Alert archive / New Hampshire / Winter Storm Watches in 2021
Winter Storm Watch 7, NWS Gray, ME
NWS Gray, ME issued this winter storm watch at Dec 17, 2021, 2:47 AM EST for Cumberland County, Oxford County, York County, Maine; 10 counties in New Hampshire. It took effect at Dec 18, 2021, 3:00 PM EST. It was in force for .
The area
The counties it named.
The facts
- Issued
- Dec 17, 2021, 2:47 AM EST (07:47 UTC)
- In effect from
- Dec 18, 2021, 3:00 PM EST
- Expired
- Dec 17, 2021, 3:34 PM EST
- In force
- Issued by
- NWS Gray, ME
Counties Cumberland County, ME, Oxford County, ME, York County, ME, Belknap County, NH, Carroll County, NH, Cheshire County, NH, Coos County, NH, Grafton County, NH, Hillsborough County, NH, Merrimack County, NH, Rockingham County, NH, Strafford County, NH, Sullivan County, NH
The radar
The Portland,ME radar (KGYX), 94 km from the middle of the area, began a volume at 07:47 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
Gray, ME (KGYX), launched 00:00Z, 7.8 hours before the alert went out and 94 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
- 1095 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 284 m²/s²
- 0-3 km storm-relative helicity
- 312 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this winter storm watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Gray, ME wrote its last area forecast discussion before this winter storm watch went out at Dec 17, 12:41 AM EST, 2 hours 6 minutes earlier.
Area forecast discussion, Dec 17, 12:41 AM EST, 2 hours 6 minutes before
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</html>Hazardous weather outlook, Dec 17, 12:39 AM EST, 2 hours 8 minutes before
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</html>The office that day
Everything else NWS Gray, ME issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 17, 3:34 PM EST | Winter Storm Warning | GYX | Androscoggin, Cumberland, Franklin, Oxford, York | 42 hr |
| Dec 17, 3:34 PM EST | Winter Weather Advisory | GYX | Kennebec, Knox, Lincoln, Sagadahoc, Somerset, Waldo | 45 hr |
Nearby
Winter Storm Watches in New Hampshire, 2021Winter Storm Watches in Maine, 2021Every winter storm watch 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.