Alert archive / Massachusetts / Coastal Flood Advisories in 2021
Coastal Flood Advisory 7, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this coastal flood advisory at May 29, 2021, 3:52 PM EDT for 6 counties in Massachusetts. It took effect at May 30, 2021, 2:00 AM EDT. It was in force for 2 hr.
The area
The counties it named.
The facts
- Issued
- May 29, 2021, 3:52 PM EDT (19:52 UTC)
- In effect from
- May 30, 2021, 2:00 AM EDT
- Expired
- May 30, 2021, 4:12 AM EDT
- In force
- 2 hr
- Issued by
- NWS Boston/Norton, MA
Counties Barnstable County, MA, Essex County, MA, Nantucket County, MA, Norfolk County, MA, Plymouth County, MA, Suffolk County, MA
The radar
The Boston radar (KBOX), 37 km from the middle of the area, began a volume at 19:53 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
Gray, ME (KGYX), launched 12:00Z, 7.9 hours before the alert went out and 211 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
- 513 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- -267 m²/s²
- 0-3 km storm-relative helicity
- 68 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this coastal flood advisory went out, 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 this coastal flood advisory went out at May 29, 2:00 PM EDT, 1 hour 52 minutes earlier.
Area forecast discussion, May 29, 2:00 PM EDT, 1 hour 52 minutes before
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</html>Hazardous weather outlook, May 29, 4:34 AM EDT, 11 hours 18 minutes before
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Local storm report, May 29, 11:04 AM EDT, 4 hours 48 minutes before
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</html>Local storm report, May 29, 3:25 PM EDT, 27 minutes before
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</html>The office that day
Everything else NWS Boston/Norton, MA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 29, 4:03 AM EDT | Coastal Flood Statement | BOX | Barnstable, Essex, Nantucket, Norfolk, Plymouth, Suffolk | 12 hr |
| May 29, 3:47 PM EDT | Small Craft Advisory | BOX | 51 hr |
Nearby
Coastal Flood Advisories in Massachusetts, 2021Every coastal flood 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.