Updated at 11:30 AM: A weak cold front is now moving across the local area this afternoon. A band of thick stratocumulus clouds is associated with this front and this will prevent the heat from building in today. I know that if you watched our forecasts yesterday and this morning, then you were aware that the excessive heat warning shouldn't have been issued for today, and the orange alert shouldn't have gone into effect. This weak front was somehow ignored by most forecasts So, don't be surprised if it is only in the middle 80s to near 90 today, especially north and east. The heat will build in, as expected over the weekend into Monday! The dewpoints will be extreme today through Saturday. We may even see an 80 degree dewpoint on Saturday.
Previous entry below:
Good morning bloggers,
It is very hard to believe, but it is August 1st. So, today is July statistics day.
July stats at KCI airport:
- Total rainfall: 6.63" (2.21" above average)
- Average Temperature: 77.1 (1.4 degrees below average)
- Highest Temperature: 96 (21st)
- Lowest Temperature: 58 (1st and 13th)
- There were seven 90 degree days
It has been a wet summer in most areas. Here are some rainfall totals for the past two months:
June & July rainfall:
- Kirksville airport: 24.97" (11.04" in June, 13.93" in July)
- Johnson County Executive airport: 17.75" (8.52" in June, 9.23" in July)
- Lee's Summit airport: 15.44" (8.05" in June, 7.39" in July)
- Chillicothe airport: 14.52" (7.79" in June, 6.73" in July)
- KCI airport: 10.94" (4.31" in June, 6.63" in July)
- St. Joseph airport: 10.40" (6.54" in June, 3.86" in July)
There is a weak cold front approaching us right now. The air quality is being forecast to go into an orange alert today, but if this front gets through us by 4 PM, as the RUC is showing below, then the air quality won't be that bad. It will be close. Look below at the forecast by the RUC for 4 PM today:

This very weak cold front will stall south and west of Kansas City tonight and then drift back to the east and wash out on Saturday. This is why we have been a bit cooler than every other forecast for today and Saturday, and we have a slight chance of thunderstorms in the forecast for Saturday morning. A few cumulus build-ups are likely early tomorrow morning with some isolated thunderstorms possible. After the front moves back through and washes out it will finally get very hot. Sunday and Monday may have temperatures close to 100 degree with the heat index likely going over 110. But, this heat should abruptly come to an end by Tuesday or Wednesday. Look below at the GFS 500 mb forecast on Monday night. The models have been very consistent for the past week on these developments:

The jet stream will dip south into the northern plains, and the system tracking across southern Canada is rather strong. This will help drag a cold front across us, possibly as early as Tuesday. We may drop Tuesday's high into the 80s depending on how the data looks this morning. The GFS is also modeling a tropical wave in the western Gulf of Mexico by Monday night as well. Looking at the satellite movies, I don't see any evidence of a complex of thunderstorms in the Gulf of Mexico yet, but it will be interesting to follow over the weekend.

In summary, it appears that the Excessive Heat Warning should have been just a heat advisory, and the orange alert may not verify, but it will get hot Sunday and Monday. I can see these two days having the possible Ozone alerts. And, the heat will likely end abruptly by mid next week. Have a fantastic weekend. We will be tracking these developments and more today and over the weekend on NBC Action News. We will be debuting our brand new Weather Center and News Set one week from tonight. I hope you will be watching as we look forward to your reveiws.
Gary