GISS April, 2011 found a very hot spot over Paraguay, which satellites didn’t show. The anomaly map below uses a baseline of 1981-2010
The UAH (and RSS) maps didn’t find this hot spot.
http://nsstc.uah.edu/climate/2011/april/APRIL%202011.png
Nor did weather underground. GISS reported 28.6C in Concepcion, Paraguay for April, while weather underground reported 25C. Looks like GISS reported about half of South America too high.
Richard Muller at Berkeley recently reported that GISS temperature numbers are golden.
















