Past Features

This page lists out the IEM Daily Features for a month at a time. Features have been posted on most days since February 2002. List all feature titles.

Features for Dec 2022

Thu Dec 01, 2022
Dry Dew Point Hours
01 Dec 2022 05:30 AM
Since the dew point temperature generally needs at or below the air temperature, the very chilly air on Wednesday was dry as well. Probably thanks to the ongoing drought situation, it feels like we have seen more than our fair share of dry air so far this season. The featured chart attempts to quantify that feeling by showing the accumulated number of hours at or below a given dew point temperature for Des Moines between the 1 July and 30 November period. Sure enough, our suspicion was correct with most of the values shown above a simple climatological average. It is interesting to note that for extremely dry dew point temperatures (below 10F), this season has seen a below average accumulation. The reason for this is likely more a function of lack of snow cover, which promotes lower temperatures generally unreachable with somewhat warm ground temperatures that are snow free.
Voting: Good - 9 Bad - 1

Generate This Chart on Website
Fri Dec 02, 2022
Partitioning of Highs
02 Dec 2022 05:30 AM
High temperatures on Friday are expected to be in the 50s before another strong cold front drops us back below freezing for Saturday. We seem to have had plenty of days recently with highs in the 50s and the featured chart seems to point out this anomaly. The chart shows the number of days per year within the given high temperature bin for Des Moines for the year to date period. The simple long term average is shown along with the totals for this year and last. It is interesting to see how far below average we have been for the 60 through 79 range, but well above for the ranges surrounding it. So perhaps one can say that we have been cheated out of pleasant days in the 60s and 70s this year, but given that it is December, having 50s is about as good as it can get!
Voting: Good - 14 Bad - 0

Generate This Chart on Website
Mon Dec 05, 2022
Winter Weather Advisory
05 Dec 2022 05:24 AM
The National Weather Service has a wild variety of products to cover various threats to life and property. The Winter Weather Advisory is one such product that covers the nuance events that often make for travel difficulties. NWS Des Moines has issued such a product for northern Iowa this morning with the featured map highlighting the counties included in the advisory that runs until 10 AM. These generated graphics are available for any of the archived watch, warning, and advisory products that contain the programatic Valid Time Extent Code (VTEC) encoding. If you are a fan of the twitters you can follow iembot_dmx, which contains a syndication of NWS products relevant for the Des Moines County Warning Area.
Voting: Good - 13 Bad - 1

Generate This Chart on Website
Tue Dec 06, 2022
90% Of Snowfall To Go
06 Dec 2022 05:30 AM
If you consider the winter season by the accumulated snowfall received, then on average we are about 10% complete by 5 December. The featured chart presents the season snowfall total for Des Moines before 5 December and after. A lot of scatter is shown in the chart, so a fast or slow start to the season does not necessarily portend to it continuing. There is a lot of variability shown in the chart with both values as individual and significant snowfall events can heavily skew the season totals. There are chances of accumulating snow in the forecast for both this week and potentially next week as well.
Voting: Good - 8 Bad - 0

Tags:   snowfall  
Generate This Chart on Website
Wed Dec 07, 2022
Cedar Rapids First Snowfall
07 Dec 2022 05:30 AM
Cedar Rapids picked up its first daily inch of snow back in mid November, but was mostly gone not too many days later. The featured chart presents the date of first inch snowfall and the number of days snow cover persisted afterwards. There is a wild amount of variability shown with this chart and anytime snow data is used, the standard caveats of data quality apply. The red dots and arrows indicate the snows that stuck around the least amount of time and it stands to reason to see most of those coming at the beginning of the season.
Voting: Good - 11 Bad - 0

Generate This Chart on Website

Features for Dec 2022