Alert archive / Georgia / Mesoscale Discussions in 2007

Mesoscale Discussion 604

April 26, 20074 states

The Storm Prediction Center issued this mesoscale discussion at Apr 26, 2007, 7:26 PM CDT for 4 states. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued: Apr 26, 2007, 7:26 PM CDT (00:26 UTC)
Expired: Apr 26, 2007, 9:00 PM CDT
In force: 94 min
Issued by: the Storm Prediction Center

All 27 counties

Cherokee County, AL, DeKalb County, AL, Etowah County, AL, Jackson County, AL, Marshall County, AL, Bartow County, GA, Catoosa County, GA, Chattooga County, GA, Cherokee County, GA, Dade County, GA, Dawson County, GA, Fannin County, GA, Floyd County, GA, Gilmer County, GA, Gordon County, GA, Lumpkin County, GA, Murray County, GA, Pickens County, GA, Union County, GA, Walker County, GA, Whitfield County, GA, Cherokee County, NC, Graham County, NC, Bradley County, TN, Hamilton County, TN, Marion County, TN, Polk County, TN

The radar

The Northeast Alabama radar (KHTX), 115 km from the middle of the area, began a volume at 00:26 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

Nashville Metro, TN (KBNA), launched 00:00Z, 0.4 hours before the alert went out and 233 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: 162 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 1407 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 48 m²/s²
0-3 km storm-relative helicity: 164 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

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
Apr 27, 10:29 AM CDT	Mesoscale Discussion	SPC	Beaufort, Bertie, Bladen, Brunswick, Camden, Carteret and 36 more	61 min
Apr 27, 11:01 AM CDT	Severe Thunderstorm Watch	SPC	Beaufort, Bertie, Camden, Carteret, Chowan, Craven and 31 more	5 hr
Apr 27, 2:33 PM CDT	Mesoscale Discussion	SPC	Beaufort, Bertie, Camden, Chowan, Craven, Currituck and 29 more	117 min

Nearby

Mesoscale Discussions in Georgia, 2007 Mesoscale Discussions in Alabama, 2007 Mesoscale Discussions in Tennessee, 2007 Every mesoscale discussion in 2007

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.