Cold Front Moving Through the Northeast U.S. Monday; Atmospheric River to Impact the Pacific Northwest Midweek

A cold front will cross the Great Lakes and Northeast U.S. through Monday with gusty winds and areas of rain showers. A strong atmospheric river is expected to move into the Pacific Northwest by midweek bringing a threat for moderate to heavy rainfall, gusty winds, and mountain snows for parts of Washington, Oregon, northern California, and the Sierra Nevada. Read More >

The Automated Surface Observing System (ASOS) that operates at the Abraham Lincoln Capital Airport in Springfield (station KSPI) has been experiencing technical difficulties for a few weeks. Technicians have been unsuccessful thus far in repairing the system, and continue to work with our regional headquarters and the supply depot on potential fixes.

The following impacts will continue:

During the hours that the control tower is in operation, air traffic controllers are supplying manual observations into the system. However, this data is not available overnight (10 pm to 6 am) when the tower is closed.
Because low temperatures typically occur during the early morning, the low temperature each day generally is not available. High temperatures can often be obtained based on the control tower observations.
Rainfall is being provided by the nearby observer that normally takes snowfall observations.
On our climate summaries for Springfield, average wind speed and peak wind gusts will generally be not available or incorrect, because the entire sample of the day is not available. Similarly, when high or low temperature is missing, heating and cooling degree days cannot be calculated.
Areas on our forecast pages that use Springfield as the home site will frequently have the observation missing.
On the hourly weather roundup for NOAA Weather Radio station WXJ-75, the Decatur observation will be used when Springfield is not available.

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Cold Front Moving Through the Northeast U.S. Monday; Atmospheric River to Impact the Pacific Northwest Midweek

Information on Observation Outage at the Springfield Airport