This is the home page for all that the National Weather Service (NWS) publishes online. Drill down through different links to finds lots of useful weather, climate, and related information.
HMM (20/06/28)
Category: climatology/historical weather
National Weather Service (NWS) National Center Research and Event Summaries
NHC Publications – https://www.nhc.noaa.gov/data/publications.php
NHC Storm Reports/Summaries – https://www.nhc.noaa.gov/data/tcr/
SPC Published papers (refereed and non-refereed) – https://www.spc.noaa.gov/publications/
Both the Storm Prediction Center (SPC) and the National Hurricane Center (NHC) prepare event summaries and/or publish research papers. Links for these can be found above.
HMM/200620
NASA MODIS (Moderate Resolution Imaging Spectroradiometer) Satellite Imagery
This site contains current and historical (back to February 2000) satellite imagery from the polar-orbiting Terra and Aqua satellites. Flying at relatively low altitude, these satellites are able to provide very high-definition cloud, ocean, and land-based images of specific geographical regions. Because the satellite orbits as the Earth spins beneath it, there are gaps in coverage between successive satellite passes.
NOAA NCEP (CPC) – High and low temperature maps and departures
This page shows high and low temperatures (observed and departure from average) across the U.S. Unfortunately, the images are 36 to 48 hours old.
NCEP/CDC Temperature Maps
Aeris Weather
Site contains much weather information, including “departure from average temperature” maps. You’ll just have to do some clicking of the many links provided.