Alert archive / New York / Mesoscale Discussions in 2023
Mesoscale Discussion 2004
The Storm Prediction Center issued this mesoscale discussion at Aug 15, 2023, 7:05 PM EDT for 20 counties in New York; 11 counties in Pennsylvania. It was in force for 115 min.
The area
The outline as issued.
The facts
- Issued
- Aug 15, 2023, 7:05 PM EDT (23:05 UTC)
- Expired
- Aug 15, 2023, 9:00 PM EDT
- In force
- 115 min
- Issued by
- the Storm Prediction Center
- Concerning
- Severe potential...watch unlikely
- Chance of a watch
- 20%
All 31 counties
Allegany County, NY, Cattaraugus County, NY, Cayuga County, NY, Chautauqua County, NY, Chemung County, NY, Erie County, NY, Genesee County, NY, Livingston County, NY, Monroe County, NY, Niagara County, NY, Ontario County, NY, Orleans County, NY, Schuyler County, NY, Seneca County, NY, Steuben County, NY, Tioga County, NY, Tompkins County, NY, Wayne County, NY, Wyoming County, NY, Yates County, NY, Bradford County, PA, Columbia County, PA, Crawford County, PA, Erie County, PA, Lycoming County, PA, Montour County, PA, Northumberland County, PA, Sullivan County, PA, Tioga County, PA, Venango County, PA, Warren County, PA
The nearest sounding before it
Pittsburgh, PA (KPIT), launched 12:00Z, 11.1 hours before the alert went out and 239 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
- 471 J/kg
- Mixed-layer CIN
- -11 J/kg
- Mixed-layer LCL
- 516 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 62 m²/s²
- 0-3 km storm-relative helicity
- 138 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.0
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 15, 1:28 PM EDT | Mesoscale Discussion | SPC | Chester, Delaware | 3 hr |
| Aug 15, 2:08 PM EDT | Severe Thunderstorm Watch | SPC | Bucks, Chester, Delaware, Montgomery, Philadelphia | 6 hr |
Nearby
Mesoscale Discussions in New York, 2023Mesoscale Discussions in Pennsylvania, 2023Every mesoscale discussion in 2023
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.