Alert archive / Florida / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 195, NWS Jacksonville, FL

July 4, 2015Clay County, Florida

NWS Jacksonville, FL issued this severe thunderstorm warning at Jul 4, 2015, 1:48 PM EDT for Clay County, Florida. It was in force for 27 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jul 4, 2015, 1:48 PM EDT (17:48 UTC)
Expired
Jul 4, 2015, 2:15 PM EDT
In force
27 min
Issued by
NWS Jacksonville, FL
Area
Storm-based polygon

County Clay County, FL

The radar

The Jacksonville radar (KJAX), 58 km from the middle of the area, began a volume at 17:48 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

Cape Canaveral, FL (KXMR), launched 12:00Z, 5.8 hours before the alert went out and 214 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, Cape Canaveral, FL at 12:00Z on 2015-07-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 303 joules per kilogram.LCLLFCEL10008507005003002001001 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, Cape Canaveral, FL at 12:00Z on 2015-07-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -12 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
303 J/kg
Mixed-layer CIN
-97 J/kg
Mixed-layer LCL
1284 m above ground
0-6 km bulk shear
2 kt
0-1 km storm-relative helicity
-12 m²/s²
0-3 km storm-relative helicity
-8 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Jul 4, 9:03 AM EDT, 4 hours 45 minutes earlier.

Area forecast discussion, Jul 4, 9:03 AM EDT, 4 hours 45 minutes before
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Hazardous weather outlook, Jul 4, 4:56 AM EDT, 8 hours 52 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE JACKSONVILLE FL
456 AM EDT SAT JUL 4 2015

AMZ450-452-454-470-472-474-FLZ020>025-030>033-035>038-040-124-125-
GAZ132>136-149>154-162>166-050930-
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-
456 AM EDT SAT JUL 4 2015

...SCATTERED STORMS THIS AFTERNOON AND EVENING...
...MODERATE RISK FOR RIP CURRENTS NORTHEAST FLORIDA BEACHES...

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

.DAY ONE...TODAY AND TONIGHT...

SCATTERED THUNDERSTORMS ARE FORECAST THIS AFTERNOON AND EVENING
WITH SLIGHTLY HIGHER COVERAGE OF STORMS POSSIBLE ACROSS MARION...
PUTNAM...CLAY AND BRADFORD COUNTIES. LOCALLY GUSTY WINDS OF 40 TO
60 MPH AND FREQUENT LIGHTNING ARE THE MAIN HAZARDS WITH STRONGER
STORMS. STORMS WILL DECREASE IN COVERAGE BY LATE EVENING. STORM
CELL MOTION WILL BE NORTHEAST AT 15 MPH.

THERE IS A MODERATE RISK FOR RIP CURRENTS FOR NORTHEAST FLORIDA
BEACHES TODAY.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY...

SCATTERED TO NUMEROUS THUNDERSTORMS ARE FORECAST FOR SUNDAY THROUGH
MID WEEK MAINLY IN THE AFTERNOON AND EVENING HOURS. THE BEST CHANCES
WILL BE MAINLY OVER INLAND AREAS. A FEW STRONG TO BRIEFLY SEVERE
THUNDERSTORMS ARE POSSIBLE SUNDAY AND MONDAY AND CAPABLE OF PRODUCING
STRONG GUSTY WINDS UP TO 60 MPH...FREQUENT LIGHTNING STRIKES...AND
HEAVY DOWNPOURS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED.

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

In the hours before

Special weather statement, Jul 4, 11:50 AM EDT, 1 hour 58 minutes before
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Special weather statement, Jul 4, 12:41 PM EDT, 1 hour 7 minutes before
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Special weather statement, Jul 4, 12:47 PM EDT, 1 hour 1 minute before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
1247 PM EDT SAT JUL 4 2015

FLZ031-032-036-037-041730-
ALACHUA FL-BRADFORD FL-CLAY FL-PUTNAM FL-
1247 PM EDT SAT JUL 4 2015

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN PUTNAM...BRADFORD...
ALACHUA AND SOUTHWESTERN CLAY COUNTIES UNTIL 130 PM EDT...

AT 1246 PM EDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM
OVER GAINESVILLE...MOVING NORTHEAST AT 25 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...
GAINESVILLE...STARKE...INTERLACHEN...KEYSTONE HEIGHTS...MELROSE...
ALACHUA...HIGH SPRINGS...HAWTHORNE...ARCHER...MELROSE LANDING...LAKE
GENEVA...KINGSLEY...CROSS CREEK...UNIVERSITY OF FLORIDA...CAMP
BLANDING...ORANGE HEIGHTS...NEW RIVER...GAINESVILLE AIRPORT...SAMPSON
AND NEWNANS LAKE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...
REPORT DAMAGE TO THE NEAREST LAW ENFORCEMENT AGENCY OR YOUR COUNTY
EMERGENCY MANAGEMENT.

LAT...LON 2949 8222 2948 8248 2979 8265 3007 8203
      2986 8191 2951 8191 2951 8194 2950 8197
      2950 8200 2947 8220
TIME...MOT...LOC 1646Z 238DEG 20KT 2967 8237

ALLEN
Special weather statement, Jul 4, 1:31 PM EDT, 17 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
131 PM EDT SAT JUL 4 2015

FLZ031-032-041815-
BRADFORD FL-CLAY FL-
131 PM EDT SAT JUL 4 2015

...SIGNIFICANT WEATHER ADVISORY FOR EAST CENTRAL BRADFORD AND CLAY
COUNTIES UNTIL 215 PM EDT...

AT 130 PM EDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM OVER
KINGSLEY...OR NEAR STARKE...MOVING NORTHEAST AT 30 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...
ORANGE PARK...STARKE...KEYSTONE HEIGHTS...MIDDLEBURG...KINGSLEY...
OAKLEAF PLANTATION...CAMP BLANDING...DOCTORS INLET...FLEMING
ISLAND...SAMPSON...LAKESIDE...BELLAIR-MEADOWBROOK TERRACE...PENNEY
FARMS...LAWTEY...HAMPTON AND ASBURY LAKE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...
REPORT DAMAGE TO THE NEAREST LAW ENFORCEMENT AGENCY OR YOUR COUNTY
EMERGENCY MANAGEMENT.

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

&&

LAT...LON 2995 8180 2978 8199 2978 8208 2981 8212
      2983 8214 2984 8217 2989 8224 3019 8197
      3019 8175 3013 8168 3009 8168
TIME...MOT...LOC 1730Z 219DEG 24KT 2998 8202

ALLEN

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 4, 11:50 AM EDTSpecial Weather StatementJAXAlachua40 min
Jul 4, 12:41 PM EDTSpecial Weather StatementJAXAlachua49 min
Jul 4, 12:47 PM EDTSpecial Weather StatementJAXAlachua, Bradford43 min
Jul 4, 1:31 PM EDTSpecial Weather StatementJAXBradford, Clay44 min
Jul 4, 2:06 PM EDTSpecial Weather StatementJAXDuval39 min
Jul 4, 2:35 PM EDTSpecial Weather StatementJAXSaint Johns25 min
Jul 4, 3:08 PM EDTAreal Flood AdvisoryJAXDuval, Saint Johns82 min
Jul 4, 3:45 PM EDTSpecial Weather StatementJAXMarion30 min
Jul 4, 4:07 PM EDTSpecial Marine WarningJAX53 min
Jul 4, 4:11 PM EDTSevere Thunderstorm WarningJAXMarion49 min
Jul 4, 4:24 PM EDTSpecial Weather StatementJAXFlagler51 min
Jul 4, 4:45 PM EDTSpecial Weather StatementJAXMarion30 min
Jul 4, 5:07 PM EDTSpecial Weather StatementJAXHamilton38 min
Jul 4, 5:51 PM EDTSpecial Weather StatementJAXColumbia24 min
Jul 4, 3:21 PM EDTSpecial Weather StatementJAXCamden39 min
Jul 4, 3:41 PM EDTSpecial Weather StatementJAXCamden34 min
Jul 4, 4:06 PM EDTSevere Thunderstorm WarningJAXCamden, Glynn39 min
Jul 4, 4:15 PM EDTSpecial Weather StatementJAXClinch, Echols30 min
Jul 4, 4:21 PM EDTSpecial Weather StatementJAXAppling, Bacon54 min
Jul 4, 4:47 PM EDTSpecial Weather StatementJAXClinch28 min
Jul 4, 4:51 PM EDTSevere Thunderstorm WarningJAXClinch, Echols39 min
Jul 4, 5:05 PM EDTSpecial Weather StatementJAXPierce, Wayne40 min
Jul 4, 5:16 PM EDTSpecial Weather StatementJAXWare44 min
Jul 4, 5:45 PM EDTSpecial Weather StatementJAXBrantley, Charlton45 min

Nearby

Severe Thunderstorm Warnings in Florida, 2015Every severe thunderstorm warning 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.