Alert archive / Florida / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 214, NWS Tallahassee, FL

July 28, 2014Calhoun County, Jackson County, Liberty County, Florida

NWS Tallahassee, FL issued this severe thunderstorm warning at Jul 28, 2014, 6:21 PM CDT for Calhoun County, Jackson County, Liberty County, Florida. It was in force for 24 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 28, 2014, 6:21 PM CDT (23:21 UTC)
Expired: Jul 28, 2014, 6:45 PM CDT
In force: 24 min
Issued by: NWS Tallahassee, FL
Area: Storm-based polygon

Counties Calhoun County, FL, Jackson County, FL, Liberty County, FL

The radar

The Tallahassee radar (KTLH), 74 km from the middle of the area, began a volume at 23:21 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 28, 2:25 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 11.4 hours before the alert went out and 77 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: 2052 J/kg
Mixed-layer CIN: -28 J/kg
Mixed-layer LCL: 781 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: -4 m²/s²
0-3 km storm-relative helicity: 25 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 Jul 28, 1:41 PM CDT, 4 hours 40 minutes earlier.

Area forecast discussion, Jul 28, 1:41 PM CDT, 4 hours 40 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TALLAHASSEE FL
241 PM EDT Mon Jul 28 2014

.Near Term [Through Tonight]...
The cold front across the Southeast continues to move off toward
the Gulf Coast States with scattered convection already initiating
ahead of the boundary. Storms are also developing along the sea
breeze front, mainly in the Florida Big Bend. So far, development
through 1830z has been fairly close to the 28/09z WRF forecast, which
the morning forecast was weighted heavily toward.

Overall, the thermodynamic environment is quite favorable for
the additional development and intensification of storms. SBCAPE
values exceed 4000 J/kg across the entire forecast area.
Kinematics aren't overly impressive with deep layer shear values
only in the 25 to 30kt range. With the added forcing of the cold
front, expect storms to gradually merge into multi-cell clusters
or linear segments as they progress toward the region this
afternoon and evening. Primary concerns are for damaging winds.
Hail is also a possibility in the strongest storms.

Storms should diminish after about 04z as the cold front nears
the coast and much of the daily instability is lost. Cooler and
drier air will begin spreading into the region with overnight lows
north of the Florida border possibly dropping into the upper 60s.

.Short Term [Tuesday Through Wednesday Night]...
By Tuesday morning the cold front will be south of a
Valdosta-Tallahassee-Apalachicola line and will continue to push
south of the FL Big Bend by late afternoon. This will result in a
chance of showers and thunderstorms south of the front through the
day, mainly in the Big Bend area, with dry conditions Tuesday night
through Wednesday night.

The front will usher in cooler and much drier air, resulting in
overnight lows that will come close to some long-standing records.
For Tuesday night expect low 60s in southern AL and southern GA with
mid to upper 60s elsewhere. Similar readings are expected for
Wednesday although some locations could be cooler by a degrees or
two as drier air continues to work into the area. Daytime highs will
range from the upper 80s to the lower and mid 90s.

Stayed close to current forecasts for next couple of days. For
example at Tallahassee going for lows around 66 Wednesday and
Thursday mornings. The record lows here for those dates are:

July 30 - 67 (1927) Tuesday night/Wednesday morning
July 31 - 63 (1896) Wednesday night/Thursday morning

.Long Term [Thursday Through Monday]...
There will be continued amplification of the meridional upper level
flow as a strong high remains entrenched across the western CONUS
with a deep trough across the east. This pattern may finally begin
to weaken into early next week. In the meantime our area will remain
at the base of the upper level trough under broad cyclonic flow
aloft. Any subtle disturbances moving through the trough will help
enhance diurnal convection.

Another reinforcing surface boundary will sag across the southeast
U.S. by Friday with an east-west surface trough setting up along the
Gulf coast. This will be the focus for increased convection as we
move into the weekend and moisture gradually returns to the area.
Friday will be the transition day from dry to increasing moisture
with the weekend and early next week looking unsettled with high
rain chances. Overnight lows will return to normals in the 70s.
Daytime high temperatures will be somewhat suppressed compared to
last week with an increase in convection, with readings in the upper
80s and lower 90s.

&&

.Aviation...
[Through 18Z Tuesday]
Isolated showers and thunderstorms will develop over the Florida
counties early this afternoon. A stronger cluster or line of
thunderstorms is expected to develop over central AL/GA later this
afternoon. These storms will move into DHN and ABY late this
afternoon and towards TLH and VLD this evening. These storms could
produce very strong winds and small hail. Otherwise VFR conditions
are expected overnight and into tomorrow.

&&

.Marine...
Westerly winds will continue at a solid 15-20kt in the exercise
caution range with the approach of a cold front from the north.
Winds will become offshore behind the front on Tuesday and gradually
diminish Tuesday night. Expect light to moderate offshore winds
Wednesday through the end of the week.

&&

.Fire Weather...
Drier conditions will move in on Tuesday in the wake of a front
and continue through Thursday, with minimum relative humidity
values dropping into the lower 30s. Red flag conditions are
possible if conditions get drier than currently anticipated.

&&

.Hydrology...
Storms moving through the region today could produce isolated
rainfall totals around an inch or so, but widespread heavy totals
aren't anticipated. Storm motions are also quick enough to lessen
any flood concerns.

&&

.Preliminary Point Temps/PoPs...

Tallahassee   72  93  66  93  66 /  60  10   0  10   0
Panama City   75  92  72  90  72 /  60  10   0  10   0
Dothan        70  91  66  90  65 /  40   0   0  10   0
Albany        69  91  65  91  66 /  40   0   0  10   0
Valdosta      71  92  64  92  67 /  60  10   0  10   0
Cross City    75  93  68  94  69 /  50  30  10  10   0
Apalachicola  76  91  71  90  73 /  50  20   0  10   0

&&

.TAE Watches/Warnings/Advisories...

FL...Heat Advisory until 6 PM EDT /5 PM CDT/ this evening for Calhoun-
     Central Walton-Coastal Bay-Coastal Franklin-Coastal Gulf-
     Coastal Jefferson-Coastal Wakulla-Gadsden-Holmes-Inland Bay-
     Inland Franklin-Inland Gulf-Inland Jefferson-Inland Wakulla-
     Inland Walton-Jackson-Leon-Liberty-Madison-South Walton-
     Washington.

     High Rip Current Risk through late tonight for Coastal Bay-
     Coastal Franklin-Coastal Gulf-South Walton.

GA...Heat Advisory until 6 PM EDT this evening for Baker-Berrien-
     Brooks-Colquitt-Cook-Decatur-Early-Grady-Lanier-Lowndes-
     Miller-Mitchell-Seminole-Thomas.

AL...Heat Advisory until 5 PM CDT this afternoon for Geneva-Houston.

GM...None.

&&

NEAR TERM...GODSEY
SHORT TERM...HOLLINGSWORTH
LONG TERM...HOLLINGSWORTH
AVIATION...MCDERMOTT
MARINE...HOLLINGSWORTH
FIRE WEATHER...GODSEY
HYDROLOGY...GODSEY

In the hours before

Local storm report, Jul 28, 4:46 PM CDT, 1 hour 35 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
546 PM EDT MON JUL 28 2014

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0543 PM     NON-TSTM WND GST DOTHAN                  31.22N 85.39W
07/28/2014  M63 MPH          HOUSTON            AL   ASOS

            DOTHAN AIRPORT ASOS MEASURED 55 KT GUST.

&&

WESTON

Local storm report, Jul 28, 4:56 PM CDT, 1 hour 25 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE TALLAHASSEE FL
556 PM EDT MON JUL 28 2014

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0543 PM     TSTM WND GST     DOTHAN                  31.22N 85.39W
07/28/2014  M63.00 MPH       HOUSTON            AL   ASOS

            DOTHAN AIRPORT ASOS MEASURED 55 KT GUST.

&&

WESTON

Local storm report, Jul 28, 5:02 PM CDT, 1 hour 19 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
602 PM EDT MON JUL 28 2014

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0601 PM     TSTM WND DMG     OZARK                   31.45N 85.65W
07/28/2014                   DALE               AL   911 CALL CENTER

            TREES DOWN AT JULIAN ST.AND BROWN DR. AND ON MARVIN
            PARKER RD.

&&

WESTON

Local storm report, Jul 28, 5:11 PM CDT, 1 hour 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
611 PM EDT MON JUL 28 2014

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0610 PM     TSTM WND DMG     DOTHAN                  31.22N 85.39W
07/28/2014                   HOUSTON            AL   BROADCAST MEDIA

            POWERLINES DOWN IN DOTHAN.

&&

WESTON

Local storm report, Jul 28, 5:20 PM CDT, 1 hour 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
620 PM EDT MON JUL 28 2014

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0557 PM     TSTM WND DMG     3 WSW WEBB              31.25N 85.32W
07/28/2014                   HOUSTON            AL   BROADCAST MEDIA

            TWO TREES DOWN ON OLD WEBB ROAD.

&&

HARRIGAN

Local storm report, Jul 28, 5:51 PM CDT, 30 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
651 PM EDT MON JUL 28 2014

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0547 PM     HAIL             2 SW KINSEY             31.28N 85.37W
07/28/2014  E1.00 INCH       HOUSTON            AL   PUBLIC

            HAIL LARGER THAN QUARTER SIZE REPORTED AT THE
            INTERSECTION OF HIGHWAY 431 AND REMINGTON DR.

&&

HARRIGAN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 28, 1:14 AM CDT	Rip Current Statement	TAE	Bay, Franklin, Gulf, Walton	26 hr
Jul 28, 2:05 AM CDT	Heat Advisory	TAE	Bay, Calhoun, Franklin, Gadsden, Gulf, Holmes and 7 more	15 hr
Jul 28, 10:14 AM CDT	Special Marine Warning	TAE		91 min
Jul 28, 1:43 PM CDT	Special Weather Statement	TAE	Taylor	47 min
Jul 28, 5:24 PM CDT	Severe Thunderstorm Warning	TAE	Jackson	66 min
Jul 28, 5:53 PM CDT	Severe Thunderstorm Warning	TAE	Jackson, Washington	37 min
Jul 28, 6:37 PM CDT	Severe Thunderstorm Warning	TAE	Gadsden	38 min
Jul 28, 3:00 PM CDT	Special Weather Statement	TAE	Clay	45 min
Jul 28, 3:15 PM CDT	Special Weather Statement	TAE	Dougherty	45 min
Jul 28, 3:33 PM CDT	Severe Thunderstorm Warning	TAE	Dougherty, Lee, Terrell	42 min
Jul 28, 3:44 PM CDT	Severe Thunderstorm Warning	TAE	Turner	31 min
Jul 28, 4:14 PM CDT	Severe Thunderstorm Warning	TAE	Irwin, Turner	31 min
Jul 28, 4:40 PM CDT	Special Weather Statement	TAE	Baker, Mitchell	50 min
Jul 28, 4:52 PM CDT	Severe Thunderstorm Warning	TAE	Early	38 min
Jul 28, 3:19 PM CDT	Special Weather Statement	TAE	Dale	56 min
Jul 28, 3:24 PM CDT	Severe Thunderstorm Warning	TAE	Dale, Henry	36 min
Jul 28, 4:13 PM CDT	Special Weather Statement	TAE	Houston	47 min
Jul 28, 4:15 PM CDT	Severe Thunderstorm Warning	TAE	Henry	30 min
Jul 28, 4:17 PM CDT	Special Weather Statement	TAE	Dale	43 min
Jul 28, 4:35 PM CDT	Severe Thunderstorm Warning	TAE	Dale	40 min
Jul 28, 4:42 PM CDT	Severe Thunderstorm Warning	TAE	Dale, Henry, Houston	48 min

Nearby

Severe Thunderstorm Warnings in Florida, 2014 Every 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.