Use the forms below to enter parameters for the ranking program (Data up through April 2018)

Layer to map: 1 = SLP, 2 = Height at pressure level (select level), 3 = 2-meter Temp, 4 = Temp at pressure level (select level), 5 = U-wind component (select level), 6 = V-wind component (select level), 7 = Skin Temp, 8 = Precipitable Water, 9 = Relative Humidity (select level up to 300 mb), 10 = ERSST v.4 SSTs (Slow, through Dec 2017: 2.5 minutes), 11 = Wind Speed (select level), 12 = U-wind Shear (select levels), 13 = Height Thickness (select levels), 14 = Temperature Between Pressure Levels, 15 = Potential Velocity (0.2101 sigma), 16 = NASA Global Temps (VERY SLOW! 2.5-10 mins: Through Dec 2017), 17 = Specific Humidity, 18 = Combined SST/T2M [Temporarily Disabled], 19 = Heat Content, 20 = Cloud Cover, 21 = Preipitation Rate

Choose Theme (1-21):
Pressure Level: 0 = 1000mb, 1 = 925mb, 2 = 850mb, 3 = 700mb, 4 = 600mb, 5 = 500mb, 6 = 400mb, 7 = 300mb, 8 = 250mb, 9 = 200mb, 10 = 150mb, 11 = 100mb, 12 = 70mb, 13 = 50mb, 14 = 30mb, 15 = 20mb, 16 = 10mb

Note 1: use lower pressure level 0 for surface themes - layers 1, 3, 7, 8, and 10.
Note 2: use only lower pressure level for themes 2, 4, 5, 6, 9, and 11.
Note 3: use lower and upper pressure levels for themes 12, 13, and 14.

Lower pressure level:       Upper pressure level:
Bounding Coords for Rank Computation
North Lat Left Lon
South Lat Right Lon

This computes a single, rank value for the selected
time period. It does not affect the map. Remember that
longitude runs from 0 to 360 (no E-W). These values do not
affect the area to be mapped (see bottom of page). Click HERE for
a blank map with labelled grid lines.
Last month to start evaluation (e.g., 2 for Feb): Number of months (up to 12) to evaluate (e.g., 3 for Dec-Feb): Year of last month for assessment: Map Type: 1=Cyclindrical, 2=North Pole (NH Only), 3=Lambert Equal Area (Best for High Lats),
Manually Enter Map Bounds: 0=No, 1=Yes       North Lat South Lat Left Lon Right Lon
Note 1: Coords only used if map type is Cylindrical (1) or Lambert Equal Area (3).
Note 2: If Using Lambert Equal Area, make sure longitude spread is <= 50° in mid-latitudes.
Year range for trend analysis::  Start (999 is var default)     End
If you change the start date, it changes the start date for ranking maps too.
End date change does not affect end date for rankings.

Analysis Type: 1 = Ranks, 2 = Max Year, 3 = Min Year, 4 = Trend    Min/Max % >=
Raw data obtained from ESRL. Analysis may not be accurate. Use at your own risk!

   (to reset form, select theme 0 and press button)


Once it starts, DO NOT HIT REFRESH.
The program takes 1-2 minutes to run. If two levels are used, count on 2 minutes.
For NASA GISS temps, 2.5 minutes (1 month) to 10 minutes (12 months).
Wait for completion message and URL below, then scroll down to view map. ....