Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 7, NWS Boston/Norton, MA

May 18, 2000Franklin County, Massachusetts

NWS Boston/Norton, MA issued this severe thunderstorm warning at May 18, 2000, 5:20 PM EDT for Franklin County, Massachusetts. It was in force for 55 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: May 18, 2000, 5:20 PM EDT (21:20 UTC)
Expired: May 18, 2000, 6:15 PM EDT
In force: 55 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 21:24 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
May 18, 6:07 PM EDT	Thunderstorm Wind 50 E	Bernardston, MA
May 18, 6:15 PM EDT	Thunderstorm Wind 50 E	Ashfield, MA

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
May 18, 5:00 PM EDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 9.3 hours before the alert went out and 192 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 977 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 131 m²/s²
0-3 km storm-relative helicity: 245 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KBOX 182121
SVRBOS
MAC011-182215-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
520 PM EDT THU MAY 18 2000

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

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

* UNTIL 615 PM EDT.

* AT 518 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 8 MILES WEST OF MONROE...OR ABOUT 2 MILES NORTH
  OF NORTH ADAMS...MOVING EAST AT 45 MPH.

* OTHER LOCATIONS IN THE WARNING AREA INCLUDE  SHELBURNE...ORANGE... 
MONTAGUE...DEERFIELD...CHARLEMONT...AND COLRAIN.

SEVERE THUNDERSTORMS PRODUCE WINDS STRONG EiNOUGH TO KNOCK DOWN TREES
AND POWER LINES. MOVE INDOORS AND STAY AWAY FROM WINDOWS.
$$

JWD/DRV

The office that day

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

Issued	Product	Office	Counties	Lasted
May 18, 5:49 PM EDT	Severe Thunderstorm Warning	BOX	Hampden, Hampshire	56 min
May 18, 6:14 PM EDT	Severe Thunderstorm Warning	BOX	Franklin, Worcester	46 min

Nearby

Severe Thunderstorm Warnings in Massachusetts, 2000 Every severe thunderstorm warning in 2000

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.