Alert archive / Massachusetts / Wind Advisories in 2025
Wind Advisory 13, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this wind advisory at Aug 20, 2025, 1:46 PM EDT for Barnstable County, Dukes County, Nantucket County, Massachusetts. It took effect at Aug 21, 2025, 5:00 PM EDT. It was in force for 21 hr.
The area
The counties it named.
The facts
- Issued
- Aug 20, 2025, 1:46 PM EDT (17:46 UTC)
- In effect from
- Aug 21, 2025, 5:00 PM EDT
- Expired
- Aug 22, 2025, 2:00 PM EDT
- In force
- 21 hr
- Issued by
- NWS Boston/Norton, MA
Counties Barnstable County, MA, Dukes County, MA, Nantucket County, MA
The radar
The Boston radar (KBOX), 88 km from the middle of the area, began a volume at 17:47 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
Brookhaven, NY (KOKX), launched 12:00Z, 5.8 hours before the alert went out and 222 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
- 773 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 99 m²/s²
- 0-3 km storm-relative helicity
- 140 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
814 WWUS71 KBOX 201746 NPWBOX URGENT - WEATHER MESSAGE National Weather Service Boston/Norton MA 146 PM EDT Wed Aug 20 2025 MAZ022>024-210700- /O.NEW.KBOX.WI.Y.0013.250821T2100Z-250822T1800Z/ Barnstable MA-Dukes MA-Nantucket MA- Including the cities of Vineyard Haven, Chatham, Provincetown, Nantucket, and Falmouth 146 PM EDT Wed Aug 20 2025 ...WIND ADVISORY IN EFFECT FROM 5 PM THURSDAY TO 2 PM EDT FRIDAY... * WHAT...Northeast winds 15 to 30 mph with gusts up to 50 mph expected. * WHERE...Barnstable MA, Dukes MA, and Nantucket MA Counties. * WHEN...From 5 PM Thursday to 2 PM EDT Friday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and some power outages may result. * ADDITIONAL DETAILS...Highest winds expected near Nantucket and the outer portions of Cape Cod. PRECAUTIONARY/PREPAREDNESS ACTIONS... Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution. && $$ Visit us at http://www.weather.gov/box KP
3 follow-up statements
634 WWUS71 KBOX 210621 NPWBOX URGENT - WEATHER MESSAGE National Weather Service Boston/Norton MA 221 AM EDT Thu Aug 21 2025 MAZ022>024-211930- /O.CON.KBOX.WI.Y.0013.250821T2100Z-250822T1800Z/ Barnstable MA-Dukes MA-Nantucket MA- Including the cities of Chatham, Nantucket, Falmouth, Vineyard Haven, and Provincetown 221 AM EDT Thu Aug 21 2025 ...WIND ADVISORY REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON TO 2 PM EDT FRIDAY... * WHAT...Northeast winds 15 to 25 mph with gusts up to 45 mph expected. * WHERE...Barnstable MA, Dukes MA, and Nantucket MA Counties. * WHEN...From 5 PM this afternoon to 2 PM EDT Friday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and some power outages may result. PRECAUTIONARY/PREPAREDNESS ACTIONS... Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution. && $$ Visit us at http://www.weather.gov/box Hrencecin
380 WWUS71 KBOX 211810 NPWBOX URGENT - WEATHER MESSAGE National Weather Service Boston/Norton MA 210 PM EDT Thu Aug 21 2025 MAZ022>024-221200- /O.CON.KBOX.WI.Y.0013.250821T2100Z-250822T1800Z/ Barnstable MA-Dukes MA-Nantucket MA- Including the cities of Falmouth, Chatham, Provincetown, Nantucket, and Vineyard Haven 210 PM EDT Thu Aug 21 2025 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 2 PM EDT FRIDAY... * WHAT...Northeast winds 15 to 30 mph with gusts up to 50 mph expected. * WHERE...Barnstable MA, Dukes MA, and Nantucket MA Counties. * WHEN...Until 2 PM EDT Friday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and some power outages may result. * ADDITIONAL DETAILS...Highest winds expected near Nantucket and the outer portions of Cape Cod. PRECAUTIONARY/PREPAREDNESS ACTIONS... Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution. Secure outdoor objects. && $$ Visit us at http://www.weather.gov/box Mensch
154 WWUS71 KBOX 220603 NPWBOX URGENT - WEATHER MESSAGE National Weather Service Boston/Norton MA 203 AM EDT Fri Aug 22 2025 MAZ022>024-221800- /O.CON.KBOX.WI.Y.0013.000000T0000Z-250822T1800Z/ Barnstable MA-Dukes MA-Nantucket MA- Including the cities of Falmouth, Chatham, Vineyard Haven, Nantucket, and Provincetown 203 AM EDT Fri Aug 22 2025 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON... * WHAT...North winds 20 to 30 mph with gusts up to 40 mph. * WHERE...Barnstable MA, Dukes MA, and Nantucket MA Counties. * WHEN...Until 2 PM EDT this afternoon. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and some power outages may result. PRECAUTIONARY/PREPAREDNESS ACTIONS... Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution. Secure outdoor objects. && $$ Visit us at http://www.weather.gov/box Hrencecin
The office that day
Everything else NWS Boston/Norton, MA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 20, 2:31 PM EDT | Gale Warning | BOX | 48 hr | |
| Aug 20, 2:31 PM EDT | Small Craft Advisory | BOX | 4 days | |
| Aug 20, 2:42 PM EDT | Coastal Flood Advisory | BOX | Dukes, Nantucket | 32 min |
| Aug 20, 2:42 PM EDT | Coastal Flood Advisory | BOX | Bristol, Dukes, Nantucket | 59 hr |
| Aug 20, 3:14 PM EDT | Coastal Flood Advisory | BOX | Dukes, Nantucket | 35 hr |
Nearby
Wind Advisories in Massachusetts, 2025Every wind advisory 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.