Alert archive / Florida / Special Weather Statements in 2015

Special Weather Statement, NWS Jacksonville, FL

August 7, 20155 counties in Florida

NWS Jacksonville, FL issued this special weather statement at Aug 7, 2015, 2:21 PM EDT for 5 counties in Florida. It was in force for 39 min. 3 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Aug 7, 2015, 2:21 PM EDT (18:21 UTC)
Expired: Aug 7, 2015, 3:00 PM EDT
In force: 39 min
Issued by: NWS Jacksonville, FL

Counties Alachua County, FL, Bradford County, FL, Clay County, FL, Saint Johns County, FL, Union County, FL

The radar

The Jacksonville radar (KJAX), 65 km from the middle of the area, began a volume at 18:21 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.

What was reported inside it

Time	Report	Where	Remark
Aug 7, 2:42 PM EDT	TSTM WND GST 57	4 E Green Cove Springs, FL
Aug 7, 3:00 PM EDT	TSTM WND DMG	S Picolata, FL	A LARGE TREE WAS TOPPLED BY STRONG THUNDERSTORM WINDS NEAR THE INTERSECTION OF COUNTY ROADS 13 AND 208. TIME OF DAMAGE BASED ON RADAR DATA.
Aug 7, 3:10 PM EDT	TSTM WND DMG	4 Sse Fruit Cove, FL	ST. JOHNS COUNTY 911/DISPATCH REPORTS A POWERLINE DOWNED BY THUNDERSTORM WIND GUSTS ALONG GREENBRIER ROAD. TIME OF DAMAGE BASED ON RADAR DATA.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Jacksonville, FL (KJAX), launched 12:00Z, 6.4 hours before the alert went out and 66 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: 1489 J/kg
Mixed-layer CIN: -20 J/kg
Mixed-layer LCL: 739 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 132 m²/s²
0-3 km storm-relative helicity: 125 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

910 
WWUS82 KJAX 071821
SPSJAX

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
221 PM EDT FRI AUG 7 2015
 
FLZ022-025-030>033-036-037-125-071900-
COASTAL DUVAL FL-ALACHUA FL-BRADFORD FL-INLAND DUVAL FL-CLAY FL-
ST. JOHNS FL-UNION FL-COLUMBIA FL-PUTNAM FL-
221 PM EDT FRI AUG 7 2015

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN UNION...BRADFORD...
CLAY...SOUTHEASTERN DUVAL...ST. JOHNS...SOUTHWESTERN COLUMBIA...
NORTHERN PUTNAM AND NORTHERN ALACHUA COUNTIES UNTIL 300 PM EDT...

AT 220 PM EDT...DOPPLER RADAR WAS TRACKING A LINE OF STRONG
THUNDERSTORMS ALONG A LINE EXTENDING FROM MANDARIN TO NEAR CAMP
BLANDING TO NEAR PROVIDENCE...AND MOVING SOUTHEAST AT 25 MPH.

GUSTY WINDS OF 45 TO 55 MPH CAN BE EXPECTED ALONG WITH POSSIBLE MINOR
WIND DAMAGE.

LOCATIONS IMPACTED INCLUDE...
JACKSONVILLE...GAINESVILLE...SAINT AUGUSTINE...ORANGE PARK...GREEN
COVE SPRINGS...STARKE...LAKE BUTLER...KEYSTONE HEIGHTS...HASTINGS...
RAIFORD...UNF...WORTHINGTON SPRING...MELROSE...MIDDLEBURG...PONTE
VEDRA BEACH...FRUIT COVE...MANDARIN...ALACHUA...NEPTUNE BEACH AND
WORLD GOLF VILLAGE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...
REPORT DAMAGE TO THE NEAREST LAW ENFORCEMENT AGENCY OR YOUR COUNTY
EMERGENCY MANAGEMENT.
 
FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THESE STORMS.
LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

THESE STORMS MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND
TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.

&&

LAT...LON 2986 8131 2985 8131 2970 8151 2967 8249
      2998 8274 3014 8197 3037 8140 2991 8129
      2993 8130 3000 8133 2997 8133 2992 8131
      2990 8131 2989 8129 2991 8128 2988 8127
TIME...MOT...LOC 1820Z 306DEG 23KT 3018 8163 2996 8192 2995 8261 

$$

NELSON

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 7, 3:42 AM EDT	Small Craft Advisory for Winds	JAX		26 hr
Aug 7, 1:27 PM EDT	Special Weather Statement	JAX	Hamilton	33 min
Aug 7, 1:34 PM EDT	Special Weather Statement	JAX	Nassau	26 min
Aug 7, 1:36 PM EDT	Special Marine Warning	JAX		54 min
Aug 7, 1:50 PM EDT	Severe Thunderstorm Warning	JAX	Baker, Columbia, Nassau	40 min
Aug 7, 1:57 PM EDT	Special Weather Statement	JAX	Bradford, Clay, Union	33 min
Aug 7, 2:11 PM EDT	Severe Thunderstorm Warning	JAX	Baker, Duval, Nassau	49 min
Aug 7, 2:14 PM EDT	Special Marine Warning	JAX		2 hr
Aug 7, 2:31 PM EDT	Special Weather Statement	JAX	Baker, Columbia	44 min
Aug 7, 2:39 PM EDT	Special Marine Warning	JAX		2 hr
Aug 7, 2:45 PM EDT	Severe Thunderstorm Warning	JAX	Baker, Columbia, Duval, Nassau	30 min
Aug 7, 2:49 PM EDT	Special Marine Warning	JAX		41 min
Aug 7, 2:54 PM EDT	Special Weather Statement	JAX	Alachua, Putnam	51 min
Aug 7, 2:56 PM EDT	Severe Thunderstorm Warning	JAX	Clay, Putnam, Saint Johns	34 min
Aug 7, 3:14 PM EDT	Severe Thunderstorm Warning	JAX	Baker, Bradford, Clay, Columbia, Duval, Nassau and 2 more	31 min
Aug 7, 3:20 PM EDT	Special Weather Statement	JAX	Columbia, Hamilton, Suwannee	40 min
Aug 7, 3:24 PM EDT	Severe Thunderstorm Warning	JAX	Saint Johns	36 min
Aug 7, 3:39 PM EDT	Severe Thunderstorm Warning	JAX	Hamilton	66 min
Aug 7, 3:41 PM EDT	Special Weather Statement	JAX	Clay	49 min
Aug 7, 3:43 PM EDT	Severe Thunderstorm Warning	JAX	Baker, Columbia, Union	21 min
Aug 7, 3:47 PM EDT	Special Weather Statement	JAX	Marion, Putnam	43 min
Aug 7, 4:02 PM EDT	Special Weather Statement	JAX	Columbia, Suwannee, Union	43 min
Aug 7, 4:11 PM EDT	Severe Thunderstorm Warning	JAX	Suwannee	34 min
Aug 7, 4:15 PM EDT	Special Weather Statement	JAX	Baker, Union	45 min
Aug 7, 4:18 PM EDT	Special Marine Warning	JAX		117 min
Aug 7, 4:18 PM EDT	Special Weather Statement	JAX	Hamilton	42 min
Aug 7, 4:32 PM EDT	Special Weather Statement	JAX	Saint Johns	28 min
Aug 7, 4:33 PM EDT	Severe Thunderstorm Warning	JAX	Columbia, Hamilton, Suwannee	57 min
Aug 7, 4:50 PM EDT	Severe Thunderstorm Warning	JAX	Suwannee	25 min
Aug 7, 4:52 PM EDT	Special Weather Statement	JAX	Baker	53 min
Aug 7, 4:54 PM EDT	Special Marine Warning	JAX		2 hr
Aug 7, 5:04 PM EDT	Severe Thunderstorm Warning	JAX	Baker, Bradford, Columbia, Union	56 min
Aug 7, 5:21 PM EDT	Severe Thunderstorm Warning	JAX	Suwannee	24 min
Aug 7, 5:23 PM EDT	Areal Flood Advisory	JAX	Suwannee	97 min
Aug 7, 5:31 PM EDT	Special Weather Statement	JAX	Bradford, Clay	59 min
Aug 7, 5:39 PM EDT	Severe Thunderstorm Warning	JAX	Alachua, Baker, Bradford, Clay, Putnam, Union	66 min
Aug 7, 5:41 PM EDT	Severe Thunderstorm Warning	JAX	Columbia, Gilchrist, Suwannee, Union	64 min
Aug 7, 5:42 PM EDT	Areal Flood Warning	JAX	Suwannee	2 hr
Aug 7, 6:08 PM EDT	Severe Thunderstorm Warning	JAX	Alachua, Columbia, Gilchrist, Suwannee, Union	67 min
Aug 7, 6:27 PM EDT	Special Weather Statement	JAX	Alachua, Marion, Putnam	63 min
Aug 7, 7:12 PM EDT	Special Weather Statement	JAX	Suwannee	63 min
Aug 7, 7:29 PM EDT	Special Weather Statement	JAX	Hamilton	46 min
Aug 7, 7:32 PM EDT	Special Weather Statement	JAX	Marion	58 min
Aug 7, 7:45 PM EDT	Areal Flood Advisory	JAX	Suwannee	90 min
Aug 7, 7:47 PM EDT	Severe Thunderstorm Warning	JAX	Columbia, Hamilton, Suwannee, Union	28 min
Aug 7, 2:38 PM EDT	Special Weather Statement	JAX	Camden	52 min
Aug 7, 2:53 PM EDT	Special Weather Statement	JAX	Charlton, Ware	52 min
Aug 7, 3:31 PM EDT	Special Weather Statement	JAX	Echols	44 min
Aug 7, 5:44 PM EDT	Special Weather Statement	JAX	Brantley	46 min

Nearby

Special Weather Statements in Florida, 2015 Every special weather statement in 2015

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.