Alert archive / Florida / Mesoscale Discussions in 2003

Mesoscale Discussion 443

April 7, 20038 counties in Florida; Saint Bernard Parish, Louisiana

The Storm Prediction Center issued this mesoscale discussion at Apr 7, 2003, 8:13 PM CDT for 8 counties in Florida; Saint Bernard Parish, Louisiana. It was in force for 62 min.

The area

The outline as issued.

The facts

Issued: Apr 7, 2003, 8:13 PM CDT (01:13 UTC)
Expired: Apr 7, 2003, 9:15 PM CDT
In force: 62 min
Issued by: the Storm Prediction Center

Counties Calhoun County, FL, Escambia County, FL, Gadsden County, FL, Jackson County, FL, Okaloosa County, FL, Santa Rosa County, FL, Walton County, FL, Washington County, FL, Saint Bernard Parish, LA

The radar

The Mobile radar (KMOB), 102 km from the middle of the area, began a volume at 01:14 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

Slidell Radar S, LA (KSIL), launched 00:00Z, 1.2 hours before the alert went out and 229 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1033 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: -153 m²/s²
0-3 km storm-relative helicity: 91 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
Apr 8, 10:32 AM CDT	Mesoscale Discussion	SPC	Alachua, Bradford, Clay, Dixie, Flagler, Franklin and 9 more	3 hr
Apr 8, 12:00 PM CDT	Severe Thunderstorm Watch	SPC	Alachua, Baker, Bradford, Clay, Columbia, Dixie and 15 more	5 hr
Apr 8, 1:32 PM CDT	Mesoscale Discussion	SPC	Alachua, Bradford, Clay, Dixie, Flagler, Franklin and 9 more	118 min
Apr 8, 3:51 PM CDT	Mesoscale Discussion	SPC	Alachua, Bradford, Clay, Dixie, Flagler, Franklin and 9 more	114 min

Nearby

Mesoscale Discussions in Florida, 2003 Mesoscale Discussions in Louisiana, 2003 Every mesoscale discussion in 2003

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.