- Category Archives Forecast Models
October, month-to-date, has been nothing short of a blow torch. Officially, IND is running +9° through the 11th.
In coffee shops and my travels around the great state of Indiana, I’ve overheard lots of talk centered on because October has been so warm, another lackluster snow season awaits. Let us remind you that the infamous snow season of ’13-’14 featured a very warm first half of October.
The upcoming 7-10 days will feature more of a transitional period of weather that we’ve come to know and love around these parts. Warmth will spread northeast this weekend ahead of an approaching cold front (around 80° Saturday) before falling temperatures Sunday afternoon behind the frontal passage. The chilliest air so far this season will descend upon the region early next week. That said, the chill won’t hold and another surge of above normal warmth will spread northeast by the latter parts of next week.
A more significant pattern change appears dialed up prior to Halloween and this is one that seems suited to lead to more prolonged and significant cold to wrap up the month and head on into November. Notice the evolution of things from October 21st to the 25th, courtesy of the GEFS off the fantastic tropicaltidbits.com. Other model data is in general agreement, leading to a rather high confidence level for this time period.
It should also be noted that analog data and research also would lean heavily in the cold direction to wrap up October and these findings also favor a chilly November… More on that later! Speaking of later, an updated 7-day will be posted this evening. Make it a great day!
For a change, the past (7) days has been generous to central Indiana from a precipitation perspective. As we’ll discuss, a new rain maker awaits this week.
Officially, IND sits at 0.26″ above normal, month-to-date.
It’s also been an incredibly warm start to the month (IND is running 10° above normal, month-to-date) and that warm theme won’t change through the near-term.
An all-too-familiar pattern engulfs the country late week. This will showcase more “bonus” summer-like conditions, locally, that will include highs approaching 80° next weekend with a strong southerly flow in place. Additionally, early winter-like conditions will continue to impact the western high ground. The pattern definitely represents a Nina look.
In the shorter-term, a new rainmaker will move across the Ohio Valley Tuesday into Wednesday. This will spread showers and embedded thunder across the state Tuesday PM into Wednesday. In general, this storm system should deliver 0.50″ – 1″ of rain, but there will be locally heavier amounts.
Thereafter, dry times will settle in along with slightly cooler temperatures. Let’s remember it was only a few days ago where modeling suggested a “pop” of the season’s coldest air thus far. No longer is that the case, and while it will turn briefly cooler, temperatures will still remain above average.
A southerly air flow will return late week and help boost temperatures next weekend, along with continued dry times through the balance of the weekend. From this distance, our next storm system should arrive late Sunday or early Monday in the form of a cold front.
Looking longer-term, there are indications that colder conditions loom as we wrap up October and head into November and we’ll discuss this in more detail later this week…
October has gotten off to a warm start (+ 8.4° at IND, to be exact) and that will continue this weekend as high temperatures top out between 80° – 85° Saturday.
In addition to Saturday’s warmth, southwest winds will gust over 35 MPH at times- especially during the afternoon hours.
Most of Saturday will remain rain free, but we’ll need to keep an eye towards the western horizon Saturday afternoon as a frontal boundary helps kick up a line of thunderstorms.
The Storm Prediction Center (SPC) includes a large portion of Indiana under a marginal risk of severe weather Saturday. While widespread severe weather isn’t anticipated, a couple of embedded gusty storms are a good bet Saturday afternoon and evening.
The biggest concern with stronger storms is gusty straight line winds. While the line of storms should be relatively “skinny,” don’t be surprised if one or two of the storms requires a warning. Here’s an idea of what the radar may look like around 9p Saturday.
We’ll turn less humid and slightly cooler for the second half of the weekend!
There are no changes to our ongoing forecast of “bonus” summer-like conditions into early next week. Highs will continue to zoom into the upper 80s and overnight lows will remain well above average (mid-to-upper 60s). (Keep in mind, averages now feature highs in the mid-70s and lows in the mid-50s).
However, a cold front will approach the middle part of next week and while this won’t be an efficient rain producer, it will serve to deliver a return of fall-like air as we close September and open October. From a precipitation stand point, rainfall amounts look “anemic” at best over the upcoming 7-10 days.
At this distance, scattered showers and thunderstorms are possible with the FROPA, but many will remain rain-free and even those that do pick up a shower or storm shouldn’t expect significant rains. What will be a much bigger deal will be the return of an authentic fall feel by next Friday, continuing into early October.
So far this month, unseasonably cool conditions have set up shop across the eastern portion of the country (IND is running more than 4° below normal through the 16th) while the west has experienced a much warmer than average pattern.
That will flip around in big time fashion this week as a highly amplified pattern takes hold. The mean trough position will shift into the west and lead to an early taste of winter, including mountain snow. Meanwhile, our region will make up for lost time in the summer department, including highs generally in the mid to upper 80s (around 10° above average).
Daily chances of widely scattered afternoon and evening thunderstorms will be with us beginning today through the majority of the upcoming week. Everyone won’t get wet, but there will be a couple of localized heavy downpours on area radars at times. As dry as we’ve been, we’ll take what we can get.
Eventually, the pattern will “relax” (at least briefly) out towards Day 10. This will feature a more seasonable regime returning to the region, along with better chances of more widespread rains as a cold front approaches. We’ll also have to keep a close eye on additional tropical threats to the southeast region…