Alert archive / Alabama / Mesoscale Discussions in 2003

Mesoscale Discussion 2459

October 26, 20036 counties in Alabama; Escambia County, Santa Rosa County, Florida

The Storm Prediction Center issued this mesoscale discussion at Oct 26, 2003, 5:24 AM CST for 6 counties in Alabama; Escambia County, Santa Rosa County, Florida. It was in force for 96 min.

The area

The outline as issued.

The facts

Issued: Oct 26, 2003, 5:24 AM CST (11:24 UTC)
Expired: Oct 26, 2003, 7:00 AM CST
In force: 96 min
Issued by: the Storm Prediction Center

Counties Baldwin County, AL, Conecuh County, AL, Covington County, AL, Escambia County, AL, Mobile County, AL, Monroe County, AL, Escambia County, FL, Santa Rosa County, FL

The radar

The Mobile radar (KMOB), 44 km from the middle of the area, began a volume at 11:27 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 940Oct 26, 6:05 AM CST

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 11.4 hours before the alert went out and 191 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: 1569 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 767 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 94 m²/s²
0-3 km storm-relative helicity: 95 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 7.4

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
Oct 26, 1:40 AM CDT	Mesoscale Discussion	SPC	Choctaw	95 min
Oct 26, 2:00 AM CST	Tornado Watch	SPC	Baldwin, Conecuh, Escambia, Mobile, Monroe, Washington	5 hr
Oct 26, 6:05 AM CST	Tornado Watch	SPC	Autauga, Barbour, Bullock, Butler, Coffee, Conecuh and 14 more	5 hr
Oct 26, 9:23 AM CST	Mesoscale Discussion	SPC	Barbour, Bullock, Chambers, Coffee, Covington, Crenshaw and 11 more	67 min

Nearby

Mesoscale Discussions in Alabama, 2003 Mesoscale Discussions in Florida, 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.