Alert archive / Florida / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 2, NWS Tallahassee, FL

January 2, 20174 counties in Florida; Coffee County, Geneva County, Alabama

NWS Tallahassee, FL issued this severe thunderstorm warning at Jan 2, 2017, 6:25 PM CST for 4 counties in Florida; Coffee County, Geneva County, Alabama. It was in force for 80 min. 5 reports 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
Jan 2, 2017, 6:25 PM CST (00:25 UTC)
Expired
Jan 2, 2017, 7:45 PM CST
In force
80 min
Issued by
NWS Tallahassee, FL
Area
Storm-based polygon
Tornado
Possible
Hail
0.75 in
Wind
70.0 mph

Counties Coffee County, AL, Geneva County, AL, Bay County, FL, Holmes County, FL, Walton County, FL, Washington County, FL

The radar

The Eglin Afb radar (KEVX), 26 km from the middle of the area, began a volume at 00:27 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

TimeReportWhereRemark
Jan 2, 6:47 PM CSTTSTM WND DMG2 Wnw Cluster Springs, FLREPORT OF TREES AND POWER LINES DOWN NEAR HIGHWAY 331 AND HIGHWAY 2A
Jan 2, 6:57 PM CSTTSTM WND DMGGaner, ALPOWER LINE DOWN IN THE WESTERN PART OF GENEVA COUNTY
Jan 2, 7:02 PM CSTTSTM WND DMGSamson, ALTREES DOWN IN THE SAMSON AREA
Jan 2, 7:10 PM CSTTSTM WND DMGGeneva, ALTREES DOWN IN THE GENEVA AREA
Jan 2, 7:13 PM CSTTSTM WND DMGCoffee Springs, ALTREES DOWN IN THE COFFEE SPRINGS AREA

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

The watch it was issued in

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

IssuedProductOfficeLasted
Jan 2, 3:46 PM CSTTornado WatchSPC8 hr

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 0.4 hours before the alert went out and 183 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-pSkew-T log-p diagram, Tallahassee Rgnl, FL at 00:00Z on 2017-01-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 202 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tallahassee Rgnl, FL at 00:00Z on 2017-01-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 138 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
202 J/kg
Mixed-layer CIN
-97 J/kg
Mixed-layer LCL
638 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
138 m²/s²
0-3 km storm-relative helicity
182 m²/s²
Significant tornado parameter
0.1
Supercell composite
3.4

Open this sounding in Storm Lab

The text

As transmitted.

781 
WUUS52 KTAE 030025
SVRTAE
ALC031-061-FLC005-059-131-133-030145-
/O.NEW.KTAE.SV.W.0002.170103T0025Z-170103T0145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tallahassee FL
625 PM CST MON JAN 2 2017

The National Weather Service in Tallahassee has issued a

* Severe Thunderstorm Warning for...
  Southern Coffee County in southeastern Alabama...
  Western Geneva County in southeastern Alabama...
  Western Holmes County in the Panhandle of Florida...
  Northwestern Bay County in the Panhandle of Florida...
  Walton County in the Panhandle of Florida...
  Western Washington County in the Panhandle of Florida...

* Until 745 PM CST

* At 624 PM CST, severe thunderstorms were located along a line
  extending from near Heath to near Crestview to Navarre Beach,
  moving southeast at 50 mph.

  HAZARD...70 mph wind gusts. 

  SOURCE...Radar indicated. 

  IMPACT...Expect considerable tree damage. Damage is likely to 
           mobile homes, roofs, and outbuildings. 

* Locations impacted include...
  Panama City Beach, Elba, Geneva, De Funiak Springs, Santa Rosa
  Beach, Enterprise, Fort Rucker, Samson, New Brockton, Eglin Air
  Force Base, Union, Liberty, Live Oak, Freeport, Paxton, Ponce De
  Leon, Kinston, Caryville, Westville and Ebro.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

A tornado watch remains in effect until 1000 PM CST for southeastern
Alabama...and the Panhandle of Florida.

LAT...LON 3039 8639 3038 8633 3042 8631 3039 8626
      3040 8623 3042 8627 3038 8616 3039 8611
      3044 8616 3047 8613 3046 8619 3050 8620
      3046 8639 3099 8639 3100 8619 3145 8619
      3143 8579 3069 8578 3015 8585 3030 8639
TIME...MOT...LOC 0024Z 298DEG 45KT 3135 8644 3078 8660 3039 8688 

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...70MPH
 
$$

ADL

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 2, 6:40 PM CSTSpecial Marine WarningTAE95 min
Jan 2, 7:05 PM CSTSevere Thunderstorm WarningTAEBay, Calhoun, Holmes, Jackson, Washington55 min
Jan 2, 7:13 PM CSTFlash Flood WarningTAEHolmes, Jackson, Washington3 hr
Jan 2, 7:45 PM CSTSevere Thunderstorm WarningTAEJackson60 min
Jan 2, 7:57 PM CSTSevere Thunderstorm WarningTAEBay, Calhoun, Gadsden, Jackson, Liberty, Washington63 min
Jan 2, 8:06 PM CSTSpecial Marine WarningTAE84 min
Jan 2, 8:45 PM CSTSevere Thunderstorm WarningTAEGadsden, Liberty45 min
Jan 2, 10:18 PM CSTSevere Thunderstorm WarningTAEWalton, Washington27 min
Jan 2, 10:20 PM CSTTornado WarningTAELiberty40 min
Jan 3, 1:30 AM CSTSpecial Marine WarningTAE60 min
Jan 3, 4:09 AM CSTSpecial Marine WarningTAE66 min
Jan 3, 2:36 PM CSTRiver Flood WarningTAECalhoun, Franklin, Gulf, Liberty7 days
Jan 2, 7:33 PM CSTTornado WarningTAEGeneva, Houston27 min
Jan 2, 7:46 PM CSTTornado Warning Tornado observedTAEHouston29 min

Nearby

Severe Thunderstorm Warnings in Florida, 2017Severe Thunderstorm Warnings in Alabama, 2017Every 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.