Alert archive / Georgia / Mesoscale Discussions in 2015

Mesoscale Discussion 1919

November 2, 2015Jackson County, Washington County, Florida; 5 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Nov 2, 2015, 10:21 AM CST for Jackson County, Washington County, Florida; 5 counties in Georgia. It was in force for 54 min.

The area

The outline as issued.

The facts

Issued: Nov 2, 2015, 10:21 AM CST (16:21 UTC)
Expired: Nov 2, 2015, 11:15 AM CST
In force: 54 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

Counties Jackson County, FL, Washington County, FL, Baker County, GA, Dougherty County, GA, Miller County, GA, Mitchell County, GA, Seminole County, GA

The radar

The Ft Rucker radar (KEOX), 74 km from the middle of the area, began a volume at 16:22 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 530Nov 2, 12:15 PM CST

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 4.4 hours before the alert went out and 88 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: 230 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 641 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 123 m²/s²
0-3 km storm-relative helicity: 184 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 3.2

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
Nov 2, 1:28 AM CST	Mesoscale Discussion	SPC	Escambia, Holmes, Okaloosa, Santa Rosa, Walton, Washington	2 hr
Nov 2, 5:46 AM CST	Mesoscale Discussion	SPC	Holmes, Jackson, Walton, Washington	2 hr
Nov 2, 12:15 PM CST	Tornado Watch	SPC	Atkinson, Baker, Ben Hill, Berrien, Bibb, Bleckley and 40 more	6 hr
Nov 2, 1:36 PM CST	Mesoscale Discussion	SPC	Baker, Ben Hill, Berrien, Bibb, Bleckley, Coffee and 33 more	84 min
Nov 2, 3:37 PM CST	Mesoscale Discussion	SPC	Bryan, Bulloch, Candler, Chatham, Effingham, Evans and 2 more	53 min
Nov 2, 5:05 PM CST	Mesoscale Discussion	SPC	Appling, Atkinson, Bacon, Berrien, Bryan, Bulloch and 12 more	115 min

Nearby

Mesoscale Discussions in Georgia, 2015 Mesoscale Discussions in Florida, 2015 Every mesoscale discussion in 2015

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.