Hawaii received half its tornado warnings (ever) on this day in weather history
This Day In Weather History is a daily podcast by Chris Mei from The Weather Network, featuring stories about people, communities and events and how weather impacted them.
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Hawaii is not known for its tornadoes. On average, it's the second-last state in terms of tornado. Alaska takes the "least likely" crown.
Because of this, today's weather history topic is not nearly as catastrophic as other days. When a tornado does touch down in Hawaii, it's usually very weak.
On Tuesday, Mar. 17, 2020, Hawaii received two tornado warnings.
Tornado Warning including Kalaheo HI, Hanapepe HI, Ele'ele HI until 6:15 AM HST pic.twitter.com/oT98Q01jiG
Tornado Warning including Kalaheo HI, Hanapepe HI, Ele'ele HI until 6:15 AM HST NWSHonolulu on Twitter: "Tornado Warning including Kalaheo HI, Hanapepe HI, Ele'ele HI until 6:15 AM HST pic.twitter.com/oT98Q01jiG / Twitter"
— NWSHonolulu (@NWSHonolulu) NWSHonolulu on Twitter: "Tornado Warning including Kalaheo HI, Hanapepe HI, Ele'ele HI until 6:15 AM HST pic.twitter.com/oT98Q01jiG / Twitter"
According to Iowa Environmental Mesonet at Iowa State University, these warnings doubled Hawaii's tornado warnings ever recorded in the state. The data has been tracked since 1986.
The previous two warnings were for Kauai on Dec. 13, 2008, and Maui on Mar. 24, 2006.
Two Tornado Warnings in Hawaii today have double to total number of Tornado Warnings dating back to 2006 with the last one in 2008! #HIwx pic.twitter.com/ApB5C0gpc3
Two Tornado Warnings in Hawaii today have double to total number of Tornado Warnings dating back to 2006 with the last one in 2008! Bryant 'Storm' Sell on Twitter: "Two Tornado Warnings in Hawaii today have double to total number of Tornado Warnings dating back to 2006 with the last one in 2008! #HIwx pic.twitter.com/ApB5C0gpc3 / Twitter" Bryant 'Storm' Sell on Twitter: "Two Tornado Warnings in Hawaii today have double to total number of Tornado Warnings dating back to 2006 with the last one in 2008! #HIwx pic.twitter.com/ApB5C0gpc3 / Twitter"
— Bryant 'Storm' Sell (@stormsellwx) Bryant 'Storm' Sell on Twitter: "Two Tornado Warnings in Hawaii today have double to total number of Tornado Warnings dating back to 2006 with the last one in 2008! #HIwx pic.twitter.com/ApB5C0gpc3 / Twitter"
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The tornado warnings were a product of a "Kona storm," which is a type of cyclone in the Hawaiian Islands that's formed from westerly ("Kona") winds. Hawaii usually gets two or three of these storms annually. They usually come with heavy rain, hailstorms, high winds, waterspouts, and the very occasional tornado warning.
Don't see this every day. NWS Doppler radar out of Kauai picking up a possible #tornado moving into the island of Niihau. #hiwx pic.twitter.com/mYZWJ50r5q
Don't see this every day. NWS Doppler radar out of Kauai picking up a possible Jonathan Erdman on Twitter: "Don't see this every day. NWS Doppler radar out of Kauai picking up a possible #tornado moving into the island of Niihau. #hiwx pic.twitter.com/mYZWJ50r5q / Twitter" moving into the island of Niihau. Jonathan Erdman on Twitter: "Don't see this every day. NWS Doppler radar out of Kauai picking up a possible #tornado moving into the island of Niihau. #hiwx pic.twitter.com/mYZWJ50r5q / Twitter" Jonathan Erdman on Twitter: "Don't see this every day. NWS Doppler radar out of Kauai picking up a possible #tornado moving into the island of Niihau. #hiwx pic.twitter.com/mYZWJ50r5q / Twitter"
— Jonathan Erdman (@wxjerdman) Jonathan Erdman on Twitter: "Don't see this every day. NWS Doppler radar out of Kauai picking up a possible #tornado moving into the island of Niihau. #hiwx pic.twitter.com/mYZWJ50r5q / Twitter"
The second tornado warning that was issued that day was associated with a rotation that featured a “bounded weak echo region” (BWER) on radar. It looks like the eye of a storm. That apparent hole occurs when an updraft is so strong that rain isn’t able to fall within it.
These two tornado warnings didn't quite make it into actual tornadoes, but the storm left some impressive hail behind.
"The hailstone pictured above measured 4.25 inches in length. It was produced by a supercell thunderstorm on the island of Oahu, Hawaii, on Mar. 9, 2012, and is the largest hailstone on record in the Aloha State." Courtesy of National Weather Service
Hawaii has only received 40 confirmed tornadoes in its history, and no deaths have been associated with them. Their most costly tornado occurred on Jan. 28, 1971, with around $2.5 million worth of damages.
To hear more about this rare Hawaiin event, listen to today's episode of "This Day In Weather History."
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