Tropical Atlantic Quiet; Pacific Getting Active

By: Jeff Masters, 03:21 PM GMT on Lipanj 30, 2015

The tropics are quiet in the Atlantic Ocean, where no tropical storm activity is likely for at least the next week. A moderate-strength El Niño event is underway in the Eastern Pacific, and the atmospheric circulation associated with the strong warming of the waters off the coast of Peru is creating strong upper-level winds over the Caribbean. These powerful winds were creating a very high 60 - 70 knots of wind shear over the Caribbean and Southern Gulf of Mexico o...


Unprecedented June Heat in Northwest U.S. Caused by Extreme Jet Stream Pattern

By: Jeff Masters, 02:30 PM GMT on Lipanj 29, 2015

A searing heat wave unprecedented for June scorched the Northwest U.S. and Western Canada on Saturday and Sunday. Temperatures soared to their highest June levels in recorded history for portions of Washington, Idaho, Montana, and British Columbia; both Idaho and Washington set all-time high temperature records for the month of June on Sunday. According to wunderground's weather historian, Christopher C. Burt, the 113°F measured in Walla Walla, Washington beat that...

Heat Extreme Weather

Updated: 07:55 PM GMT on Lipanj 29, 2015

PECAN: Closest Look Yet at Nighttime Storms That Pummel Midwest

By: Bob Henson, 08:17 PM GMT on Lipanj 26, 2015

In most parts of the country, summer thunderstorms are most common in the afternoon or evening. Things are a bit different from the eastern Great Plains into the western Great Lakes. Across this core swath of the Midwest, lightning is most likely to zigzag across the summer sky during the wee hours of the morning. Along with disrupting countless nights of sleep, these middle-of-the-night thunderstorms are renowned for torrential rain, large hail, and destructive win...

Severe Weather

Big Contrasts this Weekend: Roasting Out West, Soaking Back East

By: Bob Henson, 03:15 PM GMT on Lipanj 25, 2015

The atmosphere over North America will slide back into a familiar pattern this weekend, as a powerful upper ridge and record heat take hold of the Pacific Northwest and western Canada while an unusually strong upper low for late June brings wet, cool conditions from the Ohio Valley through the mid-Atlantic into New England. It’s yet another variation on the warm-west/cool-east pattern that predominated through much of 2014 and early 2015.

Sizzling temp...

Heat Extreme Extreme Weather Fire

Updated: 04:51 PM GMT on Lipanj 25, 2015

Pakistan's Deadliest Heat Wave on Record Kills at Least 800

By: Jeff Masters, 05:37 PM GMT on Lipanj 24, 2015

The death toll from a brutal heat wave in Pakistan rose to 830 on Wednesday, making it Pakistan's deadliest heat wave in recorded history. Most of these deaths--at least 770--occurred in Pakistan's largest city, Karachi. According to statistics from EM-DAT, the International Disaster Database, Pakistan's previous deadliest heat wave was in 1991, when 523 people died.

Death Tolls from the 5 Deadliest Heat Waves in Pakistan's History
1) 2015: 830+

Heat Climate Change

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Dr. Masters co-founded wunderground in 1995. He flew with the NOAA Hurricane Hunters from 1986-1990. Co-blogging with him: Bob Henson, @bhensonweather

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