Alert archive / Florida / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 177, NWS Tallahassee, FL

July 22, 2018Jefferson County, Madison County, Taylor County, Florida

NWS Tallahassee, FL issued this severe thunderstorm warning at Jul 22, 2018, 6:14 PM EDT for Jefferson County, Madison County, Taylor County, Florida. It was in force for 46 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 22, 2018, 6:14 PM EDT (22:14 UTC)
Expired: Jul 22, 2018, 7:00 PM EDT
In force: 46 min
Issued by: NWS Tallahassee, FL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Jefferson County, FL, Madison County, FL, Taylor County, FL

The radar

The Tallahassee radar (KTLH), 51 km from the middle of the area, began a volume at 22:17 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

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 22, 11:15 AM EDT	Severe Thunderstorm Watch	SPC	10 hr

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 10.2 hours before the alert went out and 49 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: 3735 J/kg
Mixed-layer CIN: -16 J/kg
Mixed-layer LCL: 715 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 102 m²/s²
0-3 km storm-relative helicity: 83 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 7.6

Open this sounding in Storm Lab

The text

As transmitted.

302 
WUUS52 KTAE 222214
SVRTAE
FLC065-079-123-222300-
/O.NEW.KTAE.SV.W.0177.180722T2214Z-180722T2300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tallahassee FL
614 PM EDT SUN JUL 22 2018

The National Weather Service in Tallahassee has issued a

* Severe Thunderstorm Warning for...
  Southwestern Jefferson County in Big Bend of Florida...
  Northwestern Taylor County in Big Bend of Florida...
  Southwestern Madison County in Big Bend of Florida...

* Until 700 PM EDT.

* At 614 PM EDT, a severe thunderstorm was located 16 miles south of
  Monticello, moving southeast at 35 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Perry, Goose Pasture, Hells Half Acre, Iddo, Moseley Hall, Ebb,
  Secotan, Boyd, Lamont, Hopewell, Capps, Eridu, Cabbage Grove,
  Thomas City, Scanlon, Econfina, Lake Bird, Fanlew, Waukeenah and
  Wacissa.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 2993 8374 3028 8408 3029 8408 3047 8398
      3038 8340
TIME...MOT...LOC 2214Z 302DEG 33KT 3030 8389 

HAIL...1.00IN
WIND...60MPH
 
$$

15-HARRIGAN

2 follow-up statements

370 
WWUS52 KTAE 222226
SVSTAE

Severe Weather Statement
National Weather Service Tallahassee FL
626 PM EDT SUN JUL 22 2018

FLC065-079-123-222300-
/O.CON.KTAE.SV.W.0177.000000T0000Z-180722T2300Z/
Jefferson FL-Taylor FL-Madison FL-
626 PM EDT SUN JUL 22 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT
FOR CENTRAL JEFFERSON...NORTH CENTRAL TAYLOR AND SOUTHWESTERN MADISON
COUNTIES...

At 626 PM EDT, a severe thunderstorm was located 15 miles northwest
of Perry, moving southeast at 40 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Perry, Iddo, Moseley Hall, Ebb, Secotan, Boyd, Lamont, Hopewell,
Capps, Eridu, Lake Bird, Waukeenah, Hampton Springs, Sirmans and
Shady Grove.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3006 8364 3018 8385 3031 8391 3047 8398
      3038 8340
TIME...MOT...LOC 2226Z 302DEG 33KT 3024 8378 

HAIL...1.00IN
WIND...60MPH
 
$$

15-HARRIGAN

309 
WWUS52 KTAE 222240
SVSTAE

Severe Weather Statement
National Weather Service Tallahassee FL
640 PM EDT SUN JUL 22 2018

FLC065-222250-
/O.CAN.KTAE.SV.W.0177.000000T0000Z-180722T2300Z/
Jefferson FL-
640 PM EDT SUN JUL 22 2018

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL JEFFERSON COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
Big Bend of Florida.

LAT...LON 3006 8364 3016 8373 3028 8379 3041 8375
      3038 8340
TIME...MOT...LOC 2240Z 302DEG 33KT 3017 8365 

$$

FLC079-123-222300-
/O.CON.KTAE.SV.W.0177.000000T0000Z-180722T2300Z/
Taylor FL-Madison FL-
640 PM EDT SUN JUL 22 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT
FOR NORTH CENTRAL TAYLOR AND SOUTHWESTERN MADISON COUNTIES...

At 640 PM EDT, a severe thunderstorm was located near Perry, moving
southeast at 40 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Perry, Lake Bird, Iddo, Moseley Hall, Ebb, Secotan, Boyd, Hopewell,
Eridu, Hampton Springs, Sirmans and Shady Grove.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3006 8364 3016 8373 3028 8379 3041 8375
      3038 8340
TIME...MOT...LOC 2240Z 302DEG 33KT 3017 8365 

HAIL...1.00IN
WIND...60MPH
 
$$

32

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 22, 3:38 PM EDT, 2 hours 36 minutes earlier.

Area forecast discussion, Jul 22, 3:38 PM EDT, 2 hours 36 minutes before

Area Forecast Discussion
National Weather Service Tallahassee FL
338 PM EDT Sun Jul 22 2018

.NEAR TERM [Through Tonight]...

Unusually amplified pattern for late July continues to support
rounds of severe weather across the forecast area. Convection
continues to develop along and just west of the Suwannee River,
generally becoming severe after moving across the river. To the
west, severe convection has formed along the nose of a 500mb speed
max, where deep layer shear is maximized. Developing in a strongly
unstable atmosphere (SBCAPE of 4500j/kg from 18Z KTAE sounding) with
unidirectional shear, these cells are showing splitting
characteristics with strong left and right moving members. This
cluster is expected to continue developing southeastward with time
this afternoon, bringing the threat for damaging winds, large hail,
and isolated tornadoes through SE Alabama and into the Florida
Panhandle and Big Bend.

This activity will continue offshore and into the southeastern Big
Bend this evening before exiting the region overnight.

.SHORT TERM [Monday Through Tuesday Night]...

The incredibly anomalous (-4 standard deviation) upper-low will
slide over the Tri-State region on Monday. As it does so, the best
large-scale forcing and deep layer shear will be southwest and
east of us. Expect scattered seabreeze development to remain in
north Florida, though boundaries from storms developing east of
us, and boundaries put off from seabreeze storms could result in
a scattering of storms region-wide tomorrow. On Tuesday, the
frontal boundary associated with the filling upper-low may drift
back inland and westward as it begins to weaken. This, combined
with the seabreeze will be the focus for scattered storms. Again,
severe weather is not expected.

.LONG TERM [Wednesday Through Sunday]...

Starting Wednesday, we'll transition back to a more typical
summertime patter across the region, with the seabreeze being the
main forcing mechanism for afternoon storms. Highs and lows will
run about normal for this time of year.

&&

.AVIATION [Through 18Z Monday]...

Thunderstorms with strong winds and hail have the potential to
impact area terminals this afternoon, especially KDHN, KECP,and
KTLH. Activity should diminish from west to east after dark, with
VFR conditions expected to prevail overnight.

&&

.MARINE...

Advisory conditions will continue into tonight before subsiding to
Cautionary conditions on Monday, and below headline levels by
Monday night. A return to typically low winds and seas is expected
by Tuesday.

&&

.FIRE WEATHER...

Hazardous fire weather conditions are not expected over the next
several days.

&&

.HYDROLOGY...

As storms become more scattered in nature beginning tomorrow, the
threat for flooding will decrease significantly.

&&

.SPOTTER INFORMATION STATEMENT...

Spotter activation is requested. Spotters should safely report
significant weather conditions and/or damage by calling the office or
tweeting us @NWSTallahassee.

&&

.PRELIMINARY POINT TEMPS/POPS...

Tallahassee   73  90  72  89  72 /  50  50  20  60  30
Panama City   78  89  76  87  77 /  50  40  20  50  30
Dothan        72  88  72  87  73 /  30  40  20  60  30
Albany        72  88  72  88  74 /  30  40  20  70  30
Valdosta      71  89  72  88  72 /  40  50  20  70  30
Cross City    74  90  73  87  73 /  70  50  30  60  50
Apalachicola  78  88  76  87  77 /  60  30  20  50  30

&&

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

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

GA...None.
AL...None.
GM...Small Craft Advisory until 4 AM EDT Monday for Apalachee Bay or
     Coastal Waters From Keaton Beach to Ochlockonee River FL
     out to 20 Nm-Coastal Waters From Ochlockonee River to
     Apalachicola Fl out to 20 Nm-Coastal waters from Suwannee
     River to Keaton Beach FL out 20 NM-Coastal waters from
     Mexico Beach to Apalachicola FL out 20 NM-Coastal waters
     from Mexico Beach to Okaloosa Walton County Line FL out 20
     NM-Waters from Suwannee River to Apalachicola FL from 20 to
     60 NM-Waters from Apalachicola to Mexico Beach FL from 20
     to 60 NM-Waters from Mexico Beach to Okaloosa Walton County
     Line FL from 20 to 60 NM.

&&

NEAR TERM...Camp
SHORT TERM...Harrigan
LONG TERM...Harrigan
AVIATION...Camp
MARINE...Harrigan
FIRE WEATHER...Harrigan
HYDROLOGY...Harrigan

In the hours before

Local storm report, Jul 22, 3:26 PM EDT, 2 hours 48 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
326 PM EDT SUN JUL 22 2018

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

0314 PM     HAIL             1 WNW OZARK             31.46N 85.67W
07/22/2018  E1.00 INCH       DALE               AL   PUBLIC

            REPORT OF QUARTER SIZED HAIL IN OZARK.

&&

RH

Local storm report, Jul 22, 3:39 PM EDT, 2 hours 35 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
339 PM EDT SUN JUL 22 2018

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

0312 PM     TSTM WND DMG     1 SSW MAYO              30.04N 83.18W
07/22/2018                   LAFAYETTE          FL   911 CALL CENTER

            REPORTS OF NUMEROUS TREES AND POWER LINES
            DOWN ACROSS LAFAYETTE COUNTY.

&&

RH

Local storm report, Jul 22, 3:51 PM EDT, 2 hours 23 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
351 PM EDT SUN JUL 22 2018

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

0312 PM     TSTM WND DMG     OZARK                   31.45N 85.65W
07/22/2018                   DALE               AL   911 CALL CENTER

            REPORTS OF NUMEROUS TREES DOWN ACROSS DALE
            COUNTY ALONG WITH REPORTS OF QUARTER SIZED
            HAIL.

&&

RH

Local storm report, Jul 22, 4:01 PM EDT, 2 hours 13 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
401 PM EDT SUN JUL 22 2018

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

0335 PM     TSTM WND DMG     4 S GANER               31.03N 86.12W
07/22/2018                   GENEVA             AL   911 CALL CENTER

            TREE REPORTED DOWN ACROSS HIGHWAY 153.

&&

RH

Local storm report, Jul 22, 4:58 PM EDT, 1 hour 16 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
458 PM EDT SUN JUL 22 2018

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

0400 PM     TSTM WND DMG     2 S FORT GAINES         31.60N 85.05W
07/22/2018                   CLAY               GA   PUBLIC

            POWER LINE DOWN SOUTH OF FORT GAINES ALONG
            SMITH LN.

&&

FD

Local storm report, Jul 22, 5:01 PM EDT, 1 hour 13 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
501 PM EDT SUN JUL 22 2018

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

0406 PM     TSTM WND DMG     2 SE FORT GAINES        31.61N 85.03W
07/22/2018                   CLAY               GA   PUBLIC

            MULTIPLE TRESS DOWN WEST OF FORT GAINES, GA
            ALONG EDISON HWY.

&&

FD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 21, 10:49 PM EDT	Severe Thunderstorm Warning	TAE	Gadsden, Jefferson, Leon	71 min
Jul 21, 11:31 PM EDT	Severe Thunderstorm Warning	TAE	Gadsden, Leon	38 min
Jul 22, 3:15 AM EDT	Special Weather Statement	TAE	Jackson	30 min
Jul 22, 3:39 AM EDT	Special Weather Statement	TAE	Jackson	51 min
Jul 22, 3:58 AM EDT	Heat Advisory	TAE	Bay, Calhoun, Franklin, Gadsden, Gulf, Holmes and 7 more	14 hr
Jul 22, 4:05 AM EDT	Rip Current Statement	TAE	Bay, Franklin, Gulf, Walton	44 hr
Jul 22, 2:54 PM EDT	Severe Thunderstorm Warning	TAE	Lafayette	51 min
Jul 22, 2:57 PM EDT	Severe Thunderstorm Warning	TAE	Holmes, Walton	48 min
Jul 22, 3:19 PM EDT	Severe Thunderstorm Warning	TAE	Taylor	41 min
Jul 22, 3:34 PM EDT	Severe Thunderstorm Warning	TAE	Holmes, Jackson	41 min
Jul 22, 3:36 PM EDT	Severe Thunderstorm Warning	TAE	Holmes, Walton, Washington	39 min
Jul 22, 3:42 PM EDT	Severe Thunderstorm Warning	TAE	Lafayette	48 min
Jul 22, 3:56 PM EDT	Severe Thunderstorm Warning	TAE	Taylor	49 min
Jul 22, 4:00 PM EDT	Severe Thunderstorm Warning	TAE	Calhoun, Gadsden, Leon, Liberty, Wakulla	29 min
Jul 22, 4:05 PM EDT	Severe Thunderstorm Warning	TAE	Bay, Holmes, Walton, Washington	40 min
Jul 22, 4:17 PM EDT	Severe Thunderstorm Warning	TAE	Dixie	43 min
Jul 22, 4:24 PM EDT	Special Marine Warning	TAE		96 min
Jul 22, 4:27 PM EDT	Severe Thunderstorm Warning	TAE	Calhoun, Jackson, Washington	48 min
Jul 22, 4:30 PM EDT	Severe Thunderstorm Warning	TAE	Dixie, Lafayette	60 min
Jul 22, 4:43 PM EDT	Severe Thunderstorm Warning	TAE	Bay, Calhoun, Gulf, Jackson, Walton, Washington	47 min
Jul 22, 4:49 PM EDT	Severe Thunderstorm Warning	TAE	Taylor	41 min
Jul 22, 4:56 PM EDT	Areal Flood Advisory	TAE	Dixie, Lafayette	3 hr
Jul 22, 5:03 PM EDT	Severe Thunderstorm Warning	TAE	Calhoun, Gadsden, Jackson, Liberty	42 min
Jul 22, 5:25 PM EDT	Severe Thunderstorm Warning	TAE	Bay, Calhoun, Franklin, Gulf, Liberty	33 min
Jul 22, 5:26 PM EDT	Severe Thunderstorm Warning	TAE	Dixie, Lafayette, Taylor	64 min
Jul 22, 5:32 PM EDT	Special Marine Warning	TAE		30 min
Jul 22, 5:36 PM EDT	Severe Thunderstorm Warning	TAE	Gadsden, Leon	39 min
Jul 22, 5:38 PM EDT	Severe Thunderstorm Warning	TAE	Calhoun, Gadsden, Leon, Liberty, Wakulla	19 min
Jul 22, 6:00 PM EDT	Severe Thunderstorm Warning	TAE	Jefferson, Leon	45 min
Jul 22, 6:13 PM EDT	Flash Flood Warning	TAE	Lafayette, Taylor	6 hr
Jul 22, 6:26 PM EDT	Severe Thunderstorm Warning	TAE	Lafayette, Taylor	64 min
Jul 22, 6:40 PM EDT	Severe Thunderstorm Warning	TAE	Jefferson, Madison	50 min
Jul 22, 6:53 PM EDT	Severe Thunderstorm Warning	TAE	Lafayette, Madison, Taylor	52 min
Jul 22, 7:29 PM EDT	Severe Thunderstorm Warning	TAE	Dixie, Lafayette	61 min
Jul 22, 7:50 PM EDT	Severe Thunderstorm Warning	TAE	Dixie	40 min
Jul 22, 7:51 PM EDT	Special Marine Warning	TAE		54 min

Nearby

Severe Thunderstorm Warnings in Florida, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.