Alert archive / Georgia / Special Weather Statements in 2021

Special Weather Statement, NWS Jacksonville, FL

October 7, 2021Clinch County, Georgia

NWS Jacksonville, FL issued this special weather statement at Oct 7, 2021, 5:03 PM EDT for Clinch County, Georgia. It was in force for 42 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: Oct 7, 2021, 5:03 PM EDT (21:03 UTC)
Expired: Oct 7, 2021, 5:45 PM EDT
In force: 42 min
Issued by: NWS Jacksonville, FL
Hail: 0.00 in
Wind: 40

County Clinch County, GA

The radar

The Moody AFB radar (KVAX), 37 km from the middle of the area, began a volume at 21:04 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, 9.1 hours before the alert went out and 128 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: 1952 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 586 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 10 m²/s²
0-3 km storm-relative helicity: 10 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 Oct 7, 5:01 PM EDT, 2 minutes earlier.

Area forecast discussion, Oct 7, 5:01 PM EDT, 2 minutes before

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In the hours before

Special weather statement, Oct 7, 4:10 PM EDT, 53 minutes before

Special Weather Statement
National Weather Service Jacksonville FL
410 PM EDT Thu Oct 7 2021

FLZ033-125-133-325-072100-
Coastal St. Johns FL-South Central Duval FL-Coastal Duval FL-
Inland St. Johns FL-
410 PM EDT Thu Oct 7 2021

...A thunderstorm will impact portions of northwestern St.
Johns and southeastern Duval Counties through 500 PM EDT...

At 410 PM EDT, Doppler radar was tracking a thunderstorm near
Bayard, or near Fruit Cove. This storm was nearly stationary.

HAZARD...Minor flooding due to heavy rainfall.

SOURCE...Radar indicated.

IMPACT...Minor flooding due to heavy rainfall is possible.

Locations impacted include...
Fruit Cove, Durbin, Bayard and Nocatee.

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.

&&

LAT...LON 3003 8143 2999 8165 3000 8166 3020 8161
      3022 8145
TIME...MOT...LOC 2010Z 355DEG 3KT 3010 8154

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...<30 MPH

CHANEY

Special weather statement, Oct 7, 4:55 PM EDT, 8 minutes before

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Special weather statement, Oct 7, 5:03 PM EDT, 0 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
Oct 7, 2:57 AM EDT	Dense Fog Advisory	JAX	Baker, Bradford, Clay, Duval, Nassau, Suwannee and 1 more	6 hr
Oct 7, 9:00 AM EDT	Dense Fog Advisory	JAX	Baker, Suwannee	60 min
Oct 7, 4:10 PM EDT	Special Weather Statement	JAX	Duval	50 min
Oct 7, 4:55 PM EDT	Special Weather Statement	JAX	Marion	50 min

Nearby

Special Weather Statements in Georgia, 2021 Every 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.