Alert archive / Florida / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 95, NWS Jacksonville, FL

July 3, 2019Alachua County, Columbia County, Florida

NWS Jacksonville, FL issued this severe thunderstorm warning at Jul 3, 2019, 5:58 PM EDT for Alachua County, Columbia County, 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
Jul 3, 2019, 5:58 PM EDT (21:58 UTC)
Expired
Jul 3, 2019, 6:45 PM EDT
In force
47 min
Issued by
NWS Jacksonville, FL
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Alachua County, FL, Columbia County, FL

The radar

The Jacksonville radar (KJAX), 96 km from the middle of the area, began a volume at 22:01 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, 10.0 hours before the alert went out and 97 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 2019-07-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1727 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 2019-07-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -22 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
1727 J/kg
Mixed-layer CIN
-93 J/kg
Mixed-layer LCL
1292 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
-22 m²/s²
0-3 km storm-relative helicity
5 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 3, 10:08 AM EDT, 7 hours 50 minutes earlier.

Area forecast discussion, Jul 3, 10:08 AM EDT, 7 hours 50 minutes before
Area Forecast Discussion
National Weather Service Jacksonville FL
1008 AM EDT Wed Jul 3 2019

...HEAT ADVISORY REMAINS IN EFFECT FROM 11 AM THIS MORNING TO
6 PM EDT THIS EVENING...

.UPDATE...
Just some middle to high level cloudiness this morning will be
replaced by scattered cumulus cloud streets through the early
afternoon. With sinking air locally low level cloudiness will be
somewhat suppressed allowing for high temperatures approaching
the century mark and heat index values up to 110F. Any time we get
temperatures that high with high relative humidity a few storms
will blow through the inversion/sinking air and expect that to
happen along the east coast Sea Breeze front between 2 and 8 p.m. The
sea breeze will most likely set up near the St Johns River south
of Downtown and along I-95 north of Downtown. That said it
shouldn't get west of Trail Ridge before the cells fall apart. Some
of those storms will be strong and with weak steering currents
they will move slowly allowing for locally heavy rainfall.

THEN...Later this afternoon and this evening the West Coast Sea
Breeze will become active between 6 p.m. and 10 p.m. in the
vicinity of I-75 and will drift eastward. Same issues as before
with a few strong storms and locally heavy downpours in the areas
were storms move slowly.

&&

.AVIATION...
Just a scattered to broken mid layer and broken-overcast cirrus
this morning. Expect a cumulus layer to develop at 3-4 KFT between
14 to 18 utc. Sea breeze shower/TSTM development should begin
between 18-20 utc and mainly from The St Johns River/I-95
westward. Best chance of precipitation should be at KJAX and
KVQQ with tempos for those stations between 2-3SM and 3-5 KFT
Ceilings between 18-22 utc. Later in the day the west coast sea
breeze will become active with a similar tempo group for KGNV
between 22 and 02 utc.

&&

.MARINE...
An extended period with no marine headlines. Prevailing offshore
flow 10-15 kts for most of the period with a local SSE-ESE east
coast sea breeze developing each afternoon through Friday
nearshore. Combined seas 4 ft or less. Stronger WSW winds into
the weekend will likely keep east coast sea breeze offshore.
Nocturnal wind surge under SW flow will near 15 kts into the
weekend. Best chances of thunderstorms will focus inland through
Thursday, then thunderstorm chances increase over the local waters
into the weekend.

RIP CURRENTS: Low risk today and Thursday.

&&

.PRELIMINARY POINT TEMPS/POPS...
AMG  99  76  96  74 /  60  60  70  50
SSI  95  81  91  78 /  30  20  30  30
JAX  98  77  95  76 /  50  40  50  40
SGJ  94  79  91  76 /  40  20  30  30
GNV  96  76  93  75 /  70  60  70  40
OCF  95  75  94  75 /  70  60  60  40

&&

.JAX WATCHES/WARNINGS/ADVISORIES...
FL...Heat Advisory until 6 PM EDT this evening for Baker-Bradford-
     Central Marion-Clay-Coastal Duval-Coastal Flagler-Coastal
     Nassau-Coastal St. Johns-Eastern Alachua-Eastern Marion-
     Gilchrist-Hamilton-Inland Duval-Inland Flagler-Inland
     Nassau-Inland St. Johns-Northern Columbia-Putnam-Southern
     Columbia-Suwannee-Union-Western Alachua-Western Marion.

GA...Heat Advisory until 6 PM EDT this evening for Atkinson-Brantley-
     Clinch-Coastal Camden-Coastal Glynn-Echols-Inland Camden-
     Inland Glynn-Northeastern Charlton-Northern Ware-Pierce-
     Southern Ware-Western Charlton.

AM...None.
&&

Sandrik/Nelson/Kennedy

In the hours before

Special weather statement, Jul 3, 5:16 PM EDT, 42 minutes before
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Special weather statement, Jul 3, 5:26 PM EDT, 32 minutes before
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Special weather statement, Jul 3, 5:37 PM EDT, 21 minutes before
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Local storm report, Jul 3, 5:48 PM EDT, 10 minutes before
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Special weather statement, Jul 3, 5:51 PM EDT, 7 minutes before
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Special weather statement, Jul 3, 5:53 PM EDT, 5 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 3, 3:02 PM EDTSpecial Weather StatementJAXBaker43 min
Jul 3, 3:06 PM EDTSpecial Weather StatementJAXClay24 min
Jul 3, 3:19 PM EDTSevere Thunderstorm WarningJAXDuval41 min
Jul 3, 3:34 PM EDTSevere Thunderstorm WarningJAXClay41 min
Jul 3, 3:52 PM EDTSevere Thunderstorm WarningJAXDuval38 min
Jul 3, 3:58 PM EDTHeat AdvisoryJAXAlachua, Baker, Bradford, Duval, Flagler, Gilchrist and 4 more25 hr
Jul 3, 4:04 PM EDTAreal Flood AdvisoryJAXDuval86 min
Jul 3, 4:06 PM EDTSevere Thunderstorm WarningJAXDuval, Nassau39 min
Jul 3, 4:25 PM EDTSevere Thunderstorm WarningJAXDuval28 min
Jul 3, 4:34 PM EDTSpecial Weather StatementJAXNassau41 min
Jul 3, 4:37 PM EDTSpecial Weather StatementJAXPutnam23 min
Jul 3, 4:59 PM EDTSpecial Weather StatementJAXPutnam46 min
Jul 3, 5:02 PM EDTSpecial Weather StatementJAXSaint Johns28 min
Jul 3, 5:16 PM EDTSpecial Weather StatementJAXColumbia29 min
Jul 3, 5:26 PM EDTSpecial Weather StatementJAXAlachua34 min
Jul 3, 5:37 PM EDTSpecial Weather StatementJAXHamilton38 min
Jul 3, 5:51 PM EDTSpecial Weather StatementJAXColumbia39 min
Jul 3, 5:53 PM EDTSpecial Weather StatementJAXGilchrist37 min
Jul 3, 5:56 PM EDTAreal Flood AdvisoryJAXColumbia, Hamilton2 hr
Jul 3, 6:10 PM EDTSpecial Weather StatementJAXSuwannee35 min
Jul 3, 6:25 PM EDTSpecial Weather StatementJAXUnion35 min
Jul 3, 6:39 PM EDTSpecial Weather StatementJAXSuwannee36 min
Jul 3, 6:44 PM EDTAreal Flood AdvisoryJAXSuwannee91 min
Jul 3, 6:54 PM EDTSevere Thunderstorm WarningJAXSuwannee36 min
Jul 3, 7:05 PM EDTSpecial Weather StatementJAXGilchrist40 min
Jul 3, 7:25 PM EDTSpecial Weather StatementJAXMarion35 min
Jul 3, 7:30 PM EDTSpecial Weather StatementJAXSuwannee30 min
Jul 2, 8:27 PM EDTSpecial Weather StatementJAXCharlton33 min
Jul 2, 9:24 PM EDTSpecial Weather StatementJAXCharlton36 min
Jul 3, 2:06 PM EDTSpecial Weather StatementJAXWare24 min
Jul 3, 2:25 PM EDTSpecial Weather StatementJAXBrantley35 min
Jul 3, 2:31 PM EDTSpecial Weather StatementJAXWare44 min
Jul 3, 2:48 PM EDTSpecial Weather StatementJAXCamden27 min
Jul 3, 2:56 PM EDTSpecial Weather StatementJAXCoffee34 min
Jul 3, 3:20 PM EDTSpecial Weather StatementJAXBrantley40 min
Jul 3, 3:47 PM EDTSpecial Weather StatementJAXCoffee43 min
Jul 3, 3:49 PM EDTSpecial Weather StatementJAXCamden41 min

Nearby

Severe Thunderstorm Warnings in Florida, 2019Every severe thunderstorm warning in 2019

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.