Alert archive / New Hampshire / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 45, NWS Boston/Norton, MA

July 1, 2001Cheshire County, New Hampshire

NWS Boston/Norton, MA issued this severe thunderstorm warning at Jul 1, 2001, 2:04 PM EDT for Cheshire County, New Hampshire. It was in force for 41 min. 2 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jul 1, 2001, 2:04 PM EDT (18:04 UTC)
Expired: Jul 1, 2001, 2:45 PM EDT
In force: 41 min
Issued by: NWS Boston/Norton, MA
Area: Whole counties

County Cheshire County, NH

The radar

The Boston radar (KBOX), 141 km from the middle of the area, began a volume at 18:03 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 was reported inside it

Time	Report	Where	Remark
Jul 1, 2:25 PM EDT	Thunderstorm Wind 50 E	Richmond, NH
Jul 1, 2:25 PM EDT	Hail 0.75	Richmond, NH

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 1, 10:30 AM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 6.1 hours before the alert went out and 131 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1136 J/kg
Mixed-layer CIN: -19 J/kg
Mixed-layer LCL: 609 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 34 m²/s²
0-3 km storm-relative helicity: 88 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 2.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

271 
WUUS51 KBOX 011804
SVRBOX
NHC005-011845-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
204 PM EDT SUN JUL 1 2001

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN CHESHIRE COUNTY IN SOUTHERN NEW HAMPSHIRE
    INCLUDING JAFFREY

* UNTIL 245 PM EDT.

* AT 203 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER WINCHESTER...OR ABOUT 11 MILES SOUTHEAST
  OF BRATTLEBORO...MOVING EAST AT 30 MPH.

* OTHER LOCATIONS IN THE WARNING AREA INCLUDE TROY...RINDGE...
  RICHMOND...HINSDALE AND FITZWILLIAM.

SEVERE THUNDERSTORMS PRODUCE LARGE HAIL AND WIND STRONG ENOUGH TO
KNOCK DOWN TREES AND POWER LINES. MOVE INDOORS AND STAY AWAY FROM
WINDOWS.

$$

NOTCHEY
VALLEE

The office that day

Everything else NWS Boston/Norton, MA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 1, 1:42 PM EDT	Severe Thunderstorm Warning	BOX	Hillsborough	48 min

Nearby

Severe Thunderstorm Warnings in New Hampshire, 2001 Every severe thunderstorm warning 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.