Alert archive / Florida / Mesoscale Discussions in 2005

Mesoscale Discussion 735

May 4, 200514 counties in Florida

The Storm Prediction Center issued this mesoscale discussion at May 4, 2005, 4:24 PM EDT for 14 counties in Florida. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: May 4, 2005, 4:24 PM EDT (20:24 UTC)
Expired: May 4, 2005, 6:30 PM EDT
In force: 2 hr
Issued by: the Storm Prediction Center

Counties Brevard County, FL, Broward County, FL, Collier County, FL, Glades County, FL, Hendry County, FL, Indian River County, FL, Martin County, FL, Miami-Dade County, FL, Monroe County, FL, Okeechobee County, FL, Orange County, FL, Osceola County, FL, Palm Beach County, FL, Saint Lucie County, FL

The radar

The Melbourne radar (KMLB), 145 km from the middle of the area, began a volume at 20:24 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

Miami, FL (KMFL), launched 12:00Z, 8.4 hours before the alert went out and 139 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: 1152 J/kg
Mixed-layer CIN: -62 J/kg
Mixed-layer LCL: 905 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 23 m²/s²
0-3 km storm-relative helicity: 79 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

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
May 4, 6:30 AM EDT	Mesoscale Discussion	SPC	Alachua, Bradford, Brevard, Citrus, Clay, Flagler and 16 more	3 hr
May 4, 8:50 AM EDT	Severe Thunderstorm Watch	SPC	Brevard, Charlotte, Citrus, DeSoto, Flagler, Glades and 22 more	7 hr
May 4, 11:45 AM EDT	Mesoscale Discussion	SPC	Brevard, Charlotte, Citrus, DeSoto, Flagler, Glades and 19 more	2 hr
May 4, 12:11 PM EDT	Mesoscale Discussion	SPC	Broward, Collier, Hendry, Miami-Dade, Monroe, Palm Beach	2 hr
May 4, 1:30 PM EDT	Severe Thunderstorm Watch	SPC	Brevard, Broward, Charlotte, Citrus, Collier, DeSoto and 27 more	7 hr
May 4, 6:54 PM EDT	Mesoscale Discussion	SPC	Broward, Collier, Hendry, Miami-Dade, Monroe, Palm Beach	66 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.