Alert archive / Georgia / Special Weather Statements in 2018

Special Weather Statement, NWS Jacksonville, FL

August 6, 2018Clinch County, Georgia

NWS Jacksonville, FL issued this special weather statement at Aug 6, 2018, 7:52 PM EDT for Clinch County, Georgia. It was in force for 38 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, 7:52 PM EDT (23:52 UTC)
Expired
Aug 6, 2018, 8:30 PM EDT
In force
38 min
Issued by
NWS Jacksonville, FL

County Clinch County, GA

The radar

The Moody AFB radar (KVAX), 37 km from the middle of the area, began a volume at 23:51 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

Jacksonville, FL (KJAX), launched 12:00Z, 11.9 hours before the alert went out and 118 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, Jacksonville, FL at 12:00Z on 2018-08-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 543 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, Jacksonville, FL at 12:00Z on 2018-08-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 35 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
543 J/kg
Mixed-layer CIN
-98 J/kg
Mixed-layer LCL
1078 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
35 m²/s²
0-3 km storm-relative helicity
56 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 Jacksonville, FL wrote its last area forecast discussion before this special weather statement went out at Aug 6, 2:54 PM EDT, 4 hours 58 minutes earlier.

Area forecast discussion, Aug 6, 2:54 PM EDT, 4 hours 58 minutes before
Area Forecast Discussion
National Weather Service Jacksonville FL
254 PM EDT Mon Aug 6 2018

.NEAR TERM /Through Tuesday/...

Widely scattered convection was developing across southeast
Georgia this afternoon, and this will push westward through the
rest of the day. A few showers could develop across interior
southeast Georgia as the east coast sea breeze moves inland, but
overall rain chances will be low.

Mid/upper level high pressure was centered over southwestern
Georgia, and a shortwave was moving westward through the Florida
peninsula this afternoon. The shortwave will move through
northeast Florida overnight tonight, with drier air moving into
the region from the east on Tuesday. Low rain chances will
continue again due to high pressure overhead, with the best chance
of showers/storms across interior southeast Georgia and Marion
County in northeast Florida.

.SHORT TERM /Tuesday Night Through Wednesday Night/...

Upper level ridging will be centered over northeast Florida
through Wednesday night, but will weaken slightly on Wednesday.
The low/mid level ridge will shift to the southeast, and moisture
is forecast to increase slightly. This will lead to slightly
higher rain chances across northeast Florida in the 20-30% range
Wednesday afternoon into the early evening. Lows will be in the
low to mid 70s, with highs 90-95F.

.LONG TERM /Thursday Through Sunday/...

Thursday and Friday: The extended period begins with an upper
level ridge centered over north or central Florida and the mid &
low level ridges over the Bahamas and western Atlantic,
respectively, providing deep westerly flow. The ridging will shift
to the south and west by Friday morning as a shortwave moves
across the Southern Plains and into the Tennessee Valley. Some
drier air will either move into the region from the northeastern
Gulf or already be present on Thursday, leading to low rain
chances in the 20-30% range areawide. Similar conditions are
forecast for Friday before an upper level trough pushes into the
Southeast. High temperatures will be warm in the low to mid 90s.

Saturday and Sunday: Deep southwesterly flow is forecast to
develop as an upper level trough carves out across the eastern
conus. Precipitable water values are forecast to increase to
around 2 inches, with 40-60% chances of rain returning to the
region. Temperatures will moderate back to the upper 80s to lower
90s due to increased cloud cover and rainfall chances.

&&

.AVIATION...
Inland storms are expected this afternoon, and can not be ruled
out, especially at KGNV, but the chance is too low for inclusion
in the TAF at this time.

Patchy fog could affect KVQQ/KGNV tonight, with possible
restrictions. Otherwise, prevailing VFR conditions are expected
this 18z TAF period.

&&

.MARINE...

Rip Currents:

&&

.PRELIMINARY POINT TEMPS/POPS...
AMG  74  92  74  92 /  20  40  20  20
SSI  77  88  76  91 /  10  10  10  30
JAX  74  93  74  93 /  10  10  10  30
SGJ  74  89  74  90 /  10  10   0  30
GNV  73  93  73  92 /  10  20  10  30
OCF  73  93  73  92 /  10  30  20  30

&&

.JAX WATCHES/WARNINGS/ADVISORIES...
FL...None.
GA...None.
AM...None.
&&

Kennedy/23/Hess

In the hours before

Local storm report, Aug 6, 6:07 PM EDT, 1 hour 45 minutes before
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Local storm report, Aug 6, 6:12 PM EDT, 1 hour 40 minutes before
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Special weather statement, Aug 6, 6:25 PM EDT, 1 hour 27 minutes before
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Special weather statement, Aug 6, 6:57 PM EDT, 55 minutes before
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Special weather statement, Aug 6, 7:22 PM EDT, 30 minutes before
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Special weather statement, Aug 6, 7:52 PM EDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 6, 4:37 PM EDTSpecial Weather StatementJAXCoffee23 min
Aug 6, 5:11 PM EDTSpecial Weather StatementJAXJeff Davis49 min
Aug 6, 5:32 PM EDTSevere Thunderstorm WarningJAXAppling, Bacon, Coffee, Jeff Davis43 min
Aug 6, 6:25 PM EDTSpecial Weather StatementJAXAtkinson35 min
Aug 6, 6:57 PM EDTSpecial Weather StatementJAXAtkinson33 min
Aug 6, 7:22 PM EDTSpecial Weather StatementJAXWare23 min
Aug 6, 7:46 PM EDTAreal Flood AdvisoryJAXAtkinson, Clinch2 hr

Nearby

Special Weather Statements in Georgia, 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.