IHOP Domain Retrospective Forecast Runs (MM5 and WRF)
Updated: 12 Apr 2004 by Brent Shaw (Brent.Shaw@noaa.gov)
NOAA/Forecast Systems Lab, Forecast Research Division, Local Analysis and Prediction Branch
We are embarking on a complete rerun of all 6-hourly (i.e., 0000, 0600, 1200, and 1800 UTC initialization times) MM5 and WRF forecasts on the 12-km domain. There will be some special off-cycle runs made in support of other research being conducted at FSL, including 9 June. These reruns will incorporate numerous improvements to the LAPS diabatic initialization, including:
Bug fix to balance procedure. During the experiment and the first set of a reruns, a bug was present that introduced a warm bias throughout the column. This had the effect of destabilizing the atmosphere (making convection more easily triggered) and artificially increasing the moisture content in the domain (temperature increased while RH held constant = higher total integrated precipitable water).
Moisture field is made consistent with adjusted temperatures in balance package.
Saturation condition applied in lapsprep now a function of ice saturation and/or liquid saturation, depending on temperature.
Mixing ratio of ice and cloud water not allowed to exceed the Schultz microphysics autoconversion rates for snow and rain, respectively.
In addition to the LAPS diabatic initialization procedure improvements, a new version of the Schultz microphysics has been implemented within MM5. All of the reruns will have these improvements. The links below will display a text file containing the list of runs to be performed. As these runs are completed, these files will be updated by filling in the appropriate columns.
LATEST STATUS: Awaiting complete rerun of 12km LAPS analysis for the period. Click here for latest status on the LAPS analysis rerun saga.
TARGET COMPLETION DATE: 1 May 2004
Click here to see the status of the 12km MM5 reruns.
Click here to see the status of the 12km WRF reruns.
If there is a case you are interested in obtaining, see the page about data formats and locations by clicking here.