Subtropical Storm May Still Develop Off Southeast Coast This Week

By: Bob Henson, 15:23 GMT le 04 mai 2015

Models are still suggesting that a moisture-laden disturbance off the southeast U.S. coast could develop into a subtropical cyclone later this week, although there is large uncertainty about how strong it might be and where it might go. A band of rich moisture now extends from the northwest Caribbean across Cuba into the southeast Bahama Islands. This air mass will shift north over the next several days, where it will intercept a decaying frontal boundary. Heavy rai...

Updated: 20:52 GMT le 04 mai 2015

What Do Skyscrapers, Thundersnow, and Jim Cantore Have in Common?

By: Bob Henson, 18:40 GMT le 01 mai 2015

Thundersnow is a rare enough event to get even veteran meteorologists like The Weather Channel’s Jim Cantore excited, as one can tell by the popular clips of Cantore reacting to several thundersnow events this past winter in Massachusetts. It’s estimated that less than 1% of all U.S. lightning flashes in the winter are associated with snow. Thundersnow’s rarity, and the fact that it’s often accompanied by poor visibility, has made it tough for researchers to...

Lightning Winter Weather

Updated: 20:43 GMT le 01 mai 2015

An Atlantic Named Storm Coming for the First Week of May?

By: Jeff Masters, 14:07 GMT le 01 mai 2015

The first week of May is usually too early for the Atlantic to see its first named storm, but that is a possibility this year, according to the Friday morning runs of the GFS and European models. These models predict that an extratropical storm will form along an old cold frontal boundary over the Bahama Islands just east of the coast of Florida on Tuesday, then drift slowly northwards towards North Carolina during the week. Ocean temperatures are near 26°C (79°F)...


California Rainy Season Ending; January-April rain in San Francisco Lowest on Record

By: Jeff Masters, 14:44 GMT le 30 avril 2015

The fourth consecutive severely dry California rainy season is drawing to a close. Rain-bearing low pressure systems typically stop bringing heavy rains to the state by mid-April, as the jet stream shifts to the north in its usual springtime migration. With almost no rain in the forecast for the next seven days, and the 16-day GFS model forecast showing mostly light rains affecting the northern portion of the state 8 - 16 days from now, California has likely seen ov...


Air Pollution and Dust Credited With Weakening Hurricanes Irene and Katrina

By: Jeff Masters, 13:30 GMT le 28 avril 2015

As Hurricane Irene churned northwards out of the Bahamas towards the Northeast U.S. on August 25, 2011, residents there scrambled to prepare for the arrival of what could well be the most destructive hurricane ever to hit the United States. Irene had just devastated the northern Bahamas as a Category 3 storm with 120 mph winds, and the National Hurricane Center forecast called for the hurricane remain at Category 3 strength as it plowed over the Outer Banks of North...

Updated: 06:14 GMT le 29 avril 2015

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Jeff co-founded the Weather Underground in 1995 while working on his Ph.D. He flew with the NOAA Hurricane Hunters from 1986-1990.

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