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by wxteam4 from Kansas City, MO.

Last Post 5 hours Ago


All quiet in the area today as expected...lots of sun and once again low dewpoints...got to say it's pretty unusual for late June to have 3-4 straight days with dewpoints in the 50s...that's been the case lately but things are going to be changing as a real dose of summer heat heats the area...nothing extreme but our days of tracking when the 1st 90 degree day may be ending...as soon as WED...if not by THU...Evan Bookbinder from EAX had a great nugget of information from the AM discussion...here it is...

AN INTERESTING TIDBIT. THE FACT THAT WE HAVE NOT YET HIT 90 DEGREES
IN KANSAS CITY IS NOT AS RARE AS ONE MIGHT EXPECT. IN FACT...SINCE
RECORDS BEGAN IN 1888...THERE HAVE BEEN 11 OCCURRENCES WHERE 90
DEGREES WAS NOT REACHED UNTIL AFTER JUNE 23RD...MOST RECENTLY IN
2004 WHERE 90 DEGREES WAS NOT REACHED UNTIL JULY 11TH! MUCH LIKE
THIS YEAR...UNUSUALLY WET WEATHER KEPT THE MERCURY DOWN INTO THE
EARLY SUMMER.

So lets talk about tonight's situation...we'll stay quiet through midnight or so...but after that all bets are off as a rapid intensification of a low level jet...poking winds of close to 30-40 kts will be poking into NE KS and NW MO...this, like last night to the west, should result in rapid t/storm development...there is also a weak feature showing up in the visible pictures in western KS that may be a weak vort max that could enhance the storm chances later tonight...as they for the storms should move ESE to Eastwards...so the area that they form will be critical in determining how much activity we get here...keep in mind that the storms last night dumped a ton of rainfall in some areas...2-3" so there is the possibility of locally heavy rainfall later tonight into tomorrow early AM...

Then there is the issue of tomorrow PM...as a warm front/outflow may be straddling the I-70 corridor and lifting northwards...again tomorrow PM forecast is VERY conditional on the status of instability/sunshine/boundaries etc...but there is the possibility of severe storms and maybe even a couple of tornados somewhere in the area...reason being while the speed shear with height isn't overly large...IF the warm front is close...that means there will be enhanced directional shear...so that IF any storms fire up in the later PM hours...and they encounter the boundary the may rotate a bit more and create a spin-up...DH and I were talking about these chances today and the WRF is being aggressive with the helicity forecast from the 12Z data...so it's something that needs to be watched...I've felt for the last few weeks that we may get one more busy severe weather hit this month...we'll see if tomorrow pans out or not...again part of the issue is dependent on events in the early AM hours...

After this...warm humid weather expected for the rest of the work week before another nice front pushes in later FRI...with storm chances and a brief hit of cooler/drier air to kick off the weekend with dewpoints perhaps back into the 50s briefly...before the heat and humidity return later SUN and the week of the 30th!

I'll keep an eye on things for you tonight!

I'll leave you with the last words from Al the hippy, dippy weatherman who on his last weathercast said the immortal words..."the weather will continue to change for a long long time..." RIP George Carlin

Joe


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Member Comments Total Comments: 5
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musicmom
Jun 23, 2008 | 4:23 PM

I saw a billboard today, that I'm sure has been up for some time, from a heating and cooling company that said if KC reached 100 degrees on Father's Day, one could get a free air conditioner. Have we ever reached 100 by Father's Day?

wxteam4 read my blog view my photos
Jun 23, 2008 | 4:36 PM

musicmon:

Yes...quite a few times...here is a link for all the record highs...well before F.D....

http://media.myfoxkc.com/weather/almanac/junrcds.htmlr>
Joe

wxteam4 read my blog view my photos
Jun 23, 2008 | 9:30 PM

QUICK UPDATE...

The 00Z WRF which has been nails on for the last 2 nights with these developing t/storms...keeps the rain to the north of the area thru tomorrow AM...also should mention that it develops t/storms again tomorrow afternoon in the area as well...helicity forecasts are considerably weaker than the AM run...the new RUC also has the precip in NE KS and NW MO...probably near 36 highway...it would be moving towards the E or maybe just S of East...this would be for tomorrow AM...may make some tweaks to the forecast later this evening...also wondering about whether ir not I'm underestimating the temperature forecast tomorrow...storms in the region will dictate that situation...

Joe

wxteam4 read my blog view my photos
Jun 23, 2008 | 9:37 PM

Also today was "technically" the 11th straight day with temperatures below average I think...granted most of the days were 1-3 degrees below average...but it is what it is...

jl

R-Dub
Jun 24, 2008 | 9:50 AM

Hi Joe and Chris. This comment is for the research results Chris posted earlier. This is intended to be constructive criticism from a professional scientist, so...I think you have dismissed your hypothesis much too easily without doing any real analysis of the data.

It's not surprising that the data was noisy and didn't fit neatly into a pattern. Environmental data never does. That's why you have to use statistical techniques to help you sort through the data. In this case, the data set you are looking at seems to be a perfect fit for a 3x3 contingency test, if you divide the precip and temperature data into three groups (above average, near average, and below average). If you do this, you should set the definitions of the groups so that we expect them all to be equal frequency (33%). Or you could do a 2x2 contingency test and only divide the data into 2 groups, above and below average.

Your hypothesis is: the two factors (spring precipitation and summer temperature) are dependent on each other. The null hypothesis is that the two factors are independent. Using a chi-squared test, you can determine if the relationship between the two factors is statistically significant (which is your hypothesis). It may turn out that your initial post was correct, and there really is no relationship. But you don't really know until you test it.

Excel can do this using the CHITEST function. See the Help to explain how to set it up. You can also find lots of references on the internet for contingency tables. Some even have calculators set up.

RD

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wxteam4

Mike Thompson, Don Harman, Karli Ritter and Joe Lauria make up the 4 Warn Weather Team at FOX 4. We've been blogging now for two years, as a matter of fact we were the first ever weather blog serving this region, and we're excited to continue to be able to get feedback from our viewers right here on our blog. Look here for extra information, trivia, and severe weather updates.

Member Since: 9/1/2006