Allen Pearson was the Director of the

National Severe Storms Forecast Center The Storm Prediction Center (SPC) is a US government agency that is part of the National Centers for Environmental Prediction (NCEP), operating under the control of the National Weather Service (NWS), which in turn is part of the National Oce ...

from 1965 to 1979 and began to collaborate with Tetsuya Theodore "Ted" Fujita on

tornado A tornado is a violently rotating column of air that is in contact with both the surface of the Earth and a cumulonimbus cloud or, in rare cases, the base of a cumulus cloud. It is often referred to as a twister, whirlwind or cyclone, alt ...

physical characteristics soon after the 1970

Lubbock Tornado Portions of Lubbock, Texas, were struck by a powerful multiple-vortex tornado after nightfall on May 11, 1970, resulting in 26 fatalities and at least $135 million in damage. It was in its time the costliest tornado in U.S. history, da ...

. They bounced ideas off each other and the

Fujita scale The Fujita scale (F-Scale; ), or Fujita–Pearson scale (FPP scale), is a scale for rating tornado intensity, based primarily on the damage tornadoes inflict on human-built structures and vegetation. The official Fujita scale category is deter ...

(F-scale) and later the FPP scale was the result. Pearson had devised the computerized encoding of the tornado base, which included the F-P-P estimates. Pearson's major role was to get the cooperation of the NWS State Climatologists and to extend the computerized data base backwards to the 1950s. Pearson was awarded the

Department of Commerce The United States Department of Commerce is an executive department of the U.S. federal government concerned with creating the conditions for economic growth and opportunity. Among its tasks are gathering economic and demographic data for bus ...

's gold medal in 1974 for "...forecasting of severe local storms...which included the Super Outbreak of April 3–4, 1974". Pearson successfully lobbied the

United States Congress The United States Congress is the legislature of the federal government of the United States. It is bicameral, composed of a lower body, the House of Representatives, and an upper body, the Senate. It meets in the U.S. Capitol in Washi ...

in the mid-1970s for satellite readout and computer equipment that the

National Weather Service The National Weather Service (NWS) is an agency of the United States federal government that is tasked with providing weather forecasts, warnings of hazardous weather, and other weather-related products to organizations and the public for the ...

could not provide. This ultimately led to the sophisticated methodology in use today at the Storm Prediction Center in

Norman, Oklahoma Norman () is the third-largest city in the U.S. state of Oklahoma, with a population of 128,097 as of 2021. It is the largest city and the county seat of Cleveland County, Oklahoma, Cleveland County, and the second-largest city in the Oklahoma C ...

. He retired from the National Weather Service in 1981, and lived in Shreveport, Louisiana. Pearson was born on July 28, 1925, in

Mankato Mankato ( ) is a city in Blue Earth, Nicollet, and Le Sueur counties in the state of Minnesota. The population was 44,488 according to the 2020 census, making it the 21st-largest city in Minnesota, and the 5th-largest outside of the Minnea ...

Minnesota Minnesota () is a state in the upper midwestern region of the United States. It is the 12th largest U.S. state in area and the List of U.S. states and territories by population, 22nd most populous, with over 5.75 million residents. Minne ...

, served in the

U.S. Navy The United States Navy (USN) is the maritime service branch of the United States Armed Forces and one of the eight uniformed services of the United States. It is the largest and most powerful navy in the world, with the estimated tonnage o ...

and joined the

U.S. Weather Bureau The National Weather Service (NWS) is an Government agency, agency of the Federal government of the United States, United States federal government that is tasked with providing weather forecasts, warnings of hazardous weather, and other weathe ...

(now NOAA) in 1951. He holds an M.S. from the

University of Hawaii A university () is an institution of higher (or tertiary) education and research which awards academic degrees in several academic disciplines. ''University'' is derived from the Latin phrase ''universitas magistrorum et scholarium'', which ...

and B.A.S. from

University of California, Los Angeles The University of California, Los Angeles (UCLA) is a public university, public Land-grant university, land-grant research university in Los Angeles, California. UCLA's academic roots were established in 1881 as a Normal school, teachers colle ...

. He died on August 11, 2016 in

Bossier City Bossier City ( ) is a city in Bossier Parish in the northwestern region of the U.S. state of Louisiana in the United States. It is the second most populous city in the Shreveport–Bossier City metropolitan statistical area. In 2020, it had ...

, Louisiana, at the age of 91..

References

External links

Tornado Project
{{DEFAULTSORT:Pearson, Allen American meteorologists Department of Commerce Gold Medal 1925 births 2016 deaths National Weather Service people