Alert archive / Florida / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 216, NWS Jacksonville, FL

October 14, 2014Flagler County, Saint Johns County, Florida

NWS Jacksonville, FL issued this severe thunderstorm warning at Oct 14, 2014, 7:15 PM EDT for Flagler County, Saint Johns County, Florida. It was in force for 30 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
Oct 14, 2014, 7:15 PM EDT (23:15 UTC)
Expired
Oct 14, 2014, 7:45 PM EDT
In force
30 min
Issued by
NWS Jacksonville, FL
Area
Storm-based polygon

Counties Flagler County, FL, Saint Johns County, FL

The radar

The Jacksonville radar (KJAX), 94 km from the middle of the area, began a volume at 23:17 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, 11.3 hours before the alert went out and 96 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 2014-10-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 130 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 2014-10-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 34 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
130 J/kg
Mixed-layer CIN
-87 J/kg
Mixed-layer LCL
1066 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
34 m²/s²
0-3 km storm-relative helicity
81 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 Oct 14, 1:40 PM EDT, 5 hours 35 minutes earlier.

Area forecast discussion, Oct 14, 1:40 PM EDT, 5 hours 35 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE JACKSONVILLE FL
140 PM EDT TUE OCT 14 2014

.MARINE...

UPDATED TO SMALL CRAFT INNER BASED ON RECENT OBSERVATIONS. THE
INCREASED PRESSURE GRADIENT ASSOCIATED WITH APPROACHING FRONT IS
EXPECTED TO KEEP WINDS ELEVATED.

&&

.PRELIMINARY POINT TEMPS/POPS...
AMG  62  75  55  75 /  80  10   0   0
SSI  67  77  60  74 /  80  20   0   0
JAX  67  79  57  77 /  80  30   0   0
SGJ  69  80  60  77 /  80  80  10   0
GNV  66  78  57  78 /  80  30   0   0
OCF  68  80  58  79 /  80  70   0   0

&&

.JAX WATCHES/WARNINGS/ADVISORIES...
FL...NONE.
GA...NONE.
AM...SMALL CRAFT ADVISORY UNTIL 10 AM EDT WEDNESDAY FOR ALTAMAHA
     SOUND GA TO FERNANDINA BEACH FL 20 NM TO 60 NM OFFSHORE-
     ALTAMAHA SOUND GA TO FERNANDINA BEACH FL OUT 20 NM-
     FERNANDINA BEACH TO ST AUGUSTINE FL 20 NM TO 60 NM OFFSHORE-
     FERNANDINA BEACH TO ST AUGUSTINE FL OUT 20 NM-ST AUGUSTINE
     TO FLAGLER BEACH FL 20 NM TO 60 NM OFFSHORE-ST AUGUSTINE TO
     FLAGLER BEACH FL OUT 20 NM.

&&

STRUBLE
Hazardous weather outlook, Oct 14, 7:14 PM EDT, 1 minute before
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In the hours before

Special weather statement, Oct 14, 5:11 PM EDT, 2 hours 4 minutes before
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Special weather statement, Oct 14, 5:24 PM EDT, 1 hour 51 minutes before
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Special weather statement, Oct 14, 5:55 PM EDT, 1 hour 20 minutes before
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Special weather statement, Oct 14, 6:12 PM EDT, 1 hour 3 minutes before
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Special weather statement, Oct 14, 6:29 PM EDT, 46 minutes before
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Special weather statement, Oct 14, 6:49 PM EDT, 26 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Oct 14, 1:00 PM EDTSpecial Weather StatementJAXHamilton, Suwannee30 min
Oct 14, 1:31 PM EDTSevere Thunderstorm WarningJAXHamilton, Suwannee29 min
Oct 14, 1:54 PM EDTSpecial Weather StatementJAXColumbia36 min
Oct 14, 2:21 PM EDTSpecial Weather StatementJAXAlachua, Baker, Bradford, Columbia, Gilchrist, Union39 min
Oct 14, 2:38 PM EDTSpecial Weather StatementJAXClay, Putnam52 min
Oct 14, 2:42 PM EDTSpecial Weather StatementJAXNassau33 min
Oct 14, 2:50 PM EDTSevere Thunderstorm WarningJAXBaker28 min
Oct 14, 3:05 PM EDTSevere Thunderstorm WarningJAXNassau25 min
Oct 14, 3:13 PM EDTSpecial Marine WarningJAX2 hr
Oct 14, 3:19 PM EDTSevere Thunderstorm WarningJAXClay, Duval, Nassau41 min
Oct 14, 3:28 PM EDTSevere Thunderstorm WarningJAXDuval, Nassau47 min
Oct 14, 3:59 PM EDTSpecial Weather StatementJAXDuval46 min
Oct 14, 5:11 PM EDTSpecial Weather StatementJAXMarion49 min
Oct 14, 5:14 PM EDTSpecial Marine WarningJAX91 min
Oct 14, 5:19 PM EDTAreal Flood AdvisoryJAXFlagler, Saint Johns86 min
Oct 14, 5:24 PM EDTSpecial Weather StatementJAXSaint Johns51 min
Oct 14, 5:55 PM EDTSpecial Weather StatementJAXMarion35 min
Oct 14, 6:12 PM EDTSpecial Weather StatementJAXSaint Johns48 min
Oct 14, 6:29 PM EDTSpecial Weather StatementJAXMarion46 min
Oct 14, 6:42 PM EDTSpecial Marine WarningJAX63 min
Oct 14, 6:49 PM EDTSpecial Weather StatementJAXFlagler41 min
Oct 14, 7:07 PM EDTSpecial Marine WarningJAX83 min
Oct 14, 7:45 PM EDTAreal Flood AdvisoryJAXFlagler, Saint Johns90 min
Oct 14, 1:14 PM EDTSpecial Weather StatementJAXLanier46 min
Oct 14, 1:52 PM EDTSevere Thunderstorm WarningJAXClinch, Echols, Ware38 min
Oct 14, 2:00 PM EDTSpecial Weather StatementJAXBacon45 min
Oct 14, 2:11 PM EDTSevere Thunderstorm WarningJAXBrantley, Pierce, Ware49 min
Oct 14, 2:42 PM EDTSevere Thunderstorm WarningJAXAppling, Bacon, Ware48 min
Oct 14, 2:44 PM EDTSpecial Weather StatementJAXWayne31 min
Oct 14, 3:02 PM EDTSpecial Weather StatementJAXBrantley, Charlton, Pierce, Wayne43 min
Oct 14, 3:09 PM EDTSevere Thunderstorm WarningJAXWayne21 min
Oct 14, 3:26 PM EDTSevere Thunderstorm WarningJAXAppling, Brantley, Camden, Charlton, Glynn, Pierce and 1 more64 min
Oct 14, 4:34 PM EDTSpecial Weather StatementJAXGlynn26 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.