When Storm Ulmer underwent bombogenesis and caused historic flooding
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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The March 2019 North American blizzard was a Colorado low that brought snow across the Plains and the Prairies. The storm came with strong winds and blizzard conditions, but the most significant impact followed the storm when all the snow melted and caused historic flooding.
The system started on March 8 in the Gulf of Alaska. On March 11, the system moved southeastward, bringing strong winds and heavy rain to California. That day, the storm was dubbed "Winter Storm Ulmer" because it was predicted that the storm would have a significant impact.
On March 12, the system continued to gain strength. That night and into the 13, the low underwent explosive intensification, which sounds as aggressive as it is. "Explosive intensification" is also called "bombogenesis" or "a weather bomb." They all are referring to the rapid deepening of an extratropical cyclonic low-pressure area.
GOESEast got a closer look at the #bombogenesis developing over the Central U.S. during this morning's sunrise. A bombogenesis occurs when a mid-latitude cyclone rapidly (or explosively) intensifies over a 24-hour period. Find out more: https://t.co/svMy2rP6aq pic.twitter.com/pjO6TvnAJo
NOAA Satellites on Twitter: "#GOESEast got a closer look at the #bombogenesis developing over the Central U.S. during this morning's sunrise. A bombogenesis occurs when a mid-latitude cyclone rapidly (or explosively) intensifies over a 24-hour period. Find out more: https://t.co/svMy2rP6aq pic.twitter.com/pjO6TvnAJo / Twitter" got a closer look at the NOAA Satellites on Twitter: "#GOESEast got a closer look at the #bombogenesis developing over the Central U.S. during this morning's sunrise. A bombogenesis occurs when a mid-latitude cyclone rapidly (or explosively) intensifies over a 24-hour period. Find out more: https://t.co/svMy2rP6aq pic.twitter.com/pjO6TvnAJo / Twitter" developing over the Central U.S. during this morning's sunrise. A bombogenesis occurs when a mid-latitude cyclone rapidly (or explosively) intensifies over a 24-hour period. Find out more: NOAA Satellites on Twitter: "#GOESEast got a closer look at the #bombogenesis developing over the Central U.S. during this morning's sunrise. A bombogenesis occurs when a mid-latitude cyclone rapidly (or explosively) intensifies over a 24-hour period. Find out more: https://t.co/svMy2rP6aq pic.twitter.com/pjO6TvnAJo / Twitter" NOAA Satellites on Twitter: "#GOESEast got a closer look at the #bombogenesis developing over the Central U.S. during this morning's sunrise. A bombogenesis occurs when a mid-latitude cyclone rapidly (or explosively) intensifies over a 24-hour period. Find out more: https://t.co/svMy2rP6aq pic.twitter.com/pjO6TvnAJo / Twitter"
To learn more about what warrants a bombogenesis, listen to today's episode of "This Day In Weather History."
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Onto the impact.
In the U.S., at least 1 million acres of farmland across nine major grain-producing states were flooded.
Iowa was highly impacted by the flooding. Iowa's governor, Kim Reynolds, issued a state of emergency on March 14. The flooding in the state was reported as "catastrophic." In the Missouri River Valley, at least 30 levees failed, which caused towns and highways to flood.
Colorado received heavy snow and hurricane-force winds. Some gusts reached 180 km/h. Denver received 150 to 250 mm of snow. Due to the extreme wind and snowy conditions, all flights in and out of Denver International Airport were cancelled. The snow left at least 1,000 people stranded on the highways, and the National Guard had to come to rescue them.
CR194 remains CLOSED as more than 60 cars are still stuck due to Wednesday's blizzard. @KDVR @channel2kwgn pic.twitter.com/fe6idNit0U
CR194 remains CLOSED as more than 60 cars are still stuck due to Wednesday’s blizzard. Christine Rapp on Twitter: "CR194 remains CLOSED as more than 60 cars are still stuck due to Wednesday's blizzard. @KDVR @channel2kwgn pic.twitter.com/fe6idNit0U / Twitter" Christine Rapp on Twitter: "CR194 remains CLOSED as more than 60 cars are still stuck due to Wednesday's blizzard. @KDVR @channel2kwgn pic.twitter.com/fe6idNit0U / Twitter" Christine Rapp on Twitter: "CR194 remains CLOSED as more than 60 cars are still stuck due to Wednesday's blizzard. @KDVR @channel2kwgn pic.twitter.com/fe6idNit0U / Twitter"
— Christine Rapp (@christinerappwx) Christine Rapp on Twitter: "CR194 remains CLOSED as more than 60 cars are still stuck due to Wednesday's blizzard. @KDVR @channel2kwgn pic.twitter.com/fe6idNit0U / Twitter"
In New Mexico, there were wind gusts of 160 km/h, powerful thunderstorms, and damaging tornadoes.
State Police on scene of a #trainderailment on SR 469 near Logan, NM involving 26 rail cars. No injuries reported. Wind was contributing factor in crash. pic.twitter.com/Qp6pzr0ee1
State Police on scene of a NMSP on Twitter: "State Police on scene of a #trainderailment on SR 469 near Logan, NM involving 26 rail cars. No injuries reported. Wind was contributing factor in crash. pic.twitter.com/Qp6pzr0ee1 / Twitter" on SR 469 near Logan, NM involving 26 rail cars. No injuries reported. Wind was contributing factor in crash. NMSP on Twitter: "State Police on scene of a #trainderailment on SR 469 near Logan, NM involving 26 rail cars. No injuries reported. Wind was contributing factor in crash. pic.twitter.com/Qp6pzr0ee1 / Twitter"
— NMSP (@NMStatePolice) NMSP on Twitter: "State Police on scene of a #trainderailment on SR 469 near Logan, NM involving 26 rail cars. No injuries reported. Wind was contributing factor in crash. pic.twitter.com/Qp6pzr0ee1 / Twitter"
In Canada, Ontario and Quebec experienced their warmest days in weeks. In Ontario, the Humber River flooded and 200 people had to be evacuated.
Atlantic Canada received above seasonal temperatures and heavy rain. Though Labrador received up to 30 cm of snow.
The storm then headed out to sea and dissipated on March 16.
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Thumbnail: Bellevue, Nebraska - Courtesy Bellevue Police Department