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About the Medium Range Forecast

Issuance Times


Product Time
Graphics 1400 EST/EDT
Discussion 1430 EST/EDT

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About These Products


The medium range forecast products include: 1) surface pressure patterns, circulation centers, and fronts for days 3, 4, and 5 into the future, 2) daily maximum and minimum temperatures and anomalies for days 3-7, 3) daily precipitation probabilities for days 3-7, and 4) total 5-day precipitation for days 1 through 5. These products are issued once per day along with a written discussion. Separate forecasts, similar to the 5-day mean products, are prepared for Hawaii. 

Two meteorologists work this once a day shift. One produces pressure systems/fronts, 5-day precipitation, and 3-5 day POP progs while the other produces the 3-7 day temperature and 6-7 day POP progs. They routinely use output from the MRF, ECMWF, and UKMET medium range models and also consider the Canadian, the Navy's NAVGEM model, the MRFX, a semi-operationally run experimental version of the MRF, and ensembles. 

During hurricane season, at 1200 noon EDT time on a daily basis since June 1, 1997, the medium range pressure forecaster participates in a conference call with the NHC via the Hurricane Hotline to discuss current and potential tropical activity in the Atlantic and Eastern Pacific oceans and how the medium range models are handling the situation. 

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Last Updated
February 9, 2001