Teletypewriters in action; transmitting and receiving weather data from the U.S.

Storm signals warning mariners in New York Harbor. The two flags in the center of the image are cautionary flags indicating strong offshore winds that could blow a vessel far from shore. In: "History of the Signal Service," 1884.

Signal flags used at Weather Bureau Display Stations. In: The Aims and Methods of Meteorological Work by Cleveland Abbe. In: Maryland Weather Service, Johns Hopkins Press, Baltimore, 1899. Vol I. Page 296.

Signal flags used at Weather Bureau Display Stations. In: The Aims and Methods of Meteorological Work by Cleveland Abbe. In: Maryland Weather Service, Johns Hopkins Press, Baltimore, 1899. Vol I. Page 296.

Storm signal In: The Climate and Weather of Baltimore by Oliver L. Fassig. In: Maryland Weather Service, Johns Hopkins Press, Baltimore, 1899. Vol. II. Page 304.

Weather Bureau Circular No. 1

"A Glass Weather Map of the United States Weather Bureau." In: "Our Weather" by Charles F. Talman, 1931. P. 224. Library Call Number MT151o.

"Weather forecasts for aviators" as bulletined at an airport station. Weather Bureau meteorologist preparing pilot briefing board at San Francisco. In: "The Realm of the Air" by Charles F. Talman, 1931. Library Call Number Library Call Number M/0030 T151r.

"A Weather Bureau Kiosk, in Union Square, San Francisco." In: "Meteorology" by Charles F. Talman, 1922. P. 320. Library Call Number M/0030 T151m.

A meteorologist at the console of the IBM 7090 electronic computer in the Joint Numerical Weather Prediction Unit. This computer was used to process weather data for short and long-range forecasts, analyses, and research.

View of the electronic computer complex at the National Meteorological Center.

Teletype operators at the U. S. Weather Bureau Communications Center.

Weather Bureau meteorologist reading a weather map hot off the facscimile machine.

Thomas D. Whitely inspecting facscimile map.

Thomas D. Whitely showing electronics racks of weather map facscimile machine.

Thomas D. Whitely working with electronic equipment.

Messenger boy Thomas D. Whitely ready to hurry to newspaper offices and radio stations with copy of latest forecast. Foreman John G. Strobel passing forecast to Whitely. In: The Sunday Star, Washington, D.C. Gravure Section. October 31, 1937.

Mimeographing copies of the forecast to pass on to bicycle messenger Thomas D. Whitely for carrying on to newspapers and radio stations. In: The Sunday Star, Washington, D.C. Gravure Section. October 31, 1937.

Early weather map published in: "Les Bases de la Meteorologie Dynamique" by M. le Dr. H. Hildebrand Hildebrandsson et M. Leon Teisserenc de Bort. Published 1900. Volume 2. Library Call No. M/0440 H642. Although published in 1900, the map displayed weather conditions for 7 May, 1865.

The daily weather map for January 22, 1922, a few days before the famous " Knickerbocker Storm" that caused havoc in Washington, D.C. All weather maps from the Nineteenth Century and Twentieth Century are on-line through the NOAA Central Library.

Meteorologist Scott Rudge preparing a weather forecast.

Central Illinois doppler radar display of tornadic supercell thunderstorm.

Bow echo with strong winds racing across Alabama observed by Birmingham doppler radar

Bow echo with strong winds racing across Alabama observed by Birmingham doppler radar

Genesis of tornadic thunderstorms that ravaged Oklahoma during the great Oklahoma Tornado Outbreak of 1999.

Tornadogenic storm during great Oklahoma Tornado Outbreak of 1999.

Tornadogenic storm formed during great Oklahoma Tornado Outbreak of 1999.

Tornadic thunderstorms ravaging Oklahoma during the great Oklahoma Tornado Outbreak of 1999.

Reflectivity image and storm relative velocity image showing location of tornado to the west of Union City during the great Oklahoma Tornado Outbreak of 1999. Hook echo at bottom left of reflectivity images is the location of the tornado.

Reflectivity image of supercell thunderstorm with tornadic hook echo SW of Amber during the great Oklahoma Tornado Outbreak of 1999.

Reflectivity image of tornado bearing hook echo to west of Pottawatomie.

Elongated appearance of reflectivity image showing highly sheared tornadogenic supercell storm with hook echo on SW quadrant of storm.

Reflectivity image of the same elongated supercell showing intensification and better defined hook echo.

Storm relative velocity doppler display showing rotation. Red area is wind blowing away from radar while green area is wind blowing toward radar. The tornado is ENE of the Norman WSFO and less than 30 km away.

An intense storm over Reno County. This storm produced golf ball size hail and severe winds.

3-D image of the Reno County intense thunder storm showing the intense part of t storm extending upward to over 40,000 feet. This image was derived from doppler radar observations of the storm

Supercell thunderstorms over central Kansas. These storms produced golf ball size hail with winds up to 70 mph.

A composite image showing a serial derecho as it travels across the Midwest. These are satellite water vapor images with lightning strikes overlaid. This storm produced widespread wind damage with winds of 80 to 100 mph in the most intense portions of the storm. Derecho is from the Spanish for "straight" and refers to the strong straight-line winds associated with these type of storms.

Regional radar image of derecho racing to the southeast across Kansas.

Aerial photograph geo-C25883793 of Texas coast following landfall of Hurricane Ike.

Aerial photograph geo-C25883805 of Texas coast following landfall of Hurricane Ike.

Aerial photograph geo-C25883831 of Texas coast following landfall of Hurricane Ike.

Aerial photograph geo-C25883869 of Texas coast following landfall of Hurricane Ike.

Radar display of frontal system with fairly intense precipitation extending across the Southeast United States.

Green flash flood warning box, yellow severe thunderstorm warning boxes, red tornado warnings (these red warning boxes are issued when rotation is indicated in the storm clouds) which coincided with the Bradford County tornado, darker yellow offshore marine warning.

Bats encountering supercell thunderstorm with hook echo indicative of tornado.

A north-south line of thunderstorms bisecting the southern Florida Peninsula.

Hurricane Humberto shortly after making landfall at High Island, Texas. The eye is still well-defined and rain-bands are well-defined. Although hitting shore as a minimal hurricane, it was one of the most rapidly intensifying hurricanes on record.

Part of a loop showing the evolution of Hurricane Lili on the Lake Charles radar .

Integrated rainfall totals from Tropical Storm Allison. Note white areas indicating over 25 inches of rain at Houston and south of Lafayette.