Alert archive / Florida / Mesoscale Discussions in 2016

Mesoscale Discussion 247

March 19, 201613 counties in Florida

The Storm Prediction Center issued this mesoscale discussion at Mar 19, 2016, 12:50 PM EDT for 13 counties in Florida. It was in force for 115 min.

The area

The outline as issued.

The facts

Issued: Mar 19, 2016, 12:50 PM EDT (16:50 UTC)
Expired: Mar 19, 2016, 2:45 PM EDT
In force: 115 min
Issued by: the Storm Prediction Center
Chance of a watch: 40%

Counties Charlotte County, FL, DeSoto County, FL, Glades County, FL, Hardee County, FL, Hendry County, FL, Highlands County, FL, Indian River County, FL, Lee County, FL, Martin County, FL, Okeechobee County, FL, Palm Beach County, FL, Saint Lucie County, FL, Sarasota County, FL

The radar

The Tampa radar (KTBW), 117 km from the middle of the area, began a volume at 16:49 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.

Severe Thunderstorm Watch 50Mar 19, 1:15 PM EDT

The nearest sounding before it

Miami, FL (KMFL), launched 12:00Z, 4.8 hours before the alert went out and 181 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: 185 J/kg
Mixed-layer CIN: -52 J/kg
Mixed-layer LCL: 1139 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: 129 m²/s²
0-3 km storm-relative helicity: 239 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 2.6

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 19, 10:37 AM EDT	Mesoscale Discussion	SPC	Charlotte, DeSoto, Hardee, Hillsborough, Lee, Manatee and 2 more	113 min
Mar 19, 1:20 PM EDT	Severe Thunderstorm Watch	SPC	Broward, Charlotte, Collier, Glades, Hendry, Indian River and 5 more	5 hr
Mar 19, 3:51 PM EDT	Mesoscale Discussion	SPC	Broward, Collier, Glades, Hendry, Indian River, Martin and 4 more	114 min

Nearby

Mesoscale Discussions in Florida, 2016 Every mesoscale discussion in 2016

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.