Alert archive / New Jersey / Severe Thunderstorm Watches in 2011
Severe Thunderstorm Watch 452
The Storm Prediction Center issued this severe thunderstorm watch at Jun 9, 2011, 2:34 PM EDT for 8 states. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 9, 2011, 2:34 PM EDT (18:34 UTC)
- Expired
- Jun 9, 2011, 10:00 PM EDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 70 kt
All 68 counties
Capitol Planning Region, CT, Greater Bridgeport Planning Region, CT, Lower Connecticut River Valley Planning Region, CT, Naugatuck Valley Planning Region, CT, Northeastern Connecticut Planning Region, CT, Southeastern Connecticut Planning Region, CT, New Castle County, DE, Barnstable County, MA, Bristol County, MA, Dukes County, MA, Essex County, MA, Franklin County, MA, Hampden County, MA, Hampshire County, MA, Middlesex County, MA, Nantucket County, MA, Norfolk County, MA, Plymouth County, MA, Suffolk County, MA, Worcester County, MA, Cecil 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, 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, Westchester County, NY, Berks County, PA, Bucks County, PA, Carbon County, PA, Chester County, PA, Delaware County, PA, Lehigh County, PA, Monroe County, PA, Montgomery County, PA, Northampton County, PA, Philadelphia County, PA, Bristol County, RI, Kent County, RI, Newport County, RI, Providence County, RI, Washington County, RI
The radar
The Brookhaven radar (KOKX), 62 km from the middle of the area, began a volume at 18:35 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.
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 20%
- One or more EF2 to EF5 tornadoes
- 5%
- Ten or more severe wind reports
- 95%
- One or more gusts of 65 knots or more
- 60%
- Ten or more severe hail reports
- 60%
- One or more hailstones of 2 inches or more
- 50%
- Six or more combined severe hail and wind reports
- 95%
Warnings issued inside it
31 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 9, 3:06 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampshire | 54 min |
| Jun 9, 3:20 PM EDT | Severe Thunderstorm Warning | OKX | Orange, Putnam | 55 min |
| Jun 9, 3:33 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 16 min |
| Jun 9, 3:55 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampshire, Middlesex, Worcester | 65 min |
| Jun 9, 4:00 PM EDT | Severe Thunderstorm Warning | BOX | Capitol Planning Region | 60 min |
| Jun 9, 4:10 PM EDT | Severe Thunderstorm Warning | OKX | Orange, Putnam | 65 min |
| Jun 9, 4:18 PM EDT | Severe Thunderstorm Warning | OKX | Greater Bridgeport Planning Region, Naugatuck Valley Planning Region | 57 min |
| Jun 9, 4:23 PM EDT | Severe Thunderstorm Warning | BOX | Essex, Franklin, Hampshire, Middlesex, Norfolk, Suffolk and 1 more | 67 min |
| Jun 9, 4:38 PM EDT | Severe Thunderstorm Warning | OKX | Orange | 69 min |
| Jun 9, 4:39 PM EDT | Severe Thunderstorm Warning | BOX | Capitol Planning Region | 66 min |
| Jun 9, 4:41 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 64 min |
| Jun 9, 4:54 PM EDT | Severe Thunderstorm Warning | BOX | Capitol Planning Region, Northeastern Connecticut Planning Region | 54 min |
| Jun 9, 4:55 PM EDT | Severe Thunderstorm Warning | OKX | Greater Bridgeport Planning Region, Naugatuck Valley Planning Region | 68 min |
| Jun 9, 5:09 PM EDT | Severe Thunderstorm Warning | OKX | Greater Bridgeport Planning Region, Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region, Southeastern Connecticut Planning Region | 71 min |
| Jun 9, 5:22 PM EDT | Severe Thunderstorm Warning | OKX | Greater Bridgeport Planning Region | 53 min |
| Jun 9, 5:24 PM EDT | Severe Thunderstorm Warning | BOX | Northeastern Connecticut Planning Region | 66 min |
| Jun 9, 5:34 PM EDT | Severe Thunderstorm Warning | PHI | Morris, Sussex | 41 min |
| Jun 9, 5:43 PM EDT | Severe Thunderstorm Warning | PHI | Morris, Sussex, Warren | 62 min |
| Jun 9, 5:52 PM EDT | Severe Thunderstorm Warning | BOX | Northeastern Connecticut Planning Region | 53 min |
| Jun 9, 6:07 PM EDT | Severe Thunderstorm Warning | OKX | Bergen | 23 min |
| Jun 9, 6:13 PM EDT | Severe Thunderstorm Warning | BOX | Barnstable, Bristol, Plymouth | 62 min |
| Jun 9, 6:23 PM EDT | Severe Thunderstorm Warning | OKX | Westchester | 22 min |
| Jun 9, 6:24 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Montgomery | 66 min |
| Jun 9, 6:44 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Morris, Somerset, Warren | 61 min |
| Jun 9, 6:49 PM EDT | Severe Thunderstorm Warning | BOX | Barnstable, Dukes, Nantucket | 56 min |
| Jun 9, 7:21 PM EDT | Severe Thunderstorm Warning | PHI | Middlesex, Monmouth | 39 min |
| Jun 9, 7:27 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 48 min |
| Jun 9, 7:42 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Mercer, Middlesex, Morris, Somerset | 33 min |
| Jun 9, 7:57 PM EDT | Severe Thunderstorm Warning | PHI | Mercer, Middlesex, Monmouth | 18 min |
| Jun 9, 8:10 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 65 min |
| Jun 9, 8:45 PM EDT | Severe Thunderstorm Warning | PHI | Cecil, Kent, Queen Anne's | 60 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 6.6 hours before the alert went out and 61 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
- 1610 J/kg
- Mixed-layer CIN
- -193 J/kg
- Mixed-layer LCL
- 1424 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 32 m²/s²
- 0-3 km storm-relative helicity
- 98 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.1
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 8, 8:31 PM EDT | Severe Thunderstorm Watch | SPC | Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region, Southeastern Connecticut Planning Region | 2 hr |
| Jun 9, 11:33 AM EDT | Mesoscale Discussion | SPC | 57 min | |
| Jun 9, 12:06 PM EDT | Severe Thunderstorm Watch | SPC | Northwest Hills Planning Region | 8 hr |
| Jun 9, 1:45 PM EDT | Mesoscale Discussion | SPC | 90 min | |
| Jun 9, 4:17 PM EDT | Mesoscale Discussion | SPC | 88 min | |
| Jun 9, 7:17 PM EDT | Mesoscale Discussion | SPC | 58 min | |
| Jun 9, 12:53 PM EDT | Severe Thunderstorm Watch | SPC | Allegany, Baltimore, Carroll, Frederick, Garrett, Harford and 4 more | 7 hr |
| Jun 9, 6:17 PM EDT | Mesoscale Discussion | SPC | Allegany, Baltimore, Carroll, Frederick, Garrett, Howard and 4 more | 58 min |
| Jun 9, 3:18 PM EDT | Mesoscale Discussion | SPC | Berkshire, Franklin | 87 min |
| Jun 8, 8:36 PM EDT | Mesoscale Discussion | SPC | Cayuga, Fulton, Hamilton, Herkimer, Jefferson, Lewis and 6 more | 84 min |
| Jun 8, 8:57 PM EDT | Severe Thunderstorm Watch | SPC | Cayuga, Fulton, Hamilton, Herkimer, Jefferson, Lewis and 9 more | 3 hr |
| Jun 9, 3:29 AM EDT | Mesoscale Discussion | SPC | Allegany, Cattaraugus, Chautauqua, Erie, Genesee, Livingston and 10 more | 2 hr |
| Jun 9, 3:56 AM EDT | Severe Thunderstorm Watch | SPC | Allegany, Cattaraugus, Cayuga, Chautauqua, Chemung, Erie and 14 more | 6 hr |
| Jun 9, 8:13 AM EDT | Mesoscale Discussion | SPC | Allegany, Cattaraugus, Cayuga, Chautauqua, Chemung, Erie and 12 more | 2 hr |
| Jun 9, 10:36 AM EDT | Mesoscale Discussion | SPC | Albany, Allegany, Broome, Cattaraugus, Cayuga, Chemung and 30 more | 84 min |
Nearby
Severe Thunderstorm Watches in New Jersey, 2011Severe Thunderstorm Watches in Massachusetts, 2011Severe Thunderstorm Watches in New York, 2011Every severe thunderstorm watch in 2011
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.