Alert archive / Vermont / Severe Thunderstorm Watches in 2001

Severe Thunderstorm Watch 537

July 10, 20014 states

The Storm Prediction Center issued this severe thunderstorm watch at Jul 10, 2001, 12:45 PM EDT for 4 states. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Jul 10, 2001, 12:45 PM EDT (16:45 UTC)
Expired
Jul 10, 2001, 7:00 PM EDT
In force
6 hr
Issued by
the Storm Prediction Center
All 24 counties

Androscoggin County, ME, Cumberland County, ME, Franklin County, ME, Oxford County, ME, Somerset County, ME, Carroll County, NH, Coos County, NH, Grafton County, NH, Clinton County, NY, Essex County, NY, Franklin County, NY, Warren County, NY, Addison County, VT, Caledonia County, VT, Chittenden County, VT, Essex County, VT, Franklin County, VT, Grand Isle County, VT, Lamoille County, VT, Orange County, VT, Orleans County, VT, Rutland County, VT, Washington County, VT, Windsor County, VT

The radar

The Burlington radar (KCXX), 48 km from the middle of the area, began a volume at 16:47 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

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

IssuedProductOfficeCountiesLasted
Jul 10, 12:58 PM EDTSevere Thunderstorm WarningBTVGrand Isle32 min
Jul 10, 1:03 PM EDTSevere Thunderstorm WarningGYXCoos27 min
Jul 10, 1:11 PM EDTSevere Thunderstorm WarningBTVFranklin49 min
Jul 10, 1:14 PM EDTSevere Thunderstorm WarningBTVEssex46 min
Jul 10, 1:41 PM EDTSevere Thunderstorm WarningGYXCumberland, Oxford64 min
Jul 10, 1:49 PM EDTSevere Thunderstorm WarningBTVLamoille41 min
Jul 10, 1:53 PM EDTSevere Thunderstorm WarningBTVAddison52 min
Jul 10, 1:55 PM EDTSevere Thunderstorm WarningGYXSomerset65 min
Jul 10, 2:22 PM EDTSevere Thunderstorm WarningBTVRutland38 min
Jul 10, 2:31 PM EDTSevere Thunderstorm WarningBTVWashington29 min
Jul 10, 2:44 PM EDTSevere Thunderstorm WarningBTVAddison31 min
Jul 10, 2:51 PM EDTSevere Thunderstorm WarningBTVOrange24 min
Jul 10, 3:02 PM EDTSevere Thunderstorm WarningBTVRutland, Windsor43 min
Jul 10, 3:15 PM EDTSevere Thunderstorm WarningBTVOrange30 min
Jul 10, 3:34 PM EDTSevere Thunderstorm WarningGYXCoos56 min
Jul 10, 4:38 PM EDTSevere Thunderstorm WarningBTVRutland37 min
Jul 10, 4:47 PM EDTSevere Thunderstorm WarningBTVOrange28 min
Jul 10, 5:04 PM EDTSevere Thunderstorm WarningBTVWindsor41 min

The nearest sounding before it

Gray, ME (KGYX), launched 12:00Z, 4.8 hours before the alert went out and 195 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, Gray, ME at 12:00Z on 2001-07-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 45 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, Gray, ME at 12:00Z on 2001-07-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 19 square meters per square second.1939587897Sfc1 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
45 J/kg
Mixed-layer CIN
-206 J/kg
Mixed-layer LCL
1003 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
19 m²/s²
0-3 km storm-relative helicity
77 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 10, 3:00 PM EDTSevere Thunderstorm WatchSPCCheshire, Hillsborough, Merrimack, Rockingham, Strafford, Sullivan5 hr

Nearby

Severe Thunderstorm Watches in Vermont, 2001Severe Thunderstorm Watches in Maine, 2001Severe Thunderstorm Watches in New York, 2001Every severe thunderstorm watch in 2001

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.