Alert archive / Florida / Mesoscale Discussions in 2005

Mesoscale Discussion 239

February 27, 200519 counties in Florida

The Storm Prediction Center issued this mesoscale discussion at Feb 27, 2005, 1:08 PM EST for 19 counties in Florida. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Feb 27, 2005, 1:08 PM EST (18:08 UTC)
Expired: Feb 27, 2005, 3:15 PM EST
In force: 2 hr
Issued by: the Storm Prediction Center

Counties Brevard County, FL, Charlotte County, FL, DeSoto County, FL, Glades County, FL, Hardee County, FL, Hernando County, FL, Highlands County, FL, Hillsborough County, FL, Lake County, FL, Manatee County, FL, Okeechobee County, FL, Orange County, FL, Osceola County, FL, Pasco County, FL, Polk County, FL, Sarasota County, FL, Seminole County, FL, Sumter County, FL, Volusia County, FL

The radar

The Tampa radar (KTBW), 84 km from the middle of the area, began a volume at 18:12 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

Tampa Bay, FL (KTBW), launched 12:00Z, 6.1 hours before the alert went out and 84 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: 40 J/kg
Mixed-layer CIN: -60 J/kg
Mixed-layer LCL: 606 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 2 m²/s²
0-3 km storm-relative helicity: 144 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 27, 9:01 AM EST	Mesoscale Discussion	SPC	Hardee, Hillsborough, Manatee, Pinellas, Sarasota	119 min
Feb 27, 10:40 AM EST	Tornado Watch	SPC	Brevard, Charlotte, DeSoto, Glades, Hardee, Hernando and 15 more	7 hr
Feb 27, 11:40 AM EST	Mesoscale Discussion	SPC	Broward, Collier, Hendry, Miami-Dade, Monroe, Palm Beach	2 hr
Feb 27, 4:29 PM EST	Mesoscale Discussion	SPC	Brevard, Charlotte, DeSoto, Glades, Hardee, Highlands and 12 more	91 min

Nearby

Mesoscale Discussions in Florida, 2005 Every mesoscale discussion in 2005

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.