Alert archive / Florida / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 28, NWS Jacksonville, FL

April 15, 2014Marion County, Florida

NWS Jacksonville, FL issued this severe thunderstorm warning at Apr 15, 2014, 12:48 PM EDT for Marion County, Florida. It was in force for 42 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 15, 2014, 12:48 PM EDT (16:48 UTC)
Expired
Apr 15, 2014, 1:30 PM EDT
In force
42 min
Issued by
NWS Jacksonville, FL
Area
Storm-based polygon

County Marion County, FL

The radar

The Jacksonville radar (KJAX), 146 km from the middle of the area, began a volume at 16:48 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, 4.8 hours before the alert went out and 173 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 2014-04-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2014-04-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 40 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1017 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
40 m²/s²
0-3 km storm-relative helicity
50 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 15, 3:43 AM EDTLake Wind AdvisoryJAXBradford, Flagler, Gilchrist14 hr
Apr 15, 11:49 AM EDTSpecial Weather StatementJAXMarion41 min
Apr 15, 12:24 PM EDTSpecial Weather StatementJAXMarion51 min
Apr 15, 3:04 PM EDTSpecial Marine WarningJAX41 min
Apr 15, 3:15 PM EDTSpecial Marine WarningJAX2 hr
Apr 15, 3:57 PM EDTSpecial Marine WarningJAX2 hr
Apr 15, 6:28 PM EDTLake Wind AdvisoryJAXBaker, Bradford, Nassau, Suwannee, Union3 hr
Apr 15, 7:05 AM EDTSpecial Weather StatementJAXClinch, Echols40 min
Apr 15, 7:38 AM EDTSpecial Weather StatementJAXCharlton, Clinch, Ware52 min
Apr 15, 3:08 PM EDTSpecial Weather StatementJAXCamden, Glynn37 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.