Alert archive / New York / Severe Thunderstorm Watches in 2015
Severe Thunderstorm Watch 341
The Storm Prediction Center issued this severe thunderstorm watch at Jun 23, 2015, 10:12 AM EDT for 5 states. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 23, 2015, 10:12 AM EDT (14:12 UTC)
- Expired
- Jun 23, 2015, 4:00 PM EDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1 in
- Strongest gust expected
- 60 kt
All 46 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, Northwest Hills Planning Region, CT, Southeastern Connecticut Planning Region, CT, Berkshire County, MA, Bristol County, MA, Essex County, MA, Franklin County, MA, Hampden County, MA, Hampshire County, MA, Middlesex County, MA, Norfolk County, MA, Plymouth County, MA, Suffolk County, MA, Worcester County, MA, Belknap County, NH, Cheshire County, NH, Hillsborough County, NH, Merrimack County, NH, Rockingham County, NH, Strafford County, NH, Sullivan County, NH, Bronx County, NY, Columbia County, NY, Dutchess County, NY, Greene County, NY, Kings County, NY, Nassau County, NY, New York County, NY, Orange County, NY, Putnam County, NY, Queens County, NY, Rensselaer County, NY, Richmond County, NY, Rockland County, NY, Suffolk County, NY, Ulster County, NY, Westchester County, NY, Bristol County, RI, Kent County, RI, Newport County, RI, Providence County, RI, Washington County, RI
The radar
The Boston radar (KBOX), 94 km from the middle of the area, began a volume at 14:14 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
- 10%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 50%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 10%
- Six or more combined severe hail and wind reports
- 90%
Warnings issued inside it
5 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 23, 12:17 PM EDT | Severe Thunderstorm Warning | BOX | Essex | 14 min |
| Jun 23, 12:20 PM EDT | Tornado Warning | BOX | Essex | 11 min |
| Jun 23, 2:43 PM EDT | Severe Thunderstorm Warning | OKX | Orange, Rockland | 47 min |
| Jun 23, 3:04 PM EDT | Severe Thunderstorm Warning | ALY | Ulster | 31 min |
| Jun 23, 3:44 PM EDT | Severe Thunderstorm Warning | OKX | Greater Bridgeport Planning Region, Naugatuck Valley Planning Region | 46 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
Albany, NY (KALY), launched 12:00Z, 2.2 hours before the alert went out and 144 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
- 56 J/kg
- Mixed-layer CIN
- -246 J/kg
- Mixed-layer LCL
- 1348 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 396 m²/s²
- 0-3 km storm-relative helicity
- 462 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 23, 8:57 AM EDT | Mesoscale Discussion | SPC | 63 min | |
| Jun 23, 2:46 PM EDT | Mesoscale Discussion | SPC | 89 min | |
| Jun 23, 3:35 PM EDT | Severe Thunderstorm Watch | SPC | Greater Bridgeport Planning Region, Northwest Hills Planning Region, Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region, Southeastern Connecticut Planning Region | 6 hr |
| Jun 23, 3:47 PM EDT | Tornado Watch | SPC | Capitol Planning Region, Northeastern Connecticut Planning Region | 7 hr |
| Jun 23, 4:53 PM EDT | Mesoscale Discussion | SPC | 97 min | |
| Jun 23, 6:55 PM EDT | Mesoscale Discussion | SPC | 95 min | |
| Jun 23, 4:24 AM EDT | Mesoscale Discussion | SPC | Allegany, Cattaraugus, Cayuga, Chautauqua, Chemung, Chenango and 21 more | 66 min |
| Jun 23, 5:30 AM EDT | Mesoscale Discussion | SPC | Allegany, Cattaraugus, Chautauqua, Steuben, Yates | 60 min |
| Jun 23, 6:08 AM EDT | Severe Thunderstorm Watch | SPC | Chemung, Schuyler, Steuben, Tioga, Tompkins | 4 hr |
| Jun 23, 8:39 AM EDT | Mesoscale Discussion | SPC | Broome, Chenango, Delaware, Sullivan | 96 min |
| Jun 23, 5:47 PM EDT | Mesoscale Discussion | SPC | Kings, Richmond | 88 min |
| Jun 23, 7:41 PM EDT | Mesoscale Discussion | SPC | Kings, Richmond | 94 min |
Nearby
Severe Thunderstorm Watches in New York, 2015Severe Thunderstorm Watches in Massachusetts, 2015Severe Thunderstorm Watches in Connecticut, 2015Every severe thunderstorm watch in 2015
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.