Extreme events 1871-2008

in the new 20th century reanalysis, version 2

Brian Mapes, University of Miami


Here you select the variable of interest, timescale of event, epoch etc.
Then hit the Submit button below.

That will make a new page, with images (maps) of extreme values and the year, month, and day of their occurrence.
There, you can click on any location, in any of the map images, to launch a new Results page.
Results include the date and magnitude of the extreme event, and hot links to case study resources (satellite images, reanalysis fields).



Pick a variable: 2m temperature (C) precipitation rate (mm/day) runoff snow depth snow cover soil moisture snow water equivalent


Remove mean annual cycle? YES: extreme anomalies, in any season NHwarm (MJJASO) NHcool (NDJFMA)

(Not available here) No in DJF in MAM in JJA in SON

What time scale of event do you want? (based on a running mean of the time series):
1d 3d 5d 7d 15d 31d

Do you want a min or max extremum?
min max

Do you want extremes of the ensemble mean, or of a high member (mean+spread/2), or of a low member (mean-spread/2)?
mean -spread/2 (conservative for maxima; extreme for minima)
ensemble mean
mean +spread/2 (extreme for maxima; conservative for minima)


Pick an epoch for your extreme value:
1870s 1880s 1890s 1900s 1910s 1920s 1930s 1940s 1950s 1960s 1970s 1980s 1990s 2000s
1871-1900 1900-1930 1930-1960 1960-1990 1990-2008
1871-1940 1940-2008
1871-2008
Note: data cover 1871-2008