Monday, February 03, 2020

Common Weather Misconceptions, Myths and Analogies



Many wonder why I write so much about the psychology of weather. If you read the comments on most of my posts over the years you'll see why. Many will believe what they want to believe. They use social media as a conduit to say whatever impulsive thoughts they want without recourse science be damned. Bias and perception become the ultimate reality.
I use social media and my blog--since 2005--to show why weather events occur the way they do. I post statistics, records and graphical charts about past weather to show some perspective. I think I'm successful most times. Unfortunately a significantly large percentage of the social media audience are not receptive much to my dismay.

So rather than use technical, long winded science to explain the why we do what we do, I'm taking a straight forward approach (with some dry humor and sarcasm) to drive home some points:

*******************

1) It WILL snow at some point between February and early April. It always does.

2) The warm weather in winter plays with our minds.  Our weather perceptions (cognitive biases) are very strong.  We are not immune.  We are all human.  Recognition of these preconceived notions is the first step in an objective understanding the weather and the science that governs it. Public perception is very powerful.

3)  We humans hate forecast uncertainty. Heck, we all hate uncertainty of any kind really. Here's why LINK

4) Contrary to what you might believe, weather forecasts are more accurate than they were 15 years ago.  According to this study, "the accuracy of the 8-10 day forecast today are similar to a 5-7 day forecast 15 years ago. Hurricane accuracy is greatly improved since Hurricane Katrina LINK.

4a) Many people say that TV weather forecasts were better/more local/more accurate in the 1970s or 1980s. Totally disagree. Look one up on Youtube. Those forecasts look pretty antiquated.

4) Our morning show here at FOX 8 in Cleveland is 6 hours (4am to 10am). I have 41 weather segments, headlines and teases. I will repeat myself. The weather forecast between 4 and 10am can change as the conditions change. Forecasts are not frozen in time during each weather segment.  The weather doesn't stop for television.

5) The decision to break into a popular TV show or sporting event with a weather update is NOT an impulsive one. Stations have different philosophies on when to break into programming. I can't speak for the others. However, my station WJW-FOX 8 only breaks during a tornado warning or a significant winter weather event (widespread, blizzard-like snow which doesn't happen every year). We treat those weather events very seriously especially when people's lives are threatened.

6) Most television weather maps typically show the weather in two dimensions which by their nature don't paint a complete picture. Imagine the atmosphere (especially during sleet, freezing rain events) like layers of a wedding cake.  Each layer of icing represents the different layers of air at different temperatures with different types of precipitation.

Note: The wedding cake analogy is mine and mine alone. I invented it :)

8)  In reality, the atmosphere is a three dimensional, ever changing fluid. Complex equations are used in describing its behavior. Many television meteorologists took classes in thermodynamics, cloud physics, years of calculus and differential equations. Its not as easy as looking out the window https://journals.ametsoc.org/doi/10.1175/MWR-D-17-0257.1

7) Moon or sun halos are not uncommon. They are beautiful sights caused by the bending, splitting and reflecting of sunlight through ice crystal clouds.  Double rainbows are super common. We have hundreds of photos from viewers. Call me when you see a tertiary rainbow!

8) I grade my long range outlooks. (I've added the extreme temperatures category) Here is an example from the winter  of 2018-19.



8) I'm not a fan of phone weather apps that promise super-local weather forecasts for your backyard every 15 minutes. They are like unicorns.  They truly don't exist as promised.  Most phone app forecasts are created from computer generated model data that's approximated based on your location via your phone's GPS.  I will always trust a human generated forecast app (via NWS or your local tv station like FOX 8) every day of the week. Also, a radar app is a must for everyone.

9) Jet contrails are not chem-trails.  They, like unicorns, don't exist.  I don't like conspiracy theories.

10) I have no control of weather, news or school closing promos that run many times per hour. The promotions department is on the first floor.

11) Yes, pre-Christmas warmth is unusual but its happened before. Remember 1982?  Remember 2019?


12) Simply because the weather has been warm or cold in your area, wet or dry doesn't confirm or deny climate change. It's more complicated than that. It never fails. People on social media will invariably post evidence--usually what they observe in their backyard over time--confirming their preconceived notions.  See number 2 above for the reasons why.  There are many reputable sites and sources on Climate Change.

14) I consider myself an operational meteorologist who happens to be on television. I constantly read research papers, articles on new forecasting techniques and other weather posts from other meteorologists so that I can incorporate these new developments/forecasting techniques into my on-air segments. The science has come a long way.

13) We forget that the 2000s was the snowiest decade in northern Ohio NOT the 1970s



14) The term Polar Vortex is not new. Yes, it's real (LINK)

15) "Panhandle Hooks" in winter typically feature wetter snows from the southwest. Please don't call it a "Panhandle Hooker".

16) Contrary to what we believe, you cannot use one or two days or even a weeks worth of weather as a predictor of the season ahead. For example, a warm or cold December is not an indicator of the spring or summer ahead. A super wet spring/early summer (2019 for example) doesn't mean the rest of the summer will be wet/little heat. Basically the drivers of winter or any season aren't necessarily the drivers of next season. It's not an apples to apples comparison. I wish it was. (Remember December 2014 was warmer than normal.  Then the bottom fell out: January through February in Cleveland was the 6th coldest on record, coldest since 1978)

17) Seasonal forecasts are like grandma's casserole. There are many ingredients. You change one ingredient and, just like the taste of grandma's casserole, the outlook will be totally different.

18) The Lake Erie water temperature is taken at a depth of 30 feet near the water intake a few miles offshore. There are also satellite measurements taken each day which are available FREE online.

19) There is a TON of science behind seasonal outlooks. The Farmers' Almanac is not science (although I enjoy reading it).  Weather consulting companies issue seasonal outlooks tailored for their clients. This is a multi-million dollar enterprise and it continues to grow significantly.

20) Many readers will ignore everything I typed here and replace it with their own conclusions regardless of their validity.

I reserve the right to add to this list.

I hope this helps :)




Monday, January 20, 2020

COMPLETE Lake Erie Ice Cover History Since 1972

Here is the Lake Erie ice coverage percentage for EACH DAY since the start of the winter of 1972-73 color coded.

0% to 0.09% Grey
0.1% to 0.99% Light Blue
1% to 10% Darker Blue
10.1% to 25% Brighter Blue
25.1% to 50% Light Purple
50.1% o 75% Bright Purple
75.1% to 99% White

I posted each month separately because the original image was too big...too long.

Top row is 1972-73. Bottom row is 2018-19

Per Great Lakes Environmental Research Laboratory (GLERL) "From 1973 through 1988, the source was the Canadian Ice Service. Beginning with 1989, the source was the U.S. National Ice Center, (NIC). Data from both Canadian and U.S. sources is combined in NIC's daily products."

NOVEMBER

DECEMBER
JANUARY

FEBRUARY

MARCH

APRIL

MAY









Thursday, July 25, 2019

What Caused the Lake Erie Water Temperature Changes Recently?

A huge upwelling event occurred along the eastern shoreline of Lake Michigan earlier this week. Water temperatures dropped from the lower 70s to the upper 40s in under 24 hours! Why did this happen? The Grand Rapids, Michigan National Weather Service office has a great graphic that describes what upwelling is.



Can this occur along the Lake Erie shoreline here in Ohio? Absolutely. In fact, some significant temperature changes occurred about 24 hours after the Lake Michigan event just offshore near Cleveland.

I created a basic animation showing how the water temperatures fluctuated earlier this week especially as depths between 20 and 40 feet. One short-lived drop of around 10 degrees at 23 feet, steadier drops at 30 feet with a spike of more than 20 degrees at 30 feet. At 40 feet, water temps rose from 52 to 75 degrees in under 24 hours. Below that depth, water temperatures have been consistently near 50-55 degrees.


Lake Erie water temperature colorized depth map shows the variation under the surface



A sustained north wind developed Tuesday and Wednesday...




Wave heights had a big spike as the north wind took over.



North wind and higher wave heights match up with the drop in temperature.




Thankfully the bulk of the colder water didn't make it all the way to the surface. Temperatures went from 79 to 73 degrees at this buoy. Temperatures stabilized over the next 24 hours

Bottom line is never under estimate the influence the north wind has on Lake Erie conditions. The higher waves are the changes we see on the surface. The rough conditions under the surface either through strong rip currents or temperatures drops to levels that can cause hypothermia are not as obvious and lesser known.



Tuesday, July 23, 2019

Northern Ohio Heat Index History

After the recent extreme heat and humidity across the country where more than 85% of the 48 contiguous state had temperatures above 90 degrees with heat indices above 100 across 30 states, many have asked how this heat wave has compared to past heat waves here in northern Ohio.


HIGHEST Heat Index levels for every hour in Cleveland since 1948 (Hopkins Airport)


Highest Dew Point for each hour - Cleveland (Hopkins Airport)



For comparison, the LOWEST wind chill (feels like temperature) for each hour since 1948


What are the longest stretches with a heat index of 100+?


How about the years with the most hours with heat indices of 100+ since the late 1980s?

This summer refers to 2019

All of the 100+ heat index stretches greater than 4 hours each year since 1950


What is the all-time heat index record?

178 degrees!

Air temp: 108, dew point: 95 in Dhahran, Saudi Arabia, July 8, 2003


Thursday, July 11, 2019

Late June-Early July Lake Erie Water Temperatures

Quick look at satellite (GLSEA) Lake Erie water temperatures between June 25 and July 10 over the last 10 years


Tuesday, July 09, 2019

Baseball At The All-Star Break vs Last 10 Seasons

Major League Baseball at the All-Star break.  Unless otherwise noted, the graphs below shows numbers through the first half of each season (All-star break) since 2010. All data via Fangraphs and Baseball-Reference

First, home runs per plate appearance:


Percentage of ALL BALLS IN PLAY that are Home Runs continue to climb


Percent of Runs that come via Home Runs:


How often are balls put in play? Numbers have been dropping especially since 2015


Baseball's "Three True Outcomes" (Walk, Strikeout and Home Run) continue to rise


Strikeouts per plate appearance continue to climb:


Strikeouts AND Walks per plate appearance:


As expected, league wide ground ball rates are falling:


Yet flyball rates are steady over the last 3 years:


Flyball Power numbers (Slugging Pct) have increased this season as Flyball rates have stabilized. 

Season Totals

Power numbers (Slugging Pct) have also increased AFTER 2 STRIKES

Season Totals

53% drop since 2011 in Sacrifice Hits

Season Totals
Defensive shifts continue to rise (data via Fangraphs)





Wednesday, June 26, 2019

Flood Warnings Through June 25th

Issuance numbers for each NWS forecast office from January 1 through June 25 each of the last 10 years. Note that the colorized legend changes for each year depending on the range.

Which weather service office leads the pack this year?  NWS Indianapolis with 343. The most of any office through June 25th since 2010

NWS Cleveland Flood Warning count