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Specifically this is the record number of consecutive days, in the month of November, with the high temperature 32 degrees or colder. The data below comes from the National Weather Service.
Waterloo: 11 days (1985)
The chart below shows the temperatures through the 18th. Today (19th) the high was 25 degrees. We are just 2 days away and that is Thursday and Friday. The forecast high for both days is in the 20s. The forecast high for Saturday is low 40s.
Dubuque: 10 days (1985)…the record will be tied Friday.
Cedar Rapids: 7 days (1977 & 1937)…the record was broken Wednesday and a new record will be set every day through Friday.
Iowa City: Date not available
Posted under Temperatures
It was another cold start. Here are the low temperatures Tuesday morning.
We broke records by a couple of degrees.
The average low temperature of 19.4 degrees, across the nation, was the coldest November morning since November 30, 1976
It is cold across the nation. The only place “warm” is south Florida. Here are the temperatures as of 7 PM from the Oklahoma Mesonet.
The jet stream is in a large “U” shape or trough and this is allowing the cold air across the nation.
We are dealing with the coldest air of the season so far and it is cold enough to break record cold highs and record lows for November. The first graphic is from today (Nov 17). A record cold high was set in Waterloo. The NWS does not have any record data for Cedar Rapids or Iowa City.
Now tonight temperatures are expected to drop to near zero by morning with wind chills of 10 to 20 below zero. The forecast lows are all new record lows for Tuesday (Nov 18)
Starting out is a deep “temperature hole” it will be hard to get out. High temperatures again will be in the teens with a better chance of both Waterloo and Dubuque breaking the record cold highs for Tuesday (Nov 18)
Every state in the lower 48 will have a low temperature below freezing Tuesday morning.
Posted under Records
UPDATED FRIDAY AFTERNOON
Tonight: Increasing clouds and cold. Low: 10-12. Wind: W 5-10
Saturday: Cloudy with a 100% chance of light snow beginning around noon. High: 27-31. Wind: SW 5-10 mph.
Saturday Night: Cloudy with a 100% chance of light snow. Snow ends by sunrise Sunday. Snow totals: 1-3” with isolated 4”. Low: 16-21. Wind: W 5-10 mph
Sunday: Mostly cloudy. High: mid 20s.
Monday: Mostly cloudy and windy (NW 15-25 mph). High: near 20.
Tuesday: Mostly cloudy and windy (NW 15-25 mph). High: near 20.
Wednesday: Partly cloudy. High: upper 20s.
Thursday: Mostly cloudy. High: near 30.
Friday: Mostly cloudy. High: near 30.
The sky will remain clear this evening with clouds increasing after midnight.
A WINTER WEATHER ADVISORY is in effect for Saturday afternoon and Saturday night for just about all of eastern Iowa.
This is all part of a much larger area under a Winter Weather Advisory.
Snow moves into eastern Iowa around midday Saturday. Here is the RPM model showing snow moving east at 1 PM Saturday.
Light snow continues through Saturday night before ending around sunrise Sunday morning.
Snow totals across eastern Iowa range from 1-3” with isolated 4” amounts possible.
Once the snow moves through the next weather concern is the coldest air of the season Monday and Tuesday. On top of that it is going to be windy during this time as well. Tuesday morning wind chills could be in the teens below zero. The map below shows the cold air moving south from Canada.
Posted under Forecast Discussion
Sunshine returns Friday, but it doesn’t help warm the temperatures up. Afternoon highs only reach the 20s again.
Clouds increase late Friday night.
Light snow develops around midday Saturday, and continues through the afternoon and night before ending around sunrise Sunday.
Snow accumulations area wide will be 1-2″ with an isolated 3″ reports possible.
This would be our first accumulating snow for all of eastern Iowa. The wind will be light with this snow, so blowing snow will not be a concern.
Posted under Forecast Discussion