Alert archive / New York / Severe Thunderstorm Watches in 2008

Severe Thunderstorm Watch 813

August 7, 20087 states

The Storm Prediction Center issued this severe thunderstorm watch at Aug 7, 2008, 12:48 PM EDT for 7 states. It was in force for 8 hr.

The area

The outline as issued.

The facts

Issued
Aug 7, 2008, 12:48 PM EDT (16:48 UTC)
Expired
Aug 7, 2008, 9:00 PM EDT
In force
8 hr
Issued by
the Storm Prediction Center
Largest hail expected
1.5 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, Berkshire County, MA, Franklin County, MA, Hampden County, MA, Hampshire County, MA, Middlesex County, MA, Worcester County, MA, Cheshire County, NH, Hillsborough County, NH, Bergen County, NJ, Essex County, NJ, Hudson County, NJ, Passaic County, NJ, Union County, NJ, Albany County, NY, Bronx County, NY, Columbia County, NY, Dutchess County, NY, Fulton County, NY, Greene County, NY, Hamilton County, NY, Kings County, NY, Montgomery 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, Saratoga County, NY, Schenectady County, NY, Schoharie County, NY, Ulster County, NY, Warren County, NY, Washington County, NY, Westchester County, NY, Providence County, RI, Bennington County, VT, Windham County, VT

The radar

The Albany radar (KENX), 76 km from the middle of the area, began a volume at 16:51 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
5%
One or more EF2 to EF5 tornadoes
2%
Ten or more severe wind reports
30%
One or more gusts of 65 knots or more
20%
Ten or more severe hail reports
40%
One or more hailstones of 2 inches or more
10%
Six or more combined severe hail and wind reports
80%

Warnings issued inside it

67 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Aug 7, 12:48 PM EDTSevere Thunderstorm WarningALYWarren, Washington57 min
Aug 7, 12:55 PM EDTSevere Thunderstorm WarningALYDutchess, Ulster65 min
Aug 7, 12:59 PM EDTSevere Thunderstorm WarningALYRensselaer, Saratoga, Washington46 min
Aug 7, 1:02 PM EDTFlash Flood WarningALYWindham3 hr
Aug 7, 1:11 PM EDTSevere Thunderstorm WarningALYWindham64 min
Aug 7, 1:16 PM EDTSevere Thunderstorm WarningALYWarren, Washington59 min
Aug 7, 1:25 PM EDTSevere Thunderstorm WarningBOXHampden, Hampshire65 min
Aug 7, 1:30 PM EDTSevere Thunderstorm WarningBOXMiddlesex, Worcester60 min
Aug 7, 1:33 PM EDTSevere Thunderstorm WarningBOXCapitol Planning Region57 min
Aug 7, 1:34 PM EDTFlash Flood WarningOKXNassau116 min
Aug 7, 1:36 PM EDTSevere Thunderstorm WarningBOXCheshire21 min
Aug 7, 1:49 PM EDTFlash Flood WarningOKXGreater Bridgeport Planning Region3 hr
Aug 7, 1:53 PM EDTSevere Thunderstorm WarningALYFulton, Hamilton, Saratoga67 min
Aug 7, 2:03 PM EDTSevere Thunderstorm WarningALYDutchess, Ulster43 min
Aug 7, 2:05 PM EDTSevere Thunderstorm WarningALYSaratoga, Warren55 min
Aug 7, 2:06 PM EDTSevere Thunderstorm WarningBOXMiddlesex, Norfolk, Worcester39 min
Aug 7, 2:08 PM EDTSevere Thunderstorm WarningOKXNaugatuck Valley Planning Region67 min
Aug 7, 2:08 PM EDTSevere Thunderstorm WarningOKXNassau, Suffolk52 min
Aug 7, 2:09 PM EDTSevere Thunderstorm WarningALYSaratoga, Warren51 min
Aug 7, 2:11 PM EDTSevere Thunderstorm WarningBOXFranklin, Worcester64 min
Aug 7, 2:12 PM EDTSevere Thunderstorm WarningBOXNortheastern Connecticut Planning Region63 min
Aug 7, 2:24 PM EDTFlash Flood WarningOKXNaugatuck Valley Planning Region2 hr
Aug 7, 2:25 PM EDTSevere Thunderstorm WarningALYSaratoga50 min
Aug 7, 2:26 PM EDTSevere Thunderstorm WarningBOXWorcester34 min
Aug 7, 2:28 PM EDTSevere Thunderstorm WarningBOXMiddlesex, Worcester39 min
Aug 7, 2:30 PM EDTSevere Thunderstorm WarningBOXCapitol Planning Region47 min
Aug 7, 2:36 PM EDTSevere Thunderstorm WarningBOXNortheastern Connecticut Planning Region54 min
Aug 7, 2:39 PM EDTTornado WarningBOXFranklin, Hampshire, Worcester33 min
Aug 7, 2:41 PM EDTFlash Flood WarningOKXNassau, Suffolk2 hr
Aug 7, 2:48 PM EDTSevere Thunderstorm WarningBOXMiddlesex, Worcester27 min
Aug 7, 2:52 PM EDTSevere Thunderstorm WarningOKXGreater Bridgeport Planning Region, Naugatuck Valley Planning Region53 min
Aug 7, 2:55 PM EDTSevere Thunderstorm WarningALYWindham65 min
Aug 7, 2:58 PM EDTSevere Thunderstorm WarningBOXCapitol Planning Region51 min
Aug 7, 2:58 PM EDTSevere Thunderstorm WarningBOXMiddlesex, Worcester62 min
Aug 7, 2:59 PM EDTSevere Thunderstorm WarningALYSaratoga, Warren, Washington61 min
Aug 7, 3:12 PM EDTSevere Thunderstorm WarningBOXNortheastern Connecticut Planning Region49 min
Aug 7, 3:38 PM EDTFlash Flood WarningOKXGreater Bridgeport Planning Region, Naugatuck Valley Planning Region3 hr
Aug 7, 3:40 PM EDTSevere Thunderstorm WarningBOXMiddlesex, Worcester42 min
Aug 7, 3:44 PM EDTSevere Thunderstorm WarningBOXMiddlesex, Worcester61 min
Aug 7, 3:45 PM EDTSevere Thunderstorm WarningOKXNaugatuck Valley Planning Region18 min
Aug 7, 3:50 PM EDTSevere Thunderstorm WarningOKXLower Connecticut River Valley Planning Region, Southeastern Connecticut Planning Region40 min
Aug 7, 3:52 PM EDTSevere Thunderstorm WarningALYAlbany, Rensselaer53 min
Aug 7, 4:11 PM EDTSevere Thunderstorm WarningALYAlbany, Rensselaer64 min
Aug 7, 4:27 PM EDTSevere Thunderstorm WarningALYAlbany, Columbia, Greene, Rensselaer63 min
Aug 7, 4:30 PM EDTSevere Thunderstorm WarningOKXGreater Bridgeport Planning Region, Naugatuck Valley Planning Region45 min
Aug 7, 4:35 PM EDTSevere Thunderstorm WarningALYBerkshire55 min
Aug 7, 5:17 PM EDTSevere Thunderstorm WarningALYBerkshire58 min
Aug 7, 5:34 PM EDTSevere Thunderstorm WarningBOXFranklin, Hampshire56 min
Aug 7, 5:35 PM EDTSevere Thunderstorm WarningOKXGreater Bridgeport Planning Region, Naugatuck Valley Planning Region40 min
Aug 7, 5:41 PM EDTSevere Thunderstorm WarningALYColumbia, Greene64 min
Aug 7, 5:42 PM EDTSevere Thunderstorm WarningBOXMiddlesex, Norfolk, Worcester18 min
Aug 7, 5:54 PM EDTTornado WarningOKXGreater Bridgeport Planning Region, Naugatuck Valley Planning Region36 min
Aug 7, 6:05 PM EDTSevere Thunderstorm WarningBOXFranklin, Hampden, Hampshire55 min
Aug 7, 6:09 PM EDTSevere Thunderstorm WarningOKXGreater Bridgeport Planning Region, Naugatuck Valley Planning Region51 min
Aug 7, 6:17 PM EDTSevere Thunderstorm WarningALYBerkshire58 min
Aug 7, 6:23 PM EDTFlash Flood WarningOKXGreater Bridgeport Planning Region, Naugatuck Valley Planning Region97 min
Aug 7, 6:30 PM EDTTornado WarningOKXGreater Bridgeport Planning Region, Naugatuck Valley Planning Region30 min
Aug 7, 6:50 PM EDTSevere Thunderstorm WarningBOXFranklin, Hampden, Hampshire55 min
Aug 7, 6:58 PM EDTFlash Flood WarningOKXNassau, Suffolk2 hr
Aug 7, 7:01 PM EDTSevere Thunderstorm WarningALYNorthwest Hills Planning Region44 min
Aug 7, 7:07 PM EDTFlash Flood WarningOKXGreater Bridgeport Planning Region, Naugatuck Valley Planning Region113 min
Aug 7, 7:26 PM EDTSevere Thunderstorm WarningOKXGreater Bridgeport Planning Region49 min
Aug 7, 7:43 PM EDTSevere Thunderstorm WarningBOXCapitol Planning Region62 min
Aug 7, 8:06 PM EDTFlash Flood WarningBOXFranklin, Hampden, Hampshire114 min
Aug 7, 8:35 PM EDTSevere Thunderstorm WarningOKXGreater Bridgeport Planning Region25 min
Aug 7, 8:42 PM EDTSevere Thunderstorm WarningALYNorthwest Hills Planning Region18 min
Aug 7, 8:45 PM EDTSevere Thunderstorm WarningBOXCapitol Planning Region60 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, 4.8 hours before the alert went out and 71 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.

Skew-T log-pSkew-T log-p diagram, Albany, NY at 12:00Z on 2008-08-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 989 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Albany, NY at 12:00Z on 2008-08-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 26 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
989 J/kg
Mixed-layer CIN
-26 J/kg
Mixed-layer LCL
650 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
26 m²/s²
0-3 km storm-relative helicity
42 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 7, 11:34 AM EDTMesoscale DiscussionSPC116 min
Aug 7, 4:25 PM EDTMesoscale DiscussionSPC65 min

Nearby

Severe Thunderstorm Watches in New York, 2008Severe Thunderstorm Watches in Connecticut, 2008Severe Thunderstorm Watches in Massachusetts, 2008Every severe thunderstorm watch in 2008

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.