Alert archive / Florida / Mesoscale Discussions in 2010

Mesoscale Discussion 101

February 5, 201020 counties in Florida

The Storm Prediction Center issued this mesoscale discussion at Feb 5, 2010, 1:27 PM EST for 20 counties in Florida. It was in force for 63 min.

The area

The outline as issued.

The facts

Issued: Feb 5, 2010, 1:27 PM EST (18:27 UTC)
Expired: Feb 5, 2010, 2:30 PM EST
In force: 63 min
Issued by: the Storm Prediction Center

Counties Charlotte County, FL, Citrus County, FL, Collier County, FL, DeSoto County, FL, Glades County, FL, Hardee County, FL, Hernando County, FL, Highlands County, FL, Hillsborough County, FL, Lake County, FL, Lee County, FL, Manatee County, FL, Marion County, FL, Orange County, FL, Osceola County, FL, Pasco County, FL, Pinellas County, FL, Polk County, FL, Sarasota County, FL, Sumter County, FL

The radar

The Tampa radar (KTBW), 56 km from the middle of the area, began a volume at 18:28 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Tornado Watch 15Feb 5, 2:05 PM EST

The nearest sounding before it

Tampa Bay, FL (KTBW), launched 12:00Z, 6.5 hours before the alert went out and 56 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: 20 J/kg
Mixed-layer CIN: -50 J/kg
Mixed-layer LCL: 575 m above ground
0-6 km bulk shear: 70 kt
0-1 km storm-relative helicity: 366 m²/s²
0-3 km storm-relative helicity: 414 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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
Feb 5, 2:02 PM EST	Tornado Watch	SPC	Brevard, Charlotte, Citrus, Collier, DeSoto, Glades and 21 more	6 hr
Feb 5, 4:57 PM EST	Mesoscale Discussion	SPC	Brevard, Broward, Collier, Glades, Hendry, Highlands and 8 more	63 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.