Alert archive / Florida / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 35, NWS Jacksonville, FL

April 25, 20154 counties in Florida

NWS Jacksonville, FL issued this severe thunderstorm warning at Apr 25, 2015, 2:28 PM EDT for 4 counties in Florida. It was in force for 47 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: Apr 25, 2015, 2:28 PM EDT (18:28 UTC)
Expired: Apr 25, 2015, 3:15 PM EDT
In force: 47 min
Issued by: NWS Jacksonville, FL
Area: Storm-based polygon

Counties Baker County, FL, Clay County, FL, Duval County, FL, Saint Johns County, FL

The radar

The Jacksonville radar (KJAX), 39 km from the middle of the area, began a volume at 18:29 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 25, 9:08 AM EDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Jacksonville, FL (KJAX), launched 12:00Z, 6.5 hours before the alert went out and 41 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1018 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 226 m²/s²
0-3 km storm-relative helicity: 316 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 Apr 25, 9:44 AM EDT, 4 hours 44 minutes earlier.

Area forecast discussion, Apr 25, 9:44 AM EDT, 4 hours 44 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE JACKSONVILLE FL
944 AM EDT SAT APR 25 2015

...TORNADO WATCH UNTIL 4 PM THIS AFTERNOON FOR INLAND SOUTHEAST
GEORGIA AND THE SUWANNEE VALLEY...

...STRONG TO ISOLATED SEVERE STORMS POSSIBLE FURTHER SOUTH AND
EAST TO THE I-10 CORRIDOR THIS AFTERNOON...

.UPDATE...
A WARM FRONT IS LIFTING NORTH ACROSS SOUTHEAST GEORGIA...WITH
A MID LEVEL SHORTWAVE APPROACHING FROM THE WEST. LIGHT SHOWER OR
SPRINKLES PREVAIL ACROSS SE GA THIS MORNING...WITH MORE ROBUST
ACTIVITY CLOSER TO THE SHORTWAVE ACROSS CENTRAL GA TO THE FL
PANHANDLE. THE 12Z KJAX SOUNDING IS NOT PARTICULARLY MOIST...BUT
WITH SW FLOW...THAT SHOULD INCREASE QUITE A BIT AS THE DAY
PROGRESSES. DEEP LAYER SHEAR WILL CONTINUE TO INCREASE AS THE
MID LEVEL SHORTWAVE ENTERS THE LOCAL AREA. WITH THE INGREDIENTS IN
PLACE FOR ROTATING STORMS...A TORNADO WATCH HAS BEEN ISSUED FOR
INLAND LOCATIONS UNTIL 4 PM. THIS WATCH MAY BE EXTENDED EAST AND
SOUTH IF CONDITIONS WARRANT. WILL KEEP SCATTERED TO NUMEROUS POPS
FOR MOST LOCATIONS THIS AFTN. VERY WARM CONDITIONS WILL PREVAIL
ACROSS NE FL WHERE STORMS WILL NOT ENTER/DEVELOP UNTIL LATER THIS
AFTERNOON...WITH UPPER 80S TO AROUND 90 INLAND. TEMPERATURES WILL
LIKELY NE HELD DOWN A BIT ACROSS SE GA WITH ADDITIONAL MORNING
CLOUDS AND AFTN TSTMS.

&&

.AVIATION...
VFR WILL PREVAIL INTO THIS AFTN. SCATTERED/NUMEROUS SHOWERS
AND STORMS WILL DEVELOP THIS AFTN...WITH PERIODS OF MVFR/LOCAL IFR
IN THE STRONGEST ACTIVITY. LOCAL WIND GUSTS TO 35 KT WILL BE
POSSIBLE IN/NEAR STORMS. OUTSIDE OF STORMS...SW WINDS 12-17 KT
WITH GUSTS TO 25 KT WILL BE POSSIBLE. ACTIVITY WILL LIKELY
LINGER INTO THE EARLY EVENING HOURS.

&&

.MARINE...
ELEVATED SW WINDS WILL PREVAIL TODAY...WITH SCEC OFFSHORE AND
15 KT NEARSHORE. STORMS WILL PUSH INTO THE WATERS LATER
TODAY...WITH A FEW STORMS CAPABLE OF PRODUCING WIND GUSTS TO 35
KT. WINDS WILL INCREASE TO SCA OFFSHORE TNGT.

RIP CURRENTS: MODERATE RISK TODAY...LOW RISK SUNDAY.

&&

.PRELIMINARY POINT TEMPS/POPS...
AMG  85  69  90  64 /  60  60  20  10
SSI  82  70  86  66 /  60  60  20  10
JAX  89  70  90  68 /  50  50  40  20
SGJ  86  71  89  70 /  40  30  40  30
GNV  87  72  88  71 /  30  30  40  30
OCF  88  70  87  70 /  20  30  30  40

&&

.JAX WATCHES/WARNINGS/ADVISORIES...
FL...NONE.
GA...NONE.
AM...SMALL CRAFT ADVISORY FROM 11 PM THIS EVENING TO 11 AM EDT SUNDAY
     FOR 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.

&&

ALLEN/HESS/GUILLET

Hazardous weather outlook, Apr 25, 1:20 PM EDT, 1 hour 8 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE JACKSONVILLE FL
120 PM EDT SAT APR 25 2015

AMZ450-452-454-470-472-474-FLZ020>025-030>033-035>038-040-124-125-
GAZ132>136-149>154-162>166-260930-
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-
120 PM EDT SAT APR 25 2015

...TORNADO WATCH FOR NORTHERN PORTIONS OF NORTHEAST FLORIDA
UNTIL 4 PM THIS AFTERNOON...

...MODERATE RISK OF RIP CURRENTS AT AREA BEACHES...

...SMALL CRAFT ADVISORY LATE THIS EVENING THROUGH SUNDAY MORNING
OFFSHORE...

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

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

A TORNADO WATCH IS IN EFFECT UNTIL 4 PM THIS AFTERNOON FOR NORTHERN
PORTIONS OF NORTHEAST FLORIDA.

A LINGERING LONG PERIOD OCEAN SWELL WILL KEEP A MODERATE RISK OF
RIP CURRENTS IN PLACE AT AREA BEACHES TODAY.

STRENGTHENING OFFSHORE WINDS LATE THIS EVENING WILL CREATE SMALL
CRAFT ADVISORY CONDITIONS FOR THE OFFSHORE COASTAL WATERS.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY...
SMALL CRAFT ADVISORY CONDITIONS WILL PERSIST IN THE OFFSHORE
COASTAL WATERS THROUGH SUNDAY MORNING.

SCATTERED AFTERNOON THUNDERSTORMS ARE EXPECTED TO DEVELOP ON
SUNDAY AFTERNOON...PRIMARILY IN NORTHEAST AND NORTH CENTRAL
FLORIDA. STRONG TO SEVERE THUNDERSTORMS WILL AGAIN BE
POSSIBLE...WITH DAMAGING WIND GUSTS...HAIL...AND FREQUENT
LIGHTNING STRIKES BEING THE PRIMARY THREATS.

A STRONG DISTURBANCE ALOFT WILL MIGRATE ACROSS THE SOUTHERN STATES
LATE TUESDAY THROUGH WEDNESDAY. ISOLATED AFTERNOON AND EVENING
THUNDERSTORMS ARE POSSIBLE ON MONDAY IN NORTHEAST FLORIDA AND
REGION-WIDE ON TUESDAY IN ADVANCE OF THIS SYSTEM. SCATTERED TO
NUMEROUS THUNDERSTORMS...POSSIBLY STRONG TO SEVERE...ARE POSSIBLE
WEDNESDAY AS LOW PRESSURE MOVES OVER OUR AREA.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS REQUESTED THIS AFTERNOON THROUGHOUT
SOUTHEAST GEORGIA. SPOTTER ACTIVATION MAY BE NEEDED THIS EVENING
AND SUNDAY AFTERNOON IN NORTHEAST AND NORTH CENTRAL FLORIDA.

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, Apr 25, 11:02 AM EDT, 3 hours 26 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
1102 AM EDT SAT APR 25 2015

GAZ133-135-251545-
JEFF DAVIS GA-APPLING GA-
1102 AM EDT SAT APR 25 2015

...SIGNIFICANT WEATHER ADVISORY FOR JEFF DAVIS AND APPLING COUNTIES
UNTIL 1145 AM EDT...

AT 1101 AM EDT...DOPPLER RADAR WAS TRACKING A LINE OF STRONG
THUNDERSTORMS ALONG A LINE EXTENDING FROM NEAR ALSTON TO 9 MILES
NORTHEAST OF JACKSONVILLE...AND MOVING SOUTHEAST AT 40 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...
BAXLEY...HAZLEHURST...GRAHAM...SURRENCY...PLANT HATCH AND PINE GROVE.

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

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THESE STORMS...AND MAY
LEAD TO FLOODING OF ROADWAYS AND LOW LYING AREAS. DO NOT DRIVE YOUR
VEHICLE THROUGH FLOODED ROADWAYS.

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 3194 8228 3190 8219 3191 8213 3186 8212
      3183 8206 3180 8211 3177 8209 3177 8213
      3171 8213 3160 8232 3166 8245 3171 8249
      3171 8252 3167 8252 3167 8257 3182 8284
      3192 8268 3196 8256 3195 8249 3197 8248
TIME...MOT...LOC 1501Z 294DEG 35KT 3209 8255 3191 8286

HESS

Special weather statement, Apr 25, 11:39 AM EDT, 2 hours 49 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
1139 AM EDT SAT APR 25 2015

GAZ135-136-251630-
WAYNE GA-APPLING GA-
1139 AM EDT SAT APR 25 2015

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN APPLING AND CENTRAL
WAYNE COUNTIES UNTIL 1230 PM EDT...

AT 1138 AM EDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 9
MILES NORTH OF SURRENCY...MOVING EAST AT 50 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...
JESUP...BAXLEY...GARDI...ODUM AND DOCTORTOWN.

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 TEMPORARY FLOODING OF ROADWAYS AND LOW LYING AREAS. DO NOT DRIVE
YOUR VEHICLE THROUGH FLOODED ROADWAYS.

&&

LAT...LON 3190 8219 3191 8213 3186 8212 3182 8202
      3179 8199 3179 8196 3167 8185 3165 8181
      3166 8181 3161 8177 3158 8170 3156 8170
      3154 8167 3148 8162 3144 8164 3184 8241
      3194 8229
TIME...MOT...LOC 1538Z 287DEG 43KT 3186 8218

HESS

Special weather statement, Apr 25, 12:24 PM EDT, 2 hours 4 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
1224 PM EDT SAT APR 25 2015

FLZ020-021-GAZ162-251715-
HAMILTON FL-SUWANNEE FL-ECHOLS GA-
1224 PM EDT SAT APR 25 2015

...SIGNIFICANT WEATHER ADVISORY FOR HAMILTON...NORTH CENTRAL SUWANNEE
AND SOUTHWESTERN ECHOLS COUNTIES UNTIL 115 PM EDT...

AT 1223 PM EDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM
NEAR MADISON...MOVING EAST AT 50 MPH.

GUSTY WINDS OF 45 TO 55 MPH CAN BE EXPECTED ALONG WITH POSSIBLE MINOR
DAMAGE. DOPPLER RADAR HAS INDICATED WEAK ROTATION WITHIN THIS STORM.
TORNADOES MAY DEVELOP WITH LITTLE OR NO ADVANCED WARNING.

LOCATIONS IMPACTED INCLUDE...
JASPER...JENNINGS...SUWANNEE SPRINGS...SUWANNEE RIVER STATE PARK...
BLUE SPRINGS AND CROSSROADS.

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 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

&&

LAT...LON 3063 8314 3067 8313 3075 8286 3037 8277
      3037 8319 3040 8318 3041 8318 3042 8322
      3046 8322 3047 8324 3052 8324 3055 8326
      3059 8326 3063 8328
TIME...MOT...LOC 1623Z 262DEG 45KT 3047 8332

GUILLET

Special weather statement, Apr 25, 2:18 PM EDT, 10 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
218 PM EDT SAT APR 25 2015

FLZ033-125-251900-
ST. JOHNS FL-COASTAL DUVAL FL-
218 PM EDT SAT APR 25 2015

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN DUVAL COUNTY UNTIL
300 PM EDT...

AT 218 PM EDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR
CRAIG FIELD...OR NEAR ARLINGTON...MOVING SOUTHEAST AT 55 MPH.

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

LOCATIONS IMPACTED INCLUDE...
JACKSONVILLE...PONTE VEDRA BEACH...UNF...ARLINGTON...NEPTUNE BEACH...
SAN PABLO...LITTLE TALBOT ISLAND...PALM VALLEY...FORT CAROLINE...
CRAIG FIELD...SAWGRASS AND TALLYRAND.

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 FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

&&

A TORNADO WATCH REMAINS IN EFFECT UNTIL 400 PM EDT FOR NORTHEASTERN
FLORIDA.

LAT...LON 3028 8162 3031 8165 3032 8168 3038 8167
      3054 8156 3054 8152 3047 8141 3041 8141
      3041 8143 3039 8145 3040 8147 3038 8148
      3037 8145 3040 8142 3040 8139 3031 8139
      3011 8134
TIME...MOT...LOC 1818Z 303DEG 46KT 3037 8155

PETERSON

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 25, 3:34 AM EDT	Small Craft Advisory	JAX		31 hr
Apr 25, 12:24 PM EDT	Special Weather Statement	JAX	Hamilton	51 min
Apr 25, 12:34 PM EDT	Tornado Warning	JAX	Hamilton, Suwannee	26 min
Apr 25, 1:00 PM EDT	Tornado Warning	JAX	Columbia, Hamilton, Suwannee	30 min
Apr 25, 1:29 PM EDT	Tornado Warning	JAX	Baker, Columbia	31 min
Apr 25, 1:57 PM EDT	Tornado Warning	JAX	Baker	33 min
Apr 25, 2:18 PM EDT	Special Weather Statement	JAX	Duval	42 min
Apr 25, 3:06 PM EDT	Tornado Warning	JAX	Clay, Duval, Saint Johns	24 min
Apr 25, 3:25 PM EDT	Special Weather Statement	JAX	Saint Johns	35 min
Apr 25, 3:29 PM EDT	Special Marine Warning	JAX		2 hr
Apr 25, 4:17 PM EDT	Severe Thunderstorm Warning	JAX	Hamilton	28 min
Apr 25, 4:34 PM EDT	Severe Thunderstorm Warning	JAX	Columbia, Hamilton	26 min
Apr 25, 4:53 PM EDT	Severe Thunderstorm Warning	JAX	Baker, Columbia	37 min
Apr 25, 5:29 PM EDT	Severe Thunderstorm Warning	JAX	Baker, Duval, Nassau	31 min
Apr 25, 6:00 PM EDT	Severe Thunderstorm Warning	JAX	Duval, Saint Johns	30 min
Apr 25, 6:03 PM EDT	Special Marine Warning	JAX		87 min
Apr 25, 9:23 AM EDT	River Flood Warning	JAX	Brantley	3 days
Apr 25, 11:02 AM EDT	Special Weather Statement	JAX	Appling, Jeff Davis	43 min
Apr 25, 11:39 AM EDT	Special Weather Statement	JAX	Wayne	51 min
Apr 25, 3:52 PM EDT	Special Weather Statement	JAX	Echols	23 min

Nearby

Severe Thunderstorm Warnings in Florida, 2015 Every 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.