Diurnal Cycle of Winter Season Temperature Errors paper published in GRL

Our research utilizing a relational database of matched weather forecasts and observations has been published in the AGU journal Geophysics Research Letters. (link to article)
We evaluated the output from weather forecast models compared to observations at 210 airports across the United States during the November 2019 to March 2020 winter season. We focused on near-surface air temperature errors in the Global Forecast System (GFS) and High- Resolution Rapid Refresh (HRRR) weather models for different times of day and subsets of observed weather conditions. The GFS is 1°C too warm at night and 2°C too cold during the day in conditions with <= 50% and <= 25% cloud cover. The daily high and low temperatures have smaller errors in the HRRR model, which has different algorithms than the GFS model. Model refinement and development efforts would benefit from a focus on accurate representation of the diurnal cycle of temperatures as this basic characteristic of weather can reveal strengths and weaknesses in the model physics. Continue reading “Diurnal Cycle of Winter Season Temperature Errors paper published in GRL”

Yuter elected to UCAR Board of Trustees

Distinguished Professor Sandra Yuter has been elected to the University Corporation for Atmospheric Research (UCAR) Board of Trustees for a 3-year term starting in February 2021. UCAR manages the National Center for Atmospheric Research in Boulder, Colorado as well as community programs focused on earth observations and data services (UNIDATA and COSMIC), education and training (GLOBE, SciEd, COMET), research to operations (JCSDA), and scientific partnerships (CPAESS).

NASA IMPACTS Winter 2020 field phase begins

During January and February 2020, group members Matthew Miller, Sandra Yuter, Laura Tomkins, Ronak Patel, and Daniel Hueholt will spend time at NASA Wallops Flight Facility in Virginia supporting mission science and forecasting for the NASA Investigation of Microphysics and Precipitation for Atlantic Coast-Threatening Snowstorms (IMPACTS) field program. Matthew Miller will also go to Hunter Army Airfield in Georgia to work in mission science support for the NASA ER-2 aircraft. Image: Meteorology majors Daniel Hueholt and Ronak Patel standing in front of the P3 research aircraft at NASA Wallops Island Flight Facility. Both students did winter storm forecasting and P3 aircraft data collection for the NASA IMPACTS field program.

Rhodes M.S. Thesis Defense

Spencer Rhodes celebrates with cake on 30 October 2019 after his successful oral defense of his Master’s Thesis “Large-scale environments associated with southeast Atlantic marine stratocumulus cloud-eroding boundaries”.

July 2019 Conferences

Laura Tomkins and Spencer Rhodes in Savannah, Georgia for the AMS Mesoscale Conference.

Group members presented their research at two conferences in July.
Matthew Miller presented a poster on the influence of gravity waves on clouds and precipitation at the Gordon Research Conference on Climate and Radiation in Lewiston, ME.
At the 18th AMS Mesoscale Processes Conference, Spencer Rhodes and Laura Tomkins presented talks describing their respective M.S. thesis research on cloud-eroding boundaries in the southeast Atlantic. Sandra Yuter presented a talk on local environments for ice growth in storms.

Undergraduates present posters at 2019 AMS Annual Meeting

Undergraduate research assistants Daniel Hueholt, Lindsay Hochstatter and Ronak Patel presented posters on their research at the American Meteorological Society Annual Meeting in Phoenix, AZ on 6 Jan 2019. Research topics were: the motion of cloud-clearing boundaries in the southeast Atlantic, velocity waves in Colorado snowstorms, and the variability of the urban heat island in Raleigh, NC.