Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 46, NWS Boston/Norton, MA

July 1, 2001Franklin County, Massachusetts

NWS Boston/Norton, MA issued this severe thunderstorm warning at Jul 1, 2001, 2:32 PM EDT for Franklin County, Massachusetts. It was in force for 43 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 1, 2001, 2:32 PM EDT (18:32 UTC)
Expired: Jul 1, 2001, 3:15 PM EDT
In force: 43 min
Issued by: NWS Boston/Norton, MA
Area: Whole counties

County Franklin County, MA

The radar

The Albany radar (KENX), 121 km from the middle of the area, began a volume at 18:32 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.

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
Jul 1, 2:15 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 6.5 hours before the alert went out and 102 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.

456 
WUUS51 KBOX 011832
SVRBOX
MAC011-011915-

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

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN FRANKLIN COUNTY IN WESTERN MASSACHUSETTS
    INCLUDING GREENFIELD

* UNTIL 315 PM EDT.

* AT 228 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 9 MILES SOUTHWEST OF MONROE...OR ABOUT 2 MILES
  EAST OF ADAMS...MOVING EAST AT 30 MPH.

* OTHER LOCATIONS IN THE WARNING AREA INCLUDE WARWICK...SHELBURNE...
  ROWE...ORANGE...NORTHFIELD...LEYDEN...HEATH...GILL...ERVING...
  COLRAIN...CHARLEMONT...BUCKLAND AND BERNARDSTON.

THIS THUNDERSTORM IS CAPABLE OF PRODUCING BOTH DAMAGING WIND AND HAIL
LARGE ENOUGH TO CAUSE SERIOUS INJURY AND SMASHED WINDOWS.

$$

NOTCHEY
VALLEE

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 30, 9:00 PM EDT	Severe Thunderstorm Warning	BOX	Norfolk	45 min
Jun 30, 9:30 PM EDT	Severe Thunderstorm Warning	BOX	Worcester	30 min
Jul 1, 3:24 PM EDT	Severe Thunderstorm Warning	BOX	Franklin, Worcester	66 min
Jul 1, 3:58 PM EDT	Severe Thunderstorm Warning	BOX	Essex	47 min
Jul 1, 4:22 PM EDT	Severe Thunderstorm Warning	BOX	Middlesex	38 min
Jul 1, 4:38 PM EDT	Severe Thunderstorm Warning	BOX	Worcester	52 min
Jul 1, 4:57 PM EDT	Severe Thunderstorm Warning	BOX	Essex	48 min

Nearby

Severe Thunderstorm Warnings in Massachusetts, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.