According to the U.S. National Oceanic and Atmospheric Administration, certain storms undergo bombogenesis, which happens when a storm’s central pressure drops at least 24 millibars in 24 hours. These storms are sometimes called bomb cyclones. Storm intensity is measured by central pressure, so the lower the pressure, the stronger the storm.

A strong storm system known as a bomb cyclone is lining up to slam the U.S. on Christmas Eve, possibly complicating holiday travel and bringing gusty winds that could cause power outages.

A flood emergency is underway in western Washington as a second surge of rain is causing rivers across the region to rise. by Jackie Kent,KOMONewsReporter SEATTLE — Some areas that got hammered by November's bomb cyclone were at risk for damaging hail ...

FEMA denied Washington's application for $34 million in federal funds after November's bomb cyclone. The bomb cyclone knocked out power for more than 500,000 people, destroyed homes and infrastructure, and left two people dead. FEMA gave no reason for ...

The federal government has denied Washington's application for disaster relief after November's bomb cyclone that caused $34 million in damage, Gov. Bob Ferguson said Monday. The Federal Emergency Management Agency did not offer an explanation in its ...

The Federal Emergency Management Agency has denied Washington state’s request for emergency relief funds to help repair an estimated $34 million in damage from a deadly bomb cyclone storm system in November, according to Gov. Bob Ferguson. Ferguson said ...

HELENA, Mont. (AP) — Flood, snow, avalanche and fire alerts popped up Monday from Idaho to Colorado, as parts of the U.S. interior that were paralyzed by blizzards and floods last month braced for round two of an unusual weather phenomenon. Welcome to ...

A powerful winter storm driven by a rapidly intensifying cyclone is sweeping east from the Plains, bringing heavy snow, ice and rain to much of the country