Annual Number
of Hurricanes
Making Landfall
on the 48 contiguous states:
Has Decreased
Since 1900
(NOAA AOML – Atlantic Oceanographic
and Meteorological Laboratory)
Annual Number
of Tornados
in all 50 States:
Has Decreased
Since 1954
(NOAA NWS – National Weather Service)
Drought
Conditions
for the 48 contiguous states:
Have Decreased
Since 1895
(Source: NOAA NCDC
– National Climatic Data Center,
now known as the NCEI
– National Centers for
Environmental Information)
Floods
for the 48 contiguous states
(Streams and Rivers):
Have Decreased
Since 1970
(USGS – United States
Geological Survey)
Acres Lost
to Wildfires
for all 50 U.S. States:
Decreased a lot
since the
1920's and 1930's
(Interagency Federal Wildland
Fire Policy Review Working Group
and the National Interagency Fire Center.)
Land Surface
Air Temperature
Extremes
for the 48 contiguous states
( Mainly Heat Waves and Cold Spells ):
Yearly High (TMAX)
Land Surface
Air Temperatures
Were Higher in the 1930s
Than They Have Been
in Recent Decades.
The Coldest
Yearly Low [TMIN]
Land Surface
Air Temperatures
Have Increased
Since 1900
(NOAA NCDC
– National Climatic Data Center,
now known as the NCEI
– National Centers for
Environmental Information)