Readme_HMR_51_Maps.txt

Date:
July 1, 2011

The Contact person for this data set is:

John F. England Jr., Ph.D., P.E., P.H., D.WRE
Flood Hydrology Technical Specialist
Bureau of Reclamation
Flood Hydrology & Emergency Management Group, 86-68250
Bldg. 67, Denver Federal Center
Denver, CO USA 80225-0007
Phone: 303-445-2541  Fax: 303-445-6351
E-mail: jengland at usbr dot gov
ftp://ftp.usbr.gov/jengland/
http://www.usbr.gov/pmts/flood/

Please contact the above person with questions about this data set.
Do not contact NWS-HDSC.

Data Set Directory Contents:

These directories consist of digitized (GIS) versions of Probable Maximum Precipitation (PMP) estimates as given in Figures 18 through 47 from HMR 51 (Schreiner and Riedel, 1978).

Directory (zip file) contents are as follows.

/HMR_51_Plates/ Contains georeferenced images (.tif) of each Figure (30 images).

/HMR_51_Shapefiles/ contains polyline shapefiles (ESRI shapefile format) of PMP isolines for each Figure (30 images), and a 'stipple' region.

Metadata for each shapefile contains further details on development.

/HMR_51_Grids/ contains gridded versions (ESRI grids) of each shapefile (30 PMP grids; one stipple region).


Data Set Comments:

Users of this data set are responsible for assessing this information and its accuracy for their intended purpose or application.

There is no warranty, expressed or implied, with this data set.

Linear interpolation methods were used to develop PMP grids from the PMP isolines (in the shapefiles).

The grids provide PMP values beyond the edges of the isolines and are not clipped in any way.
These gridded PMP values are NOT recommended for use outside PMP isolines.
It is recommended that users follow guidance in HMR 51 (page 43) for PMP estimates in the Gulf Coast states.


Source Data Reference:

Schreiner, L.C. and Riedel, J.T. (1978) Probable Maximum Precipitation Estimates, United States East of the 105th Meridian. Hydrometeorological Report No. 51, National Weather Service, National Oceanic and Atmospheric Administration, U.S. Department of Commerce, Silver Spring, MD, 87 p.


Funding Source:

This work was completed by the Bureau of Reclamation, Flood Hydrology and Emergency Management Group, Denver, Colorado, under contract with the Nuclear Regulatory Commission (NRC). NRC Agreement RES-08-127, Job Code N6570.