Alert archive / Florida / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 172, NWS Tallahassee, FL

June 25, 2019Holmes County, Walton County, Washington County, Florida

NWS Tallahassee, FL issued this severe thunderstorm warning at Jun 25, 2019, 6:09 PM CDT for Holmes County, Walton County, Washington County, Florida. It was in force for 66 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 25, 2019, 6:09 PM CDT (23:09 UTC)
Expired: Jun 25, 2019, 7:15 PM CDT
In force: 66 min
Issued by: NWS Tallahassee, FL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Holmes County, FL, Walton County, FL, Washington County, FL

The radar

The Eglin Afb radar (KEVX), 15 km from the middle of the area, began a volume at 23:13 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

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 11.2 hours before the alert went out and 155 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1421 J/kg
Mixed-layer CIN: -55 J/kg
Mixed-layer LCL: 1049 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: 6 m²/s²
0-3 km storm-relative helicity: -144 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 Tallahassee, FL wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 25, 1:59 PM CDT, 4 hours 10 minutes earlier.

Area forecast discussion, Jun 25, 1:59 PM CDT, 4 hours 10 minutes before

Area Forecast Discussion
National Weather Service Tallahassee FL
259 PM EDT Tue Jun 25 2019

.NEAR TERM [Through Tonight]...

Southwesterly flow aloft prevails on the western periphery of
mid/upper ridging, with weak southwesterly flow at the surface near
the center of high pressure. A theta-e boundary is noted from west
to east along the FL/AL/GA state lines. The afternoon seabreeze in
the Panhandle is forecast to interact with this boundary in the next
couple of hours and result in scattered to numerous storms around
the I-10 corridor. With some mid-level dry air in place, delta theta-
e values, and subsequently the WMSI, will be elevated today. This
means that the more robust storms that develop will have a good
chance of producing severe wind gusts and possibly some small hail.
Storms will generally drift northeast into southeast Alabama and
extreme southwest GA through the evening. Storms should come to an
end everywhere by 10-11pm EDT.

.SHORT TERM [Wednesday Through Thursday Night]...

In the upper levels a ridge will be over the region with possibly a
shortwave moving through tomorrow afternoon. At the surface weak
high pressure will be over the Southeast. Low level flow will be
northerly becoming easterly Thursday. With northerly winds
instability will be lower tomorrow and Thursday. The best chance for
storms will be on Thursday with POPs of 30 to 50 percent. Highs will
be in the lower to mid 90s. Lows will be in the lower 70s.

.LONG TERM [Friday Through Tuesday]...

In the upper levels a ridge will be over the region. At the surface
weak high pressure will be over the Southeast. Low level flow will
be easterly becoming southerly this weekend. A wet pattern will
return this weekend with POPs of 40 to 50 percent Friday, Saturday
and Sunday. Early next week POPs will be lower around 30 percent.
Highs will be in the low to mid 90s. Lows will be in the low to mid
70s.

&&

.AVIATION...
[Through 18Z Wednesday]

VFR conditions are expected, away from thunderstorms, through the
duration of the TAF. Storms are most likely late this afternoon at
TLH, ECP, and VLD. Should a terminal be impacted by a storm, there's
a higher than usual chance for strong downbursts on the order of 40-
50kts. Storms should come to an end by 02-03z.

&&

.MARINE...

A wet pattern will be in place this weekend. Light to moderate
northerly winds will become easterly Thursday. Seas will be 1 to 2
feet.

&&

.FIRE WEATHER...

Aside from high dispersion indices, hazardous fire weather
conditions are not expected.

&&

.HYDROLOGY...

Local rivers are below action stage and steady. Afternoon and
evening showers and thunderstorms are expected this week. The
stronger storms with heavier downpours may produce localized
flooding especially ponding on roadways and flooding of low lying
areas. Less than one inch of rain if forecast over the next three
days.

&&

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not requested. However, spotters are always
encouraged to safely report significant weather conditions when they
occur by calling the office or tweeting us @NWSTallahassee.

&&

.PRELIMINARY POINT TEMPS/POPS...

Tallahassee   73  96  72  93  71 /  20  20  10  50  30
Panama City   77  92  76  90  75 /  20  10  10  50  30
Dothan        71  93  72  94  72 /  40  30  10  30  30
Albany        73  94  73  94  72 /   0  30   0  20  10
Valdosta      73  96  72  94  70 /   0  10  10  40  20
Cross City    73  96  73  93  71 /  10  20  10  40  20
Apalachicola  76  92  76  90  75 /  10  20  10  30  40

&&

.TAE WATCHES/WARNINGS/ADVISORIES...
FL...High Rip Current Risk through Wednesday morning for Coastal Bay-
     Coastal Franklin-Coastal Gulf-South Walton.

GA...None.
AL...None.
GM...None.
&&

NEAR TERM...Harrigan
SHORT TERM...McD
LONG TERM...McD
AVIATION...Harrigan
MARINE...McD
FIRE WEATHER...DVD
HYDROLOGY...McD

In the hours before

Special weather statement, Jun 25, 4:23 PM CDT, 1 hour 46 minutes before

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Local storm report, Jun 25, 4:27 PM CDT, 1 hour 42 minutes before

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Special weather statement, Jun 25, 4:52 PM CDT, 1 hour 17 minutes before

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Special weather statement, Jun 25, 4:56 PM CDT, 1 hour 13 minutes before

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Special weather statement, Jun 25, 5:30 PM CDT, 39 minutes before

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Special weather statement, Jun 25, 5:56 PM CDT, 13 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 24, 7:40 PM CDT	Special Weather Statement	TAE	Madison	35 min
Jun 25, 2:25 PM CDT	Special Weather Statement	TAE	Washington	35 min
Jun 25, 2:56 PM CDT	Special Weather Statement	TAE	Washington	49 min
Jun 25, 3:22 PM CDT	Special Weather Statement	TAE	Liberty	68 min
Jun 25, 3:32 PM CDT	Special Weather Statement	TAE	Wakulla	43 min
Jun 25, 3:41 PM CDT	Severe Thunderstorm Warning	TAE	Wakulla	42 min
Jun 25, 3:43 PM CDT	Special Marine Warning	TAE		92 min
Jun 25, 3:51 PM CDT	Special Weather Statement	TAE	Taylor	39 min
Jun 25, 4:17 PM CDT	Special Weather Statement	TAE	Walton	43 min
Jun 25, 4:23 PM CDT	Special Weather Statement	TAE	Liberty	67 min
Jun 25, 4:29 PM CDT	Special Marine Warning	TAE		2 hr
Jun 25, 4:52 PM CDT	Special Weather Statement	TAE	Wakulla	23 min
Jun 25, 4:56 PM CDT	Special Weather Statement	TAE	Walton	34 min
Jun 25, 5:16 PM CDT	Special Marine Warning	TAE		59 min
Jun 25, 5:30 PM CDT	Special Weather Statement	TAE	Holmes	30 min
Jun 25, 5:56 PM CDT	Special Weather Statement	TAE	Holmes, Walton	49 min
Jun 25, 6:21 PM CDT	Special Marine Warning	TAE		54 min
Jun 25, 6:37 PM CDT	Special Marine Warning	TAE		40 min
Jun 25, 6:39 PM CDT	Severe Thunderstorm Warning	TAE	Walton	34 min
Jun 25, 3:45 PM CDT	Special Weather Statement	TAE	Decatur, Grady	45 min
Jun 25, 6:44 PM CDT	Special Weather Statement	TAE	Grady	31 min

Nearby

Severe Thunderstorm Warnings in Florida, 2019 Every 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.