United States of America
We have an unusual upper air setup currently over eastern North America with a cutoff low anchored over the Appalachian Mountains with a circling ridge transporting intense Plains heat into northern New England. Quebec and the Maritimes. Note the ridge circling the cutoff low over Eastern North America. So, while it’s mid to upper 90s […]
It’s been a cool June thus far for the Pacific Northwest and Northeast but for the Central states, summer is in full swing. June 2m temp anomaly across the US so far. While unseasonable cold and warmth don’t mix well, there has been dramatic weather and contrasts as a result. From 100-degree heat to record […]
Following one of the coldest opening 10 days of May in history, the Northeast US is about to skip from March to May within 72 hours. May temp anomaly so far. 90s could may it to Richmond, VA and 80s to Philadelphia and even Trenton, NJ by Friday. New York could see 80s Saturday. Then […]
While it couldn’t make an appearance during winter, it’s taken till nearly mid May for the tropospheric polar vortex to come crashing south. A final stratospheric warming event combined with stratosphere to troposphere coupling and significant height rises into Alaska led to one of the strongest May Arctic Outbreak’s on record. One of 2 pieces […]
With the MJO lingering in the west/central Pacific warm phases, this forced a strong and sustained polar vortex, which resulted in the 6th warmest winter on record for the US. This enhanced the mid latitude subtropical ridge and forced the lowering of heights across the high latitudes, hence the strong polar vortex which bottled polar […]
Based on all the current parameters and model projection, the 2020 Atlantic Hurricane Season is likely to be busy one. However, let’s keep in mind that although 9 out of 10 factors can align perfectly, it just takes one factor to significantly suppress development or intensification in a seemingly perfect environment, e.g Saharan dust, wind […]
Old man winter decided to not show for the winter of 2019-20 not just over the USA but the majority of the hemisphere. Now that we’re well into spring when heat, storms and even hurricanes become the focus, winter decided to arrive, albeit 2 months late. With a shift in the big tropical drivers, the […]
Bob Henson · June 6, 2019, 1:31 PM EDT Propelled by a two-week siege of widespread severe weather and heavy rain in late May, the contiguous U.S. has once again broken its record for the wettest year-long span in data going back to 1895. According to the monthly U.S. climate summary released Thursday from the […]
May will be remembered for it’s flooding rainfall and severe weather. Temperature extremes of widespread cold from Southwest to Great Lakes and all-time record May heat in the Southeast was also noteworthy. One cannot help but think a cooler, wetter summer is on the horizon for a large swathe of the US thanks to the […]
Welcome to my 9th annual US summer forecast. As always, when compiling this forecast for the upcoming June-August period there are multiple factors which have been taken into consideration which could influence the summer pattern. These include global and regional sea surface temperature anomalies, El Nino, MJO and rainfall distribution over the last 6 months. […]
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