20210930
09235000
1.0
FALSE
AKSnowStatus
001
-18805507.067200
-14468892.419500
7296322.212100
11536322.212100
1
Projected
GCS_WGS_1984
Linear Unit: Meter (1.000000)
WGS_1984_Web_Mercator_Auxiliary_Sphere
<ProjectedCoordinateSystem xsi:type='typens:ProjectedCoordinateSystem' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xs='http://www.w3.org/2001/XMLSchema' xmlns:typens='http://www.esri.com/schemas/ArcGIS/3.5.0'><WKT>PROJCS["WGS_1984_Web_Mercator_Auxiliary_Sphere",GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137.0,298.257223563]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Mercator_Auxiliary_Sphere"],PARAMETER["False_Easting",0.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",0.0],PARAMETER["Standard_Parallel_1",0.0],PARAMETER["Auxiliary_Sphere_Type",0.0],UNIT["Meter",1.0],AUTHORITY["EPSG",3857]]</WKT><XOrigin>-20037700</XOrigin><YOrigin>-30241100</YOrigin><XYScale>10000</XYScale><ZOrigin>0</ZOrigin><ZScale>1</ZScale><MOrigin>0</MOrigin><MScale>1</MScale><XYTolerance>0.001</XYTolerance><ZTolerance>0.001</ZTolerance><MTolerance>0.001</MTolerance><HighPrecision>true</HighPrecision><WKID>102100</WKID><LatestWKID>3857</LatestWKID></ProjectedCoordinateSystem>
20260429
16210600
20260429
16372600
20000000
5000
FGDC
20260429
ArcGIS Metadata
1.0
Enterprise Geodatabase Feature Class
https://fire.ak.blm.gov/arcgis/rest/services/MapAndFeatureServices
withheld
https://geo.nsstc.nasa.gov/SPoRT/outgoing/cbb/alaska/geotiff/
U.S. Department of the Interior, U.S. Wildland Fire Service, Alaska (AFS)
GIS Specialist
PO Box 35005
Fort Wainwright
AK
99703
BLM_AK_AFS_GIS@blm.gov
US
001 907 356 5600
Contact by email.
U.S. Department of the Interior, U.S. Wildland Fire Service, Alaska (AFS)
U.S. Department of the Interior, U.S. Wildland Fire Service, Alaska (AFS)
USWFS-STATE
Alaska
USWFS-THEME
Fire
Geospatial
NONE
snow
snow absence
snow cover
snow presence
snow status
AK Snow Status Polygon
2026-04-29T00:00:00
U.S. Department of the Interior, U.S. Wildland Fire Service, Alaska (AFS)
U.S. Wildland Fire Service
U.S. Department of the Interior, U.S. Wildland Fire Service, Alaska (AFS)
GIS Specialist
PO Box 35005
Fort Wainwright
AK
99703
BLM_AK_AFS_GIS@blm.gov
US
001 907 356 5600
Contact by email.
U.S. Department of the Interior, U.S. Wildland Fire Service, Alaska (AFS)
U.S. Department of the Interior, U.S. Wildland Fire Service, Alaska (AFS)
U.S. Department of the Interior, U.S. Wildland Fire Service, Alaska (AFS)
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>This dataset is intended to help determine the date when to start and when to stop the calculation of fire weather indices. It is derived from two different datasets that depict the presence or absence of snow. This is a dataset is produced by combining two different data sources that represent snow status. Data source 1= IMS GeoTIFF rasters are downloaded and clipped to the Alaska Predictive Services Boundaries. The resulting raster is reclassified to values of 1 where snow is present (original value =4) and 0 where snow is absent (original values 1, 2, and 3). Data source 2 = NASA SPoRT Land Information System (LIS) Alaska Snow Depth at 2100 UTC are downloaded and reclassified to values of 3 where snow is present (original values of 1 or greater) and 0 where snow is absent (original values = 0). A value of "3" representing snow presence was selected so that users could identify areas where the two input data sets converge and diverge.</SPAN></P></DIV></DIV></DIV>
These data are intended to help determine the date when to start and when to stop the calculation of fire weather indices.
Alaska
environment
Fire
Geospatial
snow
snow absence
snow cover
snow presence
snow status
These data are provided “as is” and might contain errors or omissions. The User assumes the entire risk associated with its use of these data and bears all responsibility in determining whether these data are fit for the User’s intended use. The information contained in these data is dynamic and may change over time. The data are not better than the sources from which they were derived, and both scale and accuracy may vary across the data set. These data might not have the accuracy, resolution, completeness, timeliness, or other characteristics appropriate for applications that potential users of the data may contemplate.
None, these data are considered public domain.
2026-04-29T00:00:00
publication date
Esri ArcGIS 13.5.5.57366
1
-170
-130
71
54
NASA Short-term Prediction Research and Transition Center (SPoRT), U.S. National Ice Center, U.S. Department of the Interior, U.S. Wildland Fire Service, Alaska (AFS)
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>These data are provided “as is” and might contain errors or omissions. The User assumes the entire risk associated with its use of these data and bears all responsibility in determining whether these data are fit for the User’s intended use. The information contained in these data is dynamic and may change over time. The data are not better than the sources from which they were derived, and both scale and accuracy may vary across the data set. These data might not have the accuracy, resolution, completeness, timeliness, or other characteristics appropriate for applications that potential users of the data may contemplate.</SPAN></P></DIV></DIV></DIV>
U.S. Department of the Interior, U.S. Wildland Fire Service, Alaska (AFS)
GIS Specialist
PO Box 35005
Fort Wainwright
AK
99703
BLM_AK_AFS_GIS@blm.gov
US
001 907 356 5600
Contact by email.
U.S. Department of the Interior, U.S. Wildland Fire Service, Alaska (AFS)
U.S. Department of the Interior, U.S. Wildland Fire Service, Alaska (AFS)
U.S. Department of the Interior, U.S. Wildland Fire Service, Alaska (AFS)
Last metadata review date: 20260429
Unknown, errors likely exist in the dataset.
Unknown, errors likely exist in the dataset.
Unknown, errors likely exist in the dataset.
Data coverage is restricted to Alaska PSA boundaries.
US National Ice Center = https://usicecenter.gov/File/DownloadArchive?prd=65
NASA AK-LIS Snow Depth = https://nssrgeo.ndc.nasa.gov/SPoRT/modeling/lis/alaska/geotiff/
This is a dataset is produced by combining two different data sources that represent snow status. Data source 1= IMS GeoTIFF downloaded and clipped to the Alaska Predictive Services Boundaries. The resulting raster is reclassified to values of 1 where snow is present (original value =4) and 0 where snow is absent (original values 1, 2, and 3).
Data source 2 = NASA SPoRT Land Information System (LIS) Alaska Snow Depth at 2100 UTC rasters are downloaded and reclassified to values of 3 where snow is present (original values of 1 or greater) and 0 where snow is absent (original values = 0). A value of "3" representing snow presence was selected so that users could identify areas where the two input data sets converge and diverge.
The reclassified rasters are added together using map algebra procedures. The resulting combined dataset is converted to a polygon feature class.
Data updated daily.
2026-04-29T00:00:00
U.S. Department of the Interior, U.S. Wildland Fire Service, Alaska (AFS)
GIS Specialist
PO Box 35005
Fort Wainwright
AK
99703
BLM_AK_AFS_GIS@blm.gov
US
001 907 356 5600
Contact by email.
U.S. Department of the Interior, U.S. Wildland Fire Service, Alaska (AFS)
U.S. Department of the Interior, U.S. Wildland Fire Service, Alaska (AFS)
U.S. Department of the Interior, U.S. Wildland Fire Service, Alaska (AFS)
AK Snow Status
Alaska Snow Status features and attributes.
Feature Class
3732
AFS
OBJECTID
Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
OBJECTID
OID
4
10
0
Shape
Feature geometry.
Esri
Coordinates defining the features.
SHAPE
Geometry
8
0
0
gridcode
Original pixel (grid) values.
AFS
0
0
USWFS
1
1
USWFS
3
3
USWFS
4
4
USWFS
gridcode
Integer
4
10
0
SNOWSTATUS
Snow Status
AFS
Snow Free - USNIC and AK-LIS
Snow Free - USNIC and AK-LIS
USWFS
Snow Present - USNIC
Snow Present - USNIC
USWFS
Snow Present - AK-LIS
Snow Present - AK-LIS
USWFS
Snow Present - USNIC and AK-LIS
Snow Present - USNIC and AK-LIS
USWFS
SNOWSTATUS
String
255
0
0
STATUSDATE
Date of Snow Status values
Date, as text.
STATUSDATE
AFS
String
255
0
0
SHAPE.AREA
SHAPE.AREA
Esri
Area, automatically generated.
SHAPE.AREA
Double
0
0
0
SHAPE.LEN
SHAPE.LEN
Esri
Automatically generated.
SHAPE.LEN
Double
0
0
0
These data represent snow status (snow present or snow absent) for Alaska.
dataset
EPSG
6.18.3(9.3.1.2)
3732
Simple
FALSE
3732
TRUE
FALSE
<DIV STYLE="text-align:Left;"><DIV><P><SPAN>These data are provided “as is” and might contain errors or omissions. The User assumes the entire risk associated with its use of these data and bears all responsibility in determining whether these data are fit for the User’s intended use. The information contained in these data is dynamic and may change over time. The data are not better than the sources from which they were derived, and both scale and accuracy may vary across the data set. These data might not have the accuracy, resolution, completeness, timeliness, or other characteristics appropriate for applications that potential users of the data may contemplate.</SPAN></P></DIV></DIV>
None, these data are considered public domain.
U.S. Department of the Interior, U.S. Wildland Fire Service, Alaska (AFS)
GIS Specialist
PO Box 35005
Fort Wainwright
AK
99703
BLM_AK_AFS_GIS@blm.gov
US
001 907 356 5600
Contact by email.
U.S. Department of the Interior, U.S. Wildland Fire Service, Alaska (AFS)
U.S. Department of the Interior, U.S. Wildland Fire Service, Alaska (AFS)
U.S. Department of the Interior, U.S. Wildland Fire Service, Alaska (AFS)