Retired senior lecturer in the Department of Meteorology at Penn State, where he was lead faculty for PSU's online certificate in forecasting.
By: Lee Grenci, 9:08 PM GMT on January 27, 2016
On occasion, a few Wunderground readers have e-mailed me to say that conveying scientific truth to the general public is not a priority in the grand scheme of weather forecasting. For me, however, getting the science right is a matter of principle. When scientific truth no longer counts in weather forecasting, I’ll know that it’s time for me to “hang up the spikes” and to finally get off my soapbox once and for all.
I never pretended to know all...
Updated: 10:01 PM GMT on January 28, 2016
By: Lee Grenci, 5:33 PM GMT on January 18, 2016
I have to admit that I'm no expert on meteotsunamis (see Dr. Atkinson's blog), but the link provided left me confused. And I quote: "A meteotsunami, according to the NWS is caused by "air pressure disturbances often associated with fast moving weather systems." I honestly don't know what this even means, but it's my goal to give you a better idea of what really happened.
If you read the Wikipedia "account," it states, "...caused by intense low pressure ...
Updated: 1:03 PM GMT on January 20, 2016
By: Lee Grenci, 6:51 PM GMT on January 14, 2016
At the time I'm writing this, Tropical Depression Pali is rapidly weakening as it grinds its tropical gears within 2.5 degrees latitude of the equator. Two days ago, I was thinking that Pali had at least a fighting chance to retain its rotational integrity and cross the equator, despite the lack of a meaningful Coriolis force at these very low latitudes. In other words, I was banking on inertia and angular momentum to offset the dwindling contribution of the Corio...
Updated: 8:38 PM GMT on January 14, 2016
By: Lee Grenci, 1:42 PM GMT on January 12, 2016
Folks...I might be wrong here (it won't be the first time), but I believe there's a chance that Hurricane Pali (in the Central Pacific) could cross the equator (yes, it is theoretically possible!!). The operative word, of course, is "chance." There is lots of uncertainty when a rare tropical cyclone like Pali flirts with the equator because, to my knowledge, it has never happened before.
Why do I believe there is a chance? Well, there are extremely ano...
Updated: 5:33 PM GMT on January 14, 2016
By: Lee Grenci, 7:36 PM GMT on December 23, 2015
This morning I've heard the same old tired and incorrect "clash of air masses" for the underpinning reason for severe thunderstorms (and risk of tornadoes) over the Middle West today. It's almost as if there's a button that some television meteorologists push to invoke this default explanation whenever there's an outbreak of severe weather (like today's outbreak over the Middle West).
The 15 UTC surface analysis on December 23, 2015. Courtesy of WPC...
Updated: 7:51 PM GMT on December 23, 2015