Alert archive / Florida / Special Weather Statements in 2016

Special Weather Statement, NWS Jacksonville, FL

September 13, 2016Nassau County, Florida

NWS Jacksonville, FL issued this special weather statement at Sep 13, 2016, 8:21 PM EDT for Nassau County, Florida. It was in force for 54 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
Sep 13, 2016, 8:21 PM EDT (00:21 UTC)
Expired
Sep 13, 2016, 9:15 PM EDT
In force
54 min
Issued by
NWS Jacksonville, FL

County Nassau County, FL

The radar

The Jacksonville radar (KJAX), 21 km from the middle of the area, began a volume at 00:24 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 00:00Z, 0.4 hours before the alert went out and 20 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-pSkew-T log-p diagram, Jacksonville, FL at 00:00Z on 2016-09-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 603 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Jacksonville, FL at 00:00Z on 2016-09-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -61 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
603 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
584 m above ground
0-6 km bulk shear
8 kt
0-1 km storm-relative helicity
-61 m²/s²
0-3 km storm-relative helicity
-39 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 Sep 13, 3:59 PM EDT, 4 hours 22 minutes earlier.

Area forecast discussion, Sep 13, 3:59 PM EDT, 4 hours 22 minutes before
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Hazardous weather outlook, Sep 13, 7:45 PM EDT, 36 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE JACKSONVILLE FL
745 PM EDT TUE SEP 13 2016

AMZ450-452-454-470-472-474-FLZ020>025-030>033-035>038-040-124-125-
GAZ132>136-149>154-162>166-141130-
COASTAL WATERS FROM ALTAMAHA SOUND TO FERNANDINA BEACH FL OUT
20 NM-
COASTAL WATERS FROM FERNANDINA BEACH TO ST. AUGUSTINE FL OUT
20 NM-
COASTAL WATERS FROM ST. AUGUSTINE TO FLAGLER BEACH FL OUT 20 NM-
WATERS FROM ALTAMAHA SOUND GA TO FERNANDINA BEACH FL FROM 20 TO
60 NM-
WATERS FROM FERNANDINA BEACH TO ST. AUGUSTINE FL FROM 20 TO 60 NM-
WATERS FROM ST. AUGUSTINE TO FLAGLER BEACH FL FROM 20 TO 60 NM-
HAMILTON-SUWANNEE-COLUMBIA-BAKER-INLAND NASSAU-INLAND DUVAL-UNION-
BRADFORD-CLAY-ST. JOHNS-GILCHRIST-ALACHUA-PUTNAM-FLAGLER-MARION-
COASTAL NASSAU-COASTAL DUVAL-COFFEE-JEFF DAVIS-BACON-APPLING-
WAYNE-ATKINSON-WARE-PIERCE-BRANTLEY-INLAND GLYNN-COASTAL GLYNN-
ECHOLS-CLINCH-CHARLTON-INLAND CAMDEN-COASTAL CAMDEN-
745 PM EDT TUE SEP 13 2016

...LOCALLY HEAVY RAIN ESPECIALLY NEAR THE COAST...
...FLOOD WATCH IN EFFECT FOR COASTAL SOUTHEAST GEORGIA...
...HIGH RISK OF RIP CURRENTS AND HIGH SURF ADVISORY...
...WIND ADVISORY ALONG COASTAL AREAS TONIGHT...
...GALE WARNING IN EFFECT FOR THE COASTAL WATERS...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST FLORIDA...
SOUTHEAST GEORGIA AND THE ADJACENT COASTAL WATERS.

.DAY ONE...TONIGHT...

A TROPICAL LOW WILL TRACK ACROSS THE NORTH FLORIDA PENINSULA
THROUGH TONIGHT AND BE ACROSS THE SOUTHEAST GEORGIA TONIGHT. RAIN
BANDS WILL ROTATE TO THE WEST AND NORTHWEST THE REGION THROUGH
TONIGHT. A FEW STRONG STORMS ARE POSSIBLE WITH THESE BANDS WHICH
MAY ALSO PRODUCE BRIEF WATER SPOUTS AND TORNADOES.

INTENSE RAINFALL RATES ARE EXPECTED INTO TONIGHT WITH RAINFALL
AMOUNTS OF 3 TO 6 INCHES POSSIBLE ALONG THE COAST WITH LESSER
AMOUNTS INLAND. HEAVY RAIN IN A SHORT PERIOD OF TIME MAY LEAD TO
TEMPORARY FLOODING OF URBAN AREAS AS WELL AS LOW LYING AND POOR
DRAINAGE AREAS. FLOOD WATCH IS IN EFFECT FOR COASTAL SOUTHEAST
GEORGIA.

ALONG THE IMMEDIATE COASTAL AREAS...WINDY CONDITIONS ARE EXPECTED.
SUSTAINED WINDS AROUND 25 TO 35 MPH WITH GUSTS AROUND 45 MPH ARE
EXPECTED. LOCALLY HIGHER GUSTS POSSIBLE IN SOME OF THE HEAVIER
RAIN BANDS.

THE RISK FOR RIP CURRENTS WILL BE HIGH INTO WEDNESDAY DUE TO THE
STRONG ONSHORE FLOW AND BUILDING SEAS WITH BREAKERS BECOMING
UP TO 5 TO 8 FEET. A GALE WARNING IS IN EFFECT FOR THE COASTAL
WATERS THROUGH WEDNESDAY MORNING.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY...

NUMEROUS TO WIDESPREAD SHOWERS WITH SCATTERED STORMS ARE EXPECTED
ON WEDNESDAY WITH LOCALLY HEAVIER AMOUNTS OF OVER 2 INCHES POSSIBLE.

SCATTERED TO NUMEROUS SHOWERS AND STORMS ARE EXPECTED EACH AFTERNOON
AND EVENING FOR THE REMAINDER OF THE PERIOD WITH LOCALLY HEAVY RAIN
AND FREQUENT LIGHTNING POSSIBLE IN THE STRONGER STORMS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED. HOWEVER, INDIVIDUAL
SPOTTERS ARE ENCOURAGED TO REPORT HIGH WIND AND FLOODING TO THE
NATIONAL WEATHER SERVICE FORECAST OFFICE.

FOR ADDITIONAL INFORMATION...VISIT THE NATIONAL WEATHER SERVICE
IN JACKSONVILLE WEBSITE ON THE INTERNET AT WEATHER.GOV/JAX.

In the hours before

Local storm report, Sep 13, 7:15 PM EDT, 1 hour 6 minutes before
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Special weather statement, Sep 13, 7:23 PM EDT, 58 minutes before
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Local storm report, Sep 13, 7:50 PM EDT, 31 minutes before
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Local storm report, Sep 13, 8:00 PM EDT, 21 minutes before
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Special weather statement, Sep 13, 8:07 PM EDT, 14 minutes before
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Special weather statement, Sep 13, 8:21 PM EDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Sep 13, 8:07 PM EDTSpecial Weather StatementJAXDuval38 min
Sep 13, 8:36 PM EDTSpecial Weather StatementJAXDuval54 min
Sep 13, 8:43 PM EDTAreal Flood AdvisoryJAXDuval, Saint Johns3 hr
Sep 13, 9:23 PM EDTSpecial Weather StatementJAXDuval67 min
Sep 13, 9:29 PM EDTAreal Flood WarningJAXDuval, Saint Johns3 hr
Sep 13, 9:29 PM EDTSevere Thunderstorm WarningJAXDuval46 min
Sep 13, 10:05 PM EDTSpecial Weather StatementJAXDuval55 min
Sep 13, 10:15 PM EDTSevere Thunderstorm WarningJAXDuval, Nassau45 min
Sep 13, 10:34 PM EDTSmall Craft AdvisoryJAX10 hr
Sep 13, 10:34 PM EDTTropical Storm WarningJAXDuval, Nassau12 hr
Sep 14, 2:50 AM EDTSpecial Marine WarningJAX55 min
Sep 14, 4:04 AM EDTSpecial Marine WarningJAX56 min
Sep 14, 5:01 AM EDTSpecial Marine WarningJAX29 min
Sep 14, 6:54 AM EDTRip Current StatementJAXDuval, Flagler, Nassau11 hr
Sep 14, 8:31 AM EDTSmall Craft AdvisoryJAX10 hr
Sep 14, 12:26 PM EDTSpecial Weather StatementJAXMarion49 min
Sep 14, 1:07 PM EDTSpecial Weather StatementJAXSaint Johns38 min
Sep 13, 8:18 PM EDTAreal Flood WarningJAXGlynn3 hr
Sep 13, 8:27 PM EDTSpecial Weather StatementJAXBrantley, Glynn63 min
Sep 13, 9:08 PM EDTAreal Flood WarningJAXGlynn2 hr
Sep 14, 1:59 AM EDTAreal Flood AdvisoryJAXCamden, Glynn2 hr
Sep 14, 4:08 AM EDTAreal Flood AdvisoryJAXGlynn97 min
Sep 14, 5:09 AM EDTAreal Flood WarningJAXGlynn96 min

Nearby

Special Weather Statements in Florida, 2016Every 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.