Alert archive / Virginia / Mesoscale Discussions in 2003
Mesoscale Discussion 2292
The Storm Prediction Center issued this mesoscale discussion at Aug 27, 2003, 6:56 PM EDT for 5 states. It was in force for 64 min.
The area
The outline as issued.
The facts
- Issued
- Aug 27, 2003, 6:56 PM EDT (22:56 UTC)
- Expired
- Aug 27, 2003, 8:00 PM EDT
- In force
- 64 min
- Issued by
- the Storm Prediction Center
All 52 counties
Kent County, DE, New Castle County, DE, Sussex County, DE, Anne Arundel County, MD, Baltimore County, MD, Calvert County, MD, Caroline County, MD, Carroll County, MD, Cecil County, MD, Charles County, MD, City of Baltimore, MD, Dorchester County, MD, Frederick County, MD, Harford County, MD, Howard County, MD, Kent County, MD, Montgomery 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, Worcester County, MD, Camden County, NJ, Cumberland County, NJ, Gloucester County, NJ, Salem County, NJ, Adams County, PA, Accomack County, VA, Arlington County, VA, Caroline County, VA, City of Alexandria, VA, City of Fairfax, VA, City of Falls Church, VA, City of Fredericksburg, VA, City of Manassas, VA, City of Manassas Park, VA, Culpeper County, VA, Essex County, VA, Fairfax County, VA, Fauquier County, VA, Greene County, VA, King George County, VA, Madison County, VA, Northumberland County, VA, Orange County, VA, Prince William County, VA, Richmond County, VA, Spotsylvania County, VA, Stafford County, VA, Westmoreland County, VA
The radar
The Sterling radar (KLWX), 39 km from the middle of the area, began a volume at 22:58 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
Washington/Dulle, VA (KIAD), launched 12:00Z, 10.9 hours before the alert went out and 31 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
- 483 J/kg
- Mixed-layer CIN
- -236 J/kg
- Mixed-layer LCL
- 1264 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 66 m²/s²
- 0-3 km storm-relative helicity
- 71 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
566 ACUS11 KWNS 272256 SWOMCD SPC MCD 272256 NJZ000-DEZ000-MDZ000-VAZ000-PAZ000-DCZ000-280000- MESOSCALE DISCUSSION 2292 NWS STORM PREDICTION CENTER NORMAN OK 0556 PM CDT WED AUG 27 2003 AREAS AFFECTED...NRN/ERN VA...SERN PA...MD...DE...SRN NJ CONCERNING...SEVERE THUNDERSTORM WATCH 902... VALID 272256Z - 280000Z A NEW WW MAY BE NEEDED EAST OF WW 902 AS INTENSIFYING LINE OF STRONG-SEVERE THUNDERSTORMS EXTENDING FROM VA NWD INTO NRN MD AND FAR SCENTRAL PA CONTINUES MOVING EWD. STRONG COLD POOL WITH PRESSURE RISES AROUND 5 MB/2 HRS SHOULD SUPPORT STRONG INFLOW INTO CONVECTIVE LINE. CONVECTIVE LINE WILL CONTINUE TO MOVE ESEWD FROM 35-40 KTS OVER THE NEXT FEW HOURS...WHICH WILL TAKE THE SEVERE THREAT TO THE NERN EDGE OF WW 902 BY 2330Z. CURRENT OBSERVATIONS AND OBJECTIVE ANALYSIS FIELDS AHEAD OF CONVECTIVE LINE INDICATE THAT THE INTENSITY OF THE LINE SHOULD MAINTAIN ITSELF AND POSSIBLY STRENGTHEN AS IT PROGRESSES EWD THROUGH THE REMAINDER OF NRN/ERN VA CENTRAL/SRN MD WHERE AN AXIS OF MLCAPES FROM 2500-3500 J/KG EXISTS. SOME UNCERTAINTY REMAINS WITH HOW LONG THE SEVERE THREAT WITH THIS LINE WILL LAST WITH ONSET OF NOCTURNAL BOUNDARY LAYER COOLING AND EFFECTS OF COOLER OCEAN WATER. ..CROSBIE.. 08/27/2003 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...PHI...AKQ...CTP...LWX... 38137883 39027764 39907726 39837479 37667533
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 27, 9:23 AM EDT | Mesoscale Discussion | SPC | Kent, Sussex | 2 hr |
| Aug 27, 7:30 PM EDT | Severe Thunderstorm Watch | SPC | Kent, New Castle, Sussex | 4 hr |
| Aug 26, 9:20 PM EDT | Severe Thunderstorm Watch | SPC | Allegany, Garrett | 6 hr |
| Aug 26, 10:18 PM EDT | Mesoscale Discussion | SPC | Allegany, Garrett | 57 min |
| Aug 27, 12:22 AM EDT | Mesoscale Discussion | SPC | Charles | 53 min |
| Aug 27, 6:11 AM EDT | Mesoscale Discussion | SPC | Allegany, Garrett, Washington | 2 hr |
| Aug 27, 9:40 AM EDT | Severe Thunderstorm Watch | SPC | Harford | 5 hr |
| Aug 27, 10:35 AM EDT | Severe Thunderstorm Watch | SPC | Allegany, Anne Arundel, Baltimore, Calvert, Carroll, Charles and 8 more | 5 hr |
| Aug 27, 2:10 PM EDT | Mesoscale Discussion | SPC | Allegany, Anne Arundel, Baltimore, Calvert, Carroll, Charles and 8 more | 65 min |
| Aug 27, 3:09 PM EDT | Mesoscale Discussion | SPC | Allegany, Anne Arundel, Baltimore, Calvert, Carroll, Frederick and 7 more | 66 min |
| Aug 27, 3:30 PM EDT | Severe Thunderstorm Watch | SPC | Allegany, Anne Arundel, Baltimore, Calvert, Carroll, Charles and 9 more | 7 hr |
| Aug 27, 5:03 PM EDT | Mesoscale Discussion | SPC | Allegany, Anne Arundel, Baltimore, Calvert, Carroll, Charles and 10 more | 87 min |
| Aug 27, 11:48 AM EDT | Mesoscale Discussion | SPC | Adams, Allegheny, Beaver, Bedford, Cambria, Columbia and 18 more | 87 min |
| Aug 27, 2:05 PM EDT | Severe Thunderstorm Watch | SPC | Fayette, Greene, Washington, Westmoreland | 5 hr |
Nearby
Mesoscale Discussions in Virginia, 2003Mesoscale Discussions in Maryland, 2003Mesoscale Discussions in New Jersey, 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.