Alert archive / Massachusetts / Severe Thunderstorm Watches in 2002

Severe Thunderstorm Watch 514

July 15, 20026 states

The Storm Prediction Center issued this severe thunderstorm watch at Jul 15, 2002, 2:45 PM EDT for 6 states. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Jul 15, 2002, 2:45 PM EDT (18:45 UTC)
Expired
Jul 15, 2002, 8:00 PM EDT
In force
5 hr
Issued by
the Storm Prediction Center
All 30 counties

Berkshire 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, Androscoggin County, ME, Cumberland County, ME, York County, ME, Belknap County, NH, Carroll County, NH, Cheshire County, NH, Grafton County, NH, Hillsborough County, NH, Merrimack County, NH, Rockingham County, NH, Strafford County, NH, Sullivan County, NH, Columbia County, NY, Rensselaer County, NY, Washington County, NY, Providence County, RI, Bennington County, VT, Rutland County, VT, Windham County, VT, Windsor County, VT

The radar

The Boston radar (KBOX), 151 km from the middle of the area, began a volume at 18:44 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.

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jul 15, 2:49 PM EDTSevere Thunderstorm WarningBTVRutland56 min
Jul 15, 3:09 PM EDTSevere Thunderstorm WarningGYXGrafton21 min
Jul 15, 3:25 PM EDTSevere Thunderstorm WarningBTVWindsor65 min
Jul 15, 3:31 PM EDTSevere Thunderstorm WarningGYXCarroll44 min
Jul 15, 3:57 PM EDTSevere Thunderstorm WarningGYXSullivan33 min
Jul 15, 4:13 PM EDTSevere Thunderstorm WarningGYXAndroscoggin, Kennebec32 min
Jul 15, 4:35 PM EDTSevere Thunderstorm WarningGYXCumberland, York25 min
Jul 15, 4:49 PM EDTSevere Thunderstorm WarningALYWindham56 min
Jul 15, 4:49 PM EDTSevere Thunderstorm WarningBTVWindsor26 min
Jul 15, 4:52 PM EDTSevere Thunderstorm WarningGYXAndroscoggin, Kennebec, Sagadahoc23 min
Jul 15, 4:52 PM EDTSevere Thunderstorm WarningALYBennington53 min
Jul 15, 5:01 PM EDTSevere Thunderstorm WarningGYXYork59 min
Jul 15, 5:17 PM EDTSevere Thunderstorm WarningGYXCumberland58 min

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 6.8 hours before the alert went out and 133 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 2002-07-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 111 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 2002-07-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 81 square meters per square second.193958Sfc1 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
111 J/kg
Mixed-layer CIN
-116 J/kg
Mixed-layer LCL
996 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
81 m²/s²
0-3 km storm-relative helicity
72 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

Open this sounding in Storm Lab

Nearby

Severe Thunderstorm Watches in Massachusetts, 2002Severe Thunderstorm Watches in New Hampshire, 2002Severe Thunderstorm Watches in Connecticut, 2002Every severe thunderstorm watch in 2002

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.