Past IEM Features tagged: jan

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January Days Above Average

29 Jan 2016 05:35 AM
Temperatures warmed nicely on Thursday to levels above freezing and above normal for this day in January for Ames. The featured chart displays the number of days each January that the daily high temperature was warmer than the present day climatology for Ames. The total this year will come in lower than each of the past four years and below average for the month. Having said that, temperatures will finish the month with 40+ degrees possible each day for highs prior to the arrival of a major winter storm next week.

Voting:
Good: 32
Bad: 24
Abstain: 31

Tags:   jan  

Above Freezing in January

13 Jan 2016 05:35 AM
Temperatures are expected to approach freezing or just above this afternoon thanks to a warm southwesterly breeze. The featured chart is a wind rose displaying the frequency of wind speed and direction during times of having the temperature above freezing. At first inspection, the high frequencies from the northwest may seem odd, but this is a favored direction for "chinook" style winds blowing down the Rocky Mountains and into Iowa. The downward motion of this air heats it and creates a warm transport into the state.

Voting:
Good: 24
Bad: 9
Abstain: 14

Tags:   jan  

January Temps + Wind

06 Jan 2016 05:35 AM
So far this January, we have avoided the very cold temperatures. The forecast calls for that to change this weekend and combined with brisk winds, dangerous wind chills are expected. The featured chart presents the frequency of having 5+ mph winds at a given temperature in January for Des Moines. It is interesting to note the increase in frequency with warm and very cold temperatures. It takes strong winds to support these temperatures as the winds advect cold or warmer air into the state.

Voting:
Good: 16
Bad: 14
Abstain: 12

Tags:   jan  

January Maxes

28 Jan 2015 05:39 AM
The featured chart displays the warmest January high temperature for Ames for each of the past years on record. This year has seen temperatures above 50 degrees, which is just slightly above average for maximum temperature for the month. The chart shows that while each of the past four years has seen a 50+ temperature, the prior five years did not. The amount of snow pack during January makes a big difference to how warm we can get. Temperatures today are expected into the 50s for Ames, so get outside and enjoy it before winter returns!

Voting:
Good: 13
Bad: 6
Abstain: 6

Tags:   jan  


January Departures

27 Jan 2014 08:21 AM
Sunday was a wild weather day in Iowa with chinook winds pushing temperatures well above freezing for much of the state during the afternoon hours, while the rest suffered blizzard conditions. The Arctic Front eventually dropped south and put the entire state back in the deep freeze with strong winds. For Des Moines, the high temperature of 49 was well above average while the low temperature of 4 occurred around midnight and was below average. The featured chart presents the frequency of daily high and low temperature departures. Sunday's value is denoted with a 'x' on the chart. The highest frequencies on the chart do not occur at the origin (0 and 0), which is why many prefer to talk about average temperatures and not normal temperatures as the most frequent temperature are not at the mean value!

Voting:
Good: 18
Bad: 8
Abstain: 6

Tags:   jan  


Windy January

21 Jan 2014 05:38 AM
Average wind speed so far this January has been on the high side of long term average as shown by the featured chart. This has been the windiest 1-20 January period since Jan 1997, which is interesting as this season has been comparable to the fall and winter of 1996-1997 (more on this in future features). The windy conditions have helped to usher in brutal cold and some refreshing warmth so far this January. We are currently getting the cold end as temperatures and wind chills are very cold this Tuesday morning.

Voting:
Good: 28
Bad: 7
Abstain: 6

Tags:   jan   jan14  


Severe Weather Returns

26 Jan 2012 05:58 AM
After a devastating year of damaging severe weather, 2012 is starting off active with the number of warnings issued second to only 2008 since 2002. More severe weather is possible today over the southeast US.

Voting:
Good: 17
Bad: 4

Tags:   jan  


Still time to improve

27 Jan 2011 05:50 AM
According to IEM estimates, the warmest temperature recorded so far in Iowa this month was a mere 44 degrees. This makes for one of the lowest values on record only behind 1979 and 1940. Last year was not much better, with just one degree warmer value of 45. The forecast for the next few days does hold some promise that we may be able to improve on the warmest value with highs hopefully above freezing for most.

Voting:
Good: 17
Bad: 1

Tags:   jan11   jan  


To be at or above freezing

25 Jan 2011 05:50 AM
Some lucky parts of Iowa got to experience at or above freezing temperatures on Monday! For Des Moines, the experience was brief for only a few moments in the mid afternoon. The featured chart presents the number of hours at or above freezing for January measured by the Des Moines ASOS. The total number of hours so far this January is one of the smallest since the epic winters during the late 1970s. January 2006 sticks out with the number of hours totalling around 20 days worth of time! The bottom chart presents the hourly frequency of having at or above freezing temperatures. The largest percentages are in mid-afternoon at just under 40%.

Voting:
Good: 18
Bad: 6

Tags:   jan  


Snow brings the cold

20 Jan 2011 05:50 AM
The average temperature so far this month is about 5 degrees below normal for Ames with each day having snow cover so far. The featured chart presents the relationship between observed average temperature departure and number of days with snow cover for January. While the linear fit is not perfect, the relationship is fairly clear. The preliminary value so far for 2011 is shown by the plus symbol. The chart shows the coldest five months all having snow cover for 30 or 31 days.

Voting:
Good: 16
Bad: 6

Tags:   snowcover   jan