Beau Dodson's WeatherTalk Blog

March 5, 2016: Heavy rain event next week.

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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.

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Weather Radars
WEATHER RADAR PAGEClick here 

Scroll down for a longer morning update:

I am starting a blog update just for the flood event (I might start doing this for events).  Link.

Friday Night –  Partly cloudy and cool.
Temperatures:  Lows in the 34-38 degree range.
Winds:  Winds south at 5-10 mph.
What is the chance for precipitation
? 0%
Coverage of precipitation?  None

My confidence in this part of the forecast verifying is  High
Should I be concerned about snow or ice?  No
Should I cancel my outdoor plans
No
Is severe weather expected?  No
What impact is expected?  None

 

Saturday –  Partly cloudy.  More clouds over NW Kentucky into the Pennyrile area.  A few showers can’t be ruled out.
Temperatures:  High temperatures from 58-64  degrees.
Winds:   Southwest/west winds at 5-10 mph.  Variable winds in the afternoon (direction).

What is the chance for precipitation? 20% over the eastern counties
Coverage of precipitation? 
Isolated or spotty.  Eastern counties.  That includes NW Kentucky into the Pennyrile area.

My confidence in this part of the forecast verifying is High
Should I be concerned about snow or ice?  No

Should I cancel my outdoor plansNo
Is severe weather expectedNone.
What impact is expected?  None

 

Saturday Night –  A few evening clouds. And showers over the eastern counties of the region should be ending.  Then, becoming mostly clear and cold.
Temperatures:  Lows in the 28-34 degree range.
Winds:  Winds north/northwest at 5-10 mph.
What is the chance for precipitation
? 10%
Coverage of precipitation?  None

My confidence in this part of the forecast verifying is  High
Should I be concerned about snow or ice?  No
Should I cancel my outdoor plans
No
Is severe weather expected?  No
What impact is expected?  None

 

Sunday –  A few clouds, but quite a bit of sun.  Mild.
Temperatures:  High temperatures from 58-64  degrees.
Winds:   East and southeast winds at 6-12 mph.

What is the chance for precipitation? 0%
Coverage of precipitation? 
None

My confidence in this part of the forecast verifying is High
Should I be concerned about snow or ice?  No

Should I cancel my outdoor plansNo
Is severe weather expectedNo
What impact is expected?  None

 

Sunday Night –  Cloudy.  Not as cold.
Temperatures:  Lows in the 44-48 degree range.
Winds:  Winds south at 6-12 mph.
What is the chance for precipitation
? 10%
Coverage of precipitation?  None to isolated

My confidence in this part of the forecast verifying is  High
Should I be concerned about snow or ice?  No
Should I cancel my outdoor plans
No
Is severe weather expected?  No
What impact is expected?  None

 

Monday –  Mix of sun and clouds.  Mild.  Above normal temperatures.
Temperatures:  High temperatures from 64-68  degrees.
Winds:   South winds at 8-16 mph.  Gusts to 20 mph.

What is the chance for precipitation? 10%
Coverage of precipitation? 
None to isolated

My confidence in this part of the forecast verifying is Medium
Should I be concerned about snow or ice?  No

Should I cancel my outdoor plansNo
Is severe weather expectedNo
What impact is expected?  Maybe a few showers.  Wet roadways.

 

Monday Night – Cloudy.  A few showers possible. 
Temperatures:  Low temperatures well above normal in the 54-58 degree range.
Winds:  South at 8-16 mph.  Gusty.
What is the chance for precipitation
?  40%
Coverage of precipitation?  Scattered

My confidence in this part of the forecast verifying is Medium
Should I be concerned about snow or ice?  No
Should I cancel my outdoor plans?  Maybe some showers

Is severe weather expected?  No
What impact is expected?  Maybe some wet roadways.

 

Tuesday –  Showers and some thunderstorms.  Mild.
Temperatures:  High temperatures  65-70 degrees.
Winds:  South at 10-20 mph.

What is the chance for precipitation?  40%-60%
Coverage of precipitation? 
Becoming widespread

My confidence in this part of the forecast verifying is Medium
Should I be concerned about snow or ice?  No

Should I cancel my outdoor plans? Some rain possible
Is severe weather expected? Not at this time
What impact is expected?  Wet roadways.  Lightning possible.

 

Tuesday Night –  Showers and thunderstorms likely.
Temperatures:  Lows in the  55-60 degree range
Winds:  South at 10-20 mph.
What is the chance for precipitation
?  70%
Coverage of precipitation? Widespread

My confidence in this part of the forecast verifying is  High
Should I be concerned about snow or ice?  No
Should I cancel my outdoor plans
Rain likely to be an issue
Is severe weather expected?  Not at this time
What impact is expected?  Wet roadways.  Lightning possible.

 

Wednesday –  Showers and thunderstorms.  Heavy rain possible.
Temperatures:  High temperatures  64-68 degrees.
Winds:   South at 10-20 mph.

What is the chance for precipitation?  80%
Coverage of precipitation? 
Widespread
My confidence in this part of the forecast verifying iMedium
Should I be concerned about snow or ice?  No

Should I cancel my outdoor plansRain could be an issue.  Have a plan B
Is severe weather expectedNot at this time
What impact is expected?  Heavy rain.  Lightning possible.  Some flooding can’t be ruled out.  Monitor updates.

 

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beausanalysis

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

Saturday morning update:

Welcome to the weekend!  We have some clouds this morning, especially over the eastern half of the region.  Some light showers and sprinkles earlier this morning are pushing off to the east/southeast.

Clouds will take the longest to clear over our eastern counties.  Pennyrile area of western Kentucky.

Dry weather is expected the rest of today into Sunday.

Gusty winds arrive on Monday.  30-40 mph winds over southeast Missouri and southern Illinois.  20-35 mph winds elsewhere.

Heavy rain event next week?

Confidence is medium to high that a heavy rain event will occur Tuesday into Thursday.

Widespread 1.5-3″ rainfall totals.  And, bands of higher rainfall totals likely somewhere in the region.

Severe weather risk appears low.

Flooding is the main concern.  Sharp rises on rivers, streams, creeks, overland flooding possible, and perhaps flash flooding.

Least confidence in flash flooding.  This will depend on thunderstorm activity.  Thunderstorms would produce heavier rain totals in a short amount of time.

Location, location, location.  That is the big question for the big totals.

This system is still three days out.  That means adjustments in the forecast are possible.

I continue to monitor trends in the guidance.  Last night I told you that at this point the heavy rain event appears almost certain for parts of the region.

Much of the guidance has been centering the heaviest rain totals over Missouri and Illinois.  The overnight data showed that, as well.

I have some updated rainfall total maps below.

I have noted some northwest trend over the last 24 hours.  Meaning, the heaviest rain band pushing a bit further to the west/northwest.  Two data sets on Friday made an attempt to shift slightly north and west.  Then the guidance brought it back southeast in updated runs.  A bit of a back and forth.

Data has attempted to show this from time to time.  I believe this is the trend.  The trend is north and west.  Today will be telling.  If all of the guidance continues a bit of a northwest trend that they may be catching on to something.

The good news is that perhaps that would spare parts of our region the 4″-8″ rain band.  The bad news is that this would place the rain further north and west.  That would mean more water flowing down the Mississippi River.

This isn’t a case of will it or won’t it rain.  This is a case of how much will it rain.

I am forecasting widespread 1.5-3″ of rain for the entire region.  And, some bands of much heavier totals likely.  Odds appear to favor the heaviest bands being somewhere in Missouri and Illinois.  Whether over or north and west of my forecast counties remains a question.  I will post a graphic below of the area I am most concerned about (for the time being, at least).

Data has been very consistent in painting widespread rain from Tuesday into Thursday.  Some thunderstorms are also possible.  Severe weather threat appears low.  Main concern will be flooding.

Rivers are already high.  We do not need this rain.

The guidance indicates an active few weeks ahead of us.

I will post some updated maps below.

This is my first forecast thoughts on where the heaviest rain may fall.  The red boxed area.

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Below is the GFS guidance.  The heaviest band has been shifting around by a few counties from run to run.  We will see how new data plays out today.

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And, here is the latest WPC/NOAA forecast for rainfall totals.  This has shifted a bit west and northwest, as well

hpc_total_precip_mc_28 (2)

8 PM Update

March 4, 2016
This forecast update includes southeast Missouri, southern Illinois, western Kentucky and northwest Tennessee.
Time period of concern:  Tuesday through Thursday.  March 8th through 10th.
Concern:  Heavy rainfall.  Flash flooding.  River/stream flooding.  Overland flooding.  Flooded roadways in some areas.
Confidence in the forecast:  Medium to high confidence that locally heavy rain will occur next week.
Details:  Heavy rain event likely next week.
This event is still four days out. The forecast will likely evolve over time. Weather is not static. Weather evolves. The forecast will evolve as confidence grows.
It takes time to prepare for an event like this. Typically I like to ramp up and not down. As you know, that is how I treat winter storms. Ramp up and not down. Meaning don’t go big days in advance. Same with severe weather.
This is a potential flood event I want to make sure everyone is prepared and aware.  It takes a bit more time to prepare for a flood event.
Since February 28th I have been monitoring for a potentially significant rain event next week. I first mentioned it on the WeatherTalk blog. Then I sent out an AWARE email and have been utilizing the texting service to keep everyone updated.  This is the second AWARE email concerning the event.
With each passing day the guidance has been pointing towards an flood event. And, today’s data has not changed that thinking.
I am concerned about major rises on both the Mississippi and Ohio Rivers. And, smaller rivers and streams.  Overland flooding is also possible.  Areas that normally have problems when large rain events occur will likely have problems.
Periods of rain will begin on Tuesday and Tuesday night. The rain will spread into our region from the southwest. Rain, heavy at times, will continue into Wednesday and Thursday.
If everything unfolds as expected then a widespread 1.5″ to 3.5″ rainfall event appears likely. And, if everything unfolds as expected, there could be a band of 4″-8″ of rain somewhere in the region. Perhaps higher amounts in isolated areas.
We can handle an inch or two of rain.  We can not handle four, five, six, seven, and eight inches of rain.  And, that is the concern.
The region of concern includes Missouri, Illinois, Indiana, Kentucky, Arkansas, and Tennessee. Where these heaviest bands of rain will occur is still a question mark.
I am amazed at how many days the guidance has been showing nearly the same forecast solution. Normally models do not show the same solution over and over again. Normally being the key word. The exception is for significant events.
Historically I have always told people to look for the following when forecasting a significant weather event
1. Persistence in the guidance a week or more in advance. Meaning, the data shows the same thing over and over again.
2. Agreement in the guidance packages. Meaning, different models start showing the same forecast idea over and over again.
Examples of this were the Superstorm of 1993, the 2009 ice storm, the 2011 flood and super outbreak of tornadoes across the southern United States, and the December 2015 Missouri Valley flood event.
Those are a few examples that match my criteria for forecasting a large/significant event. The guidance and pattern, on the above mentioned events, showed itself well in advance. A week or more in advance.
Hopefully the guidance is wrong. Hopefully the rainfall totals will be quite a bit less than what is being shown. And, of course, this is a possibility. We are still four days away from the event.
The problem is that it takes time to prepare for a flood event. And, forecasters have to keep this in mind.
Here are some impacts that may occur from this event. And, here are some tips from the NWS (and others) as to who should be paying attention.
Emergency management officials.  First responders.  Rapid water rescue teams.  State and government officials.
Those who manage water resources, such as ponds, lakes, and dams.
The Transportation cabinet. Plan and position resources for any potential road restrictions caused by flooding.
For home and land owners, this weekend will provide an opportunity to clear debris that may be blocking drainage ditches and structures on your property. This will help in getting water to move away from your property more efficiently.
If you live near the Mississippi and Ohio Rivers and you normally experience flooding from medium size flood events then you may have concerns. And, areas that experience flooding during larger events may also have concerns.
There is the potential for significant rises on our local rivers. The Ohio River is already out of its banks.  Additional heavy rain won’t help the situation.
I will be fine tuning the forecast over the coming days. As we draw closer to the event I will be able to zero in on where the heaviest bands of rain will occur.
I will likely send out another AWARE email on Sunday/Monday.
One thing to consider is that this rain event may cover a very large chunk of real estate. Much larger than a normal rain event. This means that water basins will have to handle a large amount of water.

If you have concerns about flooding then closely monitor updates forecasts. This event is still four days out. And, changes in the forecast are possible.

Previous update:

Highlights

1.  Decent weekend ahead of us
2.  All eyes on next week.  Heavy rain event likely.

Today is a travel day for me.  Couple of items to discuss.

A weak system will pass to our northeast on Saturday.  This could trigger a few showers from southeast Illinois into the Pennyrile area of western Kentucky  Cloudier east vs west.

The big weather story continues to be the potential for a heavy rain event next week.  It is a bit early to pin down just how much rain will fall in each county.

At this time, I am expecting all of my forecast counties to pick up 1.5 to 3 inches of rain.  Guidance shows a lot more rain falling than 1.5 to 3 inches.  But, this is still days away.  And, guidance can shift.

It is likely that someone in the Missouri, Ohio, and Tennessee Valleys will pick up more than six inches of rain from this event.  Flooding is a concern.

I am not sure where the heaviest band will occur.  There has been some shift northward over the past 24 hours on the GFS model.  Shifting the heaviest band into Missouri and parts of Illinois.

Other guidance places the heaviest band right on top of us.

Continue to monitor updates concerning this potential flood event.  The forecast will be fine tuned over the coming days. Flash flood or flood watches will likely be issued for parts of the region next week.

I will post more information over the coming days.

The severe weather threat is not zero, but does not look great.  Heavy rain may be the main concern from next weeks event.

 

Weekend Forecast:

Expect dry weather on Friday into Sunday.

Camping forecast.  Gusty winds on Saturday.  Maybe a few clouds from time to time.

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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.

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Friday – The thunderstorm thread level will be zero
Saturday – The thunderstorm thread level will be zero
Sunday – The thunderstorm thread level will be zero

 

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No major changes in this update.
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whatamiconcered

Monitoring next week for the potential for heavy rain.

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No.  Several days of calm weather.

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

No significant rain through Sunday.  Heavy rain likely next week.

This is a preliminary look at how much rain could fall next Tuesday and Wednesday/Thursday.  Showers may arrive as early as Sunday night and Monday. Heavier rain Tuesday and Wednesday.

What to take from this graphic?

Confidence level is medium that a heavy rain event will occur next week.

NOAA has released this graphic.  Keep in mind, there will likely be shifts in where the heaviest rain will fall.  This is a very early forecast.  Big totals.

 hpc_total_precip_mc_28

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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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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…

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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.

My resume includes:

Member of the American Meteorological Society.

NOAA Weather-Ready Nation Ambassador. 

Meteorologist for McCracken County Emergency Management.  I served from 2005 through 2015.

I own and operate the Southern Illinois Weather Observatory.

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. 

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.

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

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

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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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