Alert archive / Georgia / Special Weather Statements in 2021

Special Weather Statement, NWS Jacksonville, FL

June 12, 2021Coffee County, Georgia

NWS Jacksonville, FL issued this special weather statement at Jun 12, 2021, 7:02 PM EDT for Coffee County, Georgia. It was in force for 28 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
Jun 12, 2021, 7:02 PM EDT (23:02 UTC)
Expired
Jun 12, 2021, 7:30 PM EDT
In force
28 min
Issued by
NWS Jacksonville, FL

County Coffee County, GA

The radar

The Moody AFB radar (KVAX), 67 km from the middle of the area, began a volume at 23:02 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, 11.0 hours before the alert went out and 169 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 2021-06-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1723 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 2021-06-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 88 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
1723 J/kg
Mixed-layer CIN
-15 J/kg
Mixed-layer LCL
555 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
88 m²/s²
0-3 km storm-relative helicity
77 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 Jun 12, 3:17 PM EDT, 3 hours 45 minutes earlier.

Area forecast discussion, Jun 12, 3:17 PM EDT, 3 hours 45 minutes before
Area Forecast Discussion
National Weather Service Jacksonville FL
317 PM EDT Sat Jun 12 2021

.Short Term.../through Monday/...

A cold front will move into SE GA this afternoon, then nearly
stationary near the GA/FL line through Tonight. The area will also
be in the base of an 500mb trough through Tonight. The combination
of diurnal heating, frontal convergence, and upper energy will
provide for an increased chance for convection this afternoon and
evening. While the activity will decrease in coverage through the
night due to loss of diurnal heating, storm chances will linger.

On Sunday, the cold front will remain across the region with the
500mb trough in place. Scattered to numerous storms will be expected
once again.

The frontal boundary will sink to the southeast and weaken Sunday
night.

For Monday, the upper trough will remain over the region, with the
combination of diurnal heating and upper support leading to
scattered to numerous storms. The best chance will be across NE FL,
closer to the dissipating cold frontal zone.

Temperatures will trend around seasonal averages this period.

&&

.Long Term.../Monday night through Saturday/...

Another frontal boundary will slide southeast into SE GA Monday
night. The boundary will move to near the GA/FL line Tuesday and
stall through Thursday. Above average coverage of showers and storms
will be expected through Thursday due to the frontal convergence and
diurnal instability. The greatest chance for storms will be across
NE FL.

Another trough will be over the region Friday into Saturday,
enhancing the diurnally driven convective activity.

Temperatures will trend near to a little above normal early in the
period, then near to a little below.

&&

.Marine...

A few troughs will affect the region over the next week, leading
to a period with above average chances for showers and storms.

Rip Currents: SE GA: Low through Sunday
              NE FL: Low through Sunday

&&

.PRELIMINARY POINT TEMPS/POPS...

AMG  70  87  69  91  71 /  70  40  20  30  10
SSI  73  85  73  84  74 /  50  40  40  30  20
JAX  72  91  70  89  71 /  30  50  50  50  20
SGJ  73  89  71  86  73 /  30  60  50  60  30
GNV  73  90  70  87  71 /  30  60  60  70  30
OCF  73  89  72  87  72 /  30  60  60  70  30

&&

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

In the hours before

Special weather statement, Jun 12, 5:37 PM EDT, 1 hour 25 minutes before
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Special weather statement, Jun 12, 5:53 PM EDT, 1 hour 9 minutes before
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Special weather statement, Jun 12, 5:56 PM EDT, 1 hour 6 minutes before
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Local storm report, Jun 12, 5:58 PM EDT, 1 hour 4 minutes before
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Special weather statement, Jun 12, 6:44 PM EDT, 18 minutes before
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Special weather statement, Jun 12, 7:02 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
Jun 12, 12:51 PM EDTSpecial Weather StatementJAXGilchrist24 min
Jun 12, 1:22 PM EDTSpecial Weather StatementJAXAlachua, Bradford, Clay, Gilchrist, Putnam, Union38 min
Jun 12, 1:50 PM EDTSpecial Weather StatementJAXClay, Putnam40 min
Jun 12, 1:59 PM EDTSpecial Weather StatementJAXSuwannee46 min
Jun 12, 2:11 PM EDTSpecial Weather StatementJAXBradford, Clay49 min
Jun 12, 2:15 PM EDTSpecial Marine WarningJAX90 min
Jun 12, 2:46 PM EDTSpecial Weather StatementJAXHamilton44 min
Jun 12, 2:50 PM EDTSpecial Weather StatementJAXClay, Saint Johns40 min
Jun 12, 2:51 PM EDTSpecial Marine WarningJAX84 min
Jun 12, 2:53 PM EDTSpecial Weather StatementJAXColumbia, Union37 min
Jun 12, 2:59 PM EDTSevere Thunderstorm WarningJAXDuval14 min
Jun 12, 3:22 PM EDTSevere Thunderstorm WarningJAXBaker, Columbia, Hamilton53 min
Jun 12, 3:25 PM EDTSpecial Weather StatementJAXNassau50 min
Jun 12, 3:27 PM EDTSpecial Weather StatementJAXSuwannee48 min
Jun 12, 3:33 PM EDTSpecial Marine WarningJAX87 min
Jun 12, 4:10 PM EDTSevere Thunderstorm WarningJAXBaker, Columbia, Hamilton, Nassau, Union25 min
Jun 12, 4:15 PM EDTSpecial Weather StatementJAXNassau45 min
Jun 12, 5:26 PM EDTSpecial Marine WarningJAX64 min
Jun 12, 2:02 PM EDTSpecial Weather StatementJAXGlynn43 min
Jun 12, 3:46 PM EDTSpecial Weather StatementJAXWayne44 min
Jun 12, 4:27 PM EDTSpecial Weather StatementJAXWayne48 min
Jun 12, 4:37 PM EDTSpecial Weather StatementJAXCamden38 min
Jun 12, 5:00 PM EDTSpecial Weather StatementJAXBrantley30 min
Jun 12, 5:10 PM EDTSpecial Weather StatementJAXBrantley, Pierce50 min
Jun 12, 5:20 PM EDTSevere Thunderstorm WarningJAXBrantley25 min
Jun 12, 5:22 PM EDTSpecial Weather StatementJAXAtkinson53 min
Jun 12, 5:37 PM EDTSpecial Weather StatementJAXJeff Davis38 min
Jun 12, 5:53 PM EDTSpecial Weather StatementJAXBrantley, Pierce52 min
Jun 12, 5:56 PM EDTSpecial Weather StatementJAXAtkinson49 min
Jun 12, 6:44 PM EDTSpecial Weather StatementJAXAtkinson46 min
Jun 12, 7:12 PM EDTSpecial Weather StatementJAXWayne33 min
Jun 12, 7:21 PM EDTSevere Thunderstorm WarningJAXAtkinson, Clinch, Coffee39 min
Jun 12, 7:31 PM EDTSpecial Weather StatementJAXWayne44 min
Jun 12, 7:42 PM EDTSpecial Weather StatementJAXAppling, Jeff Davis48 min
Jun 12, 7:45 PM EDTSpecial Weather StatementJAXBacon30 min
Jun 12, 7:57 PM EDTSevere Thunderstorm WarningJAXAppling, Bacon, Coffee, Jeff Davis33 min

Nearby

Special Weather Statements in Georgia, 2021Every special weather statement in 2021

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.