Indiana’s Weather For Saturday

HEADLINES
– Mostly clear and nice this weekend!
– Rain and storm chances return Monday into Wednesday.
– Near-record warmth Thursday and Friday.

TODAY’S MAP

NWS TECHNICAL DISCUSSION

Generally quiet weather expected through the weekend with surface

high pressure sitting over the region. Aloft, a rex block pattern is

now established over the CONUS with strong ridging through the

northern tier and an upper low over the north Gulf Coast. A

secondary surface high currently over central Canada is moving

southeastward, which will push a weak cold front southward later

today.

Until that front arrives, winds look to be calm or light and

variable at times. Temperatures should warm up quickly as ridging

strengthens aloft with highs 10 degrees or so warmer than yesterday.

Though Indiana is within greater influence of the upper ridging,

some high cirrus from the upper low to our south will creep into the

area at times. Dew points may need to be nudged down a bit like

yesterday since deep boundary layer mixing is once again anticipated.
The aforementioned cold front arrives around 00z, with increasing

northeasterly winds behind it. Winds increase to about 10 knots,

with some gusts up to 20 knots possible at times. The best chance of

gusts that high are further north, since the front will be

temporarily strengthened by the cool waters of Lake Michigan. The

boundary then weakens and looses definition as it heads southward

tonight.
Lows tonight should be a few degrees warmer despite the fresh shot

of cooler air. Increased surface winds are the reason, as the

effects of radiational cooling are somewhat minimized. Still,

temperatures dipping into the upper 40s are expected. Some values in

the low 40s are possible in rural areas. The coldest temperatures

will be across the northwestern portions of our CWA due to greater

influence from lake-modified air.
&&
.LONG TERM (Sunday through Friday)...

Issued at 321 AM EDT Sat May 10 2025
For Sunday, amplified high pressure extending from the Midwest

northeastward into western Quebec...will provide another lovely,

albeit rather warm spring day to end the weekend.  Moderate breezes

will return as surface flow veers slightly to easterly...continuing

the increasing trend of dewpoints from the 40s to around 50F for

most locations during the day.  Ample morning sun will yield to

increasing high clouds...yet readings will rebound 30, to perhaps 35

degrees along the Wabash Valley...with widespread afternoon highs in

the 75-80F range.
Confidence is increasing in the remainder of the long term bringing

a noticeably more humid, and at times showery transition through the

Monday-Wednesday timeframe...into the local region`s first taste of

distinctive summerlike weather during Thursday-Friday. The blocked

synoptic pattern that will have brought several placid days this

weekend to central Indiana...courtesy of the stacked ridge resting

to the north of a broad cut-off trough centered along the Lower

Mississippi Valley...will break down, bringing this broad yet

rather weak disturbance over most of the Midwest through the early

to mid-week. However, showers/few t-storms may only exhibit any

real organization in the Monday afternoon to late Tuesday

timeframe, when better deep moisture overlaps with the slowly-

passing trough`s rather weak forcing. So far widespread light

precipitation totals, with more isolated/embedded moderate

rainfall, is expected.
The next weather system slowly crossing the western CONUS will be a

stronger trough, which should actually lift slightly while

spinning into the northern Plains by Thursday...allowing a

strengthening subtropical ridge over the south-central US to build

from northern Mexico/Texas into the Ohio Valley/Midwest. 1000-500

mb thickness approaching 575 dm and H850 temperatures near 20

degrees Celsius should translate to near-record afternoon highs

both Thursday and Friday...while anomalously high morning minimums

are guided by dewpoints persisting in the 60s. Additional chances

for showers/TRWs will accompany the broad and slowly-passing warm

frontal zone extending out of the northern system`s deepening

surface low near the Red River of the North. A cool-front type

boundary extending south of this cyclone should bring a noticeable

step back towards seasonable conditions by the very end of the

long term period. Indianapolis` record high next Thursday is

88F...87F is the current forecast max.
&&

 
NWS CHARTS FOR TODAY/TONIGHT










			
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