Alert archive / Virginia / Mesoscale Discussions in 2007

Mesoscale Discussion 25

January 5, 200726 counties in North Carolina; 28 counties in Virginia

The Storm Prediction Center issued this mesoscale discussion at Jan 5, 2007, 10:16 PM EST for 26 counties in North Carolina; 28 counties in Virginia. It was in force for 89 min.

The area

The outline as issued.

The facts

Issued
Jan 5, 2007, 10:16 PM EST (03:16 UTC)
Expired
Jan 5, 2007, 11:45 PM EST
In force
89 min
Issued by
the Storm Prediction Center
All 54 counties

Beaufort County, NC, Bertie County, NC, Camden County, NC, Chowan County, NC, Craven County, NC, Currituck County, NC, Dare County, NC, Edgecombe County, NC, Franklin County, NC, Gates County, NC, Greene County, NC, Halifax County, NC, Hertford County, NC, Hyde County, NC, Lenoir County, NC, Martin County, NC, Nash County, NC, Northampton County, NC, Pamlico County, NC, Pasquotank County, NC, Perquimans County, NC, Pitt County, NC, Tyrrell County, NC, Warren County, NC, Washington County, NC, Wilson County, NC, Brunswick County, VA, Charles City County, VA, Chesterfield County, VA, City of Chesapeake, VA, City of Colonial Heights, VA, City of Emporia, VA, City of Franklin, VA, City of Hampton, VA, City of Hopewell, VA, City of Newport News, VA, City of Norfolk, VA, City of Petersburg, VA, City of Poquoson, VA, City of Portsmouth, VA, City of Suffolk, VA, City of Virginia Beach, VA, City of Williamsburg, VA, Dinwiddie County, VA, Gloucester County, VA, Greensville County, VA, Henrico County, VA, Isle of Wight County, VA, James City County, VA, Prince George County, VA, Southampton County, VA, Surry County, VA, Sussex County, VA, York County, VA

The radar

The Norfolk radar (KAKQ), 90 km from the middle of the area, began a volume at 03:18 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.

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 00:00Z, 3.3 hours before the alert went out and 240 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-pSkew-T log-p diagram, Wallops Is Stn, VA at 00:00Z on 2007-01-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 23 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Wallops Is Stn, VA at 00:00Z on 2007-01-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 182 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
23 J/kg
Mixed-layer CIN
-212 J/kg
Mixed-layer LCL
559 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
182 m²/s²
0-3 km storm-relative helicity
231 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

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.

IssuedProductOfficeCountiesLasted
Jan 5, 9:01 PM ESTMesoscale DiscussionSPCBeaufort, Bladen, Brunswick, Carteret, Columbus, Craven and 19 more89 min
Jan 6, 12:58 AM ESTTornado WatchSPCCumberland, Durham, Edgecombe, Franklin, Granville, Halifax and 12 more3 hr
Jan 6, 3:11 AM ESTMesoscale DiscussionSPCBertie, Camden, Chowan, Currituck, Gates, Hertford and 4 more64 min
Jan 6, 4:15 AM ESTTornado WatchSPCBertie, Camden, Chowan, Currituck, Gates, Hertford and 2 more107 min
Jan 6, 5:19 AM ESTMesoscale DiscussionSPCCamden, Currituck, Pasquotank, Perquimans56 min

Nearby

Mesoscale Discussions in Virginia, 2007Mesoscale Discussions in North Carolina, 2007Every 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.