Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 53, NWS Boston/Norton, MA

July 10, 2001Hampden County, Hampshire County, Massachusetts

NWS Boston/Norton, MA issued this severe thunderstorm warning at Jul 10, 2001, 4:30 PM EDT for Hampden County, Hampshire County, Massachusetts. It was in force for 30 min. 3 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 10, 2001, 4:30 PM EDT (20:30 UTC)
Expired: Jul 10, 2001, 5:00 PM EDT
In force: 30 min
Issued by: NWS Boston/Norton, MA
Area: Whole counties

Counties Hampden County, MA, Hampshire County, MA

The radar

The Albany radar (KENX), 123 km from the middle of the area, began a volume at 20:31 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
Jul 10, 4:35 PM EDT	Hail 1	South Amherst, MA
Jul 10, 5:00 PM EDT	Hail 1	Ware, MA
Jul 10, 5:09 PM EDT	Hail 1	Chester, 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
Jul 10, 3:00 PM EDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 8.5 hours before the alert went out and 109 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: 135 J/kg
Mixed-layer CIN: -126 J/kg
Mixed-layer LCL: 1127 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 91 m²/s²
0-3 km storm-relative helicity: 98 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KBOX 102030
SVRBOX

MAC013-015-102100-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
430 PM EDT TUE JUL 10 2001

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN HAMPDEN COUNTY IN WESTERN MASSACHUSETTS
    INCLUDING CHICOPEE
  SOUTHEASTERN HAMPSHIRE COUNTY IN WESTERN MASSACHUSETTS

* UNTIL 500 PM EDT.

* AT 428 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER GRANBY...OR ABOUT 4 MILES SOUTH OF
  AMHERST...MOVING EAST AT 35 MPH.

* OTHER LOCATIONS IN THE WARNING AREA INCLUDE WILBRAHAM...WARE...
  SOUTH HADLEY...PALMER...LUDLOW...HATFIELD?...HADLEY AND BELCHERTOWN.

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

$$

DUNHAM
NOTCHEY

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 10, 3:50 PM EDT	Severe Thunderstorm Warning	BOX	Hampshire	40 min
Jul 10, 4:52 PM EDT	Severe Thunderstorm Warning	BOX	Worcester	38 min
Jul 10, 5:13 PM EDT	Severe Thunderstorm Warning	BOX	Hampden, Hampshire	47 min
Jul 10, 5:29 PM EDT	Severe Thunderstorm Warning	BOX	Worcester	46 min
Jul 10, 5:49 PM EDT	Severe Thunderstorm Warning	BOX	Middlesex	41 min
Jul 10, 6:16 PM EDT	Severe Thunderstorm Warning	BOX	Norfolk, Worcester	44 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.