSTM WND DMG     1 SSW SYLVESTER AIRPORT 31.55N 83.90W
08/06/2018                   WORTH              GA   LAW ENFORCEMENT

            TREE DOWN ON OLD SR50.

0715 PM     TSTM WND DMG     2 SE ACREE              31.53N 83.97W
08/06/2018                   WORTH              GA   LAW ENFORCEMENT

            POWER LINE DOWN NEAR DOGWOOD LANE AND WYNN
            DRIVE.

&&
Special weather statement, Aug 6, 9:23 PM EDT, 7 minutes before
Special Weather Statement
National Weather Service Tallahassee FL
823 PM CDT MON AUG 6 2018

ALZ067-069-070215-
Henry AL-Houston AL-
823 PM CDT MON AUG 6 2018

...SIGNIFICANT WEATHER ADVISORY FOR HENRY AND NORTHEASTERN HOUSTON
COUNTIES UNTIL 915 PM CDT...

At 823 PM CDT, Doppler radar was tracking a strong thunderstorm 7
miles south of Abbeville, moving west at 30 mph.

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

Locations impacted include...
Abbeville, Headland, Dothan, Kinsey, Ashford, Cowarts, Webb,
Columbia, Avon, Newville, Haleburg, Shorterville, Tumbleton, Kirkland
Crossroads, Sigma, Grandberry Crossroads, Enon, Hayes, Wilson Mill
and Barber.

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 3161 8506 3157 8506 3154 8504 3147 8507
      3143 8507 3143 8508 3137 8509 3130 8509
      3128 8511 3123 8510 3118 8511 3110 8534
      3135 8542 3158 8542
TIME...MOT...LOC 0123Z 094DEG 25KT 3146 8521

42-DVD
Special weather statement, Aug 6, 9:29 PM EDT, 1 minute before
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Special weather statement, Aug 6, 9:30 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
Aug 6, 10:28 PM EDTSpecial Weather StatementTAECalhoun, Liberty32 min
Aug 6, 10:51 PM EDTSpecial Weather StatementTAELiberty39 min
Aug 6, 11:01 PM EDTSpecial Weather StatementTAEJefferson, Leon44 min
Aug 6, 11:15 PM EDTSevere Thunderstorm WarningTAEGulf, Liberty45 min
Aug 7, 12:31 AM EDTSpecial Marine WarningTAE59 min
Aug 7, 12:55 AM EDTSpecial Marine WarningTAE65 min
Aug 7, 1:16 AM EDTSpecial Marine WarningTAE59 min
Aug 7, 1:55 AM EDTSpecial Marine WarningTAE65 min
Aug 7, 6:40 PM EDTSpecial Weather StatementTAEWashington50 min
Aug 6, 8:06 PM EDTSevere Thunderstorm WarningTAECalhoun, Clay, Early39 min
Aug 6, 8:25 PM EDTAreal Flood AdvisoryTAEBaker, Calhoun, Clay, Early, Randolph2 hr
Aug 6, 8:32 PM EDTSevere Thunderstorm WarningTAEBaker, Calhoun, Clay, Decatur, Early, Miller and 3 more58 min
Aug 6, 9:29 PM EDTSpecial Weather StatementTAEDecatur, Seminole46 min
Aug 6, 9:23 PM EDTSpecial Weather StatementTAEHenry, Houston52 min
Aug 6, 9:46 PM EDTSpecial Weather StatementTAEDale29 min

Nearby

Special Weather Statements in Florida, 2018Every special weather statement in 2018

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.