Alert archive / Georgia / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 105, NWS Jacksonville, FL

June 25, 20185 counties in Georgia

NWS Jacksonville, FL issued this severe thunderstorm warning at Jun 25, 2018, 9:55 PM EDT for 5 counties in Georgia. It was in force for 50 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: Jun 25, 2018, 9:55 PM EDT (01:55 UTC)
Expired: Jun 25, 2018, 10:45 PM EDT
In force: 50 min
Issued by: NWS Jacksonville, FL
Area: Storm-based polygon
Hail: 0.88 in
Wind: 60.0 mph

Counties Appling County, GA, Bacon County, GA, Coffee County, GA, Pierce County, GA, Ware County, GA

The radar

The Moody AFB radar (KVAX), 82 km from the middle of the area, began a volume at 01:55 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, 1.9 hours before the alert went out and 212 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1383 J/kg
Mixed-layer CIN: -34 J/kg
Mixed-layer LCL: 1331 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: -29 m²/s²
0-3 km storm-relative helicity: 81 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 Jacksonville, FL wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 25, 9:02 PM EDT, 53 minutes earlier.

Area forecast discussion, Jun 25, 9:02 PM EDT, 53 minutes before

Area Forecast Discussion
National Weather Service Jacksonville FL
902 PM EDT Mon Jun 25 2018

.UPDATE...Storms developed over central Ga this afternoon and now
are moving south across the Alatamaha River. Southeast Ga remains
moist and unstable enough to keep convection going...possibly
reaching near the Ga-Fl border this evening per the HRRR model.
Expect a weakening trend as instability slowly fades with
convection ending shortly after midnight. Isolated convection over
the Suwannee Valley of ne Fl with the seabreeze should wind down
by midnight.

&&

.AVIATION...VFR conditions will prevail tonight through Tuesday
morning. Storms currently over se Ga may affect SSI mainly between
02z-06z.

&&

.MARINE... Southwest winds at 15 knots or less with afternoon sea
breezes forming near the coast Tuesday afternoon. Seas in 2-4 foot
range.

Rip Currents: Low risk.

&&

.PRELIMINARY POINT TEMPS/POPS...
AMG  74  94  74  93 /  50  40  20  30
SSI  78  89  78  90 /  40  40  10  30
JAX  75  94  75  93 /  10  30  10  40
SGJ  76  91  75  90 /  10  30  10  30
GNV  73  93  74  92 /  30  40  30  40
OCF  73  92  74  90 /  30  40  30  30

&&

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

Zibura/Kennedy/Wolf

In the hours before

Special weather statement, Jun 25, 8:43 PM EDT, 1 hour 12 minutes before

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Special weather statement, Jun 25, 8:53 PM EDT, 1 hour 2 minutes before

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Special weather statement, Jun 25, 8:58 PM EDT, 57 minutes before

Special Weather Statement
National Weather Service Jacksonville FL
858 PM EDT MON JUN 25 2018

GAZ132>134-260145-
Bacon GA-Coffee GA-Jeff Davis GA-
858 PM EDT MON JUN 25 2018

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN COFFEE...
NORTHWESTERN BACON AND JEFF DAVIS COUNTIES UNTIL 945 PM EDT...

At 858 PM EDT, Doppler radar was tracking a strong thunderstorm over
Snipesville, or 9 miles southwest of Hazlehurst, moving southeast at
20 mph.

Excessive cloud-to-ground lightning and wind gusts of 40 to 50 mph
can be expected along with possible minor damage.

Locations impacted include...
Hazlehurst, Snipesville and Denton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential 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 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3179 8252 3175 8252 3175 8255 3174 8255
      3174 8252 3171 8252 3171 8249 3166 8245
      3158 8269 3178 8294 3178 8292 3179 8290
      3178 8287 3182 8284 3184 8278 3185 8279
      3186 8276 3191 8268
TIME...MOT...LOC 0058Z 310DEG 20KT 3176 8271

AK

Special weather statement, Jun 25, 9:21 PM EDT, 34 minutes before

Special Weather Statement
National Weather Service Jacksonville FL
921 PM EDT MON JUN 25 2018

GAZ134>136-151-152-260200-
Pierce GA-Bacon GA-Appling GA-Brantley GA-Wayne GA-
921 PM EDT MON JUN 25 2018

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL PIERCE...NORTH CENTRAL
BRANTLEY...SOUTHEASTERN BACON...WAYNE AND SOUTHEASTERN APPLING
COUNTIES UNTIL 1000 PM EDT...

At 920 PM EDT, Doppler radar was tracking a strong thunderstorm 9
miles southwest of Odum, or 9 miles south of Surrency, moving south
at 15 mph.

Nickel size hail, excessive cloud-to-ground lightning and wind gusts
of 45 to 55 mph can be expected along with possible minor damage.

Locations impacted include...
Jesup, Patterson, Screven, Odum, Offerman, Bristol and Broadhurst.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential 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 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3169 8187 3168 8185 3137 8179 3131 8232
      3169 8237 3171 8188
TIME...MOT...LOC 0120Z 348DEG 19KT 3159 8215

AK

Special weather statement, Jun 25, 9:31 PM EDT, 24 minutes before

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Special weather statement, Jun 25, 9:37 PM EDT, 18 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 25, 8:53 PM EDT	Special Weather Statement	JAX	Gilchrist	37 min
Jun 25, 9:31 PM EDT	Special Weather Statement	JAX	Suwannee	29 min
Jun 25, 9:58 PM EDT	Severe Thunderstorm Warning	JAX	Suwannee	29 min
Jun 25, 11:48 PM EDT	Special Weather Statement	JAX	Hamilton	42 min
Jun 26, 12:24 AM EDT	Special Weather Statement	JAX	Hamilton, Suwannee	51 min
Jun 26, 2:26 PM EDT	Special Weather Statement	JAX	Duval	49 min
Jun 26, 2:44 PM EDT	Areal Flood Advisory	JAX	Duval	58 min
Jun 26, 2:51 PM EDT	Special Weather Statement	JAX	Clay	39 min
Jun 26, 3:06 PM EDT	Special Weather Statement	JAX	Duval	39 min
Jun 26, 3:13 PM EDT	Areal Flood Advisory	JAX	Clay, Duval, Nassau, Saint Johns	92 min
Jun 26, 3:15 PM EDT	Severe Thunderstorm Warning	JAX	Clay, Duval, Saint Johns	45 min
Jun 26, 3:29 PM EDT	Special Weather Statement	JAX	Bradford	46 min
Jun 26, 3:41 PM EDT	Areal Flood Advisory	JAX	Duval, Nassau	80 min
Jun 26, 4:02 PM EDT	Areal Flood Advisory	JAX	Clay, Saint Johns	58 min
Jun 26, 4:14 PM EDT	Special Weather Statement	JAX	Putnam	46 min
Jun 26, 4:33 PM EDT	Areal Flood Advisory	JAX	Nassau	69 min
Jun 26, 4:36 PM EDT	Areal Flood Advisory	JAX	Putnam, Saint Johns	66 min
Jun 26, 4:59 PM EDT	Special Weather Statement	JAX	Marion	46 min
Jun 26, 5:35 PM EDT	Severe Thunderstorm Warning	JAX	Marion	25 min
Jun 26, 5:36 PM EDT	Special Weather Statement	JAX	Columbia	39 min
Jun 26, 5:45 PM EDT	Areal Flood Advisory	JAX	Marion	90 min
Jun 26, 5:48 PM EDT	Areal Flood Advisory	JAX	Alachua, Union	57 min
Jun 26, 6:20 PM EDT	Areal Flood Advisory	JAX	Hamilton, Suwannee	85 min
Jun 25, 8:07 PM EDT	Special Weather Statement	JAX	Appling	38 min
Jun 25, 8:08 PM EDT	Special Weather Statement	JAX	Jeff Davis	52 min
Jun 25, 8:34 PM EDT	Special Weather Statement	JAX	Coffee	41 min
Jun 25, 8:43 PM EDT	Special Weather Statement	JAX	Wayne	32 min
Jun 25, 8:58 PM EDT	Special Weather Statement	JAX	Jeff Davis	47 min
Jun 25, 9:21 PM EDT	Special Weather Statement	JAX	Pierce, Wayne	39 min
Jun 25, 9:37 PM EDT	Special Weather Statement	JAX	Bacon	38 min
Jun 25, 10:02 PM EDT	Special Weather Statement	JAX	Pierce	43 min
Jun 25, 10:19 PM EDT	Special Weather Statement	JAX	Ware	41 min
Jun 25, 10:43 PM EDT	Special Weather Statement	JAX	Pierce	32 min
Jun 25, 10:54 PM EDT	Special Weather Statement	JAX	Clinch, Echols, Ware	51 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2018 Every severe thunderstorm warning 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.