Alert archive / Florida / Mesoscale Discussions in 2005

Mesoscale Discussion 1709

July 9, 200514 counties in Florida

The Storm Prediction Center issued this mesoscale discussion at Jul 9, 2005, 11:50 AM EDT for 14 counties in Florida. It was in force for 115 min.

The area

The outline as issued.

The facts

Issued: Jul 9, 2005, 11:50 AM EDT (15:50 UTC)
Expired: Jul 9, 2005, 1:45 PM EDT
In force: 115 min
Issued by: the Storm Prediction Center

Counties Broward County, FL, Charlotte County, FL, Collier County, FL, DeSoto County, FL, Glades County, FL, Hardee County, FL, Hendry County, FL, Highlands County, FL, Hillsborough County, FL, Lee County, FL, Manatee County, FL, Miami-Dade County, FL, Monroe County, FL, Sarasota County, FL

The radar

The Miami radar (KAMX), 137 km from the middle of the area, began a volume at 15:50 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 628Jul 9, 3:05 PM EDT

The nearest sounding before it

Miami, FL (KMFL), launched 12:00Z, 3.8 hours before the alert went out and 136 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: 1531 J/kg
Mixed-layer CIN: -11 J/kg
Mixed-layer LCL: 807 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 219 m²/s²
0-3 km storm-relative helicity: 314 m²/s²
Significant tornado parameter: 1.6
Supercell composite: 13.8

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
Jul 8, 8:25 PM EDT	Mesoscale Discussion	SPC	Broward, Collier, Hendry, Lee, Miami-Dade, Monroe	2 hr
Jul 8, 9:55 PM EDT	Tornado Watch	SPC	Broward, Charlotte, Collier, DeSoto, Glades, Hardee and 11 more	9 hr
Jul 9, 6:45 AM EDT	Tornado Watch	SPC	Brevard, Broward, Charlotte, Citrus, Collier, DeSoto and 27 more	8 hr
Jul 9, 3:05 PM EDT	Tornado Watch	SPC	Alachua, Charlotte, Citrus, Collier, DeSoto, Dixie and 21 more	8 hr
Jul 9, 6:13 PM EDT	Mesoscale Discussion	SPC	Alachua, Charlotte, Citrus, Collier, Columbia, DeSoto and 27 more	2 hr

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.