Daily and Interactive Degree-Day Maps of Western USA

Updated daily 9:15-10:08 am Pacific time

These maps are calculated using the GIS GRASS 5.0, and are based on 1) near-real time temperature data from numerous AgriMet , HydroMet, National Weather Service , RAWS, and Snotel weather stations, 2) historical average temperature data from numerous stations, 3) PRISM monthly max and min temperature maps, and 4) inverse-distance squared interpolations of differences between PRISM map-based and real-time degree-day calculations. See More info. on methodology for creating DD maps. Also try out our new Degree-day Mapping Calculator for more control over calculation and mapping options.

(NOTE: you may need to use your browser's RELOAD or REFRESH button for latest images)

Degree-Day Maps created daily using a 32 F. lower threshold:
Jan 1 - yesterday	Finished Map (click for larger version)
2004 (Current) GRASSLinks interactive GIS interface: (select region, size and click GO) Region US W US 5-state NW Idaho Montana Oregon Washington Wyoming Mapsize 2200 1600 1300 1000 800 600 400 250 150 pixels
Normals (Historical avgs) Region US W US 5-state NW Idaho Montana Oregon Washington Wyoming Mapsize 1600 1300 1000 800 600 400 250 150 pixels
Deviations from Normals Region US W US 5-state NW Idaho Montana Oregon Washington Wyoming Mapsize 1600 1300 1000 800 600 400 250 150 pixels

Degree-Day Maps created daily using a 41 F. lower threshold:
Jan 1 - yesterday	Finished Map (click for larger version)
2004 (Current) GRASSLinks interactive GIS interface: (select region, size and click GO) Region US W US 5-state NW Idaho Montana Oregon Washington Wyoming Mapsize 1600 1300 1000 800 600 400 250 150 pixels
Normals (Historical avgs) Region US W US 5-state NW Idaho Montana Oregon Washington Wyoming Mapsize 1600 1300 1000 800 600 400 250 150 pixels
Deviations from Normals Region US W US 5-state NW Idaho Montana Oregon Washington Wyoming Mapsize 1600 1300 1000 800 600 400 250 150 pixels

Degree-Day maps created daily using a 50 F. lower threshold:
Jan 1 - yesterday	Finished Map (click for larger version)
2004 (Current) GRASSLinks interactive GIS interface: (select size and click GO) Region US W US 5-state NW Idaho Montana Oregon Washington Wyoming Mapsize 1600 1300 1000 800 600 400 250 150 pixels
Normals (Historical avgs) Region US W US 5-state NW Idaho Montana Oregon Washington Wyoming Mapsize 1600 1300 1000 800 600 400 250 150 pixels
Deviations from Normals Region US W US 5-state NW Idaho Montana Oregon Washington Wyoming Mapsize 1600 1300 1000 800 600 400 250 150 pixels

[Home] [Intro] [NW DD Mapmaker] [DD Calc] [DD Models] [Links]