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V1.1
Title:
Experimental Probability of Exceedance Forecast for Precipitation and Snowfall
Category:
Experimental
Status:
Proposed to Discontinue
Service Area:
Public Weather
Entered:
2012-02-17
Type:
Product
Data (Obs/Forecast/verification)
Dissemination System
Model
Model Data
Web Page
Data Mining Tool
Outreach / Education
Display App
Service
Other
Scope:
Description
This service enhancement adds the probability of exceedance for specific rainfall amount thresholds (0.10, 0.25, 0.50 and 1.00 inch) and snowfall amount thresholds (0.1, 1, 3, 6 and 12 inches) to the list of selectable elements for display by the user. B. Purpose/Intended Use: Enhancement of the Hourly Weather Graph format to provide access to forecast probabilities for rainfall and snowfall exceeding specific thresholds. The NWS has historically provided the probability of precipitation (PoP) for 12 hour time periods which is the chance that the occurrence of rainfall will equal or exceed 0.01 inch or more at the selected location. This service enhancement provides the probability that rainfall or snowfall will exceed additional (higher) threshold amounts. Potential users of this enhancement would be in construction, agriculture, water management, outdoor planning, media, academia and the general public. For example, workers pouring concrete often need to know what is the chance of rainfall exceeding 0.10 inches, since rainfall above 0.10 would hamper or damage their work. Therefore, they would be able to display the probability of rainfall above the threshold of 0.10.
Tags
Product information and survey access
Point of Contact
John S. Eise john.eise@noaa.gov
Document (e.g. PDD)
PDD_Experimental_Probability_of_Exceedance-Extension.pdf
Example file:
Product URL(s):
http://forecast.weather.gov/MapClick.php?site=eax&zmx=1&zmy=1&map.x=127&map.y=148&FcstType=graphical
Comments via:
http://www.weather.gov/survey/nws-survey.php?code=pefps
Comment Start Date:
2013-09-01 Comment End Date: 2014-08-31
Experimental
Notification:
http://www.nws.noaa.gov/os/notification/pns13experimental_probabability_of_exceedance.htm
Decision information
Deciding Official:
John Ogren
Decision:
Approved to extend comment period
Decision Date:
2013-08-15
Decision Document:
Operational
Notification:
ID:212
Last edit date to this meta-data: 2018-01-08
