The upper air pattern this week will feature a trough across the Northeast and Great Lakes with an upper ridge anchored over the Four Corners.
Temperatures will run below average from the Ohio Valley into the MS Valley, with well above normal temperatures expected across the West.
Most of the country can expect below to well below average precipitation in the week ahead. The one exception? Northern New England.
We only forecast 0.10″ to 0.25″ of rain here in central Indiana during the 7-day period.
Forecast Period: 09.05.21 through 09.12.21
A very quiet weather pattern will settle into the region as we go through the upcoming week. The one exception to that is Tuesday night as a cold front quickly passes through the area. Moisture levels will return ever so slightly ahead of the boundary and may be enough to produce a couple of storms Tuesday evening (widely scattered coverage). The front will help to reinforce the dry airmass in place, along with provide cooler temperatures for mid and late week. As we look ahead beyond this week, indications are that things will moderate and turn a bit more active (though that’s admittedly not saying much, considering just how quiet things will be this week).
An upper level ridge will expand across the Ohio Valley through the upcoming week. Meanwhile, a trough will continue to provide unseasonably chilly air for the northern Rockies and inner-mountain region.
Well above average temperatures will take up shop from the central Plains into the Great Lakes and Northeast. Unseasonably chilly conditions will prevail across the northern/ central Rockies.
Above normal precipitation is expected in association with Henri across New England. The northern Plains and upper Midwest can also expect above normal rainfall in the week ahead.
We forecast on average between 0.50″ and 1.00″ of rain across central Indiana in the upcoming 7-day period.
Forecast Period: 08.22.21 through 08.29.21
The overall weather pattern in the week ahead will feature an expanding ridge of high pressure into the Ohio Valley and lower Great Lakes. This will lead to oppressive heat and humidity expanding northeast (multiple days of highs into the lower 90s with high humidity values will make it feel closer to 100° through early and middle parts of the work week). Meanwhile, a persistent trough will continue to take up residence through the early part of the forecast period across the northern Rockies (additional early season snow will fly for the high peaks above 12k feet). The other big story during this forecast period? Henri, of course. Henri will deliver quite a blow to our friends in New England beginning later today, continuing a heavy interior rainfall threat through the early and middle part of the work week.
Back here on the home front, each and every day will feature isolated storm coverage. While “isolated” is the key word, if you find yourself under one of these storms, a quick 1″+ of rain is a good bet with the moisture content we’ll be dealing with. Somewhat better storm coverage is anticipated during the 2nd half of the work week (we’ll label it “widely scattered to scattered.” ;-)).
The 7-day period will be dominated by an eastern ridge while a trough carves itself into the inner-mountain West.
Below normal temperatures will take up shop across the inner-mountain West and spread throughout the south. Meanwhile, anomalous warmth will prevail across the upper Midwest, Great Lakes, and into the Northeast, and Mid Atlantic.
Tropical moisture will lead to well above normal rainfall across the Southeast and into southern Appalachia.
We forecast on average between 0.50″ and 1.00″ of rain across central Indiana during the week ahead.
Forecast Period: 08.15.21 through 08.22.21
The past 36 hours has provided a nice change of pace as of late with lower humidity and cooler temperatures. (Several reporting sites across northern Indiana are in the lower 50s this morning with middle 50s as far south as the Indianapolis suburbs). As we look to start the new week, humidity will be on the increase along with a daily chance of scattered thunderstorms beginning as early as Monday, continuing Tuesday. We will try and inject briefly drier air in here Wednesday which should reduce coverage of “splash and dash” storms before scattered storms return to close the week. As we look ahead to Saturday, better storm coverage is expected as a cold front moves through the region.
A couple of other items of interest on a broader scale include the first snow of the young season falling across the northern Rockies this week, as an early shot of winter-like air descends south from Canada. Also, from a tropical perspective, we’ll keep close eyes on what comes of Fred and Grace. As it sits today, we still don’t anticipate impacts here in central Indiana from either systems.
The predominant upper air pattern this week will feature “troughiness” centered in the Ohio Valley with ridging across the PAC NW.
Below normal temperatures will be found from the southern Plains east and northeast (greatest departures from normal across the MO and western OH Valley region) as we progress through the first week of August.
Wetter than normal times can be expected across the Gulf Coast and up the eastern seaboard, along with the inner-mountain region.
We only expect central IN area rain gauges to accumulate between 0.10″ and 0.20″ on average over the upcoming period.
Forecast Period: 08.01.21 through 08.08.21
A secondary cold front will slip through the state this afternoon and may spark an isolated shower or thunderstorm, but “isolated” is the key word. Most will stay rain free in the upcoming week as high pressure dominates. This will be a quieter start to August than is typical, and also much cooler and less humid than we’d expect. In fact, multiple nights this week will feature low temperatures falling into the mid and upper 50s, especially outside of the city, itself. Out next best chance of organized showers and thunderstorms can be expected next Sunday. Enjoy the unusually quiet, cool, and dry weather. We’ll moderate (and turn more active) as we head into Week 2…
The ‘mean’ upper air pattern will feature a persistent trough over New England with a ridge (hot dome) across the central Plains in the upcoming 7-day period.
Well above normal temperatures will be anchored across the central Plains and points north and west through the upcoming week. New England will feature below normal temperatures. After a hot start to the week, temperatures will cool late week, locally.
Above normal rainfall can be expected across the Great Lakes region into New England.
In general, we forecast between 0.50” and 0.75” of rain in the upcoming 7-day period across central Indiana, but there will be locally heavier amounts.
Forecast Period: 07.24.21 through 07.31.21
The upcoming 7-day period will place the Great Lakes and Ohio Valley in a northwest flow aloft. This is a notorious pattern for “ridge riding” thunderstorms to roll right into the general region (and sometimes during the hours not typical for storms this time of year – overnight and early morning). While it’s impossible to say exactly when and where these potential storm clusters may track, we’ll keep a watchful eye on the short term period through midweek across our general area. Sometimes these storm clusters are capable of more widespread damaging wind. While the most persistent, serious heat will be well off to our northwest, we can expect a few hot days to open the forecast period (low 90s) before we cool significantly late next week and into next weekend.
