Alert archive / New Hampshire / Severe Thunderstorm Watches in 2005

Severe Thunderstorm Watch 418

June 6, 20054 counties in Massachusetts; 7 counties in New Hampshire; Orange County, Windham County, Windsor County, Vermont

The Storm Prediction Center issued this severe thunderstorm watch at Jun 6, 2005, 3:20 PM EDT for 4 counties in Massachusetts; 7 counties in New Hampshire; Orange County, Windham County, Windsor County, Vermont. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Jun 6, 2005, 3:20 PM EDT (19:20 UTC)
Expired
Jun 6, 2005, 8:00 PM EDT
In force
5 hr
Issued by
the Storm Prediction Center

Counties Franklin County, MA, Hampden County, MA, Hampshire County, MA, Worcester County, MA, Belknap County, NH, Carroll County, NH, Cheshire County, NH, Grafton County, NH, Hillsborough County, NH, Merrimack County, NH, Sullivan County, NH, Orange County, VT, Windham County, VT, Windsor County, VT

The radar

The Boston radar (KBOX), 122 km from the middle of the area, began a volume at 19:20 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

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

IssuedProductOfficeCountiesLasted
Jun 6, 3:36 PM EDTSevere Thunderstorm WarningALYBennington, Windham54 min
Jun 6, 4:14 PM EDTSevere Thunderstorm WarningBOXFranklin46 min
Jun 6, 4:27 PM EDTSevere Thunderstorm WarningALYWindham67 min
Jun 6, 4:37 PM EDTSevere Thunderstorm WarningBOXCheshire38 min
Jun 6, 4:45 PM EDTSevere Thunderstorm WarningBOXHampden, Hampshire45 min
Jun 6, 4:58 PM EDTSevere Thunderstorm WarningBOXFranklin47 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, 7.3 hours before the alert went out and 115 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 2005-06-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 468 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 2005-06-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 113 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
468 J/kg
Mixed-layer CIN
-112 J/kg
Mixed-layer LCL
1043 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
113 m²/s²
0-3 km storm-relative helicity
125 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.3

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 6, 10:28 AM EDTMesoscale DiscussionSPC62 min
Jun 6, 12:30 PM EDTTornado WatchSPC6 hr
Jun 6, 4:35 PM EDTMesoscale DiscussionSPC55 min

Nearby

Severe Thunderstorm Watches in New Hampshire, 2005Severe Thunderstorm Watches in Connecticut, 2005Severe Thunderstorm Watches in Massachusetts, 2005Every severe thunderstorm watch in 2005

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.