Alert archive / Florida / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 261, NWS Tallahassee, FL

July 31, 2016Jackson County, Florida

NWS Tallahassee, FL issued this severe thunderstorm warning at Jul 31, 2016, 3:39 PM CDT for Jackson County, Florida. It was in force for 36 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 31, 2016, 3:39 PM CDT (20:39 UTC)
Expired: Jul 31, 2016, 4:15 PM CDT
In force: 36 min
Issued by: NWS Tallahassee, FL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Jackson County, FL

The radar

The Eglin Afb radar (KEVX), 58 km from the middle of the area, began a volume at 20:40 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 nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 8.7 hours before the alert went out and 116 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: 1583 J/kg
Mixed-layer CIN: -22 J/kg
Mixed-layer LCL: 907 m above ground
0-6 km bulk shear: 2 kt
0-1 km storm-relative helicity: -7 m²/s²
0-3 km storm-relative helicity: -1 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

418 
WUUS52 KTAE 312039
SVRTAE
FLC063-312115-
/O.NEW.KTAE.SV.W.0261.160731T2039Z-160731T2115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TALLAHASSEE FL
339 PM CDT SUN JUL 31 2016

THE NATIONAL WEATHER SERVICE IN TALLAHASSEE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN JACKSON COUNTY IN FLORIDA...

* UNTIL 415 PM CDT

* AT 338 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 9 MILES NORTHWEST
  OF MARIANNA...AND IS NEARLY STATIONARY.

  HAZARD...60 MPH WIND GUSTS AND PENNY SIZE HAIL. 

  SOURCE...RADAR INDICATED. 

  IMPACT...EXPECT DAMAGE TO ROOFS...SIDING...AND TREES. 

* LOCATIONS IMPACTED INCLUDE...
  MARIANNA...COTTONDALE...ALFORD...CAMPBELLTON...SILLS...JACOBS...
  COTTONDALE AIRPORT...JACOB CITY...STEELE CITY AND KYNESVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 3093 8550 3097 8526 3068 8523 3070 8543
      3078 8543 3079 8546
TIME...MOT...LOC 2038Z 260DEG 2KT 3086 8536 

HAIL...0.75IN
WIND...60MPH
 
$$

JLF

1 follow-up statement

185 
WWUS52 KTAE 312113
SVSTAE

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
413 PM CDT SUN JUL 31 2016

FLC063-312122-
/O.EXP.KTAE.SV.W.0261.000000T0000Z-160731T2115Z/
JACKSON FL-
413 PM CDT SUN JUL 31 2016

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN JACKSON COUNTY
WILL EXPIRE AT 415 PM CDT...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSE AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
THEREFORE...THE WARNING WILL BE ALLOWED TO EXPIRE.

LAT...LON 3093 8550 3097 8526 3068 8523 3070 8543
      3078 8543 3079 8546
TIME...MOT...LOC 2110Z 260DEG 2KT 3086 8536 

$$

JLF

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 31, 4:31 AM CDT	Special Marine Warning	TAE		119 min
Jul 31, 12:44 PM CDT	Special Marine Warning	TAE		31 min
Jul 31, 1:14 PM CDT	Special Marine Warning	TAE		46 min
Jul 31, 1:30 PM CDT	Severe Thunderstorm Warning	TAE	Bay, Calhoun, Gulf	30 min
Jul 31, 3:21 PM CDT	Severe Thunderstorm Warning	TAE	Gadsden	39 min
Jul 31, 3:44 PM CDT	Severe Thunderstorm Warning	TAE	Leon	46 min
Jul 31, 4:56 PM CDT	Areal Flood Warning	TAE	Holmes, Jackson	2 hr
Jul 31, 5:32 PM CDT	Special Weather Statement	TAE	Walton	43 min

Nearby

Severe Thunderstorm Warnings in Florida, 2016 Every severe thunderstorm warning in 2016

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.