Alert archive / Florida / Mesoscale Discussions in 2016

Mesoscale Discussion 140

February 24, 201617 counties in Florida

The Storm Prediction Center issued this mesoscale discussion at Feb 24, 2016, 8:36 AM EST for 17 counties in Florida. It was in force for 84 min.

The area

The outline as issued.

The facts

Issued: Feb 24, 2016, 8:36 AM EST (13:36 UTC)
Expired: Feb 24, 2016, 10:00 AM EST
In force: 84 min
Issued by: the Storm Prediction Center

Counties Charlotte County, FL, Clay County, FL, DeSoto County, FL, Hardee County, FL, Hernando County, FL, Highlands County, FL, Hillsborough County, FL, Lake County, FL, Manatee County, FL, Marion County, FL, Orange County, FL, Pasco County, FL, Polk County, FL, Putnam County, FL, Saint Johns County, FL, Sarasota County, FL, Sumter County, FL

The radar

The Tampa radar (KTBW), 62 km from the middle of the area, began a volume at 13:38 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

Tampa Bay, FL (KTBW), launched 12:00Z, 1.6 hours before the alert went out and 62 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: 575 J/kg
Mixed-layer CIN: -46 J/kg
Mixed-layer LCL: 715 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 415 m²/s²
0-3 km storm-relative helicity: 439 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 8.9

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 23, 7:51 PM EST	Mesoscale Discussion	SPC	Escambia	54 min
Feb 23, 9:08 PM EST	Tornado Watch	SPC	Bay, Calhoun, Dixie, Escambia, Franklin, Gadsden and 14 more	9 hr
Feb 23, 10:07 PM EST	Mesoscale Discussion	SPC	Bay, Holmes, Jackson, Okaloosa, Walton, Washington	53 min
Feb 24, 1:44 AM EST	Mesoscale Discussion	SPC	Franklin, Gadsden, Hamilton, Jefferson, Leon, Liberty and 2 more	2 hr
Feb 24, 3:58 AM EST	Tornado Watch	SPC	Alachua, Baker, Bradford, Citrus, Columbia, Gilchrist and 12 more	6 hr
Feb 24, 6:48 AM EST	Mesoscale Discussion	SPC	Alachua, Baker, Bradford, Citrus, Clay, Columbia and 7 more	87 min
Feb 24, 11:42 AM EST	Mesoscale Discussion	SPC	Brevard, Charlotte, Collier, DeSoto, Glades, Hardee and 18 more	63 min

Nearby

Mesoscale Discussions in Florida, 2016 Every mesoscale discussion 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.