Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2025
Severe Thunderstorm Warning 13, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this severe thunderstorm warning at May 17, 2025, 6:59 PM EDT for Franklin County, Hampden County, Hampshire County, Massachusetts. It was in force for 42 min. 4 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- May 17, 2025, 6:59 PM EDT (22:59 UTC)
- Expired
- May 17, 2025, 7:41 PM EDT
- In force
- 42 min
- Issued by
- NWS Boston/Norton, MA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Franklin County, MA, Hampden County, MA, Hampshire County, MA
The radar
The Albany radar (KENX), 100 km from the middle of the area, began a volume at 22:59 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 17, 7:07 PM EDT | HAIL 1 | 1 Sw Williamsburg, MA | |
| May 17, 7:10 PM EDT | TSTM WND DMG | Williamsburg, MA | Wires and utility pole down on Mountain Street at Laural Road. |
| May 17, 7:18 PM EDT | TSTM WND DMG | Greenfield, MA | Tree down along the 100 block of Maple Street in Greenfield. Relayed by amateur radio. |
| May 17, 7:30 PM EDT | TSTM WND DMG | Hatfield, MA | Reported tree down on wires on School Street and on Hill Street. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 11.0 hours before the alert went out and 168 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 810 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 93 m²/s²
- 0-3 km storm-relative helicity
- 69 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
108
WUUS51 KBOX 172259
SVRBOX
MAC011-013-015-180000-
/O.NEW.KBOX.SV.W.0013.250517T2259Z-250518T0000Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Boston/Norton MA
659 PM EDT Sat May 17 2025
The National Weather Service in Boston/Norton has issued a
* Severe Thunderstorm Warning for...
Hampshire County in western Massachusetts...
Central Franklin County in western Massachusetts...
Northwestern Hampden County in western Massachusetts...
* Until 800 PM EDT.
* At 659 PM EDT, a severe thunderstorm was located over Worthington,
or 15 miles west of Northampton, moving east at 25 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to trees and power lines.
* Locations impacted include...
Holyoke, Amherst, Northampton, Greenfield, Deerfield, South Hadley,
Easthampton, Belchertown, Montague, Granby, Southampton, Hadley,
Sunderland, Hatfield, Northfield, Williamsburg, Huntington,
Buckland, Conway, and Shelburne.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4238 7303 4238 7301 4253 7297 4264 7236
4226 7235 4227 7300 4231 7300 4231 7303
4232 7305
TIME...MOT...LOC 2259Z 269DEG 21KT 4239 7296
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Hrencecin2 follow-up statements
676 WWUS51 KBOX 172326 SVSBOX Severe Weather Statement National Weather Service Boston/Norton MA 726 PM EDT Sat May 17 2025 MAC011-013-015-180000- /O.CON.KBOX.SV.W.0013.000000T0000Z-250518T0000Z/ Hampshire MA-Franklin MA-Hampden MA- 726 PM EDT Sat May 17 2025 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM EDT FOR CENTRAL HAMPSHIRE...CENTRAL FRANKLIN AND NORTH CENTRAL HAMPDEN COUNTIES... At 725 PM EDT, a severe thunderstorm was located over Williamsburg, or near Northampton, moving east at 25 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to trees and power lines. Locations impacted include... Holyoke, Amherst, Northampton, Greenfield, Deerfield, South Hadley, Easthampton, Belchertown, Montague, Granby, Hadley, Sunderland, Hatfield, Northfield, Williamsburg, Huntington, Conway, Shelburne, Leverett, and Erving. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4254 7287 4264 7236 4226 7235 4228 7288 TIME...MOT...LOC 2325Z 269DEG 21KT 4239 7275 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...<.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ CH
056 WWUS51 KBOX 172341 SVSBOX Severe Weather Statement National Weather Service Boston/Norton MA 741 PM EDT Sat May 17 2025 MAC011-013-015-172350- /O.CAN.KBOX.SV.W.0013.000000T0000Z-250518T0000Z/ Hampshire MA-Franklin MA-Hampden MA- 741 PM EDT Sat May 17 2025 ...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL HAMPSHIRE...CENTRAL FRANKLIN AND NORTH CENTRAL HAMPDEN COUNTIES IS CANCELLED... The storm which prompted the warning has weakened below severe limits, and no longer poses an immediate threat to life or property. Therefore, the warning has been cancelled. LAT...LON 4254 7287 4264 7236 4226 7235 4228 7288 TIME...MOT...LOC 2339Z 269DEG 21KT 4239 7262 $$ Hrencecin
The office that day
Everything else NWS Boston/Norton, MA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 17, 2:06 AM EDT | Small Craft Advisory | BOX | 4 days | |
| May 17, 6:20 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampden, Hampshire | 40 min |
Nearby
Severe Thunderstorm Warnings in Massachusetts, 2025Every severe thunderstorm warning in 2025
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.