Alert archive / Florida / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 196, NWS Tallahassee, FL

July 22, 20208 counties in Florida; Decatur County, Seminole County, Georgia

NWS Tallahassee, FL issued this severe thunderstorm warning at Jul 22, 2020, 4:10 PM CDT for 8 counties in Florida; Decatur County, Seminole County, Georgia. It was in force for 80 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: Jul 22, 2020, 4:10 PM CDT (21:10 UTC)
Expired: Jul 22, 2020, 5:30 PM CDT
In force: 80 min
Issued by: NWS Tallahassee, FL
Area: Storm-based polygon

Counties Calhoun County, FL, Franklin County, FL, Gadsden County, FL, Gulf County, FL, Jackson County, FL, Leon County, FL, Liberty County, FL, Wakulla County, FL, Decatur County, GA, Seminole County, GA

The radar

The Tallahassee radar (KTLH), 46 km from the middle of the area, began a volume at 21:12 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, 9.2 hours before the alert went out and 49 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: 38 J/kg
Mixed-layer CIN: -154 J/kg
Mixed-layer LCL: 1298 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: -51 m²/s²
0-3 km storm-relative helicity: -40 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 Jul 22, 2:37 PM CDT, 1 hour 33 minutes earlier.

Area forecast discussion, Jul 22, 2:37 PM CDT, 1 hour 33 minutes before

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In the hours before

Local storm report, Jul 22, 1:54 PM CDT, 2 hours 16 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
254 PM EDT WED JUL 22 2020

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

0154 PM     MARINE TSTM WIND 2 ESE MAGNOLIA BEACH    30.15N 85.70W
07/22/2020  E40 MPH          GMZ750             FL   BUOY

            MEASURED 40 MPH GUST AT PACF1 BUOY.

&&

EB

Local storm report, Jul 22, 2:04 PM CDT, 2 hours 6 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
304 PM EDT WED JUL 22 2020

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

0206 PM     TSTM WND DMG     1 N GULF LAGOON BEACH   30.18N 85.79W
07/22/2020                   BAY                FL   LAW ENFORCEMENT

            TREE DOWN ON ALLISON AVENUE.

&&

LF

Special weather statement, Jul 22, 2:21 PM CDT, 1 hour 49 minutes before

Special Weather Statement
National Weather Service Tallahassee FL
321 PM EDT Wed Jul 22 2020

FLZ028-034-128-134-222000-
Inland Taylor FL-Coastal Dixie FL-Inland Dixie FL-Coastal Taylor FL-
321 PM EDT Wed Jul 22 2020

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL DIXIE AND SOUTHEASTERN
TAYLOR COUNTIES UNTIL 400 PM EDT...

At 321 PM EDT, Doppler radar was tracking a strong thunderstorm near
Steinhatchee, moving northwest at 25 mph.

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

Locations impacted include...
Cross City, Steinhatchee, Tennille, Fish Creek, Shamrock, Howell
Place, Clara, Cross City Airport, Jena, Hines, Jonesboro, Bird
Island, Eugene and Cedar Island.

LAT...LON 2945 8305 2957 8347 2964 8347 2978 8366
      2982 8367 2980 8327 2968 8303
TIME...MOT...LOC 1921Z 114DEG 22KT 2964 8330

42-DVD

Local storm report, Jul 22, 2:59 PM CDT, 1 hour 11 minutes before

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Local storm report, Jul 22, 3:52 PM CDT, 18 minutes before

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Local storm report, Jul 22, 4:08 PM CDT, 2 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 22, 2:39 AM CDT	Rip Current Statement	TAE	Bay, Franklin, Gulf, Walton	4 days
Jul 22, 12:47 PM CDT	Special Marine Warning	TAE		58 min
Jul 22, 12:48 PM CDT	Special Weather Statement	TAE	Bay	27 min
Jul 22, 12:57 PM CDT	Severe Thunderstorm Warning	TAE	Bay	48 min
Jul 22, 1:30 PM CDT	Special Weather Statement	TAE	Walton	45 min
Jul 22, 1:33 PM CDT	Special Marine Warning	TAE		42 min
Jul 22, 1:36 PM CDT	Special Weather Statement	TAE	Lafayette	54 min
Jul 22, 1:58 PM CDT	Special Marine Warning	TAE		3 hr
Jul 22, 2:06 PM CDT	Severe Thunderstorm Warning	TAE	Lafayette, Taylor	69 min
Jul 22, 2:21 PM CDT	Special Weather Statement	TAE	Dixie	39 min
Jul 22, 2:57 PM CDT	Severe Thunderstorm Warning	TAE	Franklin, Gadsden, Jefferson, Leon, Liberty, Madison and 1 more	93 min
Jul 22, 3:08 PM CDT	Special Marine Warning	TAE		2 hr
Jul 22, 4:24 PM CDT	Special Weather Statement	TAE	Bay, Gulf	51 min
Jul 22, 4:58 PM CDT	Special Marine Warning	TAE		2 hr
Jul 22, 5:06 PM CDT	Severe Thunderstorm Warning	TAE	Bay, Calhoun, Gulf, Holmes, Jackson, Washington	69 min
Jul 22, 5:47 PM CDT	Severe Thunderstorm Warning	TAE	Bay, Holmes, Walton, Washington	88 min
Jul 22, 5:50 PM CDT	Special Weather Statement	TAE	Geneva, Houston	40 min
Jul 22, 6:18 PM CDT	Special Weather Statement	TAE	Coffee, Dale, Henry	42 min

Nearby

Severe Thunderstorm Warnings in Florida, 2020 Severe Thunderstorm Warnings in Georgia, 2020 Every severe thunderstorm warning in 2020

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.