Alert archive / Florida / Mesoscale Discussions in 2022

Mesoscale Discussion 263

March 16, 202212 counties in Florida

The Storm Prediction Center issued this mesoscale discussion at Mar 16, 2022, 12:47 PM EDT for 12 counties in Florida. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued: Mar 16, 2022, 12:47 PM EDT (16:47 UTC)
Expired: Mar 16, 2022, 2:15 PM EDT
In force: 88 min
Issued by: the Storm Prediction Center
Concerning: Severe potential...watch possible
Chance of a watch: 60%

Counties Brevard County, FL, Flagler County, FL, Lake County, FL, Marion County, FL, Orange County, FL, Osceola County, FL, Polk County, FL, Putnam County, FL, Saint Johns County, FL, Seminole County, FL, Sumter County, FL, Volusia County, FL

The radar

The Melbourne radar (KMLB), 94 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 47Mar 16, 1:20 PM EDT

The nearest sounding before it

Cape Canaveral, FL (KXMR), launched 12:00Z, 4.8 hours before the alert went out and 81 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: 389 J/kg
Mixed-layer CIN: -88 J/kg
Mixed-layer LCL: 915 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 45 m²/s²
0-3 km storm-relative helicity: 69 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.9

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 15, 10:53 PM EDT	Mesoscale Discussion	SPC	Hillsborough, Lake, Manatee, Orange, Osceola, Polk and 3 more	2 hr
Mar 16, 1:26 PM EDT	Severe Thunderstorm Watch	SPC	Brevard, DeSoto, Flagler, Hardee, Highlands, Indian River and 12 more	7 hr
Mar 16, 1:53 PM EDT	Mesoscale Discussion	SPC	Broward, Miami-Dade, Palm Beach	2 hr
Mar 16, 4:53 PM EDT	Mesoscale Discussion	SPC	Brevard, DeSoto, Glades, Hardee, Highlands, Hillsborough and 11 more	97 min

Nearby

Mesoscale Discussions in Florida, 2022 Every mesoscale discussion in 2022

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.