Alert archive / Pennsylvania / Mesoscale Discussions in 2003

Mesoscale Discussion 2447

October 14, 20038 counties in New York; 12 counties in Pennsylvania

The Storm Prediction Center issued this mesoscale discussion at Oct 14, 2003, 6:45 PM EDT for 8 counties in New York; 12 counties in Pennsylvania. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued: Oct 14, 2003, 6:45 PM EDT (22:45 UTC)
Expired: Oct 14, 2003, 8:15 PM EDT
In force: 90 min
Issued by: the Storm Prediction Center

Counties Allegany County, NY, Cattaraugus County, NY, Erie County, NY, Genesee County, NY, Livingston County, NY, Niagara County, NY, Orleans County, NY, Wyoming County, NY, Bedford County, PA, Blair County, PA, Cambria County, PA, Cameron County, PA, Centre County, PA, Clearfield County, PA, Clinton County, PA, Elk County, PA, Fulton County, PA, Huntingdon County, PA, McKean County, PA, Potter County, PA

The radar

The State College radar (KCCX), 56 km from the middle of the area, began a volume at 22:45 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

Pittsburgh, PA (KPIT), launched 12:00Z, 10.8 hours before the alert went out and 170 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1384 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 127 m²/s²
0-3 km storm-relative helicity: 173 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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.

Issued	Product	Office	Counties	Lasted
Oct 14, 10:45 AM EDT	Mesoscale Discussion	SPC	Adams, Allegheny, Armstrong, Beaver, Bedford, Berks and 28 more	90 min

Nearby

Mesoscale Discussions in Pennsylvania, 2003 Mesoscale Discussions in New York, 2003 Every 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.