Alert archive / Florida / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 82, NWS Jacksonville, FL

June 6, 2014Nassau County, Florida

NWS Jacksonville, FL issued this severe thunderstorm warning at Jun 6, 2014, 7:34 PM EDT for Nassau County, Florida. It was in force for 26 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
Jun 6, 2014, 7:34 PM EDT (23:34 UTC)
Expired
Jun 6, 2014, 8:00 PM EDT
In force
26 min
Issued by
NWS Jacksonville, FL
Area
Storm-based polygon

County Nassau County, FL

The radar

The Jacksonville radar (KJAX), 16 km from the middle of the area, began a volume at 23:34 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, 11.6 hours before the alert went out and 14 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 12:00Z on 2014-06-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 116 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, Jacksonville, FL at 12:00Z on 2014-06-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -23 square meters per square second.193958Sfc1 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
116 J/kg
Mixed-layer CIN
-216 J/kg
Mixed-layer LCL
1426 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
-23 m²/s²
0-3 km storm-relative helicity
-39 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.7

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 Jun 6, 2:46 PM EDT, 4 hours 48 minutes earlier.

Area forecast discussion, Jun 6, 2:46 PM EDT, 4 hours 48 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE JACKSONVILLE FL
246 PM EDT FRI JUN 6 2014

.SHORT TERM...
THUNDERSTORM ACTIVITY SO FAR HAS BEEN SUPPRESSED BY MID LEVEL
RIDGING/SUBSIDENCE IN THE WAKE OF AN EARLY MORNING MCS THAT IS NOW
SEEN ON VISIBLE SATELLITE SWIRLING OFF THE COAST OF SC. THE
ATLANTIC SEABREEZE IS ACTUALLY MAKING A LITTLE MORE INLAND
PROGRESS IN NE FL THAN WE HAD ORIGINALLY ANTICIPATED...WHICH IS
MAINLY DUE TO SLIGHTLY LIGHTER WESTERLY SYNOPTIC WINDS AS WELL AS
THE HEAT GETTING OFF TO A QUICK START THIS MORNING. IN FACT...JAX
HAS ALREADY SOARED UP TO AS HIGH AS 94 SHORTLY AFTER THE NOON
HOUR.

SOME ISOLATED STORMS WILL TRY TO DEVELOP THIS AFTERNOON BUT THE
MAIN EVENT WILL ULTIMATELY HOLD OFF UNTIL MAINLY DURING THE EARLY
EVENING HOURS WHEN UPSTREAM SHORTWAVE ENERGY WILL MOVE INTO
SOUTHEAST GEORGIA AND INTERACT WITH A SURFACE TROUGH AND STRONG
ATMOSPHERIC INSTABILITY. CAPE VALUES ARE ALREADY HIGH AS MOST
AREAS ARE IN THE 90S WITH DEWPOINTS AROUND 70. SCATTERED TO
NUMEROUS STORMS WILL MOVE SOUTHEAST INTO OUR GEORGIA COUNTIES BY
SUNSET AND THIS ACTIVITY WILL SPREAD INTO NORTHERN FLORIDA THIS
EVENING. ACTIVITY ALONG THE I-95 CORRIDOR MAY BECOME ENHANCED THIS
EVENING AS THE GULF COAST SEABREEZE INTERACTS WITH THE ATLANTIC
SEABREEZE. THE SLIGHT RISK OF SEVERE STORMS REMAINS MOSTLY FOR
SOUTHEAST GEORGIA BUT A FEW STRONG TO SEVERE STORMS WILL ALSO BE
POSSIBLE ALONG THE I-10 CORRIDOR OF NE FL THIS EVENING. THE MAIN
THREAT WILL BE DAMAGING WINDS BUT ISOLATED LARGE HAIL WILL ALSO BE
POSSIBLE. THUNDERSTORM ACTIVITY WILL LINGER PAST MIDNIGHT TONIGHT
BEFORE FINALLY WINDING DOWN DURING THE EARLY MORNING HOURS.

.EXTENDED...

THE MESOSCALE CONVECTIVE SYSTEM...MCS...SETTING UP OVER NORTHWEST
GEORGIA WILL DIVE SOUTHEAST AROUND THE NORTHEASTERN EDGE OF THE
RIDGE. THIS CONVECTION SHOULD BE MOVING OFFSHORE OF COASTAL GEORGIA
TOMORROW MORNING WITH SOME SUBSIDENCE IN ITS WAKE. SO AFTER A STORMY
NIGHT FOR PORTIONS OF THE REGION SHOULD SEE SOME CLEARING MY MID
MORNING AND A SHORT BREAK IN THE STORMS. LOOKS LIKE YET ANOTHER MCS
WILL SET UP FOR TOMORROW AFTERNOON WILL ALSO DIVE SOUTHEASTWARD INTO
OUR GEORGIA-EXTREME NORTH FLORIDA PORTIONS OF THE FORECAST AREA FOR
THE EVENING HOURS. EXPECT THESE STORMS WILL CONTINUE MOST OF
SATURDAY NIGHT AND INTO SUNDAY MORNING OVER GEORGIA AND EXTREME
NORTH FLORIDA. AFTER THAT IT LOOKS LIKE MOST OF THE SYNOPTIC ACTION
SHIFTS BACK NORTH WITH AFTERNOON AND EARLY EVENING CONVECTION THE
RULE FOR THE BALANCE OF THE WEEK.

&&

.AVIATION...
PREVAILING VFR CONDITIONS WILL CONTINUE THROUGH MOST OF THE DAY.
THUNDERSTORMS WILL INCREASE THIS EVENING AND SOME OF THIS ACTIVITY
WILL LIKELY RESULT IN A PERIOD OF IFR CONDITIONS AND GUSTY WINDS
AT A FEW OF THE TERMINALS...ESPECIALLY ALONG AND NORTH OF THE I-10
CORRIDOR. LOCALLY HEAVY RAINFALL AND FREQUENT LIGHTNING CAN ALSO
BE EXPECTED WITH THE STRONGEST STORMS. STORMS WILL WIND DOWN AFTER
MIDNIGHT WITH PREVAILING CONDITIONS EXPECTED TO RETURN TO VFR.

&&

.MARINE...
PREVAILING CONDITIONS WILL REMAIN BELOW HEADLINE CRITERIA THROUGH
EARLY NEXT WEEK. THUNDERSTORM ACTIVITY WILL BE ON THE INCREASE
BEGINNING THIS EVENING WITH STORMS EXPECTED EACH DAY THROUGH NEXT
WEEK. A FEW OF THESE STORMS COULD BE STRONG WITH LOCALLY GUSTY
WINDS AND HIGHER SEAS.

RIP CURRENTS: LOW RISK TODAY AND SATURDAY.

&&

.PRELIMINARY POINT TEMPS/POPS...
AMG  71  92  71  92 /  60  60  60  50
SSI  73  89  75  86 /  50  50  50  30
JAX  72  91  70  90 /  50  60  60  50
SGJ  73  88  73  87 /  50  50  50  40
GNV  70  90  70  91 /  30  50  50  50
OCF  70  91  70  91 /  10  50  40  50

&&

.JAX WATCHES/WARNINGS/ADVISORIES...
FL...NONE.
GA...NONE.
AM...NONE.
&&

SHULER/SANDRIK/MCALLISTER
Hazardous weather outlook, Jun 6, 4:09 PM EDT, 3 hours 25 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE JACKSONVILLE FL
409 PM EDT FRI JUN 6 2014

AMZ450-452-454-470-472-474-FLZ020>025-030>033-035>038-040-
GAZ132>136-149>154-162>166-070800-
ALACHUA-
ALTAMAHA SOUND GA TO FERNANDINA BEACH FL 20 NM TO 60 NM OFFSHORE-
ALTAMAHA SOUND GA TO FERNANDINA BEACH FL OUT TO 20 NM-APPLING-
ATKINSON-BACON-BAKER-BRADFORD-BRANTLEY-CAMDEN (COASTAL)-
CAMDEN (INLAND)-CHARLTON-CLAY-CLINCH-COFFEE-COLUMBIA-DUVAL-ECHOLS-
FERNANDINA BEACH TO ST AUGUSTINE FL 20 NM TO 60 NM OFFSHORE-
FERNANDINA BEACH TO ST AUGUSTINE FL OUT TO 20 NM-FLAGLER-GILCHRIST-
GLYNN (COASTAL)-GLYNN (INLAND)-HAMILTON-JEFF DAVIS-MARION-NASSAU-
PIERCE-PUTNAM-
ST AUGUSTINE TO FLAGLER BEACH FL 20 NM TO 60 NM OFFSHORE-
ST AUGUSTINE TO FLAGLER BEACH FL OUT TO 20 NM-ST JOHNS-SUWANNEE-
UNION-WARE-WAYNE-
409 PM EDT FRI JUN 6 2014

...SLIGHT RISK OF SEVERE THUNDERSTORMS IN SOUTHEAST GEORGIA...

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

.DAY ONE...REST OF TODAY AND TONIGHT...

SCATTERED THUNDERSTORMS ARE EXPECTED LATE THIS AFTERNOON THROUGH
LATE THIS EVENING. THERE IS A SLIGHT RISK OF SEVERE STORMS OVER
SOUTHEAST GEORGIA WITH STRONG WINDS OF AROUND 60 MPH AND HAIL
POSSIBLE. A FEW STRONG STORMS WILL BE POSSIBLE OVER NORTHEAST
FLORIDA...PRODUCING GUSTY WINDS AND HEAVY DOWNPOURS.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY...

SCATTERED THUNDERSTORMS ARE EXPECTED EACH AFTERNOON AND EVENING. A
FEW OF THESE STORMS MAY BECOME STRONG PRODUCING GUSTY WINDS AND
HEAVY DOWNPOURS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED BY THIS EVENING. SPOTTERS SHOULD
MONITOR CONDITIONS AND BE ALERT FOR THE POSSIBILITY OF STRONG
TO LOCALLY SEVERE STORMS. PLEASE RELAY ANY STRONG OR SEVERE
WEATHER CONDITIONS TO THE NATIONAL WEATHER SERVICE OR YOUR
EMERGENCY MANAGEMENT OFFICIALS.

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, Jun 6, 6:19 PM EDT, 1 hour 15 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
619 PM EDT FRI JUN 6 2014

GAZ164-062300-
CHARLTON-
619 PM EDT FRI JUN 6 2014

...A SIGNIFICANT WEATHER ADVISORY HAS BEEN ISSUED FOR CHARLTON COUNTY
FOR STRONG WINDS...SMALL HAIL AND EXCESSIVE LIGHTNING VALID UNTIL 700
PM EDT...

AT 620 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM CENTERED 12 MILES NORTHWEST OF ST. GEORGE...
MOVING SOUTHEAST AT 10 MPH. THIS STRONG THUNDERSTORM WILL ALSO AFFECT
AREAS AROUND ST. GEORGE THROUGH 700 PM EDT. HAIL UP TO THREE QUARTER
INCH IN DIAMETER...EXCESSIVE CLOUD-TO-GROUND LIGHTNING AND GUSTY
WINDS OF 45 TO 55 MPH CAN BE EXPECTED ALONG WITH POSSIBLE MINOR
DAMAGE. IF FURTHER INTENSIFICATION OCCURS A WARNING MAY BE REQUIRED.

REPORT DAMAGE TO THE NEAREST LAW ENFORCEMENT AGENCY OR YOUR COUNTY
EMERGENCY MANAGEMENT.

LAT...LON 3054 8202 3047 8202 3060 8221 3077 8215
      3079 8216 3074 8204 3071 8204 3065 8205
      3057 8200
TIME...MOT...LOC 2220Z 302DEG 7KT 3067 8212

SANDRIK
Special weather statement, Jun 6, 6:27 PM EDT, 1 hour 7 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
627 PM EDT FRI JUN 6 2014

FLZ024-062315-
NASSAU-
627 PM EDT FRI JUN 6 2014

...A SIGNIFICANT WEATHER ADVISORY HAS BEEN ISSUED FOR NASSAU COUNTY
FOR STRONG WINDS AND SMALL HAIL VALID UNTIL 715 PM EDT...

AT 627 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM CENTERED 7 MILES WEST OF CALLAHAN...MOVING SOUTH
AT 5 MPH. THIS STRONG THUNDERSTORM WILL ALSO AFFECT AREAS AROUND
HILLIARD AND CALLAHAN THROUGH 715 PM EDT. HAIL UP TO THREE QUARTER
INCH IN DIAMETER AND GUSTY WINDS OF 45 TO 55 MPH CAN BE EXPECTED
ALONG WITH POSSIBLE MINOR DAMAGE.

REPORT DAMAGE TO THE NEAREST LAW ENFORCEMENT AGENCY OR YOUR COUNTY
EMERGENCY MANAGEMENT.

LAT...LON 3049 8183 3047 8202 3054 8202 3057 8200
      3063 8204 3070 8204 3071 8204 3070 8181
TIME...MOT...LOC 2227Z 350DEG 5KT 3056 8195

SHASHY
Special weather statement, Jun 6, 6:55 PM EDT, 39 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
655 PM EDT FRI JUN 6 2014

FLZ023-024-062345-
BAKER-NASSAU-
655 PM EDT FRI JUN 6 2014

...A SIGNIFICANT WEATHER ADVISORY HAS BEEN ISSUED FOR BAKER AND
SOUTHERN NASSAU COUNTIES FOR STRONG WINDS AND SMALL HAIL VALID UNTIL
745 PM EDT...

AT 655 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM CENTERED 2 MILES NORTHEAST OF SANDERSON...MOVING
EAST AT 10 MPH. THIS STRONG THUNDERSTORM WILL ALSO AFFECT AREAS
AROUND SANDERSON...GLEN SAINT MARY AND MACCLENNY THROUGH 745 PM EDT.
HAIL UP TO THREE QUARTER INCH IN DIAMETER AND GUSTY WINDS OF 40 TO 50
MPH CAN BE EXPECTED ALONG WITH POSSIBLE MINOR DAMAGE.

REPORT DAMAGE TO THE NEAREST LAW ENFORCEMENT AGENCY OR YOUR COUNTY
EMERGENCY MANAGEMENT.

LAT...LON 3028 8205 3021 8205 3015 8209 3022 8238
      3038 8230 3038 8218 3036 8217 3037 8211
      3036 8209 3036 8206 3037 8203 3037 8194
TIME...MOT...LOC 2255Z 292DEG 9KT 3027 8224

SHASHY
Special weather statement, Jun 6, 7:12 PM EDT, 22 minutes before
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Special weather statement, Jun 6, 7:17 PM EDT, 17 minutes before
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Local storm report, Jun 6, 7:18 PM EDT, 16 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jun 6, 4:43 PM EDTSpecial Weather StatementJAXClay47 min
Jun 6, 4:49 PM EDTSevere Thunderstorm WarningJAXClay41 min
Jun 6, 5:28 PM EDTSpecial Weather StatementJAXDuval47 min
Jun 6, 6:05 PM EDTSevere Thunderstorm WarningJAXBaker, Duval, Nassau40 min
Jun 6, 6:27 PM EDTSpecial Weather StatementJAXNassau48 min
Jun 6, 6:33 PM EDTSevere Thunderstorm WarningJAXDuval, Nassau42 min
Jun 6, 6:41 PM EDTAreal Flood AdvisoryJAXBaker, Duval, Nassau2 hr
Jun 6, 6:55 PM EDTSpecial Weather StatementJAXBaker50 min
Jun 6, 7:17 PM EDTSpecial Weather StatementJAXNassau43 min
Jun 6, 7:23 PM EDTSevere Thunderstorm WarningJAXBaker, Duval52 min
Jun 6, 7:49 PM EDTSpecial Marine WarningJAX116 min
Jun 6, 7:59 PM EDTSpecial Weather StatementJAXNassau31 min
Jun 6, 5:49 PM EDTSpecial Weather StatementJAXAppling, Jeff Davis26 min
Jun 6, 6:19 PM EDTSpecial Weather StatementJAXCharlton41 min
Jun 6, 7:12 PM EDTSpecial Weather StatementJAXJeff Davis48 min

Nearby

Severe Thunderstorm Warnings in Florida, 2014Every severe thunderstorm warning in 2014

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.