Hail, Middlesex
- When
- July 12, 5:15 PM EST to 5:28 PM EST
- Where
- Middlesex County, Billerica
- Measured
- 1.5 in hail
- Reported by
- AMATEUR RADIO
- Coordinates
- 42.550, -71.267
An isolated severe thunderstorm dropped dime sized hail in Billerica, then strengthened as it moved southeast to Stoneham, where it produced hail as large as golf balls.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS BOX wrote it up.
An isolated severe thunderstorm dropped dime sized hail in Billerica, then strengthened as it moved southeast to Stoneham, where it produced hail as large as golf balls.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Boston/Norton, MA wrote its last area forecast discussion before the first event at Jul 12, 12:50 PM EST, 4 hours 25 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TAUNTON MA 150 PM EDT THU JUL 12 2001 UPR LOW OVER EASTERN CANADA SENDING ONE SHORTWAVE ACROSS FA THIS EVE. INSTAB FROM SOLAR HEATING CONTRIBUTING TO THIS EVE CONVECTION. SHRA/TSRA WILL DISSIPATE AFTER SUNSET. MORE OF THE SAME FRI AS UPR LO REMAINS IN PLACE AND PROGGS SHOWING YET ANOTHER H5 VORT MOVG ACROSS FA 18Z-00Z. PM CONVECTION NIL ON SAT AS UPR LOW FINALLY MOVES FAR ENUF TO dTHE NE SO THAT INFLUENCE ON REGION AT A MIN. MARINE HEADLINES REMAIN AS IS FOR NOW AS WINDS NEAR COAST BORDERLINE SCA. .BOX...SCA BOS HAR AND NAR BAY. FRANKLIN
The Boston radar (KBOX), 67 km away, was scanning. The volume nearest the first event began at 22:15 UTC.
1 hail. Local standard time, as filed.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Massachusetts in 2001Every state in 2001This day in weather historyWarnings in Massachusetts, July 2001
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 5258429.