Precipitation Monitoring

Precipitation and the subsequent standing water it produces are the driving force behind mosquito control operations in Warren County . Even a small amount of rain (2 or 3 tenths of an inch) can create flood water in stormwater runoff facilities such as detention ponds. Monitoring precipitation is a key aspect of planning control operations. In addition to snow melt in the spring and rainfall events that involve the entire county,sometimes storms impact only a portion of the county, particularly summer thunderstorms. Rainfall is monitored two ways.

Rain Gauges:

  All employees living in the county have a rain gauge at their residence and report any rainfall upon the start of the work day.

Rain gauges are also located throughout the county at the location of routine surveillance stations where resident cooperators record rainfall amounts on a daily basis. A series of weather stations around the state are coordinated by the Office of the New Jersey State Climatologist at Rutgers Univers

ity and information from sites within Warren County will hopefully be available on a real time basis and be useful monitoring rainfall as well.  


Internet access to various weather websites has provided additional information about rainfall events throughout the County. Satellite imagery showing historic rainfall data has proven helpful when tracking weather systems that have passed by. Doppler radar estimated rainfall amounts for a specific time period can be found on some weather websites. The Doppler estimates provide a good guide for focusing on areas that have received the most rainfall.

Community Collaborative Rain, Hail & Snow Monitoring (CoCoRaHS):  

is a “grassroots volunteer effort to measure precipitation in the backyards of the United States” initially started by Colorado State University.  Commissioners and staff members voluntarily participate in this effort.  The CoCoRaHS website provides real time precipitation data used by scientists throughout the United States, and used by the Commission for guiding surveillance and control efforts within Warren County.  Click the following link to view the Daily Precipitation Map for New Jersey.

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