Alert archive / Florida / Mesoscale Discussions in 2010

Mesoscale Discussion 64

January 25, 201028 counties in Florida

The Storm Prediction Center issued this mesoscale discussion at Jan 25, 2010, 2:44 AM EST for 28 counties in Florida. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jan 25, 2010, 2:44 AM EST (07:44 UTC)
Expired: Jan 25, 2010, 4:45 AM EST
In force: 2 hr
Issued by: the Storm Prediction Center

All 28 counties

Alachua County, FL, Bradford County, FL, Charlotte County, FL, Citrus County, FL, Clay County, FL, DeSoto County, FL, Duval County, FL, Flagler County, FL, Hardee County, FL, Hernando County, FL, Highlands County, FL, Hillsborough County, FL, Lake County, FL, Lee County, FL, Levy County, FL, Manatee County, FL, Marion County, FL, Orange County, FL, Osceola County, FL, Pasco County, FL, Pinellas County, FL, Polk County, FL, Putnam County, FL, Saint Johns County, FL, Sarasota County, FL, Seminole County, FL, Sumter County, FL, Volusia County, FL

The radar

The Tampa radar (KTBW), 60 km from the middle of the area, began a volume at 07:46 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 00:00Z, 7.7 hours before the alert went out and 60 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: 255 J/kg
Mixed-layer CIN: -16 J/kg
Mixed-layer LCL: 1027 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 264 m²/s²
0-3 km storm-relative helicity: 342 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 2.6

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jan 24, 8:55 PM EST	Mesoscale Discussion	SPC	Gadsden, Hamilton, Jefferson, Leon, Madison, Taylor and 1 more	95 min
Jan 25, 7:38 AM EST	Mesoscale Discussion	SPC	Brevard, Broward, Collier, Glades, Hendry, Highlands and 9 more	3 hr
Jan 25, 11:54 AM EST	Mesoscale Discussion	SPC	Broward, Martin, Miami-Dade, Monroe, Palm Beach	66 min

Nearby

Mesoscale Discussions in Florida, 2010 Every mesoscale discussion in 2010

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.