Alert archive / Virginia / Mesoscale Discussions in 2004

Mesoscale Discussion 2005

August 14, 20044 counties in North Carolina; 5 counties in Virginia

The Storm Prediction Center issued this mesoscale discussion at Aug 14, 2004, 6:28 PM EDT for 4 counties in North Carolina; 5 counties in Virginia. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued: Aug 14, 2004, 6:28 PM EDT (22:28 UTC)
Expired: Aug 14, 2004, 8:00 PM EDT
In force: 92 min
Issued by: the Storm Prediction Center

Counties Camden County, NC, Currituck County, NC, Dare County, NC, Pasquotank County, NC, City of Chesapeake, VA, City of Norfolk, VA, City of Portsmouth, VA, City of Virginia Beach, VA, Northampton County, VA

The radar

The Norfolk radar (KAKQ), 135 km from the middle of the area, began a volume at 22:30 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

Wallops Is Stn, VA (KWAL), launched 12:00Z, 10.5 hours before the alert went out and 161 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: 193 J/kg
Mixed-layer CIN: -23 J/kg
Mixed-layer LCL: 541 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 14 m²/s²
0-3 km storm-relative helicity: 59 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

989 
ACUS11 KWNS 142229
SWOMCD
SPC MCD 142228 
DEZ000-MDZ000-VAZ000-NCZ000-150000-

MESOSCALE DISCUSSION 2005
NWS STORM PREDICTION CENTER NORMAN OK
0528 PM CDT SAT AUG 14 2004

AREAS AFFECTED...EXTREME ERN NC AND SERN VA/COASTAL MD

CONCERNING...TORNADO WATCH 753...

VALID 142228Z - 150000Z

TORNADO THREAT CONTINUES FOR MAINLY EXTREME ERN NC AND SERN VA.
TORNADO WATCH MAY NOT BE EXTENDED NWD AS CHARLEY CONTINUES TO WEAKEN
AND THE MAIN CONVECTIVE BAND IS EXPECTED TO SHIFT MOSTLY OFFSHORE
DURING THE NEXT FEW HOURS. 

AT 22Z...RADAR INDICATES THE CENTER OF TROPICAL STORM CHARLEY WAS
LOCATED NEAR THE NC/VA BORDER ABOUT 20 NNW ECG. THE MOTION THE PAST
COUPLE OF HOURS HAS BEEN NNEWD NEAR 30 KT...WHICH PLACES THE CENTER
NEAR ORF AT 00Z AND ABOUT 15 NE WAL AT 03Z. THE WINDS IN THE SYSTEM
CONTINUE TO SLOWLY WEAKEN...THOUGH SUFFICIENT SHEAR EXISTS FOR
TORNADOES...ESPECIALLY IN THE MOST ERN BAND THAT EXTENDS FROM NEAR
ORF TO 10 EAST ECG TO 25 W HSE. HOWEVER...AS THE CENTER CONTINUES TO
MOVE NNEWD...THE BAND ON THE EAST SIDE OF CHARLEY WILL REMAIN MOSTLY
OFF SHORE. AN ISOLATED TORNADO OR TWO WILL BE POSSIBLE NEAR THE
CENTER AS IT TRACKS JUST TO THE EAST OF THE CHESAPEAKE BAY...BUT
GIVEN THE SMALL AREA AND WITH THE GREATEST TORNADO THREAT EXPECTED
TO BE OFFSHORE...ADDITIONAL WW IS NOT ANTICIPATED ATTM.

..IMY.. 08/14/2004

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...PHI...AKQ...MHX...

35097599 35837597 36597669 38587494 37777418

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 14, 2:05 AM EDT	Mesoscale Discussion	SPC	Bladen, Brunswick, Columbus, Craven, Cumberland, Duplin and 10 more	115 min
Aug 14, 3:30 AM EDT	Tornado Watch	SPC	Beaufort, Bladen, Brunswick, Carteret, Columbus, Craven and 25 more	10 hr
Aug 14, 8:37 AM EDT	Mesoscale Discussion	SPC	Beaufort, Bertie, Bladen, Brunswick, Camden, Carteret and 40 more	113 min
Aug 14, 11:30 AM EDT	Tornado Watch	SPC	Beaufort, Bertie, Brunswick, Camden, Carteret, Chowan and 21 more	10 hr
Aug 14, 2:34 PM EDT	Mesoscale Discussion	SPC	Beaufort, Bertie, Camden, Carteret, Chowan, Craven and 14 more	116 min

Nearby

Mesoscale Discussions in Virginia, 2004 Mesoscale Discussions in North Carolina, 2004 Every mesoscale discussion in 2004

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.