Dr. Jeff Masters' WunderBlog

Winter forecast, part I: the woolley bear prediction
Posted by: Dr. Jeff Masters, 1:48 PM GMT en Noviembre 20, 2008 +3
According to legend, the severity of the upcoming winter can be judged by examining the pattern of brown and black stripes on woolly bear caterpillars--the larvae of Isabella tiger moths. If the brown stripe between the two black stripes on either end of the caterpillar is thick, the winter will be a mild one. A narrow brown stripe portends a long, cold winter. Some traditional forecasters say that the 13 segments on the caterpillar's body correspond to the 13 weeks of winter.

The Hagerstown, Maryland woolley bear forecast
The Hagerstown, Maryland Town and Country Almanack has been publishing weather forecasts and weather lore for 211 years. The Almanack sponsors an annual woolly bear caterpillar event, where local school children in Hagerstown collect woolly bears. A panel of judges examines the collected specimens and issues a woolly bear forecast for the upcoming winter. The results of this year's contest, which ended October 31: "From the small number of woolly bears, the consensus is that the winter will be very mild. The woolly bears predicted this by their three (3) bands of which the front band (representing the first half of winter and black in color) was shorter in length and normal. The back band (representing the second half of winter) was very small, thus indicating the mild winter prediction. As a result of those markings, which were similar in all woolly bears, the sponsors were able to make the predictions."

Oil Valley Vick
Naturally, this forecast only applies to the Hagerstown, Maryland area, so other locales will need to do their own woolly bear work to gauge the local winter forecast. In Oil City, Pennsylvania, just 150 miles northwest of Hagerstown, organizers of the Pumkin Bumkin Festival have located the lair of "Oil Valley Vick", a woolly bear caterpillar of unknown forecasting ability, but great potential. In his inaugural forecast on October 23 this year, Oil Valley Vick wowed the crowd at the Pumkin Bumkin Festival when he crawled out of his log. The black stripes covering fully 2/3 of Oil Valley Vick's body left no doubt that he expected a cold, severe winter for northwestern Pennsylvania.


Figure 1. Kelly the woolly bear caterpillar with her owner, six-year-old Kurstin Hartsell of Ansonville, NC. Image credit: Jim Morton, Avery County Chamber of Commerce.

The Banner Elk, North Carolina Woolly Bear forecast
In Banner Elk, NC it's the fastest woolly bear caterpillar which is judged to be the best forecaster. After successfully out-sprinting hundreds of other woolly bears, this year's winner of the 31st Annual Woolly Worm Festival race was Kelly the Woolly Worm, raced by six-year-old Kurstin Hartsell of Ansonville, NC. Kelly the Woolly Worm's official forecast for the winter of 2008-2009 calls for the first four weeks to be cold and snowy, followed by three weeks of seasonably cold weather, followed by six weeks of snowy and cold weather (severely cold in week 11, March 1-7). A study of the predictions of the Banner Elk woolly bears between 1978 and 2000 revealed that "woolly worm winter predictions were exactly on target eight times out of 23, or 34.8%. Woolly worm predictions were close (4.0-4.9) another five times (21.7%). Woolly worm predictions were right in some areas, wrong in others (3.0-3.9) six times (26.1%). Woolly worm predictions were wrong more than they were right (2.0-2.9) four times (17.4%). Put another way, the woolly worms were close or completely right 57% of the time, and more than half right 82.6% of the time".

Other studies of woolly bear forecast accuracy
Several scientific studies have been done on woolly bear caterpillar forecasts, including one by the American Museum of Natural History. None of these studies has shown any correlation between woolly bear markings and the severity of the upcoming winter. According to the Old Farmer's Almanac, Dr. Charles Curran, curator of insects at the American Museum of Natural History in New York City, studied woolly bear markings between 1948-1956 in Bear Mountain State Park, 40 miles north of New York City. He found some preliminary results that seemed to indicate that the thickness of the bands might indicate the severity of the upcoming winter. However, Dr. Curran gave up the study in 1955 after finding two groups of caterpillars living near each other that had vastly different predictions for the upcoming winter, according to science writer Ned Rozell.

So, two out of three woolley bear forecasts point to a colder than average winter for the Appalachian region of the U.S. In upcoming blog posts, I'll analyze what NOAA's computer models and the Old Farmer's Almanac have to say about the upcoming winter.

Portlight making keynote presentation at charity funding conference today
The Portlight.org charity is making the keynote presenation at a funding conference hosted by a coalition of state and federal agencies which work in the area of post-disaster relief involving people with disabilities. The presentation is this morning, November 20, at 9:15 am EST. You can follow the proceedings via the portlight webcam at stormjunkie.com. At the conference, they plan to discuss the Hurricane Ike relief efforts made possible by the Weather Underground community. Thanks for everyone's support for making all this possible!

Jeff Masters
Categories: Winter Weather
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Reader Comments
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51. Hurricane4Lex 4:02 PM GMT en Noviembre 20, 2008    
8,037.18 +39.90 (+0.50%)

now its up

LOL
Member Since: Agosto 14, 2008 Posts: 0 Comments: 657
52. TampaSpin 4:05 PM GMT en Noviembre 20, 2008    
Bone this is for you.......LMAO

Member Since: Septiembre 2, 2007 Posts: 175 Comments: 19747
53. NEwxguy 4:06 PM GMT en Noviembre 20, 2008    
Quoting Hurricane4Lex:
RE 32:

forgot to reread what was already posted earlier

sorry NE

it all makes sense now


not a problem,lex,these things are good for a laugh
Member Since: Septiembre 6, 2007 Posts: 816 Comments: 13125
54. katlbeach 4:11 PM GMT en Noviembre 20, 2008    
Tampa,
thanks for the Clapton break. Great tune to interject into the morning.
I saw another great guitarist last night, Vince Gill. He has a cold and joked about being unable to hit high notes with his voice, but it was a good show anyway. He didn't wail on the guitar like I have seen him wail before, because it was an acoustic show, but it was still fun. He is a pretty funny guy in addition to being such a talented musician.
Member Since: Septiembre 22, 2008 Posts: 0 Comments: 42
55. StormJunkie 4:14 PM GMT en Noviembre 20, 2008    
presslord to speak on disaster response and people with disabilities shortly...
Member Since: Agosto 17, 2005 Posts: 26 Comments: 15218
56. Bonedog 4:14 PM GMT en Noviembre 20, 2008    
=)


yea NE just thinking about too. HD and Lowes would be attacked.
Member Since: Julio 14, 2005 Posts: 14 Comments: 7418
57. AussieStorm 4:17 PM GMT en Noviembre 20, 2008    

IT crashed down from the heavens, lighting up the sky.

This picture, captured at Ballina on the Far North Coast, New South Wales, Australia,

Article from: The Daily Telegraph

Cheers AussieStorm
Member Since: Septiembre 30, 2007 Posts: 5 Comments: 13351
58. theshepherd 4:19 PM GMT en Noviembre 20, 2008    
52 Tampa
ROFLMAO at the 70's era lefthanded neck on the right handed body. Gotta luv the Fender mentality.
Member Since: Septiembre 11, 2008 Posts: 9 Comments: 8205
59. Bonedog 4:20 PM GMT en Noviembre 20, 2008    
awsome picture Aussie

you take it?
Member Since: Julio 14, 2005 Posts: 14 Comments: 7418
60. HIEXPRESS 4:21 PM GMT en Noviembre 20, 2008    
Wooly Bears? Blinding me with Science LOL

W/L mode
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61. AussieStorm 4:24 PM GMT en Noviembre 20, 2008    
Quoting Bonedog:
awsome picture Aussie

you take it?

I wish... i could of taken sum last night at about 1am when we had a nice storm pass over.
Member Since: Septiembre 30, 2007 Posts: 5 Comments: 13351
62. Bonedog 4:26 PM GMT en Noviembre 20, 2008    
still awsome nontheless.

I love weather photography especially lightning shots
Member Since: Julio 14, 2005 Posts: 14 Comments: 7418
63. Hurricane4Lex 4:28 PM GMT en Noviembre 20, 2008    
It is awesome

anyone here know how to build a camera that's rigged to do that (take a picture like the one Aussie showed us)

I know some have done a "noise activated" type of camera
Member Since: Agosto 14, 2008 Posts: 0 Comments: 657
64. RobDaHood 4:30 PM GMT en Noviembre 20, 2008    
"Dr. Curran gave up the study in 1955 after finding two groups of caterpillars living near each other that had vastly different predictions for the upcoming winter"

hehe - sounds familiar...weather blogger caterpillars!
Member Since: Septiembre 2, 2008 Posts: 78 Comments: 25935
65. streamtracker 4:31 PM GMT en Noviembre 20, 2008    
Quoting theshepherd:
Streamtracker
From last blog: Thanks for link to Argo Floats.
That answered my last question from yesterday's GW war.
Guess you just can't do better than sticking a thermometer in a bottle for reliability.
Old fashion ways "sometimes" rule.


No problem.

Nice catch there. Is that a snook? If it is that's an above average fish, isn't it?
Member Since: Octubre 24, 2005 Posts: 12 Comments: 1730
66. Bonedog 4:33 PM GMT en Noviembre 20, 2008    
63. Hurricane4Lex

most times the photographer leaves the shutter open for extended periods of time (30 sec to 1 min) depending on lighting and other conditions.
Thats why alot of times you have multiple bolts in one frame and, as the example above shows, an overexposure in the most intense light.

Some digital cameras have multiple frame settings that can take up to 10 frames a second. That is another way, when a bolt is noticed by the photographer he hits the shutter button and clicks off multiple frames and usually in one of them is the "shot".

I have heard of a person using a microphone attached to a shutter trigger but dont really know if it was a viable option.

The best photos I have seen and from some of the best weather photographers all used the extended exposure technique.
Member Since: Julio 14, 2005 Posts: 14 Comments: 7418
67. RobDaHood 4:33 PM GMT en Noviembre 20, 2008    
Quoting Hurricane4Lex:
us)

I know some have done a "noise activated" type of camera


Not for lightning, the light gets to the camera before the sound. You could do a time lapse and maybe get something...easiet way is high res video and then do frame captures to save the stills you want.
Member Since: Septiembre 2, 2008 Posts: 78 Comments: 25935
68. RobDaHood 4:36 PM GMT en Noviembre 20, 2008    
66. Bonedog

The best photos I have seen and from some of the best weather photographers all used the extended exposure technique.

good technique if your equiptment allows.
Member Since: Septiembre 2, 2008 Posts: 78 Comments: 25935
69. TampaSpin 4:37 PM GMT en Noviembre 20, 2008    
Last song......i played this to my son on the way to a Bucs game when he was 10 years old.....i had the sun roof open on the Caddy and cranked up the Bose system and told him to close his eyes and push the seat back.....LOL...he said "Dad that's the most awsome song i have ever heard"

Member Since: Septiembre 2, 2007 Posts: 175 Comments: 19747
70. Bonedog 4:37 PM GMT en Noviembre 20, 2008    
Lex great website for weather photography

techniques
Member Since: Julio 14, 2005 Posts: 14 Comments: 7418
71. Hurricane4Lex 4:43 PM GMT en Noviembre 20, 2008    
RE 66 67 68 and 70:

thanks :)
Member Since: Agosto 14, 2008 Posts: 0 Comments: 657
72. theshepherd 4:44 PM GMT en Noviembre 20, 2008    
65 stream
Yep, that's a snookeroonie. 42"...
Not an unusual catch.
Keeper slot is 28 to 32 inches. Only caught one that small this year...so far.
Used to see a lot bigger when they were considered a trash fish.
Member Since: Septiembre 11, 2008 Posts: 9 Comments: 8205
73. Cotillion 4:46 PM GMT en Noviembre 20, 2008    
Greetings all.

Fairly blustery here but not too bad, had a day to forget. :)
Member Since: Agosto 23, 2008 Posts: 7 Comments: 5300
74. TampaSpin 4:49 PM GMT en Noviembre 20, 2008    
It looks like next weekends storm is going to hammer the midwest and east coast.....be prepared as this could be one we will talk about a long time.....The snow amounts could be record setting for this time of year....
Member Since: Septiembre 2, 2007 Posts: 175 Comments: 19747
75. theshepherd 4:49 PM GMT en Noviembre 20, 2008    
69 Tampa
Good ol' Flarda boys
Member Since: Septiembre 11, 2008 Posts: 9 Comments: 8205
76. TampaSpin 4:50 PM GMT en Noviembre 20, 2008    
Gotta run....get some things done...gotta mow the grass....sorry to say that to you all up north.....LOL...BBL
Member Since: Septiembre 2, 2007 Posts: 175 Comments: 19747
77. Bonedog 4:52 PM GMT en Noviembre 20, 2008    
74. TampaSpin

I hope so I hope so!

From your fingers to the snow God's ears
Member Since: Julio 14, 2005 Posts: 14 Comments: 7418
78. RobDaHood 5:01 PM GMT en Noviembre 20, 2008    
73. Cotillion

Hey!

sorry, was out listening to "Freebird"!

Seems all my memories are tied to song titles
Member Since: Septiembre 2, 2008 Posts: 78 Comments: 25935
79. pottery 5:06 PM GMT en Noviembre 20, 2008    
Greetings.
Heavy cloud cover, rain is threatening. A tropical wave is overhead.
All is as it should be.......
Member Since: Octubre 24, 2005 Posts: 0 Comments: 20708
80. RobDaHood 5:08 PM GMT en Noviembre 20, 2008    
Hey Pottery,

Looks like you're "surrounded"
Member Since: Septiembre 2, 2008 Posts: 78 Comments: 25935
81. theshepherd 5:09 PM GMT en Noviembre 20, 2008    
yo pot
Member Since: Septiembre 11, 2008 Posts: 9 Comments: 8205
82. pottery 5:11 PM GMT en Noviembre 20, 2008    
Yeah Rob. All 4 sides, top and bottom. But I am well armed for the impending onslaught. Got my Parasol all primed and ready. And a fridge filled with Vital Supplies, getting colder.
How is life with you ?
Member Since: Octubre 24, 2005 Posts: 0 Comments: 20708
83. pottery 5:13 PM GMT en Noviembre 20, 2008    
Hi Sheph.
My son-in-law is Sheppard. You guys probably have genetic resemblances.......
Member Since: Octubre 24, 2005 Posts: 0 Comments: 20708
84. theshepherd 5:18 PM GMT en Noviembre 20, 2008    
Pot, not like you to insult your family that way.
Member Since: Septiembre 11, 2008 Posts: 9 Comments: 8205
85. pottery 5:19 PM GMT en Noviembre 20, 2008    
heheheheheh
Member Since: Octubre 24, 2005 Posts: 0 Comments: 20708
86. Cotillion 5:20 PM GMT en Noviembre 20, 2008    
Hey Pottery, Rob. :)
Member Since: Agosto 23, 2008 Posts: 7 Comments: 5300
87. RobDaHood 5:20 PM GMT en Noviembre 20, 2008    
82. pottery

Everything's great man. Tim's musical suggestions got me primed this morning, and he also reminded me that I have things to do outside. Warming up nicely so I'm going out for a while before I end up with tunnels in my carpel!

Have a good one!
Member Since: Septiembre 2, 2008 Posts: 78 Comments: 25935
88. theshepherd 5:23 PM GMT en Noviembre 20, 2008    
lunch break
Member Since: Septiembre 11, 2008 Posts: 9 Comments: 8205
89. Cotillion 5:27 PM GMT en Noviembre 20, 2008    
Y'all should come in and say hi in the channel, watch the webcam at Portlight!
Member Since: Agosto 23, 2008 Posts: 7 Comments: 5300
90. pottery 5:32 PM GMT en Noviembre 20, 2008    
I am out till tonight.
Hopefully, one of you all can invent a topic to quarrel about then.
Caterpillars is not going to do it..........
Member Since: Octubre 24, 2005 Posts: 0 Comments: 20708
91. Cotillion 5:41 PM GMT en Noviembre 20, 2008    
Quoting pottery:
I am out till tonight.
Hopefully, one of you all can invent a topic to quarrel about then.
Caterpillars is not going to do it..........


No problem.

"Baseball is the worst sport ever invented." Discuss.

LOL
Member Since: Agosto 23, 2008 Posts: 7 Comments: 5300
92. NEwxguy 5:42 PM GMT en Noviembre 20, 2008    
Quoting TampaSpin:
It looks like next weekends storm is going to hammer the midwest and east coast.....be prepared as this could be one we will talk about a long time.....The snow amounts could be record setting for this time of year....


Except for the great music,you've the bearer of bad news,cut it out
Member Since: Septiembre 6, 2007 Posts: 816 Comments: 13125
93. IKE 6:10 PM GMT en Noviembre 20, 2008    
GM hits lowest price since Depression

Shares on the stock market.
Member Since: Junio 9, 2005 Posts: 23 Comments: 37044
94. Hurricane4Lex 6:22 PM GMT en Noviembre 20, 2008    
Doh!

7,991.23 -6.05 (-0.08%)

back in the red
Member Since: Agosto 14, 2008 Posts: 0 Comments: 657
95. aspectre 6:24 PM GMT en Noviembre 20, 2008    
24. Hurricane4Lex RE 21: "what does meteors have to do with winter?

meteorology
Member Since: Agosto 21, 2007 Posts: 0 Comments: 4846
96. Hurricane4Lex 6:27 PM GMT en Noviembre 20, 2008    
Quoting aspectre:
24. Hurricane4Lex RE 21: "what does meteors have to do with winter?

meteorology


LOL!
Member Since: Agosto 14, 2008 Posts: 0 Comments: 657
97. Hurricane4Lex 6:28 PM GMT en Noviembre 20, 2008    
8,007.55 +10.27 (+0.13%)


yay! (back in the green)

LOL
Member Since: Agosto 14, 2008 Posts: 0 Comments: 657
98. Hurricane4Lex 6:34 PM GMT en Noviembre 20, 2008    
Instead of wasting space on the US economy I'm just going to say

red green red green red green red green.......then ________


(insert what you think it will be)

I'm off later every1
Member Since: Agosto 14, 2008 Posts: 0 Comments: 657
99. IKE 6:41 PM GMT en Noviembre 20, 2008    
Quoting Hurricane4Lex:
Instead of wasting space on the US economy I'm just going to say

red green red green red green red green.......then ________


(insert what you think it will be)

I'm off later every1


At least it's an alternative to Global Warming.....
Member Since: Junio 9, 2005 Posts: 23 Comments: 37044
100. Cotillion 6:46 PM GMT en Noviembre 20, 2008    
Quoting IKE:


At least it's an alternative to Global Warming.....


Way to go Ike, someone's gunna bring the two together now. :(

Member Since: Agosto 23, 2008 Posts: 7 Comments: 5300
101. IKE 6:49 PM GMT en Noviembre 20, 2008    
Quoting Cotillion:


Way to go Ike, someone's gunna bring the two together now. :(



I can think of one that might, but I better not name who, on here..lol.....
Member Since: Junio 9, 2005 Posts: 23 Comments: 37044

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About JeffMasters
Jeff co-founded the Weather Underground in 1995 while working on his Ph.D. He flew with the NOAA Hurricane Hunters from 1986-1990.

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