- Category Archives Severe Weather
November is off to a chilly start and longer range data suggests the chill grows more significant as we venture through the second half of the month. Officially, IND is running more than 1° below normal through the 12th.
Despite an active weather week ahead, the open to the new work week will be rather uneventful. Weak high pressure will keep us dry today and Tuesday. Fog and low clouds should give way to an increasingly bright sky by this afternoon (still more clouds than sun today) and partly cloudy skies Tuesday.
Our next weather feature approaches Wednesday in the form of a cold front. This will return showers to the area midweek. Rainfall amounts Wednesday should generally fall in the 0.25″ to 0.50″ range.
A stronger storm will impact the region as we close out the work week. Strengthening low pressure will track into the Great Lakes and drag a trailing cold front through our region Friday evening. A briefly milder southwesterly air flow will push temperatures close to 60° Friday afternoon/ evening before the sharply colder push of air blows into town for the weekend. The transition may include strong to severe thunderstorms Friday PM, and the Storm Prediction Center (SPC) has outlined a large portion of the region under a severe risk Friday. It’ll be important to stay tuned to future updates. Even outside of potentially damaging thunderstorm gusts, non-t-storm winds will gust over 40 MPH Friday.
Once the cold front sweeps through the region, a sharply colder air mass will plunge into the Ohio Valley for the weekend. Overnight data has trended even colder and would suggest falling Saturday temperatures (most of the day will be spent in the 30s) and highs only in the lower to middle 30s Sunday.
Speaking of cold, Thanksgiving week is looking unseasonably cold, and there’s also the potential of early-season snow (far too early for specifics).
- Clouds more bark than bite today
- Stormy setup Sunday
- Trending colder next week
All Eyes On Sunday…The cold front that passed through the region Thursday night and setup the gorgeous close to the work week is lifting back north this morning as a warm front. This will result in overcast conditions today, areas of sprinkles or drizzle later in the day, and rising nighttime temperatures. Scattered thunderstorms will develop across central Indiana late tonight with a warmer and increasingly moist environment.
Sunday will certainly be a day to remain weather-aware. The overall setup hasn’t changed from what was discussed yesterday with a warm and moist southwesterly air flow in place ahead of an approaching cold front and associated area of low pressure. Additional ingredients in play suggest we need to monitor the threat of large hail, damaging straight line winds, and potentially tornadoes. Individual storms (potential super cells) are expected to fire across central and northern portions of the state Sunday afternoon into early evening. These will be capable of quickly pulsing to severe levels and include potential of large hail, as well as tornadoes (particularly in the vicinity of the warm front which is expected to be draped across north-central parts of the state). Individual cells are anticipated to “morph” into a squall line Sunday evening, including potential of a quick spin-up tornado, as well as damaging straight line winds. With a moisture-rich air mass in place (precipitable water values are expected to approach 2″ Sunday evening), locally heavy rainfall is also expected.
All of our “excitement” will come to an end overnight Sunday and we’ll trend much colder (and calmer) during the new work week ahead. Our next storm system will pass by to our south Tuesday, but may be close enough to spark a light shower across central portions of the state. Drier and colder conditions build in later in the week.
Upcoming 7-Day Precipitation Forecast:
- Snowfall: 0.00″
- Rainfall: 1.50″ – 2.50″
We have growing concerns of a severe weather event Sunday afternoon and evening across the state. This morning, the Storm Prediction Center (SPC) has included most of Indiana in an “Enhanced” risk of severe weather. From this distance, all modes of severe weather seem possible, including large hail, damaging winds, and even a tornado or two.
A trough and associated cold front will slice into an unseasonably warm and increasingly moist air mass Sunday. Ahead of the approaching front, temperatures should climb into the lower 70s Sunday afternoon (average high is in the upper 50s) and dew points will reach the lower to middle 60s. While the developing surface low isn’t expected to be terribly strong, as this feature moves northeast, it’ll help drag a cold front into this warm and increasingly unstable air mass late Sunday. From this distance, conditions seem favorable for a couple of super cells to develop Sunday afternoon and evening. We’ll have to keep a close eye on the northward extent of the warm front as this would be the areas of greatest concern for potential tornadic activity Sunday afternoon. Large hail and damaging winds are also included in Sunday’s severe threat. We’re in the second severe weather season, after all, and this kind of event isn’t unusual. Late November 2013 comes to mind.
It’ll be important to remain weather-aware Sunday and stay tuned all weekend for future updates. We’ll transition to a much cooler regime (back to below average) next 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!
The Storm Prediction Center includes an Enhanced Risk of severe weather across north-central parts of the state this evening. Damaging winds are of greatest concern with the stronger storms embedded in a squall line that will move from north to south this evening (generally between 6p-midnight).
MUCH cooler air will descend into the region as we progress through the week. Temperatures will be so cool, it’ll feel more like October rather than September, including multiple nights with lows settling into the 40s and highs not making it out of the 60s.
Today will be dry and pleasant and most of Labor Day, itself, will follow suit. We’ll notice an increasingly gusty southwest wind by afternoon and this will help boost temperatures into the upper 80s Monday afternoon.
However, once to Labor Day evening, attention will shift off to our north as a line of thunderstorms approaches. A few embedded storms within this line may reach strong-to-severe levels. Damaging straight line winds are of greatest concern with the stronger storms. The Storm Prediction Center has included the region in a Slight Risk of severe weather Monday evening.
After a mostly dry and warm Labor Day, we’ll focus on the evening hours (bracketing 6p-10p) for storms to rumble in. As mentioned, a couple of these could reach strong to severe levels.
Once the front blows through, our winds will shift to the northwest and help usher in a much cooler air mass. Average highs in the upper 60s and lows in the upper 40s don’t occur until early-October. We’ll be around 30 days ahead of schedule throughout the majority of the upcoming week, as overnight lows in the upper 40s to around 50 and highs in the upper 60s to around 70 will be common.