June 2026 Observations and Discussion.

Clinton · May 28

Meteorological summer will likely kick off with some excessive heat for the upper Mississippi Valley. Hopefully any drought that develops will get wiped out rather quickly when a more active pattern and western trough should develop late June or early July.

Hoosier · May 28

Definitely agree with the risk of rapid/flash drought onset around these parts. Evaporation rates start to get fairly high at this time of year so a couple weeks of little to no rain can dry things out pretty quickly.

StormchaserChuck1 · May 28

A little different from developing Strong Nino analogs

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Clinton · May 29

1 hour ago, Hoosier said:

Definitely agree with the risk of rapid/flash drought onset around these parts. Evaporation rates start to get fairly high at this time of year so a couple weeks of little to no rain can dry things out pretty quickly.

I was thinking the same thing, it would probably take an inch of rain a week to prevent drought with the temps expected.

Iceresistance · May 29

I love this
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Clinton · May 29

Reed Timmer circling the KC area for potential severe weather Sunday.

HIGH-CEILING SEVERE WEATHER WITH EVENING #TORNADO THREATS THIS WEEKEND (Saturday-Sunday) across Nebraska and Kansas.

The following are target areas for Team Dominator this weekend in tornado intercept mode for science.

Upper-level troughs during late May can seem a little wispy at times, but you do not need much flow at 500 mb with low-level easterly winds and big instability. These maps show the trough shape with 0-3 km EHI to show the instability.

westMJim · May 29

June is the start of meteorological summer. Here in Grand Rapids the current mean temperature for June is 69.9° the average amount of rainfall is 3.94”. The top 5 warmest months of June at Grand Rapids are 1. 74.2 in 1919, 2. 74.0 in 1933, 3. 73.4 in 1921, 4. 73.2 in 1934 and 5. 72.9 in 2005. The top 5 coolest are 1. 61.8 in 1969, 2. 61.9 in 1928, 3. 62.0 in 1958, 4. 62.3 in 1926 and 5. 62.5 in 1945. The top 5 wettest are 1. 13.22” in 1892, 2. 8.49” in 2021, 3. 8.21” in 1967, 4. 8.04” in 2010 and 5. 8.03” in 1928. The top 5 dryest are 1. 0.25” in 1988, 2. 0.59” in 1959, 3. 0.62” in 1984, 4. 0.83” in 1908 and 5. 1.00” in 1904. It don’t reach 90° or better every June but the average number of days of 90 or more is 3 the record number is 12 in 1933, last year there were 5. The all time highest temperature for June is 102 on June 1st 1934 and again on June 20th 1953. In June 1916 the highest temperature for the month was just 81. The record coldest low for June is 32 on June 4th 1945 that was the 2nd night with 4 nights in the row with lows in the 30’s in fact lows in the 30’s are very common in June at Grand Rapids. With the temperature dropping below 40 in 33 years in Grand Rapids.

Tom · May 29

14 hours ago, Clinton said:

Meteorological summer will likely kick off with some excessive heat for the upper Mississippi Valley. Hopefully any drought that develops will get wiped out rather quickly when a more active pattern and western trough should develop late June or early July.

Should be a pretty interesting "Ring of Fire" pattern setting up and this should also help fire up the Monsoon over my area in Arizona late month.

Clinton · May 29

36 minutes ago, Tom said:

Should be a pretty interesting "Ring of Fire" pattern setting up and this should also help fire up the Monsoon over my area in Arizona late month.

I think it will. Are El Ninos typically good for the monsoon rains in your area?

Tom · May 30

11 hours ago, Clinton said:

I think it will. Are El Ninos typically good for the monsoon rains in your area?

TBH, I have no idea as I really have never paid attention to that since I didn't live out here. Maybe @Black Holecan chime in since he lived here for a while.

westMJim · May 30

Tomorrow is the 28^th anniversary of the May 31^st derecho that swept across Michigan.

It’s important not to confuse derechos with squall lines — both are lines of thunderstorms, but they behave differently. A squall line typically forms along or just ahead of a cold front and marks the boundary between air masses. Some squall lines stretch more than 1,000 miles and can travel similar distances in extreme cases. But while squall lines may weaken quickly or bring scattered severe weather, derechos tend to sustain their intensity and deliver widespread, long-track wind damage.

On May 31, 1998 a long-lived derecho that tore through Grand Rapids and West Michigan during the early morning hours, packing straight-line winds between 90 to 130 MPH. It remains one of the most devastating and costliest weather events in the state's history. The storm hit Sunday, May 31, 1998, arriving just before 5:00 a.m. The storm raced across Lower Michigan at a speed of about 70MPH with on the ground wind speed of 60 to 90MPH but here in my area NW of Grand Rapids the winds were estimated between 90 and 130 MPH. The storm killed 4 people and injured 146. Hundreds of homes and businesses in the Grand Rapids area were completely destroyed. An estimated 860,000 Consumers Energy customers lost power—a historical record for outages in the state that stood for nearly two decades. Some Grand Rapids neighborhoods and surrounding rural communities were left without electricity or running water for up to 10

This year the end of May will be much calmer with sunny skies and mild temperatures. The next 7 days will be sunny, dry and warm with the next chance of showers not until next Friday. The official H/L yesterday at Grand Rapids was 78/48 there was no rainfall and with that low of 48 there were 2 Heating Degree Days. For today the average H/L is 75/54 the recored high of 92 was in 1919 the coldest high of 48 was in 1910 the record low of 34 was in 1965 and 1996 the warmest low of 68 was in 2018 and 1987. The most rainfall of 1.91” was in 1989. Last year the H/L was 72/46.

chescowxman · May 30

As we get into the summer months lower elevation (<450 ft asl) areas of Chester County PA will see at least one heat wave (defined as 3 or more consecutive days with highs at 90 degrees or above) while the relatively higher ridge locations (>600 ft asl) only average a heat wave every couple of years or so. Below sorted by highest to lowest elevation is a ranking of all reporting stations since 2000 with their recorded heat waves. Our lowest elevation spot at Phoenixville averages a whopping two to four times the number of heat waves as almost all other locations across the county.

Hoosier · May 31

Bit of a change on the new CPC outlook for June. The new one is more in line with what the various weekly/monthly models have been suggesting.

Old:

New:

StormchaserChuck1 · May 31

12z EPS really went warm in the Great Lakes/Northeast for the first half of June!

StormchaserChuck1 · June 1

One year ago today at midnight it was 39 degrees!

Hoosier · June 1

26 minutes ago, StormchaserChuck1 said:

One year ago today at midnight it was 39 degrees!

Impressive. I had a low of 37 on June 1 last year, which was about the coldest temp that I can personally recall in June.

westMJim · June 1

Welcome to meteorological summer, meteorological summer at Grand Rapids has a mean of 70.9°. The warmest summer was 74.7 in 1955 the coldest summer was 65.5° in 1992 last year the mean temperature was 72.1. On average there are 11 days in meteorological summer at Grand Rapids the most was 36 in 1988 there have been two years when there were no days of 90 or more 2014 and 1950 last year there were 15. On average there is 11.35” of rainfall in meteorological summer the wettest was 22.63” in1994 the dryest was 3.08” in 1894. Last year Grand Rapids had 6.83”

The overnight low here in my yard was 53 with clear skies. The next seven days look to be on the mild/warm side, no chance of rain until the weekend and then a chance over the weekend. Highs will continue to be warm ranging from the upper 70’s to mid 80’s low will range from near 50 to the low 60’s. Winds will be mostly out of the east to northeast until later in the week.

The month of May at Grand Rapids had a mean of 56.6 that is a departure from average of -2.6° The high for the month was 85 on the 17^th the low was 32 on the 12^th there were only 9 days above average and 22 days below average. It was also a dry month with only 1.85” of rainfall that is a departure of -2.15”. The official H/L yesterday at Grand Rapids was 76/44 there was no rainfall the day had 5 Heating Degree Days. There was no significant weather events. For today the average H/L is 75/54 the record high of 102 was in 1934 the coldest high of 50 was in 1946 the record low of 36 was in 1993 the warmest low of 74 was in 1934. The most rainfall of 2.65” was in 1970. Last year the H/L was 68/39.

Some weather history for June 1^st 1987, Severe thunderstorms in the Upper Mississippi Valley and the Lower Ohio Valley produced wind gusts to 81 mph at Albert Lea Airport in southern Minnesota, and baseball size hail around Otterbein IN, Sarona WI, and Danville IL. Two inches of hail totally destroyed 5000 acres of corn and soybean north of Danville. (The National Weather Summary) (Storm Data) Here in Michigan 1934: Blistering heat begins the month in one of the Dust Bowl summers of the 1930s. The mercury soared to 102 degrees at Grand Rapids and 97 degrees at Lansing. The 102 degree reading at Grand Rapids is tied for the highest June temperature with June 20, 1953.

Clinton · June 1

Warm and sticky this afternoon, it's currently 86 with a dp of 70 and a heat index of 91.

Next week looks toasty

Niko · June 1

Gorgeous weather here in S MI continues. Ton of sunshine w mild days and chilly evenings.

summerrules · June 2

Another top 10 hottest June this year for Chicago? Lmao

StormchaserChuck1 · June 2

So ready for the Summer. Door open in June here and it's in the mid 50s. Feels cold.

Hoosier · June 2

3 hours ago, summerrules said:

Another top 10 hottest June this year for Chicago? Lmao

Would have to put up a mean temp of 74.0 (anomaly of +3.4) or better to do that.

Black Hole · June 2

On 5/29/2026 at 7:49 PM, Tom said:

TBH, I have no idea as I really have never paid attention to that since I didn't live out here. Maybe @Black Holecan chime in since he lived here for a while.

El nino's lean wetter than normal, but particularly later in the season with the monsoon and extra tropical season being enhanced.

westMJim · June 2

After a warm sunny day yesterday with clear skies and a calm wind it has now dropped down to 49 here in my yard. It is officially 47 at GRR. It will continue to be sunny and mild with no chance of rain until at least Friday when a chance of showers could happen. Temperatures will be in the low to mid 80’s lows will be in the 50’s before warming up into the 60’s The weekend looks to be warm with a better chance of showers.

The official H/L yesterday at Grand Rapids was 80/52 there was 1 Cooling Degree Day. There was no rainfall the highest wind gust was 26 MPH out of the E. This has been one of the longest stretches of days with winds out of the east and northeast that I can remember. For today the average H/L is 76/55 the record high of 95 was in 1934 the coldest high of 47 was in 1910 the record low of 35 was in 1956 the warmest low of 69 was in several years the last time was in 2014. The most rainfall of 1.42” was in 2009 Last year the H/L was 79/39.

Some weather history for June 2^nd 1917, The temperature at Tribune, KS dipped to 30 degrees to establish a state record for the month of June. (The Weather Channel) Here in Michigan 1910, It was a cold day in June as temperatures in the upper 40s in the afternoon were more typical of late March. The high of 47 at Grand Rapids and Muskegon are the coldest high temperatures on record for any day in June. At Lansing the high was 49 degrees, second only to the 46 degree high on the previous day for being the coldest June day. 1950, Thunderstorms dropped one to three inches of rain across the region. Nearly an inch of rain fell in one hour in Grand Rapids, flooding streets and basements. Lansing had a storm total of 2.30 inches, which was a record for the day.

chescowxman · June 2

Today will be the 11th of the last 13 days with below normal temperatures. Sunny and dry through Saturday. We should finally see some warmer than average temperatures by the end of the week and into the weekend. Rain chances look to increase by Sunday.

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chescowxman · June 2

Of note here in the philly burbs of Chester County PA Spring of 2026 was the 14th warmest Spring since 1893 - conversely Winter 2025-26 was our 14th coldest! Our weather does have a way of balancing out! Below is our Spring Temperature trends since 1893....only some slight warming is shown.

Black Hole · June 3

I had some storms this morning and another round this evening, so 0.89" on the day. Could be a little more tomorrow, but more likely Thurs-Sat or so.

Black Hole · June 3

Ended up storming more this morning with around another inch for me, and potentially up to 3" in some areas not too far away.

Black Hole · June 3

Definitely looking wet here Thursday into early next week at times. Also interesting to see this growing mid range signal for a trough mid June.

MMike · June 3

We have had a wet spring in KC, been awhile since I've seen a wet spring. Closing in on 16.5 inches of rain in my part of KC. We actually had a cooler than average May also. Had a lot of flood damage in KC north with saturated grounds from the weekend rains and then 4 inches of rain Monday morning in about 1.5 hours. I have also had (3) tornado warnings with sirens this spring, 3 more than the last 10 years combined!!! No damage in my area though.

Now, the World Cup for soccer is coming to KC, going to be a traffic nightmare in June through early July.

chescowxman · June 3

Through May this has been our coldest start to a year since 2015. We should finally see some above normal temperatures starting tomorrow and peaking at around 90 degrees by Saturday. We then see some increasing chances of showers by Saturday night with temperatures cooling back to near normal levels by next Monday.

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tStacsh · June 3

I saw some clouds yesterday. But still mostly sunny. That's it, that's all i got.

Clinton · June 3

SE Nebraska and Iowa look to get some much needed rainfall over the next week.

Niko · June 3

Absolutely stunning today. Not a cloud to be found. Wall to wall sunshine w temps in the in the comfy zone low 80s. Gotta luv this weather. Lows tanite into the upper 40s and 50s in the warmer spots.

Niko · June 3

1 hour ago, Clinton said:

SE Nebraska and Iowa look to get some much needed rainfall over the next week.

Looks like this CF will make it here imby by Saturday w some much needed rainfall and hopefully some loud boomers.After that, its back to sunshine and comfortable temps. Sunday looks sunny and warm.

Niko · June 3

2 hours ago, tStacsh said:

I saw some clouds yesterday. But still mostly sunny. That's it, that's all i got.

I saw a cloud or 2 yesterday, but nothing today as far as the eye can see. It was that deep deep deep blue sky that you almost feel you can touch. Had that Greece blue sky almost.

Black Hole · June 4

Still looking pretty wet this weekend here. Next week will be hot though with 90s and dew points in the upper 70s.

westMJim · June 4

With clear skies and a calm wind the temperature dropped down to 54 here in my yard. At 7AM it is clear and 55. Today will be the 11^th day in a row of no rainfall, with the sunny skies it should be a warm day with highs in the mid to upper 80’s The low dew points will make it feel a little cooler than that. Friday should see the best chance of rain we have had is almost two weeks. Highs will be in the 80’s but it will be a little more humid and lows will thus stay in the 60’s. Next week looks to be very warm with highs in the mid to upper 80’s and a chance of maybe even a 90. Lows will be in the 60’s.

The official H/L yesterday at Grand Rapids was 82/48 with that gave the day a average temperature of 65 that means there were no cooling or heating degree days. So if a day has a average temperature of 67 there would be 2 cooling degree days and if the average was 63 there would be 2 heating degree days. There was once again no rainfall yesterday. For today the average H/L is 76/55 the record high of 93 was in 1898 and 1925 the coolest high of 56 was in 1945 the record low of 32 was also in 1945 that is the coldest low for June at Grand Rapids and the lowest temperature for any meteorological summer day. The warmest low of 72 was in 1925 and 1899. The most rainfall of 1.09” was in 1911. Last year the H/L was 78/60 and there was 0.24” of rainfall.

Some weather history for June 4^th 1988, A dozen cities in the eastern U.S. reported record low temp- eratures for the date, including Atlantic City NJ with a reading of 40 degrees. Fifteen cities in the north central U.S. reported record high temperatures for the date, including Glasgow MT and Havre MT with readings of 102 degrees. (The National Weather Summary) Here in Michigan 1925, An early June heat wave began and lasted through the 6th with record highs in the mid and upper 90s.

Hoosier · June 4

Some D1 added on the new update

Tom · June 4

There are some indications that Week 2 overall could be a lot more active and seasonal to BN for our Sub. Some happy farmers and peeps who don't need the Heat!

Week 2...

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Quite a nice wet signal...

Now, let's see if this can roll through the 4th of July weekend...

Week 3-4...overall "troughy" look for eastern 2/3's of the Nation...that PAC Jet signal northeast of Hawaii is muj bueno!

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I am intrigued by the Very Wet Signal out of the 4 corners into the Heartland and pretty much everyone in our Sub Forum...Let's Fire up that Monsoon!!!!