Recent Posts by Hulda Johannsdottir

Short-term Forecasts of Left-Moving Supercells from an Experimental Warn-on-Forecast System

Most research in storm-scale numerical weather prediction has been focused on right-moving supercells as they typically lend themselves to all forms of high-impact weather, including tornadoes. As the dynamics behind splitting updrafts and storm motion have become better understood, differentiating between atmospheric conditions that encourage right- and left-moving supercells has become the subject of increasing…
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Looking to the skies

Looking to the skies -Gail Hartfield, NWA President, August 2017 By the time you read this, our nation will have experienced a once-in-a-lifetime total solar eclipse. The buzz surrounding this event has been astounding. It began well over a year ago when hotels along the path of totality began selling out, and plans for comprehensive…
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Fire-effective Low-level Thermal Ridges on the Southern Great Plains

Low-level thermal ridges (LLTRs) have been identified as common meteorological features associated with wildfires in grass-dominated fuelscapes on the southern Great Plains. Analogous to the well-documented fire-effectiveness of West Coast thermal troughs, LLTRs on the Plains have a dramatic influence on wildland fire. Identification of these features in proximity to midlevel wind maxima has proven…
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