Alert archive / Florida / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 42, NWS Jacksonville, FL

May 24, 2018Columbia County, Hamilton County, Florida; Echols County, Georgia

NWS Jacksonville, FL issued this severe thunderstorm warning at May 24, 2018, 8:09 PM EDT for Columbia County, Hamilton County, Florida; Echols County, Georgia. It was in force for 51 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: May 24, 2018, 8:09 PM EDT (00:09 UTC)
Expired: May 24, 2018, 9:00 PM EDT
In force: 51 min
Issued by: NWS Jacksonville, FL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Columbia County, FL, Hamilton County, FL, Echols County, GA

The radar

The Moody AFB radar (KVAX), 49 km from the middle of the area, began a volume at 00:11 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.

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 May 24, 2:02 PM EDT, 6 hours 7 minutes earlier.

Area forecast discussion, May 24, 2:02 PM EDT, 6 hours 7 minutes before

Area Forecast Discussion
National Weather Service Jacksonville FL
202 PM EDT Thu May 24 2018

...SLOW-MOVING THUNDERSTORMS WITH HEAVY RAINFALL FOR THE NEXT FEW
DAYS...

.NEAR TERM /through Friday/...
Latest hi-res guidance indicates shows scattered showers and
t-storms this afternoon with sea breezes and south-central GA
boundary...increasing in coverage toward evening over western half
of forecast area. Some of this activity may drift back east over
central portions of our forecast area later in the evening while
gradually diminishing. Have shown this evolution in hourly
POP/Weather grids. Very light flow would support slow storm
motion, increasing the potential for locally heavy rainfall and
minor flooding.

Another round of sea breeze scattered convection Friday
afternoon...again becoming more numerous over western half of
foreccast area late in the day and into the evening.

Expect a mild night with low temperatures in the upper 60s to
lower 70s Tonight...and high temperatures in the mid-upper 80s
Friday...with lower 80s immediate coast.

.SHORT TERM.../Friday night through Monday/...
Lingering convection Friday evening, mainly near the I-75 corridor,
will dissipate by midnight, with partly cloudy skies through the
Overnight. The region will be between high pressure to the East
and a low pressure system to the Southwest Saturday. Enough
moisture to support mainly diurnal convection Saturday. Latest
model runs are trending toward bringing the low pressure system
into the North Central Gulf Saturday night into Sunday. As the low
moves further to the North, moisture will increase over the
region, producing increasing chances for convection into Sunday
afternoon. The low is expected to slowly move North into the
central Gulf coast states Sunday night into Monday. This will keep
the forecast area in the moist sector of this system with
convection and potential for heavy rainfall continuing, but will
largely be diurnal.

With the amount of cloud cover and precipitation expected this
weekend high temperatures will trend a little below seasonal
averages.

.LONG TERM.../Monday night through Thursday/...

The forecast will in large part depend on the track of this
weekend's low pressure system. The extended models currently
depict the this system to slowly move North Northeastward after
reaching land, with this pattern keeping ample moisture across the
region. The potential for a heavy rainfall pattern will continue
into Tuesday with largely diurnal convection, with primarily
diurnal convection for Wednesday and Thursday as well.

Temperatures are expected to trend near to slightly above normal
this period.

&&

.AVIATION...VFR conditions expected in general next 24 hrs...with
locally lower conditions where SHRA/TSRA occur. Best coverage over
TAF sites to be thru 22Z eastern TAF sites and 00z western sites.
Included mention of gusty winds with TSRA.

&&

.MARINE...Western Atlantic high pressure ridge will remain over
the waters... maintaining a SE flow across the waters through the
weekend. Winds and seas are expected to remain below advisory
criteria through Saturday. Winds and seas may increase to advisory
criteria by Sunday and Monday as the pressure gradient increases
across the waters.

Rip Currents: Moderate risk due to southeasterly flow.

&&

.PRELIMINARY POINT TEMPS/POPS...
AMG  68  86  68  83 /  80  60  20  30
SSI  72  81  72  80 /  20  20  10  30
JAX  70  86  69  83 /  30  30  10  30
SGJ  71  83  69  79 /  10  20  10  20
GNV  69  87  68  80 /  60  60  30  40
OCF  69  87  68  80 /  50  60  30  50

&&

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

Wolf/23/Cordero

In the hours before

Special weather statement, May 24, 6:52 PM EDT, 1 hour 17 minutes before

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Special weather statement, May 24, 7:03 PM EDT, 1 hour 6 minutes before

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Special weather statement, May 24, 7:21 PM EDT, 48 minutes before

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Special weather statement, May 24, 7:23 PM EDT, 46 minutes before

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Local storm report, May 24, 7:41 PM EDT, 28 minutes before

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Special weather statement, May 24, 7:59 PM EDT, 10 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
May 24, 8:13 PM EDT	Special Weather Statement	JAX	Columbia	47 min
May 24, 8:25 PM EDT	Areal Flood Advisory	JAX	Hamilton	2 hr
May 24, 8:42 PM EDT	Special Weather Statement	JAX	Columbia	33 min
May 24, 8:58 PM EDT	Special Weather Statement	JAX	Columbia	47 min
May 24, 9:03 PM EDT	Special Weather Statement	JAX	Hamilton	27 min
May 24, 9:15 PM EDT	Areal Flood Advisory	JAX	Columbia, Hamilton, Suwannee	2 hr
May 24, 9:37 PM EDT	Special Weather Statement	JAX	Columbia	23 min
May 24, 9:46 PM EDT	Areal Flood Advisory	JAX	Hamilton, Suwannee	2 hr
May 24, 9:59 PM EDT	Areal Flood Advisory	JAX	Columbia	2 hr
May 24, 10:19 PM EDT	Areal Flood Advisory	JAX	Marion	86 min
May 25, 4:15 PM EDT	Special Weather Statement	JAX	Suwannee	45 min
May 25, 6:38 PM EDT	Special Weather Statement	JAX	Gilchrist	52 min
May 25, 2:43 PM EDT	Special Weather Statement	JAX	Echols	47 min
May 25, 3:10 PM EDT	Special Weather Statement	JAX	Pierce	50 min
May 25, 3:43 PM EDT	Special Weather Statement	JAX	Ware	47 min

Nearby

Severe Thunderstorm Warnings in Florida, 2018 Severe Thunderstorm Warnings in Georgia, 2018 Every severe thunderstorm warning in 2018

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.