Alert archive / Florida / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 27, NWS Tallahassee, FL

March 2, 2019Calhoun County, Gadsden County, Liberty County, Florida

NWS Tallahassee, FL issued this severe thunderstorm warning at Mar 2, 2019, 4:41 AM CST for Calhoun County, Gadsden County, Liberty County, Florida. It was in force for 49 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: Mar 2, 2019, 4:41 AM CST (10:41 UTC)
Expired: Mar 2, 2019, 5:30 AM CST
In force: 49 min
Issued by: NWS Tallahassee, FL
Area: Storm-based polygon

Counties Calhoun County, FL, Gadsden County, FL, Liberty County, FL

The radar

The Tallahassee radar (KTLH), 55 km from the middle of the area, began a volume at 10:44 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 00:00Z, 10.7 hours before the alert went out and 57 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: 17 J/kg
Mixed-layer CIN: -139 J/kg
Mixed-layer LCL: 1015 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 128 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Mar 2, 1:31 AM CST, 3 hours 10 minutes earlier.

Area forecast discussion, Mar 2, 1:31 AM CST, 3 hours 10 minutes before

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In the hours before

Special weather statement, Mar 2, 3:55 AM CST, 46 minutes before

Special Weather Statement
National Weather Service Tallahassee FL
455 AM EST SAT MAR 2 2019

ALZ069-FLZ010-011-GAZ155-156-021045-
Houston AL-Jackson FL-Washington FL-Decatur GA-Seminole GA-
455 AM EST SAT MAR 2 2019

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN HOUSTON...JACKSON...
NORTHEASTERN WASHINGTON...SOUTHWESTERN DECATUR AND SEMINOLE COUNTIES
UNTIL 545 AM EST/445 AM CST/...

At 455 AM EST/355 AM CST/, Doppler radar was tracking a strong
thunderstorm over Chipley, moving northeast at 30 mph.

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

Locations impacted include...
Cottonwood, Chipley, Donalsonville, Marianna, Chattahoochee, Malone,
Sneads, Cottondale, Grand Ridge, Greenwood, Alford, Iron City,
Campbellton, Bascom, Crosby, Grangeburg, Lovedale, Dellwood,
Donaldsonville A/P and Bahoma.

LAT...LON 3082 8560 3114 8526 3111 8503 3107 8503
      3107 8481 3106 8474 3075 8484 3074 8486
      3071 8485 3061 8514 3061 8517 3060 8517
      3056 8526 3057 8528 3079 8561
TIME...MOT...LOC 0955Z 241DEG 28KT 3076 8550

30-PULLIN

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 2, 3:55 AM CST	Special Weather Statement	TAE	Jackson	50 min
Mar 2, 4:12 AM CST	Severe Thunderstorm Warning	TAE	Bay, Calhoun	33 min
Mar 2, 5:49 AM CST	Special Weather Statement	TAE	Leon	41 min
Mar 2, 5:57 AM CST	Severe Thunderstorm Warning	TAE	Gadsden, Leon	48 min
Mar 2, 6:38 AM CST	Special Weather Statement	TAE	Jefferson	37 min
Mar 2, 7:14 AM CST	Special Weather Statement	TAE	Jefferson	31 min
Mar 2, 2:19 PM CST	Special Weather Statement	TAE	Washington	26 min
Mar 2, 2:59 PM CST	Special Weather Statement	TAE	Washington	46 min
Mar 2, 4:55 PM CST	Special Weather Statement	TAE	Brooks, Lowndes	50 min

Nearby

Severe Thunderstorm Warnings in Florida, 2019 Every severe thunderstorm warning in 2019

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.