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Can anyone find a probability chart for weather accuracy relating to future forecast?

Posted on 2/25/19 at 7:53 pm
Posted by TheAstroTiger
Member since Jun 2018
3101 posts
Posted on 2/25/19 at 7:53 pm
Meaning something that shows the probability of weather report being accurate 24 hours from now. 48 hours from now. Exc. I’m just curious how accurate weather is 5 days out compared to 24 hours out.
Posted by tigerbutt
Deep South
Member since Jun 2006
26309 posts
Posted on 2/25/19 at 7:53 pm to
Lick your finger and stick it outside.
Posted by Jim Rockford
Member since May 2011
105229 posts
Posted on 2/25/19 at 7:55 pm to
I just go by the Peejcast.
Posted by East Coast Band
Member since Nov 2010
66950 posts
Posted on 2/25/19 at 7:55 pm to
quote:

Meaning something that shows the probability of weather report being accurate 24 hours from now. 48 hours from now. Exc. I’m just curious how accurate weather is 5 days out compared to 24 hours out.


Around here from June through August, you can predict the forecast now: Partly cloudy, high in the 90s, chance of afternoon thunderstorms. Overnight low about 75.

Other times of the year, forget it.
Posted by BowlJackson
Birmingham, AL
Member since Sep 2013
52881 posts
Posted on 2/25/19 at 7:55 pm to
quote:

I’m just curious how accurate weather is 5 days out compared to 24 hours out.


Less
Posted by TheArrogantCorndog
Highland Rd
Member since Sep 2009
15923 posts
Posted on 2/25/19 at 7:58 pm to
quote:

Can anyone find a probability chart for weather accuracy relating to future forecast?


It got destroyed when Jay Grimes's jeans got washed

Always check your pockets, baws
Posted by Klingler7
Houston
Member since Nov 2009
12620 posts
Posted on 2/25/19 at 8:06 pm to
For Southern Louisiana : Summertime: climatology works well: 24 hours out:
Temperatures 92F in afternoon to 73 nighttime. Persistence works well. 40 % chance of showers during June works well because climatology both Baton Rouge and New Orleans airports average 15-17 days of thunder. 12 days of measurable rainfall. 12days /30 days ~ 40 % .

Winter has less accuracy in a 120 hour forecast because you have progressive upper level troughs/ridges that produce their own set of weather. Low level jets and vorticity maximums can alter lift and energy over a difference of 300 miles from what was forecasted. Various model outputs can bust a five day forecast.
This post was edited on 2/25/19 at 8:08 pm
Posted by tss22h8
30.4 N 90.9 W
Member since Jan 2007
18793 posts
Posted on 2/25/19 at 8:07 pm to
Posted by Pectus
Internet
Member since Apr 2010
67302 posts
Posted on 2/25/19 at 8:07 pm to
100% chance of weather.
Posted by gmac8604
Green Bay, WI
Member since Jun 2012
1390 posts
Posted on 2/25/19 at 8:13 pm to
Ehh weather will swivel on a dime. My method is 93% accurate with a lead time of 1hr. Its called "The Toilet Seat Test."
Posted by upgrayedd
Lifting at Tobin's house
Member since Mar 2013
138885 posts
Posted on 2/25/19 at 8:16 pm to
they predicted epic rain events last week and they were off horribly
Posted by BurningHeart
Member since Jan 2017
10064 posts
Posted on 2/26/19 at 6:14 am to
The BR weather said clear all last night.

Then it started raining so I checked the forecast, all of a sudden the forecast changed to rainy all night.
Posted by cable
Member since Oct 2018
9735 posts
Posted on 2/26/19 at 6:18 am to
Solely based on personal experience

24 hours out - 50-60%
5 days out - 5-20%



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