Alert archive / Florida / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 198, NWS Tallahassee, FL

July 7, 2017Lafayette County, Madison County, Florida; Brooks County, Lowndes County, Georgia

NWS Tallahassee, FL issued this severe thunderstorm warning at Jul 7, 2017, 5:26 PM EDT for Lafayette County, Madison County, Florida; Brooks County, Lowndes County, Georgia. It was in force for 49 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 7, 2017, 5:26 PM EDT (21:26 UTC)
Expired: Jul 7, 2017, 6:15 PM EDT
In force: 49 min
Issued by: NWS Tallahassee, FL
Area: Storm-based polygon

Counties Lafayette County, FL, Madison County, FL, Brooks County, GA, Lowndes County, GA

The radar

The Moody AFB radar (KVAX), 54 km from the middle of the area, began a volume at 21:29 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 was reported inside it

Time	Report	Where	Remark
Jul 7, 5:30 PM EDT	TSTM WND DMG	3 E Pinetta, FL	TREE REPORTED DOWN E OF PINETTA

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this severe thunderstorm warning; the first came 4 minutes after it went out.

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 nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 9.4 hours before the alert went out and 99 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: 1252 J/kg
Mixed-layer CIN: -39 J/kg
Mixed-layer LCL: 1006 m above ground
0-6 km bulk shear: 3 kt
0-1 km storm-relative helicity: -30 m²/s²
0-3 km storm-relative helicity: -24 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

273 
WUUS52 KTAE 072126
SVRTAE
FLC067-079-GAC027-185-072215-
/O.NEW.KTAE.SV.W.0198.170707T2126Z-170707T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tallahassee FL
526 PM EDT FRI JUL 7 2017

The National Weather Service in Tallahassee has issued a

* Severe Thunderstorm Warning for...
  Northern Lafayette County in Big Bend of Florida...
  Eastern Madison County in Big Bend of Florida...
  Southwestern Lowndes County in south central Georgia...
  Southern Brooks County in south central Georgia...

* Until 615 PM EDT

* At 526 PM EDT, Doppler radar indicated a line of severe
  thunderstorms capable of producing quarter size hail and damaging
  winds in excess of 60 mph. These storms were located along a line
  extending from near Quitman to near Dowling Park, and moving east
  at 35 mph.

* Locations impacted include...
  Madison, Quitman, Lee, Dixie, Chancey, Hopewell, Cherry Lake,
  Hamburg, Pinetta, Mayo Junction, Kinderlou, Lovett, Nankin,
  Empress, Clyattville, Brooks Co A/p, Blue Springs and Hanson.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Severe thunderstorms produce damaging winds, destructive hail, deadly
lightning and very heavy rain. For your protection, move to an
interior room on the lowest floor of your home or business. Heavy
rains flood roads quickly so do not drive into areas where water
covers the road.

To report severe weather, contact the National Weather Service, or
your nearest law enforcement agency who will relay your report to the
National Weather Service office in Tallahassee.

&&

LAT...LON 3037 8319 3035 8319 3035 8321 3031 8321
      3030 8323 3025 8325 3017 8324 3033 8344
      3081 8370 3088 8342 3072 8330 3063 8329
      3062 8327 3059 8326 3055 8326 3052 8324
      3047 8324 3046 8322 3042 8322 3039 8317
TIME...MOT...LOC 2126Z 270DEG 29KT 3079 8362 3020 8321 

$$

18-WOOL

1 follow-up statement

667 
WWUS52 KTAE 072149
SVSTAE

Severe Weather Statement
National Weather Service Tallahassee FL
549 PM EDT FRI JUL 7 2017

GAC027-185-072158-
/O.CAN.KTAE.SV.W.0198.000000T0000Z-170707T2215Z/
Lowndes GA-Brooks GA-
549 PM EDT FRI JUL 7 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN LOWNDES AND
SOUTHERN BROOKS COUNTIES IS CANCELLED...

The storms which prompted the warning have weakened. Therefore, the 
warning has been cancelled.

LAT...LON 3037 8319 3035 8319 3035 8321 3031 8321
      3030 8323 3025 8325 3017 8324 3034 8337
      3049 8325 3048 8324 3047 8324 3046 8322
      3042 8322 3039 8317
TIME...MOT...LOC 2148Z 270DEG 29KT 3079 8343 3020 8302 

$$

FLC067-079-072215-
/O.CON.KTAE.SV.W.0198.000000T0000Z-170707T2215Z/
Lafayette FL-Madison FL-
549 PM EDT FRI JUL 7 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR NORTHERN LAFAYETTE AND SOUTHEASTERN MADISON COUNTIES...

At 548 PM EDT, severe thunderstorms were located along a line
extending from 7 miles west of I-75 At Exit 16 to near Mcalpin,
moving east 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...
Lee, Chancey and Mayo Junction. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Tallahassee.

&&

LAT...LON 3037 8319 3035 8319 3035 8321 3031 8321
      3030 8323 3025 8325 3017 8324 3034 8337
      3049 8325 3048 8324 3047 8324 3046 8322
      3042 8322 3039 8317
TIME...MOT...LOC 2148Z 270DEG 29KT 3079 8343 3020 8302 

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

18-WOOL

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 7, 3:12 PM EDT, 2 hours 14 minutes earlier.

Area forecast discussion, Jul 7, 3:12 PM EDT, 2 hours 14 minutes before

Area Forecast Discussion
National Weather Service Tallahassee FL
312 PM EDT Fri Jul 7 2017

.NEAR TERM [Through Tonight]...

The area will remain on the western edge of the surface ridge today
with its axis south of the area. A lee-side trough remains just
north of us. The 12Z KTAE sounding showed low to mid level
southwesterly flow, favorable for scattered sea-breeze-induced
convection. This is what we are seeing on radar this afternoon.
We'll see the convection develop slowly inland across our inland FL
zones. More isolated convection will occur across our northwestern
zones ahead of the trough. Isolated storms could linger into the
evening hours north of I-10 before dissipating. Another round of
isolated showers and storms will develop over the Gulf of Mexico
overnight and could come ashore before dawn along the panhandle
coast. It will be a typically muggy night with lows in the mid
70s.

.SHORT TERM [Saturday Through Sunday Night]...

An eastern CONUS trough will amplify a bit Saturday and Sunday as
a couple of shortwaves move through the Midwest. At the surface,
ridging will prevail locally with a cold front forecast to pull up
just short of the Tri-State region on Sunday. PoPs will be
slightly above normal over the weekend, driven by the seabreeze,
weak synoptic forcing, and possibly the front on Sunday. Afternoon
highs will be near the mid 90s on Saturday and closer to the lower
90s on Sunday.

.LONG TERM [Monday Through Friday]...

The eastern CONUS trough will retreat to the north beginning on
Monday, with deep layer ridging taking over through the end of
next week. The surface front will dissipate in place across the
Southeast as well. PoPs may still be slightly elevated on Monday
as the front dissipates nearby, with normal rain chances due to
the seabreezes expected for the remainder of the period. Highs
will gradually climb back through the middle 90s into the upper
90s by mid to late week.

&&

.AVIATION [Through 18Z Saturday]...

VFR conditions are forecast outside of thunderstorms. TLH will see
TS in and around the terminal early in this cycle. DHN may also get
some TS close to the terminal later this afternoon. Morning
convection over the Gulf of Mexico could get close to ECP by around
14Z Saturday.

&&

.MARINE...

Light winds and low seas will prevail for the next several days.
The only exceptions will slight afternoon wind and sea
enhancements in the seabreeze zone.

&&

.FIRE WEATHER...

No hazardous fire weather conditions are expected for the next
several days.

&&

.HYDROLOGY...

While storms will be a bit more numerous on Saturday and Sunday,
average 2-day totals should range between 1-2". Thereafter,
typical summertime storms and coverage are expected. Thus the
expected QPF over the weekend and the scattered nature of storms
through next week should preclude any river, urban, or rural
flooding concerns.

&&

.PRELIMINARY POINT TEMPS/POPS...

Tallahassee   75  93  74  91  73 /  10  50  20  70  30
Panama City   79  88  78  87  79 /  20  50  40  50  30
Dothan        74  90  74  90  74 /  20  50  20  60  30
Albany        75  91  74  91  74 /  20  40  20  60  50
Valdosta      73  95  73  93  72 /  10  30  20  60  40
Cross City    75  92  74  90  73 /  20  20  20  40  20
Apalachicola  78  89  77  88  77 /  10  30  30  50  30

&&

.TAE WATCHES/WARNINGS/ADVISORIES...
FL...None.
GA...None.
AL...None.
GM...None.
&&

NEAR TERM...Wool
SHORT TERM...Harrigan
LONG TERM...Harrigan
AVIATION...Wool
MARINE...Harrigan
FIRE WEATHER...Fournier
HYDROLOGY...Harrigan

In the hours before

Local storm report, Jul 7, 4:15 PM EDT, 1 hour 11 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
415 PM EDT FRI JUL 07 2017

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

0353 PM     TSTM WND DMG     1 NNE TALLAHASSEE       30.45N 84.28W
07/07/2017                   LEON               FL   911 CALL CENTER

            TREE DOWN IN MIDTOWN TALLAHASSEE ON CHERRY ST

&&

RH

Local storm report, Jul 7, 4:24 PM EDT, 1 hour 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
424 PM EDT FRI JUL 07 2017

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

0337 PM     TSTM WND DMG     5 SSE FLORALA           30.94N 86.28W
07/07/2017                   WALTON             FL   911 CALL CENTER

            REPORT OF TREE DOWN ON HWY 331 N

&&

RH

Special weather statement, Jul 7, 4:34 PM EDT, 52 minutes before

Special Weather Statement
National Weather Service Tallahassee FL
334 PM CDT FRI JUL 7 2017

ALZ065-072115-
Coffee AL-
334 PM CDT FRI JUL 7 2017

...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN COFFEE COUNTY UNTIL 415
PM CDT...

At 333 PM CDT, National Weather Service doppler radar indicated a a
strong thunderstorm 7 miles north of Elba, moving east at 20 mph.

Dime size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Elba, Lee, Java, Richburg, Mixons Crossroads, Victoria, Eanon, Lowry
Mill, Wilkinstown, Zoar, Camp Humming Hills, Wise Mill, Arcus,
Woodland Grove Church, Bluff Spring and Jack.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3162 8607 3162 8602 3157 8582 3135 8599
      3149 8619
TIME...MOT...LOC 2033Z 284DEG 13KT 3153 8608

ADL

Special weather statement, Jul 7, 4:38 PM EDT, 48 minutes before

Special Weather Statement
National Weather Service Tallahassee FL
338 PM CDT FRI JUL 7 2017

ALZ065-066-068-072115-
Dale AL-Coffee AL-Geneva AL-
338 PM CDT FRI JUL 7 2017

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN DALE...SOUTHEASTERN
COFFEE AND NORTH CENTRAL GENEVA COUNTIES UNTIL 415 PM CDT...

At 337 PM CDT, National Weather Service doppler radar indicated a a
strong thunderstorm 8 miles south of Enterprise, moving northeast at
15 mph.

Winds in excess of 40 mph will be possible with this storm.

Locations impacted include...
Daleville, Enterprise, Level Plains, Clayhatchee, Coffee Springs,
Chancellor, Keyton, Coppinville, Central City and Cool Springs.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3133 8581 3123 8569 3121 8569 3120 8571
      3119 8566 3110 8587 3117 8597
TIME...MOT...LOC 2037Z 235DEG 13KT 3121 8587

ADL

Special weather statement, Jul 7, 5:01 PM EDT, 25 minutes before

Special Weather Statement
National Weather Service Tallahassee FL
401 PM CDT FRI JUL 7 2017

ALZ065-066-072145-
Dale AL-Coffee AL-
401 PM CDT FRI JUL 7 2017

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN DALE AND CENTRAL
COFFEE COUNTIES UNTIL 445 PM CDT...

At 401 PM CDT, National Weather Service doppler radar indicated a a
strong thunderstorm near New Brockton, or 9 miles east of Elba,
moving east at 20 mph.

Dime size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Elba, Fort Rucker, Ozark, Enterprise, New Brockton, Ariton, Lee, Pine
Level, Mixons Crossroads, Curtis, Carl Folsom A/p, Dill, Lowry Mill,
Camp Humming Hills, Clintonville, Wise Mill, Roeton, Dale County
Lake, Marley Hill and Camp Alaflo Bsa.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3147 8620 3162 8586 3162 8578 3153 8558
      3139 8571 3130 8605 3133 8620
TIME...MOT...LOC 2101Z 281DEG 16KT 3146 8593

ADL

Special weather statement, Jul 7, 5:22 PM EDT, 4 minutes before

Special Weather Statement
National Weather Service Tallahassee FL
422 PM CDT FRI JUL 7 2017

ALZ066-067-072215-
Dale AL-Henry AL-
422 PM CDT FRI JUL 7 2017

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN DALE AND
SOUTHWESTERN HENRY COUNTIES UNTIL 515 PM CDT...

At 421 PM CDT, National Weather Service doppler radar indicated a a
strong thunderstorm near Ozark, moving east at 25 mph.

Winds in excess of 40 mph will be possible with this storm.

Locations impacted include...
Ozark, Newville, Bells Crossroads, Skipperville, Echo, Kirkland
Crossroads, Roberts Crossroads, Mabson, Arguta, Snells Crossroads,
Ewell, Barefield Crossroads, Beamon, Browns Crossroads, Dale County
Lake, Goldberg Field, Clopton, Blackwell Field A/p, Phillips
Crossroads and Ward Bridge.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3139 8534 3140 8564 3162 8564 3162 8542
      3163 8542 3163 8534
TIME...MOT...LOC 2121Z 270DEG 18KT 3150 8560

ADL

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 7, 2:27 PM EDT	Severe Thunderstorm Warning	TAE	Gadsden, Leon, Liberty	33 min
Jul 7, 2:30 PM EDT	Severe Thunderstorm Warning	TAE	Liberty, Wakulla	30 min
Jul 7, 3:02 PM EDT	Severe Thunderstorm Warning	TAE	Wakulla	28 min
Jul 7, 3:15 PM EDT	Severe Thunderstorm Warning	TAE	Leon, Wakulla	45 min
Jul 7, 3:50 PM EDT	Severe Thunderstorm Warning	TAE	Jefferson, Leon	25 min
Jul 7, 3:52 PM EDT	Severe Thunderstorm Warning	TAE	Walton	23 min
Jul 7, 4:16 PM EDT	Severe Thunderstorm Warning	TAE	Jefferson, Leon	29 min
Jul 7, 4:45 PM EDT	Severe Thunderstorm Warning	TAE	Jefferson, Madison	30 min
Jul 7, 5:03 PM EDT	Severe Thunderstorm Warning	TAE	Jefferson, Madison	27 min
Jul 7, 6:33 PM EDT	Special Weather Statement	TAE	Clay	42 min
Jul 7, 6:47 PM EDT	Special Weather Statement	TAE	Early	43 min
Jul 7, 6:52 PM EDT	Special Weather Statement	TAE	Quitman	53 min

Nearby

Severe Thunderstorm Warnings in Florida, 2017 Severe Thunderstorm Warnings in Georgia, 2017 Every severe thunderstorm warning in 2017

Sources

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