• Member Statistics

    15,773
    Total Members
    7,904
    Most Online
    mansour
    Newest Member
    mansour
    Joined
Sign in to follow this  
Minnesota_storms

January 24 - 31 Cold Blast

Recommended Posts

2 minutes ago, Hoosier said:

48 consective hours below 0 at ORD and counting.  Looks like several more hours will be added. 

This is the longest hourly streak below 0 since Feb 1996, which was below 0 for 67 hours from the evening of Feb 1 into afternoon of Feb 4.  Won't get to 67 hours this time but anything over 48 hours is pretty rare for Chicago.

Tied for 4th longest streak on record.

Share this post


Link to post
Share on other sites
6 minutes ago, Hoosier said:

48 consective hours below 0 at ORD and counting.  Looks like several more hours will be added. 

This is the longest hourly streak below 0 since Feb 1996, which was below 0 for 67 hours from the evening of Feb 1 into afternoon of Feb 4.  Won't get to 67 hours this time but anything over 48 hours is pretty rare for Chicago.

I remember 4-5 days ago it was looking like we could stay below zero through Sunday.  Man I'm glad the models backed off of that idea lol.

  • Haha 1

Share this post


Link to post
Share on other sites

DTW smashed the record low max and record low the last 2 days. (The  Record low yesterday was unusually high for this time of year, but it would not have mattered anyway)

 

Jan 30th

Old record low max: 7°

2019 max: 1°

Old record low: -4°

2019 low: -13°

 

Jan 31st

Old record low max: 7°

2019 max: 3°

Old record low: -7°

2019 low: -14°

 

Share this post


Link to post
Share on other sites
Records recap for Chicago and Rockford
 
ORD_record_cold-1.thumb.png.51378064f19a5475657c4f73d02508ce.png
 
RFD_record_temps.thumb.png.b35dbc32b3a152b53f8bb07e3c30205a.png
 
I was working on some more numbers from this stretch, plan to add them to the site tomorrow. Was going to put out the stat about this being only the 5th occurrence of consecutive -20 or colder lows.

In discussing with a coworker how ORD only got to -21 this morning, we speculated how cold it may have gotten before all the new runways and development in the area and also a change in the siting of the ASOS. Considering that DPA got to -29, it's possible ORD may have been very close to the record everything else being equal.

Also, hard to say how much closer it would've been if winds had been calm all night. I know beavis mentioned that it may just be the site is not a good radiational cooling site anymore and we'll need the advection part of the cold shot to deliver in future extreme cold air masses.

Sent from my SM-G965U using Tapatalk

Share this post


Link to post
Share on other sites
14 minutes ago, RCNYILWX said:

In discussing with a coworker how ORD only got to -21 this morning, we speculated how cold it may have gotten before all the new runways and development in the area and also a change in the siting of the ASOS. Considering that DPA got to -29, it's possible ORD may have been very close to the record everything else being equal.
 

DPA and ORD can't really be compared, even when removing the newer development around ORD.

It is very developed around ORD overall, with dense business parks and dense suburban areas surrounding, and ORD is also much larger overall.

With DPA it's a small airport...It has a "large" rural like area just to the north heading towards Wayne, and then also south with Fermilab, and also to the east in less populated northern portions of West Chicago.

If anything, PWK is a much better comparison to ORD. PWK has dense suburban area and dense business parks to the north, east and south. Only real difference is the narrow forest-like area along the Des Plaines river just west. 

This is why PWK and ORD often have similar temps on the hotter days in the warm season and colder days in the cold season.

Share this post


Link to post
Share on other sites
13 hours ago, beavis1729 said:

ORD was kind of caught between a rock and a hard place. Too much west wind, and there was no colder air to advect in, given that the background airmass was warming significantly. Yeah, it would have been helpful for them to radiate for longer...but the winds did die down at many nearby areas at least for a little while, with a corresponding temp drop. So why not at ORD? It’s really hard to physically explain how ORD only managed -21, especially with the great starting point of -14 at 6 pm yesterday...one of the coldest temps in the area at that time. If you would have asked me at 6 pm last night, I would have said 50% chance of hitting -28, 90% chance of -25, 99% chance of -23. 

What it tells me is that ORD is an even worse radiator than we thought. Would it have really mattered if winds were calmer most of the night? I guess we will never know. Places in northern WI that warmed up to near 0 yesterday afternoon still fell to -30 this morning.

No doubt the winds were the issue. ORD had winds of 5-15mph all night, as did other metro OBS sites, which kept temps from dropping much. As you said, with no CAA associated with the winds, there was nothing to significantly drop the temp.

Out west, the wind situation was much better...though there were still issues. You would see temps drop quickly with calm winds, only to have winds kick up to 5mph and temps rise...with that progression having occurred for a while at many OBS sites.

There was just enough gradient on the northeast side of the ridge, preventing winds from totally going calm out west, and be much lower in to metro...which would have lead to much colder temps everywhere with perfect radiational cooling conditions. Probably would have seen sites like SQI/RPJ/FEP/ARR/DPA end up near -40.

Share this post


Link to post
Share on other sites

ORD is back up to 0, which ends the streak at 53 consecutive hours below freezing (If I counted correctly.)

This makes it the 4th longest such streak on record.

Most Consecutive Hours Below 0:
1. 98 Ending 12/26/1983 11AM
2. 66 Ending 2/4/1996 2PM
3. 60 Ending 1/11/1982 8AM
4. 52 Ending 1/31/2019 11PM
5. 48 Ending 1/21/1985 8AM
6. 45 Ending 1/19/1994 2PM
7. 44 Ending 1/6/1988 1PM
7. 44 Ending 1/16/1994 12PM
9. 43 Ending 1/17/1977 1PM
10. 42 Ending 1/17/1982 11PM

Share this post


Link to post
Share on other sites

Other Chicago cold stats...

Coldest Windchills:
1. -60 1/10/1982
2. -59 12/24/1953
3. -58 1/20/1985
4. -53 1/17/1982
5. -52 1/30/2019
5. -52 2/9/1933
7. -50 1/18/1994
8. -48 1/16/1977
9. -48 1/18/1930
10. -44 1/15/1994

Coldest Noon Temps:
1. -21 1/10/1982
2. -18 1/30/2019
3. -17 1/20/1985
4. -16 12/24/1985
5. -15 2/9/1933
5. -15 1/22/1936
5. -15 1/16/1982
8. -14 1/18/1994
8. -14 1/6/2014
10. -13 1/16/1977

Coldest Low Temps On Record:
-27 1/20/1985
-26 1/10/1982
-25 12/24/1983
-25 1/16/1982
-23 1/30/2019
-23 1/19/1985
-23 1/17/1982
-23 12/24/1872
-22 1/21/1984
-21 1/31/2019
-21 1/18/1994
-21 12/23/1983
-21 12/22/1872
-21 2/9/1899

Coldest High Temps On Record:
-11 1/18/1994
-11 12/24/1983
-10 1/30/2019
-10 1/25/1897
-8 2/9/1899
-7 1/16/1977
-6 12/23/1983
-6 1/29/1966
-6 2/9/1933
-6 1/4/1884

Share this post


Link to post
Share on other sites

ORD got back to zero at 1014pm on the 1 minute data stream we have in the office, so we're going with 52 hours in the data we're putting out.

Sent from my SM-G965U using Tapatalk

Share this post


Link to post
Share on other sites
18 hours ago, Hoosier said:

Records recap for Chicago and Rockford

ORD_record_cold-1.thumb.png.51378064f19a5475657c4f73d02508ce.png

 

In addition to the above, ORD tied the record low max temp yesterday of 1 (1971).

  • Like 1

Share this post


Link to post
Share on other sites
16 hours ago, michsnowfreak said:

DTW smashed the record low max and record low the last 2 days. (The  Record low yesterday was unusually high for this time of year, but it would not have mattered anyway)

 

Jan 30th

Old record low max: 7°

2019 max: 1°

Old record low: -4°

2019 low: -13°

 

Jan 31st

Old record low max: 7°

2019 max: 3°

Old record low: -7°

2019 low: -14°

 

 

DTW was below zero for 37 consecutive hours. Back on Jan 6-7, 2014, I think it was just over 40 hours. To happen twice in 5 years is amazing.

 

As an FYI, in the 146 winters since 1873-74, there were 39 winters where Detroit never fell below zero. The warmest min temp for a winter was 11F in 1997-98, the only winter there was no single digit temp recorded.

 

 

Tab4FileL.png?4d3c8e3b2450ad90a04a8ec510

 

 

Share this post


Link to post
Share on other sites

Toledo Stats

1/30 high 2 (record low maximum), low -10 (record)

1/31: high 4 (record low maximum), low -10 (record)

lowest wind chill was -38, with a temperature of 9 and a wind of 31 mph, at 10:52 AM EST on January 30th

no all-time records were broken. The all time record low is -20, the all-time record low max is -9

Share this post


Link to post
Share on other sites

The last week of January is considered the climatological dead of Winter. This year, the last week of January was the 2nd coldest on record for Detroit. The last 2 weeks of January was the 11th coldest on record. 147 years of record. Just wild to have that kind of cold in a met Winter dominated by mild.

Share this post


Link to post
Share on other sites

Congerville about to lose its extreme cold state record

 

CONGERVILLE — Last week, five weather professionals joined a conference call from their respective climate-controlled offices in Champaign, Kansas City, Asheville, N.C. and Davenport, Iowa. They were enlisted to be the final arbiters of a central question that had lingered over two Illinois communities, like a stubborn blast of polar air, for the better part of a month.

Not a lot of people were awaiting their answer. The decision mattered deeply to almost no one.

Yet there it was.

Congerville or Mount Carroll?

Reigning champ, or former champ?

A farm on the banks of the Mackinaw River in Woodford County, or a water and sewer plant next to Point Rock Park in the county seat of Carroll County in northwest Illinois?

Rick Dickinson or Bill Zink?

Minus-36 degrees, or minus-38 degrees?

“We look at three things,” said Ray Wolf, a meteorologist with the National Weather Service in the Quad Cities who was in on the conference call that would decide a new state cold temperature record. “Was the (temperature) reading meteorologically plausible in the context of the weather of the day; was it taken at a government-endorsed weather station that is archived, and was the observation taken on equipment that was working properly?”


The answers? Yes, yes and yes.

 

https://www.pjstar.com/news/20190228/congerville-about-to-lose-its-extreme-cold-state-record

 

Share this post


Link to post
Share on other sites

Here is the detailed report on the new Illinois state record low temp (-38) at Mt. Carroll on 1/31/2019: 

https://www.ncdc.noaa.gov/monitoring-content/extremes/scec/reports/20190305-Illinois-Minimum-Temperature.pdf

Good thing this unscheduled visit occurred recently...otherwise the record may have been invalidated.

On 17 October 2016 the NWS COOP Focal Point made an unscheduled visit to the site when WFO Quad Cities meteorologist reported temperature readings too low when compared to surrounding locations. Upon arrival the COOP Focal Point discovered a separated LIG minimum thermometer and replaced it with a new thermometer. Since replacing the thermometer, reported temperatures were in line with surrounding stations and no further issues were found during subsequent annual visits. The current minimum thermometer has been in service since this visit and was inspected annually for accuracy.

  • Thanks 1

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
Sign in to follow this  

  • Recently Browsing   0 members

    No registered users viewing this page.