Alert archive / Florida / Special Weather Statements in 2018

Special Weather Statement, NWS Jacksonville, FL

August 9, 2018Duval County, Florida

NWS Jacksonville, FL issued this special weather statement at Aug 9, 2018, 4:01 PM EDT for Duval County, Florida. It was in force for 44 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, 4:01 PM EDT (20:01 UTC)
Expired: Aug 9, 2018, 4:45 PM EDT
In force: 44 min
Issued by: NWS Jacksonville, FL

County Duval County, FL

The radar

The Jacksonville radar (KJAX), 12 km from the middle of the area, began a volume at 20:04 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, 8.0 hours before the alert went out and 12 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, 9:57 AM EDT, 6 hours 4 minutes earlier.

Area forecast discussion, Aug 9, 9:57 AM EDT, 6 hours 4 minutes before

Area Forecast Discussion
National Weather Service Jacksonville FL
957 AM EDT Thu Aug 9 2018

.UPDATE...Similar conditions today compared to yesterday. Expect
storms to develop along the west coast seabreeze and then move
eastward across the area this afternoon. Low to mid level flow is
more westerly and a little stronger today which should keep the
east coast seabreeze near the coast. 12z upper air soundings and
GOES-16 Total Precipitable Water show PWATs of 1.6" across the
area which is still a little below average so scattered coverage
of storms expected again today. Hot and humid conditions will
persist as ridging remains across the se. Heat indices will reach
near 105 this afternoon.

&&

.AVIATION...VFR conditions this morning. Isolated to scattered
showers and thunderstorms will develop this afternoon. Will add
VCTS for ne Fl TAF sites mainly in 17z-22z time range.

&&

.MARINE...Westerly winds 10 to 15 knots today will become
southeast near the coast this aftenoon. Seas will be 1 to 3 feet.
Chance for storms reaching the coastal waters by late afternoon
and early evening.

Rip Currents: Low risk with offshore winds and flat surf.

&&

.PRELIMINARY POINT TEMPS/POPS...
AMG  93  74  91  74 /  30  20  30  20
SSI  93  77  91  76 /  20  20  30  20
JAX  94  75  93  74 /  40  20  30  20
SGJ  92  75  90  74 /  40  20  30  30
GNV  92  74  91  74 /  40  10  30  10
OCF  92  74  91  73 /  40  20  30  20

&&

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

Zibura/Cordero/Bricker

In the hours before

Special weather statement, Aug 9, 2:45 PM EDT, 1 hour 16 minutes before

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

FLZ024-GAZ150-152-164-091930-
Inland Nassau FL-Ware GA-Brantley GA-Charlton GA-
245 PM EDT THU AUG 9 2018

...SIGNIFICANT WEATHER ADVISORY FOR WESTERN NASSAU...SOUTHWESTERN
BRANTLEY...SOUTHEASTERN WARE AND NORTHERN CHARLTON COUNTIES UNTIL 330
PM EDT...

At 245 PM EDT, Doppler radar was tracking a strong thunderstorm over
Stephen Foster State Park, moving east at 20 mph.

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

Locations impacted include...
Stephen Foster State Park and Race Pond.

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 3108 8216 3069 8198 3067 8236 3080 8244
      3082 8243 3082 8245 3087 8248
TIME...MOT...LOC 1845Z 249DEG 19KT 3078 8235

23

Local storm report, Aug 9, 2:52 PM EDT, 1 hour 9 minutes before

PRELIMINARY LOCAL STORM REPORT
National Weather Service Jacksonville FL
252 PM EDT THU AUG 9 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0240 PM     TSTM WND GST     5 W EAST PALATKA        29.66N 81.69W
08/09/2018  M39 MPH          Putnam             FL   AWOS

            THUNDERSTORM WIND GUST OF 39 MPH MEASURED AT PALATKA
            AIRPORT.

&&

NMCGINN

Special weather statement, Aug 9, 3:02 PM EDT, 59 minutes before

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

FLZ032-033-037-038-133-138-091945-
Coastal Flagler FL-Coastal St. Johns FL-Putnam FL-Inland Flagler FL-
Clay FL-Inland St. Johns FL-
302 PM EDT THU AUG 9 2018

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN FLAGLER...ST.
JOHNS...NORTHEASTERN PUTNAM AND EAST CENTRAL CLAY COUNTIES UNTIL 345
PM EDT...

At 302 PM EDT, Doppler radar was tracking a strong thunderstorm over
Federal Point, or near Hastings, moving east at 30 mph.

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

Locations impacted include...
Saint Augustine, Hastings, East Palatka, World Golf Village, Saint
Augustine Beach, Marineland, Vilano Beach, Picolata, Federal Point
and South Ponte Vedra.

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 2958 8158 3005 8166 3009 8129 2962 8114
TIME...MOT...LOC 1902Z 252DEG 27KT 2978 8153

23

Special weather statement, Aug 9, 3:23 PM EDT, 38 minutes before

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

FLZ037-038-138-092015-
Coastal Flagler FL-Putnam FL-Inland Flagler FL-
323 PM EDT THU AUG 9 2018

...SIGNIFICANT WEATHER ADVISORY FOR FLAGLER AND SOUTHEASTERN PUTNAM
COUNTIES UNTIL 415 PM EDT...

At 323 PM EDT, Doppler radar was tracking a strong thunderstorm near
Andalusia, moving east at 15 mph.

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

Locations impacted include...
Palm Coast, Flagler Beach, Bunnell, Andalusia, Beverly Beach and
Espanola.

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 2946 8110 2946 8112 2943 8110 2942 8114
      2941 8115 2926 8115 2927 8142 2940 8142
      2940 8143 2938 8145 2937 8150 2958 8148
      2962 8113 2952 8110
TIME...MOT...LOC 1923Z 267DEG 13KT 2942 8142

23

Special weather statement, Aug 9, 3:30 PM EDT, 31 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, 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, 4:51 PM EDT	Special Weather Statement	JAX	Marion	39 min
Aug 9, 4:54 PM EDT	Special Marine Warning	JAX		19 min
Aug 9, 5:36 PM EDT	Special Weather Statement	JAX	Flagler, Putnam	39 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.