Alert archive / Massachusetts / Wind Advisories in 2021
Wind Advisory 2, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this wind advisory at Jan 17, 2021, 9:23 AM EST for Nantucket County, Massachusetts. It was in force for 9 hr.
The area
The counties it named.
The facts
- Issued
- Jan 17, 2021, 9:23 AM EST (14:23 UTC)
- Expired
- Jan 17, 2021, 6:00 PM EST
- In force
- 9 hr
- Issued by
- NWS Boston/Norton, MA
County Nantucket County, MA
The radar
The Boston radar (KBOX), 120 km from the middle of the area, began a volume at 14:24 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, 2.4 hours before the alert went out and 242 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
- 939 m above ground
- 0-6 km bulk shear
- 65 kt
- 0-1 km storm-relative helicity
- 271 m²/s²
- 0-3 km storm-relative helicity
- 275 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
445 WWUS71 KBOX 171423 NPWBOX URGENT - WEATHER MESSAGE National Weather Service Boston/Norton MA 923 AM EST Sun Jan 17 2021 MAZ024-172230- /O.NEW.KBOX.WI.Y.0002.210117T1423Z-210117T2300Z/ Nantucket MA- Including the city of Nantucket 923 AM EST Sun Jan 17 2021 ...WIND ADVISORY IN EFFECT UNTIL 6 PM EST THIS EVENING... * WHAT...West winds 25 to 30 mph with gusts between 40 and 50 mph. * WHERE...Nantucket MA County. * WHEN...Until 6 PM EST this evening. * IMPACTS...Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$ Frank For more information from the National Weather Service visit https://weather.gov/box
2 follow-up statements
573 WWUS71 KBOX 171942 NPWBOX URGENT - WEATHER MESSAGE National Weather Service Boston/Norton MA 242 PM EST Sun Jan 17 2021 MAZ024-172300- /O.CON.KBOX.WI.Y.0002.000000T0000Z-210117T2300Z/ Nantucket MA- Including the city of Nantucket 242 PM EST Sun Jan 17 2021 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 6 PM EST THIS EVENING... * WHAT...West winds 20 to 30 mph with gusts between 40 and 50 mph. * WHERE...Nantucket MA County. * WHEN...Until 6 PM EST this evening. * IMPACTS...Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$ Frank For more information from the National Weather Service visit https://weather.gov/box
368 WWUS71 KBOX 172302 NPWBOX URGENT - WEATHER MESSAGE National Weather Service Boston/Norton MA 602 PM EST Sun Jan 17 2021 MAZ024-180015- /O.EXP.KBOX.WI.Y.0002.000000T0000Z-210117T2300Z/ Nantucket MA- Including the city of Nantucket 602 PM EST Sun Jan 17 2021 ...WIND ADVISORY HAS EXPIRED... Winds will continue to diminish as the night progresses, therefore the Wind Advisory has been allowed to expire. $$ For more information from the National Weather Service visit https://weather.gov/box
The office that day
Everything else NWS Boston/Norton, MA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 17, 6:01 PM EST | Small Craft Advisory | BOX | 9 hr |
Nearby
Wind Advisories in Massachusetts, 2021Every wind advisory in 2021
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.