Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2024
Severe Thunderstorm Warning 21, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this severe thunderstorm warning at Jun 14, 2024, 3:59 PM EDT for 4 counties in Massachusetts. It was in force for 27 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jun 14, 2024, 3:59 PM EDT (19:59 UTC)
- Expired
- Jun 14, 2024, 4:26 PM EDT
- In force
- 27 min
- Issued by
- NWS Boston/Norton, MA
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Franklin County, MA, Hampden County, MA, Hampshire County, MA, Worcester County, MA
The radar
The Boston radar (KBOX), 118 km from the middle of the area, began a volume at 20:03 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 nearest sounding before it
Albany, NY (KALY), launched 12:00Z, 8.0 hours before the alert went out and 118 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
- 168 J/kg
- Mixed-layer CIN
- -122 J/kg
- Mixed-layer LCL
- 1066 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 164 m²/s²
- 0-3 km storm-relative helicity
- 167 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted.
324 WUUS51 KBOX 141959 SVRBOX MAC011-013-015-027-142100- /O.NEW.KBOX.SV.W.0021.240614T1959Z-240614T2100Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Boston/Norton MA 359 PM EDT Fri Jun 14 2024 The National Weather Service in Boston/Norton has issued a * Severe Thunderstorm Warning for... Western Worcester County in central Massachusetts... Southeastern Hampshire County in western Massachusetts... Southeastern Franklin County in western Massachusetts... Northeastern Hampden County in western Massachusetts... * Until 500 PM EDT. * At 358 PM EDT, a severe thunderstorm was located over Amherst, moving northeast at 10 mph. HAZARD...60 mph wind gusts and penny size hail. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. * Locations impacted include... Amherst, Northampton, South Hadley, Belchertown, Ware, Granby, Hadley, Sunderland, Hatfield, Hardwick, Leverett, Shutesbury, Pelham, Petersham, and New Salem. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. Large hail and damaging winds and continuous cloud to ground lightning is occurring with this storm. Move indoors immediately. Lightning is one of nature's leading killers. Remember, if you can hear thunder, you are close enough to be struck by lightning. Torrential rainfall is occurring with this storm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 4221 7253 4239 7264 4251 7241 4231 7226 TIME...MOT...LOC 1958Z 237DEG 7KT 4236 7250 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...0.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ Loconto
1 follow-up statement
880 WWUS51 KBOX 142026 SVSBOX Severe Weather Statement National Weather Service Boston/Norton MA 426 PM EDT Fri Jun 14 2024 MAC011-013-015-027-142036- /O.CAN.KBOX.SV.W.0021.000000T0000Z-240614T2100Z/ Worcester MA-Hampshire MA-Franklin MA-Hampden MA- 426 PM EDT Fri Jun 14 2024 ...THE SEVERE THUNDERSTORM WARNING FOR WESTERN WORCESTER... SOUTHEASTERN HAMPSHIRE...SOUTHEASTERN FRANKLIN AND NORTHEASTERN HAMPDEN COUNTIES IS CANCELLED... The storm which prompted the warning has weakened below severe limits, and has exited the warned area. Therefore, the warning has been cancelled. However gusty winds and heavy rain are still possible with this thunderstorm. LAT...LON 4221 7253 4239 7264 4251 7241 4231 7226 TIME...MOT...LOC 2018Z 237DEG 7KT 4239 7244 $$ Loconto
The office that day
Everything else NWS Boston/Norton, MA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 14, 3:17 AM EDT | Small Craft Advisory | BOX | 20 hr | |
| Jun 14, 1:15 PM EDT | Special Marine Warning | BOX | 60 min | |
| Jun 14, 1:22 PM EDT | Severe Thunderstorm Warning | BOX | Essex, Middlesex, Norfolk, Plymouth, Suffolk, Worcester | 53 min |
| Jun 14, 2:11 PM EDT | Special Marine Warning | BOX | 64 min |
Nearby
Severe Thunderstorm Warnings in Massachusetts, 2024Every severe thunderstorm warning in 2024
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.