MMET Data Repository

Full data sets for each case described below can be accessed from the MMET Data Repository. A description of the data sets available can be found under the Data Description tab. MMET cases include both single-day and multi-day events with baseline results of the operational models available for the 00 and 12 UTC initializations for each day. For the RAP and HRRR, hourly datasets out to the model forecast length are available, while the NAM has 3-hourly output out to 48 hours available.

Datasets associated with MMET cases that ocurred prior to February 2012 will remain available on the MMET data server; however, they will no longer be updated with new versions of the WRF and NEMS-NMMB code. New cases will be added as resources permit going forward.

In addition to the cases established in MMET, a supplementary set of cases and known persistent issues in NCEP's modeling suite is summarized here. This list is provided to assist the research community in identifying areas that would be beneficial to address when developing new science innovations that could improve NCEP's modeling suite.

For more information regarding the synoptic situation for each case, please visit the Meteorological Case Study Selection Kit website, maintained by the Mesoscale and Microscale Meteorology Division at NCAR.

MMET operational baselines: Cases run on operational model data

20160623-20160624:Flooding in W. Virginia and surrounding states [Multi-day case]

20160509-20160510:Severe weather over Central Plains [Multi-day case]

20160122-20160124:Snowstorm over Mid-Atlantic [Multi-day case]

20150826-20150827:Remnants from typhoon Atsani affecting Alaska [Multi-day case]

20150322 12 UTC:Intense band of heavy snowfall over South Dakota to Minnesota [Single case]

20150125-20150126:Strong Nor'Easter bringing heavy snowfall. [Multi-day case]

20150105-20150106:Intense snowfall over midwest. [Multi-day case]

20140105-20140107:Extreme cold event. [Multi-day case]

20130910-20130914:Record floods in Colorado. [Multi-day case]

20130729 12 UTC:Flooding over the central plains. [Single case]

20120629-20120630:Very strong, high-impact derecho. [Multi-day case]

MMET HWRF baselines: Cases run on operational model data using public release codes

2016092818-2016092900:Hurricane Matthew Track and Intensity forecasts. [Multi-day case]

MMET physics suite baselines: Cases run by DTC using functionally similar operational environments

MMET cases are either single event cases with datsets for one particular initialization time out to 84 hours, or multi-day cases with datasets available at 00 and 12 UTC daily out to 48 hours.

20160122-20160124:Snowstorm over Mid-Atlantic [Multi-day case]

20150322 12 UTC:Intense band of heavy snowfall over South Dakota to Minnesota [Single case]

20150125-20150126:Strong Nor'Easter bringing heavy snowfall. [Multi-day case]

20150105-20150106:Intense snowfall over midwest. [Multi-day case]

20140912 06 UTC:Hurricane event. [Single case]

20140915 18 UTC:Hurricane event. [Single case]

20140105-20140107:Extreme cold event. [Multi-day case]

20130910-20130914:Record floods in Colorado. [Multi-day case]

20130729 12 UTC:Flooding over the central plains. [Single case]

20120629-20120630:Very strong, high-impact derecho. [Multi-day case]

20120203-20120205:Snowstorm over Colorado, Nebraska, etc.; NAM predicted too little precipitation in the warm sector and too much snow north of the front (persistent bias). [Multi-day case; Nest over central US]

20111128 00 UTC:Cutoff low over SW US; NAM had difficulties throughout the winter with breaking down cutoff lows and progressing them eastward. [Single case; No nest]

20110404 00 UTC:Record breaking severe report day. [Single case; Nest over south/east US]

20110518-20110526:Extended period of severe weather outbreak covering much of the Midwest and into the eastern states later in the period. [Multi-day case; Nest over midwest/southern US]

20110213-20110216:Winter storm over Northern California associated with an atmospheric river event. [Multi-day case; Nest over California]

20100428-20100504:Historic Tennessee flooding associated with an atmospheric river event. [Multi-day case; Nest over central plains]

20091217 12 UTC:"Snowpocalypse 2009"; NAM produced high QPF over mid-Atlantic, lack of cessation of precipitation associated with decreasing cloud top over eastern North Carolina. [Single case; Nest over southeast US]

20091007 00 and 12 UTC:High-Resolution Window (HIRESW) runs underperformed compared to coarser NAM model. [Two single cases; Nest over south-central US]

20090311 00 UTC:High dew point predictions by NAM over the upper-Midwest and in areas of snow. [Single case; No nest]

20090228 00 and 12 UTC:Mid-Atlantic snow storm where North American Mesoscale (NAM) model produced high QPF shifted too far north. [Two single cases; Nest over southeast US]