Alert archive / Connecticut / Mesoscale Discussions in 2012
Mesoscale Discussion 1492
The Storm Prediction Center issued this mesoscale discussion at Jul 18, 2012, 2:46 PM EDT for 4 states. It was in force for 89 min.
The area
The outline as issued.
The facts
- Issued
- Jul 18, 2012, 2:46 PM EDT (18:46 UTC)
- Expired
- Jul 18, 2012, 4:15 PM EDT
- In force
- 89 min
- Issued by
- the Storm Prediction Center
All 25 counties
Barnstable County, MA, Bristol County, MA, Dukes County, MA, Hampden County, MA, Middlesex County, MA, Norfolk County, MA, Plymouth County, MA, Suffolk County, MA, Worcester County, MA, Bergen County, NJ, Hudson County, NJ, Bronx County, NY, Kings County, NY, Nassau County, NY, New York County, NY, Putnam County, NY, Queens County, NY, Rockland County, NY, Suffolk County, NY, Westchester County, NY, Bristol County, RI, Kent County, RI, Newport County, RI, Providence County, RI, Washington County, RI
The radar
The Brookhaven radar (KOKX), 82 km from the middle of the area, began a volume at 18:49 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
Brookhaven, NY (KOKX), launched 12:00Z, 6.8 hours before the alert went out and 82 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
- 2129 J/kg
- Mixed-layer CIN
- -147 J/kg
- Mixed-layer LCL
- 1491 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 82 m²/s²
- 0-3 km storm-relative helicity
- 95 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 18, 10:25 AM EDT | Mesoscale Discussion | SPC | 2 hr | |
| Jul 18, 12:20 PM EDT | Severe Thunderstorm Watch | SPC | Greater Bridgeport Planning Region, Capitol Planning Region, Northwest Hills Planning Region, Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region, Southeastern Connecticut Planning Region and 1 more | 9 hr |
| Jul 18, 4:50 PM EDT | Mesoscale Discussion | SPC | 85 min | |
| Jul 18, 12:41 PM EDT | Severe Thunderstorm Watch | SPC | Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 10 more | 8 hr |
| Jul 18, 3:44 PM EDT | Mesoscale Discussion | SPC | Atlantic, Burlington, Camden, Cumberland, Gloucester, Hunterdon and 3 more | 91 min |
Nearby
Mesoscale Discussions in Connecticut, 2012Mesoscale Discussions in Massachusetts, 2012Mesoscale Discussions in New York, 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.