Alert archive / Pennsylvania / Mesoscale Discussions in 2003
Mesoscale Discussion 1659
The Storm Prediction Center issued this mesoscale discussion at Jul 6, 2003, 7:23 PM EDT for 6 states. It was in force for 67 min.
The area
The outline as issued.
The facts
- Issued
- Jul 6, 2003, 7:23 PM EDT (23:23 UTC)
- Expired
- Jul 6, 2003, 8:30 PM EDT
- In force
- 67 min
- Issued by
- the Storm Prediction Center
All 45 counties
Kent County, DE, New Castle County, DE, Allegany County, MD, Baltimore County, MD, Carroll County, MD, Cecil County, MD, City of Baltimore, MD, Frederick County, MD, Harford County, MD, Howard County, MD, Kent County, MD, Montgomery County, MD, Queen Anne's County, MD, Washington County, MD, Atlantic County, NJ, Burlington County, NJ, Camden County, NJ, Cumberland County, NJ, Gloucester County, NJ, Mercer County, NJ, Ocean County, NJ, Salem County, NJ, Adams County, PA, Berks County, PA, Bucks County, PA, Chester County, PA, Cumberland County, PA, Dauphin County, PA, Delaware County, PA, Franklin County, PA, Fulton County, PA, Lancaster County, PA, Lebanon County, PA, Lehigh County, PA, Montgomery County, PA, Perry County, PA, Philadelphia County, PA, Schuylkill County, PA, York County, PA, City of Winchester, VA, Frederick County, VA, Berkeley County, WV, Hampshire County, WV, Jefferson County, WV, Morgan County, WV
The radar
The Sterling radar (KLWX), 139 km from the middle of the area, began a volume at 23:27 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, 11.4 hours before the alert went out and 136 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
- 487 J/kg
- Mixed-layer CIN
- -143 J/kg
- Mixed-layer LCL
- 1310 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 32 m²/s²
- 0-3 km storm-relative helicity
- 44 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 6, 12:28 AM EDT | Mesoscale Discussion | SPC | Kent, New Castle | 2 hr |
| Jul 6, 1:04 PM EDT | Mesoscale Discussion | SPC | Kent, Sussex | 2 hr |
| Jul 6, 5:46 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Calvert, Charles, Montgomery, Prince George's, Saint Mary's | 59 min |
Nearby
Mesoscale Discussions in Pennsylvania, 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.