Use the forms below to enter parameters for the analog forecast application

Look for Analog Matches in This Box

North Lat West Lon
South Lat East Lon
Forecast is for This Box

North Lat West Lon
South Lat East Lon
Last month to start evaluation (e.g., 4 for April):
Number of Months (up to 12) to evaluate for analog matches (e.g., 2 for Mar-Apr):
Year of last month to start evaluation:
Months Ahead (up to 12) to generate forecast (e.g., 2 for Jun forecast from Mar-Apr analogs):

For example, to evaluate Mar-Apr, 2010, data to forecast Jun 2010,
choose 4, 2, 2010, 2 (from top to bottom).
Theme to Forecast: 1 = SLP, 2 = 500 mb Height, 3 = 2-Meter Temps, and 4 = 925 mb temps
Choose Variable (1-4):
Weighting for Analog Selections (0-100):


Auto Weight (0 = No, 1 = Yes):        Detrend Data (0 = No, 1 = Yes):        RMS Weighting Exponent

Note 1: If the analysis OR forecast box is entirely over land, program might crash due to no SST data.
Note 2: Weights must be whole numbers. Total need not add to 100.
Note 3: Auto weighting uses a multiple linear regression to find the best historical correlations. Manual weights are ignored.
Note 4: RMS Weighting Exponent to use in calculation for pattern matching. Default is 2. Use whole number from 1 to 5.
Mapping ID Number:
This number must be greater than 300. Change value for each new query to ensure files are not overwritten

   (to reset form, select "Theme to Forecast" 0 and press button)

Once it starts, DO NOT HIT REFRESH.
The program takes between 1 and 11 minutes to run,
depending on the size of the analysis area.
Wait for completion message and URL links below.