Alert archive / Georgia / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 299, NWS Tallahassee, FL

December 2, 2018Jackson County, Florida; Decatur County, Miller County, Seminole County, Georgia

NWS Tallahassee, FL issued this severe thunderstorm warning at Dec 2, 2018, 7:49 AM CST for Jackson County, Florida; Decatur County, Miller County, Seminole County, Georgia. It was in force for 16 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: Dec 2, 2018, 7:49 AM CST (13:49 UTC)
Expired: Dec 2, 2018, 8:05 AM CST
In force: 16 min
Issued by: NWS Tallahassee, FL
Area: Storm-based polygon

Counties Jackson County, FL, Decatur County, GA, Miller County, GA, Seminole County, GA

The radar

The Tallahassee radar (KTLH), 79 km from the middle of the area, began a volume at 13:52 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
Dec 2, 2:48 AM CST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 1.8 hours before the alert went out and 80 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: 2226 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 486 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 207 m²/s²
0-3 km storm-relative helicity: 293 m²/s²
Significant tornado parameter: 1.9
Supercell composite: 10.9

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 Dec 2, 5:27 AM CST, 2 hours 22 minutes earlier.

Area forecast discussion, Dec 2, 5:27 AM CST, 2 hours 22 minutes before

Area Forecast Discussion
National Weather Service Tallahassee FL
627 AM EST Sun Dec 2 2018

.AVIATION...
[Through 12Z Monday]

Southwesterly flow aloft will continue to fuel showers and
thunderstorms across the area today into tonight. Variable flt
conds will range from IFR in heavier convection to MVFR outside of
convection with winds mainly from the southwest but gusty in and
around convection. Overnight...some vsby restriction in fog and
mist appear possible at most TAF sites.

&&

.PREV DISCUSSION [313 AM EST]...

.NEAR TERM [Through Today]...

A cold front associated with a strong low pressure area is analyzed
across N/C AL southwest through southern Mississippi. This front is
expected to move towards and into our area today and then stall by
the end of the day from roughly Albany to Panama City. Southwest
mid/upper flow will remain and becoming parallel to the surface
front so training of showers and storms and a continued threat for
flash flooding will continue today. Probabilities of heavy rainfall
have increased to the east of the previous flash flood watch so I
have extended the watch eastward to along and just east of I-75.

Hi Res models continue to indicate enough decent MLCAPE and Bulk
Shear to warrant a severe risk through the day. Damaging winds and
and isolated tornado or two will be the main threats. SPC has
outlooked our entire area in a marginal risk of severe weather and
areas from Dothan, Marianna, and Tallahassee northeastward are
outlooked in a slight risk for severe weather.

.SHORT TERM [Tonight Through Tuesday]...

Heavy rain and isolated severe thunderstorm threat will persist
through Monday. Threat will gradually shift out of SE AL during
the time frame but the FFA was still extended for all areas in our
CWA except the southern Big Bend counties. Greatest flooding risk
will be over the GA and FL counties that have already seen
excessive rains of 3-6 inches. Conditions will dry out Monday
Night behind a rather strong cold front. Much less humid and
turning cooler on Tuesday.

.LONG TERM [Tuesday Night Through Sunday]...

Dry weather is expected through Friday as high pressure dominates.
Temperatures will start quite chilly but steadily warm during the
late week timeframe. Next rain chances arrive with what looks to
be another active front next weekend.

.MARINE...

Winds and seas will gradually subside today into tonight and
remain lower on Monday. Showers and thunderstorms will persist
over the waters into Monday. Winds and seas higher near
thunderstorms. A cold front will push through the waters by
Tuesday ushering in a period of strong northwesterly winds.

.FIRE WEATHER...

Other than low dispersions, widespread rainfall will preclude any
fire weather concerns through the period.

.HYDROLOGY...

A flash flood watch remains in effect for all but the southern Big
Bend through Monday and significant rises on many area rivers are
occurring and expected to continue. Three to locally six inches
of rain fell in several swaths across areas near and north of I-10
since Saturday morning. An additional one to three inches of rain
is expected through Monday with localized amounts of three to
five inches possible.

.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   78  65  75  53  62 /  80  70  90  20  10
Panama City   75  64  72  52  60 /  80  80  80  20   0
Dothan        74  58  69  46  55 /  70  70  70  10   0
Albany        76  60  70  48  58 /  80  80  70  10   0
Valdosta      78  65  74  52  61 /  80  70  90  30  10
Cross City    79  66  76  59  66 /  60  50  90  40  10
Apalachicola  76  66  74  55  63 /  70  70  90  30  10

&&

.TAE WATCHES/WARNINGS/ADVISORIES...
FL...Flash Flood Watch through Monday 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-
     Jackson-Leon-Liberty-North Walton-South Walton-Washington.

     High Rip Current Risk through this evening for Coastal Bay-
     Coastal Franklin-Coastal Gulf-South Walton.

     High Surf Advisory until 7 AM EST /6 AM CST/ this morning for
     Coastal Bay-Coastal Gulf-South Walton.

GA...Flash Flood Watch through Monday evening for Baker-Ben Hill-
     Berrien-Brooks-Calhoun-Clay-Colquitt-Cook-Decatur-Dougherty-
     Early-Grady-Irwin-Lanier-Lee-Lowndes-Miller-Mitchell-
     Quitman-Randolph-Seminole-Terrell-Thomas-Tift-Turner-Worth.

AL...Flash Flood Watch through Monday afternoon for Coffee-Dale-
     Geneva-Henry-Houston.

GM...Small Craft Advisory until 7 AM EST this morning 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...Scholl
SHORT TERM...Johnstone
LONG TERM...Johnstone
AVIATION...Scholl
MARINE...Johnstone
FIRE WEATHER...Johnstone
HYDROLOGY...Johnstone

In the hours before

Local storm report, Dec 2, 3:33 AM CST, 4 hours 16 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
433 AM EST SUN DEC 2 2018

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

0255 AM     TSTM WND DMG     W. MAIN/BRANNON ST      31.24N 85.48W
12/02/2018                   HOUSTON            AL   EMERGENCY MNGR

            HOUSTON EMA REPORTS A GARAGE WAS DESTROYED
            AND A VEHICLE FLIPPED OVER ON CHLOE CT. TIN
            ROOF WAS PEELED BACK ON A HOME. SEVERAL
            TREES AND POWER POLES SNAPPED.

&&

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 1, 6:01 PM CST	Areal Flood Advisory	TAE	Holmes, Jackson, Walton, Washington	119 min
Dec 1, 6:20 PM CST	Flash Flood Warning	TAE	Holmes, Jackson, Washington	4 hr
Dec 1, 7:27 PM CST	River Flood Warning	TAE	Walton	40 hr
Dec 1, 8:22 PM CST	Special Weather Statement	TAE	Holmes	23 min
Dec 1, 8:27 PM CST	River Flood Warning	TAE	Calhoun	17 days
Dec 2, 2:20 AM CST	Severe Thunderstorm Warning	TAE	Holmes, Walton	40 min
Dec 2, 3:43 AM CST	Severe Thunderstorm Warning	TAE	Holmes, Jackson, Walton	47 min
Dec 2, 5:01 AM CST	Severe Thunderstorm Warning	TAE	Holmes, Jackson, Washington	25 min
Dec 2, 5:32 AM CST	Areal Flood Advisory	TAE	Holmes, Jackson, Walton, Washington	58 min
Dec 2, 7:03 AM CST	Severe Thunderstorm Warning	TAE	Jackson	42 min
Dec 2, 9:07 AM CST	Severe Thunderstorm Warning	TAE	Jefferson, Madison	23 min
Dec 2, 9:20 AM CST	River Flood Warning	TAE	Jackson	8 days
Dec 2, 9:23 AM CST	River Flood Warning	TAE	Walton, Washington	8 days
Dec 2, 10:08 AM CST	River Flood Warning	TAE	Gadsden, Leon	9 days
Dec 2, 1:51 PM CST	Special Weather Statement	TAE	Liberty	39 min
Dec 2, 2:52 PM CST	Special Weather Statement	TAE	Jefferson	38 min
Dec 2, 3:27 PM CST	Severe Thunderstorm Warning	TAE	Jefferson, Madison	33 min
Dec 2, 3:47 PM CST	Special Weather Statement	TAE	Gulf	43 min
Dec 2, 3:51 PM CST	Special Marine Warning	TAE		39 min
Dec 2, 4:30 PM CST	Special Weather Statement	TAE	Wakulla	45 min
Dec 2, 5:02 PM CST	Special Weather Statement	TAE	Gulf	43 min
Dec 1, 6:40 PM CST	Flash Flood Warning	TAE	Decatur, Grady, Seminole	4 hr
Dec 1, 6:43 PM CST	Special Weather Statement	TAE	Berrien, Lanier	47 min
Dec 1, 7:36 PM CST	Flash Flood Warning	TAE	Seminole	2 hr
Dec 1, 8:54 PM CST	Areal Flood Advisory	TAE	Brooks, Lanier, Lowndes	2 hr
Dec 1, 8:59 PM CST	Areal Flood Advisory	TAE	Calhoun, Dougherty, Lee, Terrell	2 hr
Dec 1, 9:46 PM CST	Areal Flood Advisory	TAE	Calhoun, Lee, Randolph, Terrell	59 min
Dec 1, 10:43 PM CST	Special Weather Statement	TAE	Baker, Calhoun, Early	47 min
Dec 1, 10:48 PM CST	Flash Flood Warning	TAE	Calhoun, Lee, Randolph, Terrell	3 hr
Dec 1, 11:23 PM CST	Severe Thunderstorm Warning	TAE	Baker, Calhoun, Dougherty, Lee, Terrell	37 min
Dec 1, 11:27 PM CST	Severe Thunderstorm Warning	TAE	Clay, Early	48 min
Dec 2, 12:25 AM CST	Severe Thunderstorm Warning	TAE	Baker, Calhoun, Dougherty, Early, Terrell	50 min
Dec 2, 12:40 AM CST	Tornado Warning	TAE	Calhoun, Dougherty, Lee, Terrell	35 min
Dec 2, 1:01 AM CST	Severe Thunderstorm Warning	TAE	Dougherty, Lee, Worth	44 min
Dec 2, 1:16 AM CST	Tornado Warning	TAE	Dougherty, Worth	29 min
Dec 2, 1:54 AM CST	Severe Thunderstorm Warning	TAE	Early	51 min
Dec 2, 2:26 AM CST	Severe Thunderstorm Warning	TAE	Calhoun, Clay, Dougherty, Early, Randolph, Terrell	49 min
Dec 2, 2:43 AM CST	Areal Flood Advisory	TAE	Baker, Calhoun, Clay, Dougherty, Early, Lee and 3 more	2 hr
Dec 2, 3:01 AM CST	Severe Thunderstorm Warning	TAE	Baker, Calhoun, Dougherty, Early, Lee, Mitchell and 3 more	44 min
Dec 2, 3:14 AM CST	Flash Flood Warning	TAE	Calhoun, Dougherty, Lee, Randolph, Terrell, Worth	3 hr
Dec 2, 3:27 AM CST	Tornado Warning	TAE	Dougherty, Lee, Turner, Worth	33 min
Dec 2, 3:50 AM CST	Severe Thunderstorm Warning	TAE	Ben Hill, Irwin, Tift, Turner, Worth	40 min
Dec 2, 4:08 AM CST	Severe Thunderstorm Warning	TAE	Baker, Dougherty, Mitchell, Tift, Turner, Worth	31 min
Dec 2, 4:20 AM CST	Severe Thunderstorm Warning	TAE	Clay, Early, Miller	40 min
Dec 2, 4:41 AM CST	Areal Flood Advisory	TAE	Baker, Calhoun, Clay, Dougherty, Early, Lee and 3 more	2 hr
Dec 2, 7:33 AM CST	Severe Thunderstorm Warning	TAE	Decatur, Miller, Seminole	27 min
Dec 2, 7:36 AM CST	Tornado Warning	TAE	Colquitt, Mitchell, Tift, Worth	39 min
Dec 2, 7:57 AM CST	Severe Thunderstorm Warning	TAE	Baker, Dougherty, Miller, Mitchell	33 min
Dec 2, 8:12 AM CST	Tornado Warning	TAE	Berrien, Colquitt, Cook, Tift, Worth	35 min
Dec 2, 8:24 AM CST	Severe Thunderstorm Warning	TAE	Decatur, Grady, Mitchell, Seminole	51 min
Dec 2, 8:27 AM CST	Severe Thunderstorm Warning	TAE	Baker, Colquitt, Dougherty, Mitchell, Tift, Turner and 1 more	36 min
Dec 2, 8:50 AM CST	Severe Thunderstorm Warning	TAE	Colquitt, Decatur, Grady, Mitchell, Thomas	40 min
Dec 2, 8:59 AM CST	Severe Thunderstorm Warning	TAE	Berrien, Irwin, Tift	46 min
Dec 2, 9:12 AM CST	River Flood Warning	TAE	Lee	47 hr
Dec 2, 9:12 AM CST	River Flood Warning	TAE	Decatur	4 days
Dec 2, 10:08 AM CST	River Flood Warning	TAE	Grady, Thomas	5 days
Dec 2, 10:08 AM CST	River Flood Warning	TAE	Brooks, Lowndes	7 days
Dec 2, 12:15 PM CST	River Flood Warning	TAE	Lee	45 hr
Dec 2, 1:32 PM CST	Special Weather Statement	TAE	Lanier	43 min
Dec 2, 2:26 PM CST	Special Weather Statement	TAE	Lowndes	49 min
Dec 2, 4:00 PM CST	Special Weather Statement	TAE	Lowndes	30 min
Dec 1, 6:37 PM CST	Special Weather Statement	TAE	Dale, Geneva	53 min
Dec 1, 10:51 PM CST	Special Weather Statement	TAE	Houston	39 min
Dec 1, 10:58 PM CST	Severe Thunderstorm Warning	TAE	Dale, Geneva, Henry, Houston	47 min
Dec 2, 1:24 AM CST	Severe Thunderstorm Warning	TAE	Coffee, Dale, Geneva, Henry, Houston	51 min
Dec 2, 2:25 AM CST	Areal Flood Advisory	TAE	Coffee, Dale, Geneva, Henry, Houston	3 hr
Dec 2, 4:02 AM CST	Tornado Warning	TAE	Dale, Geneva, Henry, Houston	28 min
Dec 2, 1:07 PM CST	River Flood Warning	TAE	Dale	27 hr

Nearby

Severe Thunderstorm Warnings in Georgia, 2018 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.