Alert archive / New Jersey / Mesoscale Discussions in 2012
Mesoscale Discussion 1731
The Storm Prediction Center issued this mesoscale discussion at Aug 10, 2012, 8:21 AM EDT for 7 states. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 10, 2012, 8:21 AM EDT (12:21 UTC)
- Expired
- Aug 10, 2012, 10:45 AM EDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 40%
All 60 counties
Kent County, DE, New Castle County, DE, Sussex County, DE, Berkshire County, MA, Caroline County, MD, Cecil County, MD, Dorchester County, MD, Kent County, MD, Queen Anne's County, MD, Somerset County, MD, Talbot County, MD, Wicomico County, MD, Worcester County, MD, Atlantic County, NJ, Bergen County, NJ, Burlington County, NJ, Camden County, NJ, Cape May County, NJ, Cumberland County, NJ, Essex County, NJ, Gloucester County, NJ, Hudson County, NJ, Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Morris County, NJ, Ocean County, NJ, Passaic County, NJ, Salem County, NJ, Somerset County, NJ, Sussex County, NJ, Union County, NJ, Warren County, NJ, Bronx County, NY, Columbia County, NY, Dutchess County, NY, Kings County, NY, Nassau County, NY, New York County, NY, Orange County, NY, Putnam County, NY, Queens County, NY, Richmond County, NY, Rockland County, NY, Suffolk County, NY, Sullivan County, NY, Ulster County, NY, Westchester County, NY, Bucks County, PA, Chester County, PA, Delaware County, PA, Lehigh County, PA, Monroe County, PA, Montgomery County, PA, Northampton County, PA, Philadelphia County, PA, Pike County, PA, Wayne County, PA, Northumberland County, VA
The radar
The Philadelphia radar (KDIX), 58 km from the middle of the area, began a volume at 12:23 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
Wallops Is Stn, VA (KWAL), launched 12:00Z, 0.4 hours before the alert went out and 186 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
- 1273 J/kg
- Mixed-layer CIN
- -9 J/kg
- Mixed-layer LCL
- 653 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 43 m²/s²
- 0-3 km storm-relative helicity
- 61 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.7
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 |
|---|---|---|---|---|
| Aug 10, 2:03 PM EDT | Mesoscale Discussion | SPC | 87 min | |
| Aug 10, 3:31 PM EDT | Tornado Watch | SPC | Capitol Planning Region, Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region, Southeastern Connecticut Planning Region, Northeastern Connecticut Planning Region | 5 hr |
| Aug 10, 7:31 PM EDT | Mesoscale Discussion | SPC | New Castle | 119 min |
| Aug 10, 3:31 PM EDT | Mesoscale Discussion | SPC | Carroll, Frederick, Montgomery, Washington | 89 min |
| Aug 10, 12:49 PM EDT | Mesoscale Discussion | SPC | Allegany, Cattaraugus, Chautauqua, Erie, Genesee, Niagara and 2 more | 86 min |
| Aug 10, 12:20 PM EDT | Mesoscale Discussion | SPC | Buchanan, Dickenson, Lee, Russell, Scott, Tazewell and 4 more | 85 min |
Nearby
Mesoscale Discussions in New Jersey, 2012Mesoscale Discussions in New York, 2012Mesoscale Discussions in Pennsylvania, 2012Every mesoscale discussion in 2012
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.