Heavy Snow and Disruptive Ice in the Upper Midwest; Severe Thunderstorms in the Southern Plains

A late season winter storm will produce a combination of heavy snow and disruptive ice starting this evening in the Northern Plains and moving into the Upper Midwest and Great Lakes by tonight continuing through Thursday. Severe thunderstorms will likely produce severe wind gusts, large hail, a few tornadoes, and heavy rainfall across the southern and central Plains today. Read More >

Model Data

Penn State Meteo Department's E-Map Wall (v 2.0)

NOAA National Center for Environmental Prediction (NCEP)

Operational Guidance

NCEP's Full Operational Suite of Model Data (NAM, GFS, etc.)

Ensemble Forecast Links:
Rapid Refresh / CAMs	Short Range Ensembles (SREF)	Medium-Long Range Ensembles
NSSL CAMs (Convective Allowing Models)		Situational Awareness Tables
Hi-Res Ensemble Forecast (HREF)	SPC SREF Maps	CDC/ESRL Map Room - GFS Ensemble Graphics. (plots to 360hrs)
NCEP Time-Lagged N. America Rapid Refresh Ensemble System (NARRE-TL)	SPC NCEP SREF Plume Plots	GEFS Plume Diagrams

Bob Hart's Banded Precipitation Diagnostics Page
Great wintertime reference for Conditional Symmetric Instability (CSI) and forecasting the bands of snow often associated with CSI.