Central Western/Central Squall Line of March 23rd/24th 1921

The Central Western/Central Squall Line of March 23rd/24th, 1921 was the first true severe weather event since The Demonic Summer of 1920. It was a severe squall line that ravaged the Central Western and Central provinces that was reclassified as a Derecho after the term was created in 1961, but it is not part of the Derecho Directory due to occurring before the term, so it does not officially count.

Meteorological History
Storms began to fire up during the late afternoon hours of March 23rd, 1921. These individual cells merged into a squall line at around 11 PM. This line begun to meet the criteria of a Derecho at around 11:30 PM, and surged across the border at 1:00 AM into the Central Province. It moved through the region and begun weakening at 5:00 AM, and at 6:00 AM the system no longer met the criteria.

Pre-Development Report (CWWS)
While it is currently calm in the Central Western world region, thunderstorms are expected to form this afternoon. Some may be strong to severe, so those near the Central Western/Central border should be on the lookout for the development of severe weather.

Pre-Development Report (CPWS)
Thunderstorms are expected to develop over the course of the day near the CW/C border. Sunny conditions are expected to give way to overcast skies by noon, and storms will begin to develop a couple hours later.

Post-Storm Report (CWWS)
An intense squall line battered the far eastern regions of the Central Western world province into the Central World Province during the late evening and early morning hours of March 23rd and 24th. Although it wasn't at it's most intense state before crossing the border, the squall line still cause a lot of damage, and also resulted in 2 deaths within the province.

Post-Storm Report (CPWS)
An intense squall line crossed over the Central Province border during the early morning hours of March 24th. After crossing the border, a weak F-1 tornado was spun up, but dissipated before causing any damage. The winds from the storm, along with lightning, caused quite a bit of damage, and killed 10 people within the Central Province.

Reclassification Report (1961, SWWS)
Along with 3 other squall lines that occured around the world, the squall line of March 23rd, 1921 has been reclassified under a new meteorological term, a derecho. The criteria for a derecho is as follows: the line of storms must last 6 hours or more and have sustained winds of 60 miles per hour throughout the event to be classified as a derecho.