National Weather Service United States Department of Commerce

Gray - Portland, ME

Weather Forecast Office

GYX Winter Weather Forecasts

Weather.gov > Gray - Portland, ME > GYX Winter Weather Forecasts

Snow Amount Potential
Experimental -
 
Expected Snowfall - Official NWS Forecast
Point Range
Expected Snowfall - Official NWS Forecast
What's this?		 High End Amount
1 in 10 Chance (10%) of Higher Snowfall
Maximum Potential Snow Accumulation
What's this?
Low End Amount
9 in 10 Chance (90%) of Higher Snowfall
Minimum Potential Snow Accumulation
What's this?

Low End Amount – 9 in 10 Chance (90%) of Higher Snowfall

 

This map depicts a reasonable lower-end snowfall amount for the time period shown on the graphic, based on many computer model simulations of possible snowfall totals. This lower amount is an unlikely scenario with a 9 in 10, or 90% chance that more snow will fall, and only a 1 in 10, or 10% chance that less snow will fall. This number can help serve as a lower-end scenario for planning purposes.

Expected Snowfall - Official NWS Forecast

 

This map is the official NWS snowfall forecast in inches during the time period shown on the graphic. This snowfall amount is determined by NWS forecasters to be the most likely outcome based on evaluation of data from computer models, satellite, radar, and other observations.

High End Amount – Only a 1 in 10 Chance (10%) of Higher Snowfall

 

This map depicts a reasonable upper-end snowfall amount for the time period shown on the graphic, based on many computer model simulations of possible snowfall totals. This higher amount is an unlikely scenario, with only a 1 in 10, or 10% chance that more snow will fall, and a 9 in 10, or 90% chance that less snow will fall. This number can help serve as an upper-end scenario for planning purposes.
 
The purpose of these experimental probabilistic snowfall products is to provide customers and partners a range of snowfall possibilities, in complement to existing NWS deterministic snowfall graphics, to better communicate forecast uncertainties during winter weather events. For more information visit this project's Product/Service Description Document, and please provide us your feedback here.
Percent Chance That Snow Amounts Will Be Greater Than...
Experimental -
 
What's this?

Percent Chance That Snow Amounts Will Be Greater Than

 

This series of maps shows the probability (that is, the likelihood) that snowfall will equal or exceed specific amounts during the time period shown on the graphic. These forecasts are based on many computer model simulations of possible snowfall totals.
Hover over thumbnails below to view larger image.
>=0.1"
>=0.1"		 >=1"
>=1"		 >=2"
>=2"		 >=4"
>=4"		 >=6"
>=6"		 >=8"
>=8"		 >=12"
>=12"		 >=18"
>=18"

Page Last Updated: 11:13 AM EST Nov 23, 2020

Snowfall Totals by Location
Experimental -
 
What's this?

Snowfall Totals by Location

 

These tables show the snowfall forecast for individual locations, and provide the same information as the graphics on this web page, just shown in a different way. All of these values are valid for the same time period as depicted on the graphics.
County:
 
Ice Accumulation Potential
 

Expected Ice Accumulation - Official NWS Forecast

This is the elevated flat surface ice accumulation. It is not radial/line ice. Radial/line ice is typically 39% of the elevated flat surface ice. For more information on this, see this module.
Most Likely Ice Accumulation

What's this?

Most Likely Ice Accumulation

Represents our official ice forecast in inches within the next one to three days. The ice accumulation amounts are provided in ranges.
Other Snow/Ice Information
Onset of Precipitation End Timing of Precipitation
Precipitation Onset
Precipitation End Time
What's this? What's this?
Winter Storm Severity Index
*** Experimental ***		 NDFD Graphic Forecast Displays
Winter Precipitation Onset
NDFD Graphical Forecast Viewer
What's this? What's this?
Storm Track Reported Snow/Ice Totals
Storm Total Ice Graphic
Latest snow report
What's this? What's this?

Precipitation Onset

Most likely time of precipitation onset (rain, snow, sleet, freezing rain).This information is provided when we issue a Warning or Advisory for expected snow or ice accumulation; typically six to 24 hours in advance.

Precipitation End Time

Most likely time of precipitation ending (rain, snow, sleet, freezing rain).This information is provided when we issue a Warning or Advisory for expected snow or ice accumulation; typically six to 24 hours in advance.

Reported

As snow and/or ice reports come into the NWS (you can email reports to gyx.webmaster@noaa.gov or Tweet to @NWSGray), we will pass them on here. With the map linked here, and the supporting reports below it, you can keep tabs on how much has fallen.

 

Gray, ME Products
HAZARDOUS WEATHER OUTLOOK FORECAST DISCUSSION SPECIAL WEATHER STATEMENT PUBLIC INFORMATION STATEMENT

 

 

 

 

**Prototype Under Development - not to be relied on for operational decision making**
Snow to Liquid Ratio
Gives a representation of how wet, normal, or dry a snow will be.
Example: 11 to 1 means for every inch of liquid that falls, 11 inches of snow can be expected.
Red Shading (Wet Snow): Snow ratio of 1-10 to 1.
Green Shading (Normal Snow): Snow ratio of 10-16 to 1.
Blue Shading (Dry Snow): Snow ratio of 16+ to 1.

 

 

 
Snow Amount Potential
Experimental -
 
Expected Snowfall - Official NWS Forecast
Point Range
Expected Snowfall - Official NWS Forecast
What's this?		 High End Amount
1 in 10 Chance (10%) of Higher Snowfall
Maximum Potential Snow Accumulation
What's this?
Low End Amount
9 in 10 Chance (90%) of Higher Snowfall
Minimum Potential Snow Accumulation
What's this?

Low End Amount – 9 in 10 Chance (90%) of Higher Snowfall

 

This map depicts a reasonable lower-end snowfall amount for the time period shown on the graphic, based on many computer model simulations of possible snowfall totals. This lower amount is an unlikely scenario with a 9 in 10, or 90% chance that more snow will fall, and only a 1 in 10, or 10% chance that less snow will fall. This number can help serve as a lower-end scenario for planning purposes.

Expected Snowfall - Official NWS Forecast

 

This map is the official NWS snowfall forecast in inches during the time period shown on the graphic. This snowfall amount is determined by NWS forecasters to be the most likely outcome based on evaluation of data from computer models, satellite, radar, and other observations.

High End Amount – Only a 1 in 10 Chance (10%) of Higher Snowfall

 

This map depicts a reasonable upper-end snowfall amount for the time period shown on the graphic, based on many computer model simulations of possible snowfall totals. This higher amount is an unlikely scenario, with only a 1 in 10, or 10% chance that more snow will fall, and a 9 in 10, or 90% chance that less snow will fall. This number can help serve as an upper-end scenario for planning purposes.
 
The purpose of these experimental probabilistic snowfall products is to provide customers and partners a range of snowfall possibilities, in complement to existing NWS deterministic snowfall graphics, to better communicate forecast uncertainties during winter weather events. For more information visit this project's Product/Service Description Document, and please provide us your feedback here.
Percent Chance That Snow Amounts Will Be Greater Than...
Experimental -
 
What's this?

Percent Chance That Snow Amounts Will Be Greater Than

 

This series of maps shows the probability (that is, the likelihood) that snowfall will equal or exceed specific amounts during the time period shown on the graphic. These forecasts are based on many computer model simulations of possible snowfall totals.
Hover over thumbnails below to view larger image.
>=0.1"
>=0.1"		 >=1"
>=1"		 >=2"
>=2"		 >=4"
>=4"		 >=6"
>=6"		 >=8"
>=8"		 >=12"
>=12"		 >=18"
>=18"
Snow Amount Potential
Experimental -
 
Expected Snowfall - Official NWS Forecast
Point Range
Expected Snowfall - Official NWS Forecast
What's this?		 High End Amount
1 in 10 Chance (10%) of Higher Snowfall
Maximum Potential Snow Accumulation
What's this?
Low End Amount
9 in 10 Chance (90%) of Higher Snowfall
Minimum Potential Snow Accumulation
What's this?

Low End Amount – 9 in 10 Chance (90%) of Higher Snowfall

 

This map depicts a reasonable lower-end snowfall amount for the time period shown on the graphic, based on many computer model simulations of possible snowfall totals. This lower amount is an unlikely scenario with a 9 in 10, or 90% chance that more snow will fall, and only a 1 in 10, or 10% chance that less snow will fall. This number can help serve as a lower-end scenario for planning purposes.

Expected Snowfall - Official NWS Forecast

 

This map is the official NWS snowfall forecast in inches during the time period shown on the graphic. This snowfall amount is determined by NWS forecasters to be the most likely outcome based on evaluation of data from computer models, satellite, radar, and other observations.

High End Amount – Only a 1 in 10 Chance (10%) of Higher Snowfall

 

This map depicts a reasonable upper-end snowfall amount for the time period shown on the graphic, based on many computer model simulations of possible snowfall totals. This higher amount is an unlikely scenario, with only a 1 in 10, or 10% chance that more snow will fall, and a 9 in 10, or 90% chance that less snow will fall. This number can help serve as an upper-end scenario for planning purposes.
 
The purpose of these experimental probabilistic snowfall products is to provide customers and partners a range of snowfall possibilities, in complement to existing NWS deterministic snowfall graphics, to better communicate forecast uncertainties during winter weather events. For more information visit this project's Product/Service Description Document, and please provide us your feedback here.
Percent Chance That Snow Amounts Will Be Greater Than...
Experimental -
 
What's this?

Percent Chance That Snow Amounts Will Be Greater Than

 

This series of maps shows the probability (that is, the likelihood) that snowfall will equal or exceed specific amounts during the time period shown on the graphic. These forecasts are based on many computer model simulations of possible snowfall totals.
Hover over thumbnails below to view larger image.
>=0.1"
>=0.1"		 >=1"
>=1"		 >=2"
>=2"		 >=4"
>=4"		 >=6"
>=6"		 >=8"
>=8"		 >=12"
>=12"		 >=18"
>=18"
Long-Range Forecast
 

Days 4-7
Day 4 Winter Weather Outlook Day 5 Winter Weather Outlook
Day 4 Winter Weather Outlook Day 5 Winter Weather Outlook
 
Day 6 Winter Weather Outlook Day 7 Winter Weather Outlook
Day 6 Winter Weather Outlook Day 7 Winter Weather Outlook
 
Days 4-5 Forecast Precipitation Days 6-7 Forecast Precipitation
Days 4-5 Precip Days 6-7 Precip
 
 

Days 6-10
Temperature  Precipitation
6-10 day temperature 6-10 day precipitation
 
 

Days 8-14
TEMPERATURE  PRECIPITATION
8-14 day temperature 8-14 day precipitation
 
 

Week 3-4

TEMPERATURE

PRECIPITATION
Week 3-4 Temperature Week 3-4 precipitation

From the Northeast River Forecast Center


 

Northeast Daily Snowfall


 

Northeast Daily Snow Depth
 

From the National Operational Hydrologic Remote Sensing Center
   
Zoomable National Maps from NOHRSC  
   
New Hampshire and Western Maine Snow Depth New Hampshire and Western Maine Snow Water Equivalent

 

Forecast Information for Preparation and Planning
 
Graphical Forecast
NDFD Forecast
 
National Forecast Maps
WPC Winter Forecast
 
Winter Weather Maps
WPC Winter Forecast
* For point specific forecasts, please return to the main page and see the map there.

Narrative Discussions
Area Forecast Discussion - Portland | Caribou | Boston | Burlington

National Forecast Discussions (national in scope)

Text Forecast Products
Point Forecast for selected Cities - Portland | Caribou | Boston | Burlington
Area Forecast for selected Zones (tabular) - Portland | Caribou | Boston | Burlington

Current Conditions and Information for Ongoing Storms
 
Northeast Radar
Northeast Radar
  
Satellite Imagery
Satellite Image
  
Current Obs
Satellite Image



Most Recent Storm Reports - PNS Product
Rain, Snow and Ice Reports - Portland | Caribou | Boston | Burlington

Most Recent Storm Reports - LSR Product
Rain, Snow and Ice Reports - Portland | Caribou | Boston | Burlington

Local/Regional Satellite
New England Sector GOES Satellite Imagery - NOAA NESDIS
Polar Orbit Imagery - NASA (not always available for NE U.S.)

Local/Regional Radar
Boston,MA Radar - NWS
Boston-Logan Airport Radar - FAA
Caribou, Maine Radar - NWS
Portland, Maine Radar - NWS
Northeast Regional Radar - NWS

Surface Analysis Maps
New England Surface Analysis (fronts and pressure) - NWS
Other U.S. Surface Analysis Maps (with help pages on symbols) - NWS

Weather Calculators
Wind Chill Calculator and Information

Post Event Information
 
Latest Observed Snowfall
Latest Observed Storm Total Snow
  
Regional Maps
Storm Total Snow Forecast
  
National Maps
Storm Total Snow Forecast
Local Data...

Most Recent Storm Reports
Rain, Snow and Ice Reports - Portland | Caribou | Boston | Burlington
Storm Damage and Impact Reports - Portland | Caribou | Boston | Burlington
CoCoRaHS Daily Precipitation Summary - Portland
Daily Hydrologic Observations - Portland | Caribou | Boston | Burlington

*Local Storm Reports and Public Information Statements will contain a summary information for short period of time after a storm.

 
Observed Precipitation and Snowfall Graphics

Local Archive Maps and Text Products

Northeast Current 24-hour Snowfall Map (gyxd Daily)
Northeast One Week Archive of Daily Snowfall Maps (gyxd Daily)
Northeast Current Snow Depth Map (gyxd Daily)
Northeast One Week Archive of Daily Snow Depth Maps (gyxd Daily)

Liquid or Liquid Equivalent Precipitation Graphics
Northeast Current 24-hour Liquid Precipitation Map (gyxd Daily)
Northeast One Week Archive of Liquid Precipitation Map (gyxd Daily)
Northeast Current Snow Depth Map (gyxd Daily)
Northeast One Week Archive of Daily Snow Depth Maps (gyxd Daily)
 

Other Data and Graphics
National Operational Hydrologic Remote Sensing Center (NOHRSC) -site for archive data

 

 

=
Climate

==
FAQ's

===
Snowfall Observations

====
Weather Spotters

=====
Office Webcam