May and June are typically peak months for tornadoes in North America. We asked Penn State meteorology professors Paul Markowski and Yvette Richardson to explain why tornadoes form, how to stay safe if you're near one and ...
Earth Sciences
May 19, 2017
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Strong updrafts—currents of rising air—in severe thunderstorms are a prerequisite for hail formation. The width of these updrafts may be an indicator of an increased hail threat, according to Penn State meteorologists.
Earth Sciences
Feb 7, 2017
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Although the Atlantic hurricane season officially began on June 1st, we're now entering the "season within the season" - a roughly eight-week period that is often the most active and dangerous time for tropical cyclone activity.
Earth Sciences
Aug 24, 2016
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In its updated 2016 Atlantic Hurricane Season Outlook, NOAA calls for a higher likelihood of a near-normal or above-normal season, and decreases the chance of a below-normal season to only 15 percent, from the initial outlook ...
Earth Sciences
Aug 12, 2016
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NASA-NOAA's Suomi NPP satellite passed over Tropical Storm Conson early on Aug. 10 and visible imagery showed the wind shear that was affecting the storm earlier has waned as the system appeared more rounded.
Earth Sciences
Aug 10, 2016
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Tropical Cyclone Yalo formed yesterday and is expected to come to an end today, Feb. 26. NASA's Terra satellite captured an image of the young storm that showed strong wind shear was already tearing the storm apart.
Earth Sciences
Feb 26, 2016
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Tropical Cyclone Annabelle ran into adverse atmospheric and oceanic conditions and was fading quickly on Nov. 24. But the day before, NASA's RapidScat instrument saw some dying bursts of wind from the weakening Southern Indian ...
Earth Sciences
Nov 24, 2015
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On Aug. 28, 2005, the National Hurricane Center issued a public notice warning people in New Orleans of "devastating damage expected...power outages will last for weeks...persons...pets...and livestock left exposed to the ...
Earth Sciences
Aug 21, 2015
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The GPM satellite showed the effects of wind shear and waning rainfall rates in Extra-tropical Cyclone Joalane as it was moving in a southeasterly direction through the Southern Indian Ocean.
Earth Sciences
Apr 16, 2015
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The final warning was issued on Tropical cyclone Fundi on Sunday, Feb 8 as NASA-JAXA's GPM satellite captured its waning rainfall.
Earth Sciences
Feb 9, 2015
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