Global Weather & Climate Center
  • Home
  • About
    • GWCC Is
    • Where in the World is GWCC?
    • Contact Us
  • Global Regions
    • Africa
    • Atlantic Ocean and Caribbean Sea
    • Central and Eastern Pacific Ocean
    • Central and South America
    • Europe
    • North America
    • Indian Ocean and Asia
    • Polar Regions
    • South Pacific Ocean and Australia
    • Western Pacific Ocean
  • Weather
    • Applied Meteorology >
      • Air Quality
      • Aviation
      • Droughts
      • Fire Weather
      • Flooding
      • Geosciences
      • Global Environmental Topics
      • Weather Observations
    • Weather Education
    • Weather History
    • Weather Research
    • Weather Safety and Preparedness
    • Severe Weather
    • Social Sciences
    • Space Weather
    • Tropical Cyclones
    • Weather and Health
    • Winter Weather
  • Climate
  • GWCC Global Imagery Archive
  • GWCC Window to the World
    • GOES-16 Live Satellite Imagery Portal
    • GOES-16 ABI Channel Description and Examples
    • GOES-16 ABI Satellite Products
    • GOES-17 Live Satellite Imagery Portal
    • Himawari-8 Live Satellite Imagery Portal
    • Meteosat-11 Live Satellite Imagery Portal
  • Kids Corner
    • Kindergarten to 5th Grade
    • 6th to 12th grade
    • Fun Facts & Weather Trivia
    • GWCC Weather Radar Education
    • GWCC Wheel of Science

Weather History Topics
Take A Look Back At Many Different Past Weather Events!

Revisiting the Palm Sunday Tornado Outbreak of 1920 (credit: Harold Brooks -- NSSL)

3/31/2020

0 Comments

 
Picture

This is the 100th anniversary of what's probably one of the six biggest tornado days in the last 140 years in the US. Palm Sunday 1920 killed 380 people, with major fatality tornadoes from the Chicago metro to West Point, GA. Surface map from that morning. pic.twitter.com/yw0pwjvRnw

— Harold Brooks (@hebrooks87) March 28, 2020
Let us spin the clock back a century… On March 28th, 1920, one of the largest tornado outbreaks in the modern era affected a large swath of states in the Deep South and Midwest in what became known as the Palm Sunday tornado outbreak of 1920. This outbreak saw the spawn of 37 confirmed total tornadoes of which 16 of them were rated F3 or higher (based on the traditional Fujita scale for tornado strength). All in all, 380 lives were lost during the event. Of course, this was long before any weather forecasting technology or public awareness for severe weather came about as the current-day National Weather Service (then known as the U.S. Weather Bureau) didn’t implement the watch/warning system until 1953. 1920s forecasting guidelines and techniques were still being crafted and given the accepted regulations at the time, were rather crude and vague which did not convey as much information as the public.
 
The surface analysis shared above depicts an environment conducive for such intense convective activity to occur. A mature lee cyclone developed east of the Rockies and traversed over the central Plains. A trailing cold front sagged southward over the southern Plains while a warm front moved poleward across the mid-south and well into the Midwest states. The result is a setup which provided ample moisture fetch across many of the southern and Midwestern states and, coupled with decently warm temperatures and favorable winds, set the stage for a potentially dangerous outbreak. Also, let’s recall that during the 1920s, the science of meteorology was nowhere near the levels of today so parameters such as storm helicity, jet stream dynamics, and instability were not known. Forecasters could not convey such information so they relied on basic weather observations. Severe thunderstorms were numerous across many states including Michigan, Indiana, and Illinois were multiple tornadoes touched down and caused considerable damage to farms and houses in rural areas to buildings and established business in the more concentrated suburbs and cities. Storm motion was rapid; most storms had forward motion exceeding 50 mph which is presumed to be due to strong steering flows aloft.
 
Since writing this piece, this event has risen to relevance in recent times as the latest severe weather outbreak that affected states such as Missouri, Iowa, and Illinois. March 28th, 2020 had similar features observed on the surface analyses and upper-air charts such that the environmental setup favored organized development of surface-based supercells. The Storm Prediction Center issued a 15% risk of significant tornadoes across portions of central Illinois even…
 
Since the devastating outbreak in 1920, weather forecasting, modeling, and verification has gone to great lengths to provide the useful information needed by the general public to prepare and be weather-aware for significant severe weather events. But whether it is 1920 or 2020, the mission of forecasters remains the same: Protecting life and property.
 
For more interesting weather history topics, be sure to click here!
 
Stay healthy! 

© 2020 Meteorologist Brian Matilla
0 Comments



Leave a Reply.

    Archives

    March 2020
    February 2020
    January 2020
    October 2019
    September 2019
    July 2019
    May 2019
    April 2019
    March 2019
    February 2019
    January 2019
    December 2018
    November 2018
    October 2018
    September 2018
    August 2018
    July 2018
    June 2018
    February 2018
    January 2018
    December 2017
    November 2017
    October 2017
    September 2017
    August 2017
    July 2017
    June 2017
    May 2017
    April 2017
    March 2017
    February 2017
    January 2017
    December 2016
    November 2016
    October 2016
    September 2016


    RSS Feed

© 2020, Global Weather and Climate Center
ALL RIGHTS RESERVED
​Webmaster - Stephen Piechowski
  • Home
  • About
    • GWCC Is
    • Where in the World is GWCC?
    • Contact Us
  • Global Regions
    • Africa
    • Atlantic Ocean and Caribbean Sea
    • Central and Eastern Pacific Ocean
    • Central and South America
    • Europe
    • North America
    • Indian Ocean and Asia
    • Polar Regions
    • South Pacific Ocean and Australia
    • Western Pacific Ocean
  • Weather
    • Applied Meteorology >
      • Air Quality
      • Aviation
      • Droughts
      • Fire Weather
      • Flooding
      • Geosciences
      • Global Environmental Topics
      • Weather Observations
    • Weather Education
    • Weather History
    • Weather Research
    • Weather Safety and Preparedness
    • Severe Weather
    • Social Sciences
    • Space Weather
    • Tropical Cyclones
    • Weather and Health
    • Winter Weather
  • Climate
  • GWCC Global Imagery Archive
  • GWCC Window to the World
    • GOES-16 Live Satellite Imagery Portal
    • GOES-16 ABI Channel Description and Examples
    • GOES-16 ABI Satellite Products
    • GOES-17 Live Satellite Imagery Portal
    • Himawari-8 Live Satellite Imagery Portal
    • Meteosat-11 Live Satellite Imagery Portal
  • Kids Corner
    • Kindergarten to 5th Grade
    • 6th to 12th grade
    • Fun Facts & Weather Trivia
    • GWCC Weather Radar Education
    • GWCC Wheel of Science