Alert archive / Florida / Special Weather Statements in 2018

Special Weather Statement, NWS Jacksonville, FL

August 9, 2018Flagler County, Putnam County, Florida

NWS Jacksonville, FL issued this special weather statement at Aug 9, 2018, 5:36 PM EDT for Flagler County, Putnam County, Florida. It was in force for 39 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 9, 2018, 5:36 PM EDT (21:36 UTC)
Expired: Aug 9, 2018, 6:15 PM EDT
In force: 39 min
Issued by: NWS Jacksonville, FL

Counties Flagler County, FL, Putnam County, FL

The radar

The Jacksonville radar (KJAX), 111 km from the middle of the area, began a volume at 21:38 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, 9.6 hours before the alert went out and 113 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: 1453 J/kg
Mixed-layer CIN: -51 J/kg
Mixed-layer LCL: 952 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: -46 m²/s²
0-3 km storm-relative helicity: -35 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 9, 4:24 PM EDT, 1 hour 12 minutes earlier.

Area forecast discussion, Aug 9, 4:24 PM EDT, 1 hour 12 minutes before

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In the hours before

Special weather statement, Aug 9, 3:30 PM EDT, 2 hours 6 minutes before

Special Weather Statement
National Weather Service Jacksonville FL
330 PM EDT THU AUG 9 2018

FLZ025-033-125-133-092015-
Coastal St. Johns FL-Inland Duval FL-Coastal Duval FL-
Inland St. Johns FL-
330 PM EDT THU AUG 9 2018

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN ST. JOHNS AND
SOUTHEASTERN DUVAL COUNTIES UNTIL 415 PM EDT...

At 330 PM EDT, Doppler radar was tracking a strong thunderstorm over
Nas Jax, or near Mandarin, moving east at 15 mph.

Wind gusts of 45 to 55 mph can be expected along with possible minor
wind damage.

Locations impacted include...
Unf, Mandarin, Fruit Cove, Ponte Vedra Beach, Neptune Beach,
Sawgrass, Baymeadows, Ortega, San Pablo and Craig Field.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 3008 8164 3018 8168 3019 8168 3019 8169
      3028 8173 3041 8139 3026 8134 3024 8134
      3015 8131
TIME...MOT...LOC 1930Z 267DEG 13KT 3021 8164

23

Special weather statement, Aug 9, 4:01 PM EDT, 1 hour 35 minutes before

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Local storm report, Aug 9, 4:12 PM EDT, 1 hour 24 minutes before

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Local storm report, Aug 9, 4:15 PM EDT, 1 hour 21 minutes before

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Special weather statement, Aug 9, 4:51 PM EDT, 45 minutes before

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Special weather statement, Aug 9, 5:36 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
Aug 9, 2:11 PM EDT	Special Weather Statement	JAX	Putnam	49 min
Aug 9, 2:35 PM EDT	Special Marine Warning	JAX		55 min
Aug 9, 2:53 PM EDT	Special Marine Warning	JAX		67 min
Aug 9, 3:02 PM EDT	Special Weather Statement	JAX	Saint Johns	43 min
Aug 9, 3:07 PM EDT	Severe Thunderstorm Warning	JAX	Clay, Saint Johns	38 min
Aug 9, 3:12 PM EDT	Special Marine Warning	JAX		63 min
Aug 9, 3:21 PM EDT	Special Marine Warning	JAX		54 min
Aug 9, 3:23 PM EDT	Special Weather Statement	JAX	Flagler	52 min
Aug 9, 3:30 PM EDT	Special Weather Statement	JAX	Duval	45 min
Aug 9, 3:54 PM EDT	Special Marine Warning	JAX		66 min
Aug 9, 3:59 PM EDT	Special Marine Warning	JAX		61 min
Aug 9, 4:01 PM EDT	Special Weather Statement	JAX	Duval	44 min
Aug 9, 4:51 PM EDT	Special Weather Statement	JAX	Marion	39 min
Aug 9, 4:54 PM EDT	Special Marine Warning	JAX		19 min
Aug 9, 2:19 PM EDT	Special Weather Statement	JAX	Charlton	41 min
Aug 9, 2:45 PM EDT	Special Weather Statement	JAX	Charlton	45 min
Aug 9, 5:38 PM EDT	Special Weather Statement	JAX	Bacon	52 min

Nearby

Special Weather Statements in Florida, 2018 Every 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.