Beau Dodson's WeatherTalk Blog

July 18, 2015: Hot weather for Saturday and Sunday

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This forecast update covers far southern Illinois, far southeast Missouri, and far western Kentucky. See the coverage map on the right side of the blog.

Remember that weather evolves.  Check back frequently for updates, especially during active weather.

The forecast numbers below may vary a bit across the region.  These are the averages.

WEATHER RADAR PAGEClick here

We will have  10%-20% chances for isolated popup storms over the coming days.  Otherwise, mostly dry for a change.

The government weather service has issued some heat advisories and what not.  Just means it is going to be hot.  Use care, as always.

Friday night –  A few patches of clouds, otherwise mostly clear.  Warm and humid.  Small chance for a few thunderstorms, especially northern and northeastern counties.
Temperatures:  Lows in the 70’s
Winds:  South and southwest winds at 5-10 mph.
My confidence in this part of the forecast verifying is high
Should I cancel my outdoor plans?
 No
Is severe weather expected?  No
What is the chance for precipitation?  10% chance.
What impact is expected?   None, unless an isolated storm forms.  Then lightning and heavy rain.

 

Saturday  Mostly sunny to partly cloudy at times.  Hot and muggy.  Excessive heat index values.  Small chance for a popup thunderstorm.
Temperatures:  Highs well into the 90’s with heat index values above 100 degrees.
Winds:  
West and Southwest winds at 5-10 mph.  Gusts to 15 mph on area lakes.
My confidence in this part of the forecast verifying is high
Should I cancel my outdoor plans?  
No
Is severe weather expected?  No

What is the chance for precipitation?  10%-20%  chance

What impact is expected?   None, unless an isolated storm forms.  Then lightning and heavy rain.

 

Saturday night –  Mostly clear.  Warm.  Muggy.
Temperatures:  Lows in the 70’s
Winds:  Southwest winds at 5-10 mph.
My confidence in this part of the forecast verifying is high
Should I cancel my outdoor plans?

Is severe weather expected?  No
What is the chance for precipitation?  10%
What impact is expected? None, unless an isolated storm forms.  Then lightning and heavy rain.

 

Sunday  Partly to mostly sunny.  Hot and muggy.  Excessive heat.  Heat index values above 100 degrees.
Temperatures:  Highs well into the middle and upper 90’s.  Heat index values of  100 to 110 degrees
Winds:
 West and Southwest winds at 5-10 mph.  Gusts to 10-15 mph.
My confidence in this part of the forecast verifying is high
Should I cancel my outdoor plans?  
No
Is severe weather expected?  No

What is the chance for precipitation?  10%

What impact is expected?  None, unless an isolated storm forms.  Then lightning and heavy rain.

 

Sunday night –  Some increase in clouds.  A 30% chance for a thunderstorm.
Temperatures:  Lows in the 70’s
Winds:  Southwest winds at 5-10 mph.
My confidence in this part of the forecast verifying is medium
Should I cancel my outdoor plans?
No
Is severe weather expected?  No
What is the chance for precipitation?  30%
What impact is expected?  If storms do form the brief heavy rain and lightning.

 

Monday  Partly cloudy with a chance for some thunderstorms.
Temperatures:  Highs in the upper 80’s to around 90 degrees.  
Winds:
 West and Southwest winds at 5-10 mph.  Gusts to 10-15 mph.
My confidence in this part of the forecast verifying is medium
Should I cancel my outdoor plans?  
No
Is severe weather expected?  No

What is the chance for precipitation?  40%

What impact is expected?  Thunderstorms could produce gusty winds, lightning, and heavy downpours.

 

Below normal temperatures are possible Monday into Wednesday as a cold front approaches the region.  Then the heat may return.

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Sunrise and Sunset Times – Click Here

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Don’t forget to check out the Southern Illinois Weather Observatory web-site for weather maps, tower cams, scanner feeds, radars, and much more!  Click here

beausanalysis

An explanation of what is happening in the atmosphere over the coming days…

Highlights

1.  Saturday and Sunday will both bring hot and humid weather conditions.
2.  The next cold front is already on the map.  It will arrive Sunday night into Tuesday.

Saturday and Sunday will bring mostly dry and hot weather.  Only small thunderstorm chances in the region.   Any storms that do manage to form could produce heavy rain and lightning.

The big story of the weekend will be the heat and humidity.  Dew points will be quite high.  That means it will feel muggy outside.  Not the best weather for outdoor activities.

Overnight lows will only dip into the 70’s.  Warm.

Use care if you have to work outside.  Especially true for children and elderly people.  Also, don’t forget our outdoor pets.  Water bowls will need to be filled.

 

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Our next cold front will arrive on Sunday night into Tuesday.  The front will be accompanied by some thunderstorms.  See the extended forecast below.

Heat index value chart for Saturday and Sunday.  Images are from wright-weather.com

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Saturday

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Sunday

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This section of the blog is speculative forecast information.  Because it is past the range of what meteorologists can forecast accurately, it should be considered speculation.  Anything past day 5 is considered a long range forecast.

Highlights

1.  Looking ahead to next week
2.  Are we about to enter a long hot dry spell?  Some data is showing that.

After a mostly dry weekend (outside of slight thunderstorm chances in the heat of the day) we will have a cold front reenter the picture on Sunday night – Tuesday.

Some question marks as to the speed of this front.  Will it sag south of our region by Monday night or Tuesday?  Or, will it perhaps become stationary for a day or two.  Still some uncertainties on that subject.  Let’s keep an eye on it.

Sensible weather consequences of the front will be scattered showers and thunderstorms.  The air mass will be unstable.  I can’t rule out some strong thunderstorms along the front, as well.  Of course, with all of this moisture in the atmosphere, you can expect some locally heavy downpours where thunderstorms develop.

We may have to monitor for an MCS.  Mesoscale Convective System.  Large area of thunderstorms.  Perhaps Monday night into Tuesday morning.  If so then heavy rain would occur along its path.  Too soon to make a solid call on that, but monitoring.

Let’s keep an eye on the front and I will update moving forward.

It appears the ridge of high pressure will build back in towards the middle/end of next week.  If that happens then heat returns once again.  Highs into the 90’s with heat index values about 100.  The tug of war continues.

Friday through Sunday will bring above normal temperatures (this weekend)

Then perhaps normal to below normal again on Monday – Wednesday.

Then perhaps above normal temperatures again after that.

Let’s look at the ridge.

These are 500 mb maps from the GFS.  The big H is he heat ridge.  When it nudges into our region we heat up.  When it is suppressed southward then we cool down a bit and become stormy.

This is for this weekend

HOT HOT HOT

Images are from weatherbell.com

saturday

This is for next Tuesday and Wednesday (below image).  Notice how the ridge is further south?  A cold front will be near our region.  Thunderstorms typically move around the edge of the heat ridge.

wednesday

Then next weekend. Hot again?  Maybe.  This image below shows the high building back in.  The heat ridge.

nextweekend

Mixed signals on the models for the week after next.  Whether another trough builds back into the Ohio Valley with northwest flow (cooler than normal and wetter than normal) or we end up stuck under the ridge.  Questions, questions, questions.  The ridge means heat.  The trough means wet.

Let’s keep an eye on Dolores (out in the Pacific).  Where will this moisture go?

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Radars

WEATHER RADAR PAGEClick here

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I also set up a storm tracking page with additional links (use during active weather for quick reference)
Storm Tracking Tool Page

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rainfallforecast

How much precipitation should we expect over the next few days?

Rainfall forecast for Monday through Wednesday.  We will have to watch for heavier totals if a complex of storms does end up forming and tracking across our region.

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Wednesday through Friday of next week.  Perhaps a few scattered storms.

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Can we expect severe thunderstorms over the next 24 to 48 hours?  Remember that a severe thunderstorm is defined as a thunderstorm that produces 58 mph winds or higher, quarter size hail or larger, and/or a tornado.

Thunderstorms threat level is ZERO to ONE for Saturday.  Perhaps a 10% chance for a storm.  Otherwise, dry and pleasant weather.

Saturday into Sunday:  No severe weather anticipated.  Small chances for thunderstorms.

Sunday night into Monday-Tuesday:  Thunderstorms possible.

whatamiconcered

The heat index is the main concern for Saturday and Sunday. Heat index values of 100 to 105 (perhaps a bit hotter) will be common.  Use care, as always

Some thunderstorms may return to the forecast on Sunday night into at least Tuesday.  Lightning and brief heavy downpours will be the main concern.

 

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Here are the current river stage forecasts.   You can click your state and then the dot for your location.  It will bring up the full forecast and hydrograph.

Click Here For River Stage Forecasts…

Here are some current forecast hydrographs.  These will be updated each day with new information.

Smithland Lock and Dam

Paducah, Kentucky Forecast Stage

Cairo, Illinois

Cape Girardeau, Missouri

Current Temperatures Around The Local Area

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We have regional radars and local city radars – if a radar does not seem to be updating then try another one. Occasional browsers need their cache cleared. You may also try restarting your browser. That usually fixes the problem. Occasionally we do have a radar go down. That is why I have duplicates. Thus, if one fails then try another one.

If you have any problems then please send me an email beaudodson@usawx.com

WEATHER RADAR PAGEClick here

We also have a new national interactive radar – you can view that radar by clicking here.

Local interactive city radars include St Louis, Mt Vernon, Evansville, Poplar Bluff, Cape Girardeau, Marion, Paducah, Hopkinsville, Memphis, Nashville, Dyersburg, and all of eastern Kentucky – these are interactive radars. Local city radars – click here

NOTE:  Occasionally you will see ground clutter on the radar (these are false echoes).  Normally they show up close to the radar sites – including Paducah.

http://www.weatherobservatory.com/weather-radar.htm

Regional Radar – Click on radar to take you our full radar page.

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Regional Radar

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Live Lightning Data – zoom and pan:  Click here
Live Lightning Data with sound (click the sound button on the left side of the page): Click here

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I also set up a storm tracking page with additional links (use during active weather for quick reference)
Storm Tracking Tool Page

clickherewatches

Current WARNINGS (a warning means take action now). Click on your county to drill down to the latest warning information. Keep in mind that there can be a 2-3 minute delay in the updated warning information.

I strongly encourage you to use a NOAA Weather Radio or warning cell phone app for the most up to date warning information. Nothing is faster than a NOAA weather radio.

Color shaded counties are under some type of watch, warning, advisory, or special weather statement.  Click your county to view the latest information.

Missouri Warnings

Illinois Warnings

Kentucky Warnings

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Here is the official 6-10 day and 8-14 day temperature and precipitation outlook.  Check the date stamp at the top of each image (so you understand the time frame).

The forecast maps below are issued by the Weather Prediction Center (NOAA).

The latest 8-14 day temperature and precipitation outlook.  Note the dates are at the top of the image.  These maps DO NOT tell you how high or low temperatures or precipitation will be.  They simply give you the probability as to whether temperatures or precipitation will be above or below normal.

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Who do you trust for your weather information and who holds them accountable?

I have studied weather in our region since the late 1970’s.  I have 37 years of experience in observing our regions weather patterns.  My degree is in Broadcast Meteorology from Mississippi State University and an Associate of Science (AS).  I am currently working on my Bachelor’s Degree in Geoscience.  Just need to finish two Spanish classes!

I am a member of the American Meteorological Society.  I am a NOAA Weather-Ready Nation Ambassador.  And, I am the Meteorologist for McCracken County Emergency Management.

I own and operate the Southern Illinois Weather Observatory.

There is a lot of noise on the internet.  A lot of weather maps are posted without explanation.  Over time you should learn who to trust for your weather information.

My forecast philosophy is simple and straight forward.

  • Communicate in simple terms
  • To be as accurate as possible within a reasonable time frame before an event
  • Interact with you on Twitter, Facebook, and the blog
  • Minimize the “hype” that you might see on television or through other weather sources
  • Push you towards utilizing wall-to-wall LOCAL TV coverage during severe weather events

I am a recipient of the Mark Trail Award, WPSD Six Who Make A Difference Award, Kentucky Colonel, and the Caesar J. Fiamma” Award from the American Red Cross.  In 2009 I was presented with the Kentucky Office of Highway Safety Award.  I was recognized by the Kentucky House of Representatives for my service to the State of Kentucky leading up to several winter storms and severe weather outbreaks.

If you click on the image below you can read the Kentucky House of Representatives Resolution.

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I am also President of the Shadow Angel Foundation which serves portions of western Kentucky and southern Illinois.

Many of my graphics are from www.weatherbell.com – a great resource for weather data, model data, and more

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awaremail

You can sign up for my AWARE email by clicking here I typically send out AWARE emails before severe weather, winter storms, or other active weather situations. I do not email watches or warnings. The emails are a basic “heads up” concerning incoming weather conditions.

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