Alert archive / Florida / Special Weather Statements in 2016

Special Weather Statement, NWS Jacksonville, FL

July 18, 2016Putnam County, Florida

NWS Jacksonville, FL issued this special weather statement at Jul 18, 2016, 1:21 PM EDT for Putnam County, Florida. It was in force for 24 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: Jul 18, 2016, 1:21 PM EDT (17:21 UTC)
Expired: Jul 18, 2016, 1:45 PM EDT
In force: 24 min
Issued by: NWS Jacksonville, FL

County Putnam County, FL

The radar

The Jacksonville radar (KJAX), 90 km from the middle of the area, began a volume at 17:24 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, 5.4 hours before the alert went out and 92 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: 2303 J/kg
Mixed-layer CIN: -19 J/kg
Mixed-layer LCL: 690 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: -23 m²/s²
0-3 km storm-relative helicity: -14 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

236 
WWUS82 KJAX 181721
SPSJAX

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
121 PM EDT MON JUL 18 2016
 
FLZ033-037-181745-
ST. JOHNS FL-PUTNAM FL-
121 PM EDT MON JUL 18 2016

...SIGNIFICANT WEATHER ADVISORY FOR SOUTH CENTRAL ST. JOHNS AND
NORTHEASTERN PUTNAM COUNTIES UNTIL 145 PM EDT...

AT 121 PM EDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM OVER
HASTINGS...MOVING WEST AT 20 MPH.

HAIL UP TO NICKEL SIZE IN DIAMETER AND GUSTY WINDS OF 45 TO 55 MPH
CAN BE EXPECTED ALONG WITH POSSIBLE MINOR DAMAGE.

LOCATIONS IMPACTED INCLUDE...
PALATKA...HASTINGS...EAST PALATKA...FEDERAL POINT...BARDIN...
SAN MATEO...ORANGE MILLS...BOSTWICK AND SPUDS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...
REPORT DAMAGE TO THE NEAREST LAW ENFORCEMENT AGENCY OR YOUR COUNTY
EMERGENCY MANAGEMENT.
 
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 2962 8143 2962 8152 2958 8152 2961 8181
      2984 8172 2984 8159 2974 8139
TIME...MOT...LOC 1721Z 107DEG 23KT 2968 8151 

$$

STRUBLE

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 18, 1:09 PM EDT	Special Weather Statement	JAX	Nassau	36 min
Jul 18, 1:16 PM EDT	Special Marine Warning	JAX		44 min
Jul 18, 1:18 PM EDT	Special Weather Statement	JAX	Putnam	42 min
Jul 18, 1:47 PM EDT	Special Weather Statement	JAX	Nassau	43 min
Jul 18, 1:49 PM EDT	Special Weather Statement	JAX	Putnam	26 min
Jul 18, 1:55 PM EDT	Special Weather Statement	JAX	Marion	35 min
Jul 18, 2:17 PM EDT	Special Weather Statement	JAX	Putnam	43 min
Jul 18, 3:12 PM EDT	Special Weather Statement	JAX	Clay	33 min
Jul 18, 3:56 PM EDT	Special Weather Statement	JAX	Bradford	34 min
Jul 18, 4:59 PM EDT	Special Weather Statement	JAX	Marion	31 min
Jul 18, 5:31 PM EDT	Special Weather Statement	JAX	Marion	29 min
Jul 18, 5:56 PM EDT	Special Weather Statement	JAX	Marion	34 min
Jul 18, 1:30 PM EDT	Special Weather Statement	JAX	Glynn	30 min
Jul 18, 2:05 PM EDT	Special Weather Statement	JAX	Wayne	25 min
Jul 18, 2:15 PM EDT	Special Weather Statement	JAX	Camden	45 min
Jul 18, 2:58 PM EDT	Special Weather Statement	JAX	Camden	32 min

Nearby

Special Weather Statements in Florida, 2016 Every special weather statement in 2016

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.