Alert archive / Virginia / Mesoscale Discussions in 2003
Mesoscale Discussion 33
The Storm Prediction Center issued this mesoscale discussion at Jan 30, 2003, 2:18 PM EST for Sussex County, Delaware; 12 counties in Maryland; 30 counties in Virginia. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Jan 30, 2003, 2:18 PM EST (19:18 UTC)
- Expired
- Jan 30, 2003, 6:15 PM EST
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
All 43 counties
Sussex County, DE, Anne Arundel County, MD, Calvert County, MD, Caroline County, MD, Charles County, MD, Dorchester County, MD, Kent County, MD, Prince George's County, MD, Queen Anne's County, MD, Saint Mary's County, MD, Somerset County, MD, Talbot County, MD, Wicomico County, MD, Amelia County, VA, Caroline County, VA, Charles City County, VA, Chesterfield County, VA, City of Colonial Heights, VA, City of Fredericksburg, VA, City of Hopewell, VA, City of Petersburg, VA, City of Richmond, VA, Cumberland County, VA, Dinwiddie County, VA, Essex County, VA, Goochland County, VA, Hanover County, VA, Henrico County, VA, King and Queen County, VA, King George County, VA, King William County, VA, Lancaster County, VA, Middlesex County, VA, New Kent County, VA, Northumberland County, VA, Nottoway County, VA, Powhatan County, VA, Prince Edward County, VA, Prince George County, VA, Richmond County, VA, Spotsylvania County, VA, Stafford County, VA, Westmoreland County, VA
The radar
The Norfolk radar (KAKQ), 96 km from the middle of the area, began a volume at 19:19 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
Washington/Dulle, VA (KIAD), launched 12:00Z, 7.3 hours before the alert went out and 128 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 822 m above ground
- 0-6 km bulk shear
- 61 kt
- 0-1 km storm-relative helicity
- -59 m²/s²
- 0-3 km storm-relative helicity
- 39 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 ACUS11 KWNS 301919 SWOMCD SPC MCD 301918 MDZ000-VAZ000-DEZ000-302315- MESOSCALE DISCUSSION 0033 NWS STORM PREDICTION CENTER NORMAN OK 0118 PM CST THU JAN 30 2003 AREAS AFFECTED...ERN MD/ERN VA DE AND DISTRICT OF COLUMBIA CONCERNING...PRECIPITATION TRENDS...WINTER PRECIPITATION VALID 301918Z - 302315Z LATEST WATER VAPOR IMAGERY SHOWED A VORT MAX ROTATING AROUND THE BASE OF A TROUGH ACROSS TN/KY. AS THIS FEATURE MOVES E/NE...LIFT WILL INCREASE ACROSS THE DISCUSSION AREA WITH MODERATE PRECIPITATION DEVELOPING. SFC FREEZING LINE CURRENTLY EXTENDS FROM AROUND BWI INTO CNTRL VA THEN EAST TO AROUND WAKEFIELD. AREA OF PRECIPITATION WILL MOVE INTO THIS COOLER WEDGE OF AIR...RESULTING IN AREAS OF FZRA AND SNOW. 15Z RUC MODEL INDICATED AROUND A QUARTER INCH OF PRECIPITATION THROUGH 00Z...WITH PCPN CONTINUING AFTER 31/00Z. RUC PTYPE ALGORITHM SUGGESTS MUCH OF THIS WILL FALL AS SNOW...ALTHOUGH A NARROW BAND OF FZRA IS POSSIBLE AS WELL. SNOWFALL RATES MAY OCCASIONALLY APPROACH 1/HR THOUGH THE AFTN/EARLY EVENING. ..TAYLOR.. 01/30/2003 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... 37197851 38187779 39467636 38607505 37177717 36837798
Nearby
Mesoscale Discussions in Virginia, 2003Mesoscale Discussions in Maryland, 2003Mesoscale Discussions in Delaware, 2003Every 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.