20210621
13493900
1.0
FALSE
ThunderstormLightning
001
-18807881.180100
-14470857.690400
7296563.778300
11535890.153200
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
15573700
20260429
16051900
20000000
5000
FGDC
USWFS-STATE
Alaska
USWFS-THEME
Fire
Geospatial
Management
Esri ArcGIS 13.5.5.57366
U.S. Wildland Fire Service
U.S. Department of the Interior, U.S. Wildland Fire Service, Alaska (AFS)
AK Thunderstorm and Lightning Forecast Polygon
vector digital data
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)
1
-170
-130
71
54
2026-04-29T00:00:00
publication date
These features represent forecast thunderstorms and lightning. Thunderstorm and Lightning values range from zero (0) to 4 where 0 = None/Limited; 1 = Isolated or Slight Chance; 2 = Scattered or Chance T; 3 = Likely, and 4 = Dry Thunderstorms. For display purposes, values above zero are reclassified to 1.
<DIV STYLE="text-align:Left;"><DIV><P><SPAN>These features represent forecast thunderstorms and lightning. Thunderstorm and Lightning values range from zero (0) to 4 where 0 = None/Limited; 1 = Isolated or Slight Chance; 2 = Scattered or Chance T; 3 = Likely, and 4 = Dry Thunderstorms. For display purposes, values above zero are reclassified to 1.</SPAN></P></DIV></DIV>
NOAA National Weather Service, U.S. Department of the Interior, U.S. Wildland Fire Service, Alaska (AFS)
Alaska
climatologyMeteorologyAtmosphere
environment
Fire
Geospatial
Management
<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>
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.
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)
Enterprise Geodatabase Feature Class
https://www.weather.gov/images/arh/wxt/
https://fire.ak.blm.gov/arcgis/rest/services/MapAndFeatureServices/AK_DailyRiskAssessment/MapServer
external
0576d571b88726a2fdfa8864b82051fe558e87ba633a479a40fcdbadfac168c2
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)
True
U.S. Department of the Interior, U.S. Wildland Fire Service, Alaska (AFS)
dataset
EPSG
6.18.3(9.3.1.2)
3
Simple
FALSE
3
TRUE
FALSE
Thunderstorm and Lightning
Feature Class
3
Thunderstorm and Lightning forecast polygons and attributes.
AFS
OBJECTID
OBJECTID
OID
4
10
0
Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
Shape
Shape
Geometry
8
0
0
Feature geometry.
Esri
Coordinates defining the features.
ForecastDate
ForecastDate
String
12
0
0
Calendar date associated with the polygon.
AFS
Date, as text.
ForecastDay
ForecastDay
Integer
4
10
0
Forecast Day 1 = Today; Forecast Day 2 = Tomorrow; Forecast Day 3 = Day After Tomorrow.
AFS
1
3
Lightning
Lightning
Integer
4
10
0
No (0) or Yes (1)
AFS
0
1
SHAPE.AREA
SHAPE.AREA
Double
0
0
0
Feature shape.
Esri
Positive real numbers that are automatically generated.
SHAPE.LEN
SHAPE.LEN
Double
0
0
0
Feature length.
Esri
Positive real numbers that are automatically generated.
Geospatial data for AK Thunderstorm and Lightning forecast.
20260429
Last metadata review date: 20260429
<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.
Unknown, errors likely exist in the dataset.
Unknown, errors likely exist in the dataset.
Data coverage is restricted to Alaska PSA boundaries.
Unknown, errors likely exist in the dataset.
Data downloaded from NWS (https://www.weather.gov/images/arh/wxt) and processed with a python script. Thunderstorm and Lightning values range from zero (0) to 4 where 0 = None/Limited; 1 = Isolated or Slight Chance; 2 = Scattered or Chance T; 3 = Likely, and 4 = Dry Thunderstorms. Values above zero are reclassified to 1.
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)
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)