|
(12:45PM - 10/19/20) A disturbance moving through the region will bring a surprise snow event to portions of Northern Illinois this afternoon.
Summary... A disturbance moving through the region will bring a surprise snow event to portions of Northern Illinois this afternoon. This event has not been well modeled, as most model guidance had little to no precipitation, let alone snow. (Kudos to the GFS model for consistently being the model to show some snow). An area of snow has been moving across Iowa this morning into early this afternoon, with a swath of accumulation across the heart of Iowa...Upwards of 3-8" in some areas north of Des Moines. While temperatures have been well above freezing this morning across Northwest Illinois, dynamic and evaporative cooling is accruing, which will allow precipitation to fall as snow. This area of snow is now entering Northwest Illinois, where a period of moderate to heavy snow is likely this afternoon. Accumulation is possible, if not likely, in a swath across portions of Northwest Illinois...Where upwards of 1-4" may be possible in the heaviest axis. Outside of this axis, only up to a dusting is possible. Further east, warmer temperatures will into the 40's exist across North-Central and Northeast Illinois. While some cooling of temperatures may occur due to the aforementioned dynamic and evaporative cooling processes occurring, not enough cooling will be possible...Thus, across North-Central Illinois rain may only change over to snow or a rain/snow mix for a short time and only rain is expected across Northeast Illinois. Below is the snowfall forecast for this snow event. 
JP
1 Comment
(10:15AM - 10/17/20) A storm system moving through the region today will bring high winds and elevated fire danger to much of the state.
Summary... A storm system moving through the region will bring high winds and elevated fire danger to the state today. Winds are gradually increasing across the state this morning, with the period of highest winds likely from late this morning through early this evening, before diminishing during the evening. Wind gusts of 35-55MPH will be common across a large portion of the state during this period. Winds will be strong enough to blow around loose and light weight items, and potentially be enough to cause isolated minor tree damage. In addition to the high wind threat, an elevated fire danger will exist as well across the heart of the state. The combination of continued overall dry conditions across much of the state, lower dew points/humidity, and high winds...will lead to an elevated fire danger. Any fall field and foliage burning should be held off for calmer weather day. Below is the high wind and fire danger forecasts for this morning - tonight.
(8:45PM - 10/16/20) A storm system moving through the region on Saturday will bring high winds and elevated fire danger to much of the state.
Summary... A storm system moving through the region will bring high winds and elevated fire danger to the state on Saturday. Winds will gradually increase across the state Saturday morning, then continuing through the day, before diminishing during the evening. The period of highest winds will be roughly from late Saturday morning through early Saturday evening, when wind gusts of 35-55MPH will be common across a large portion of the state. Winds will be strong enough to blow around loose and light weight items, and potentially be enough to cause isolated minor tree damage. In addition to the high wind threat, an elevated fire danger will exist as well across the heart of the state. The combination of continued overall dry conditions across much of the state, lower dew points/humidity, and high winds...will lead to an elevated fire danger. Any fall field and foliage burning should be held off for calmer weather day. Below is the high wind and fire danger forecasts for Saturday morning - Saturday night.
(5:45PM - 10/15/20) A storm system moving through the region today will bring high winds and elevated fire danger to much of the state.
Summary... While a good portion of Northern and Central Illinois already saw a freeze and several occurrences of frost this month, the growing season has still not been deemed over...which is usually designated after a killing freeze (lows 28 degrees or colder) or by November. Thus, frost advisories and freeze warnings have been issued by the NWS across much of the state. A freeze to near freeze is expected across a large portion of the state tonight, with a frost likely across just about the entire state. Low temperatures will range from the upper 20's to low 30's across Northern Illinois (Low-upper 30's in immediate Chicago metro), the upper 20's to mid 30's across Central Illinois, to the low to upper 30's across Southern Illinois. It is possible that if conditions become prime, that a few usual rural/prone cold locations in Illinois could reach the mid 20's. 
JP
(11:30AM - 10/14/20) A storm system moving through the region today will bring high winds and elevated fire danger to much of the state.
Summary... A storm system moving through the region will bring high winds and elevated fire danger to the state today. Winds have been gradually increasing across the state this morning, and will continue to do so into the early afternoon. The period of highest winds will be roughly from midday into this evening, when wind gusts of 35-50MPH will be common across a large portion of the state. During the evening winds will quickly diminish, when a cold front will be quickly sweeping across the state. On the backside of the storm system, winds will once again increase overnight across Northern and Central Illinois, with wind gusts of 20-35MPH possible. In addition to the high wind threat, an elevated fire danger will exist as well across the heart of the state. The combination of continued overall dry conditions across much of the state, lower dew points/humidity, and high winds...will lead to an elevated fire danger. Any fall field and foliage burning should be held off for calmer weather day. Below is the high wind forecast for this morning - tonight.
(11:00AM - 9/6/20) A storm system moving through the region today will bring a low end threat for severe t'storms to Northern and portions of Central Illinois.
Summary... A complex of scattered showers and t'storms has been moving across Northern and portions of Central Illinois this morning. A few isolated strong to severe t'storms occurred with this complex earlier this morning, with damaging winds and large hail having been the main threats. This complex is will be quickly diminishing and moving out of the state by early afternoon. In the wake of this activity, some clearing and destabilization will occur. At this time it appears that additional isolated to scattered showers and t'storms will develop this afternoon along an advancing cold front, across portions of Wisconsin, Iowa and Northwest Illinois. This activity will then push east-southeast across portions of Northern Illinois, posing an isolated severe t'storm threat later this afternoon into tonight. An environment in place will feature low to moderate instability, moderate moisture, good shear and good forcing. Upwards of a minimal severe t'storm threat is expected across portions of Northern Illinois. Damaging winds, large hail and an isolated tornado will be the main threats. Below is the severe t'storm forecast for this morning - tonight. 
(10:00PM - 9/6/20) A storm system is expected to move through the region on Sunday, bringing a low end threat for severe t'storms to Northern and portions of Central Illinois.
Summary... A complex of scattered showers and t'storms is expected to spread across Northern and portions of Central Illinois, Sunday morning into early Sunday afternoon. A marginal environment will be in place, which will support an isolated severe t'storm threat, with damaging winds and large hail being the main threats. In the wake of this activity, the amount of clearing and destabilization that occurs is in question, and thus casts doubt on the secondary potential for Sunday afternoon into Sunday night. At this time it appears possible that additional isolated to scattered showers and t'storms will develop Sunday afternoon along an advancing cold front, across portions of Wisconsin, Iowa and Northwest Illinois. This activity will then push east-southeast across portions of Northern Illinois, posing an isolated severe t'storm threat late Sunday afternoon into Sunday night. An environment in place will feature low to moderate instability, moderate moisture, good shear and good forcing. Upwards of a minimal severe t'storm threat is expected across portions of Northern Illinois, during both rounds of activity on Sunday. Damaging winds, large hail and an isolated tornado will be the main threats. Below is the severe t'storm forecast for Sunday morning - Sunday night. 
(10:45AM - 9/5/20) A storm system is expected to move through the region on Sunday, bringing a low end threat for severe t'storms to Northern and portions of Central Illinois.
Summary... A complex of scattered showers and t'storms is expected to spread across Northern and portions of Central Illinois Sunday morning. A marginal environment will be in place, which could support an isolated severe t'storm, with damaging winds and large hail being the main threats. In the wake of this activity, the amount of clearing and destabilization that occurs is in question, and thus casts doubt on the potential for Sunday afternoon into Sunday night. At this time it appears possible that additional isolated to scattered showers and t'storms are expected to develop Sunday afternoon along an advancing cold front, across portions of Wisconsin, Minnesota, Iowa and Northwest Illinois. This activity will then push southeast across Northern and portions of Central Illinois, late Sunday afternoon into Sunday night. An environment in place will feature low to moderate instability, moderate moisture, good shear and good forcing. Upwards of a minimal severe t'storm threat is expected across portions of Northern Illinois. Damaging winds, large hail and an isolated tornado will be the main threats. Below is the severe t'storm forecast for Sunday morning - Sunday night. 
(9:45PM - 9/4/20) A storm system is expected to move through the region on Sunday, bringing a low end threat for severe t'storms to Northern Illinois.
Summary... A complex of scattered showers and t'storms is expected to spread across Northern and portions of Central Illinois Sunday morning. In the wake of this activity, some clearing and destabilization will occur. Additional scattered showers and t'storms are expected to develop Sunday afternoon along an advancing cold front, across portions of Wisconsin, Minnesota, Iowa and Northwest Illinois. This activity will then push southeast across Northern and portions of Central Illinois, late Sunday afternoon into Sunday night. An environment in place will feature low to moderate instability, moderate moisture, good shear and good forcing. Upwards of a minimal severe t'storm threat is expected across portions of Northern Illinois. Damaging winds, large hail and an isolated tornado will be the main threats. Below is the severe t'storm forecast for Sunday morning - Sunday night. 
(3:30PM - 9/1/2020) Summer 2020 ended up as the hottest summer on record for Chicago, with an average temperature of 76.7 degrees. Summer is considered June 1st - August 31st. The average temperature takes into account high and low temperatures from each summer month (June/July/August), which is averaged out to get the overall summer average temperature.
In addition to the summer record...June 2020 finished tied for the 6th warmest June on record, July 2020 finished as the 4th warmest July on record, and August 2020 finished tied for the 6th warmest August on record. There were 30 days which featured a high temperature of 90 degrees of higher (31 total this year), with the highest temperature of the summer being 97 degrees on August 24th. While there were many hot days, including a few heat waves, extreme heat was fairly limited overall...with the record for this summer being mostly attributed to consistently warm temperatures, both day and night. Looking into a comparison of this summer compared to the other summers on the top 5 list...Most of the other summers featured more extreme heat, including days with temperatures into the 100's. What occurred this summer shows that a summer with consistent warmth and some heat can be just as significant statistically as a summer that has more significant bouts of extreme heat.
(Side note: Some will notice that 1988 did not feature a top 5 hottest summer. Summer 1988 featured several bouts of extreme heat, including numerous days with high temperatures into the 100's. However, there were also several bouts of cooler (Even below average) temperatures throughout the summer. Additionally, a significant drought was in place, with moisture and high humidity lacking. This aided in cool overnight low temperatures, well below average at times, which skewed the overall average summer temperature much lower than it could have been. 
|
Archives
September 2020
categories
All
|
RSS Feed