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Post by skobie on Oct 27, 2015 14:08:22 GMT -5
Does anyone know how to actually calculate the Bad Weather (BW) for a site? I was trying to check our site with the FAA #s as we were advised months ago and I was under the impression that we just needed to know the # of obs in which we had freezing or frozen precipitation (freezing rain, freezing drizzle, sleet, snow and only counted once?) and then divided by the total # of obs for the site for the year. I cannot match the FAA #'s from the 2014 FOIA no matter what I do. From there I believe I know how to get the Bad Weather Operations (BWO), but either way I've been going by the Standard Operating Procedure: Service Standards. Any help would be greatly appreciated.
skobie
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Post by fzraman on Oct 27, 2015 19:49:38 GMT -5
Does anyone know how to actually calculate the Bad Weather (BW) for a site? I was trying to check our site with the FAA #s as we were advised months ago and I was under the impression that we just needed to know the # of obs in which we had freezing or frozen precipitation (freezing rain, freezing drizzle, sleet, snow and only counted once?) and then divided by the total # of obs for the site for the year. I cannot match the FAA #'s from the 2014 FOIA no matter what I do. From there I believe I know how to get the Bad Weather Operations (BWO), but either way I've been going by the Standard Operating Procedure: Service Standards. Any help would be greatly appreciated. skobie I believe that you have to figure the Bad weather operations for Atlanta or O'Hare to see which had the most that year by multiplying their "total actual traffic" times the climatological numbers for Frzg precip. Do the same for your station. The one with the largest Bad weather operations will be used in the formula along with BWO for your station. I believe he formula is: BWO for your station/BWO for (ATL or ORD) * 18 = your score You then add that to the alternate score and points for your individual Airport. Cat II/III;TWR LVL etc. etc. That will give you your composite score!! Confusing!! I hope that helps!! |
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Post by coldlover on Oct 28, 2015 1:48:24 GMT -5
I believe Skobie is asking actually how to calculate the bad wx for a site,, not the bad wx score which is described by fzraman.
To actually calculate the bad wx for a site (which I guess now is just freezing or frozen precip) -- I have been under the impression it has nothing to do with # of times the bad wx is reported in obs -- but rather the actual amount of time in a year (365 days) the bad weather occurs. 10% bad wx score would mean 36.5 days or 876 hours of freezing or frozen precip. At least that is how I understand it. I believe it is updated every 10 years just like climo normals are.
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Post by TCU 2U2 on Oct 28, 2015 5:43:31 GMT -5
I believe Skobie is asking actually how to calculate the bad wx for a site,, not the bad wx score which is described by fzraman. To actually calculate the bad wx for a site (which I guess now is just freezing or frozen precip) -- I have been under the impression it has nothing to do with # of times the bad wx is reported in obs -- but rather the actual amount of time in a year (365 days) the bad weather occurs. 10% bad wx score would mean 36.5 days or 876 hours of freezing or frozen precip. At least that is how I understand it. I believe it is updated every 10 years just like climo normals are. If you get the formula, please share. There have been a couple of FOI requests, searching for how the new algorithms are constructed & what raw data is used in obtaining the new bad weather scores. So far nothing of substance. Newer requests are pending. Last of the service standards (2014) were only obtainable via a FOI. No service standards for 2015 (as confirmed by a recent FOI request). 2016 service standards would normally be due NLT May 31, 2016. This is part of that so-called transparency. |
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Post by skobie on Oct 28, 2015 9:06:31 GMT -5
OK, so this is part of the problem as we don't even know how the FAA is calculating these numbers for Bad Weather in the first place even though they make it sound so simple in their "updated" Standard Operating Procedure from back in May. What a crock of shit that is too.
skobie
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Post by fzraman on Oct 29, 2015 9:37:20 GMT -5
OK, so this is part of the problem as we don't even know how the FAA is calculating these numbers for Bad Weather in the first place even though they make it sound so simple in their "updated" Standard Operating Procedure from back in May. What a crock of shit that is too. skobie The Weather scoring numbers for a site usually come from Climatalogical data that is obtained from the NWS and is generally updated every 10 years. It is calculated as a percentage(%)which is then applied to to the actual traffic count data to become the BWO score. I believe they used new updated 10 year climatology for the 2010 report. That is what they should still be using. The freezing Precip data is "FR%" |
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Post by tornado on Oct 29, 2015 12:36:16 GMT -5
The Weather scoring numbers for a site usually come from Climatalogical data that is obtained from the NWS and is generally updated every 10 years. It is calculated as a percentage(%)which is then applied to to the actual traffic count data to become the BWO score. I believe they used new updated 10 year climatology for the 2010 report. That is what they should still be using. The freezing Precip data is "FR%"
But LAWRS sites are ruining climatological data! Isn't this a conflict of interest? Using numbers in a calculation, when it is guaranteed that future numbers from the same data site will be erroneous, doesn't make sense! |
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Post by toofarnorth on Oct 29, 2015 15:53:17 GMT -5
Only the devil and the bean-counters are laughing...
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Post by snowwx on Jan 24, 2016 6:28:04 GMT -5
Lets see...bad weather scores...UM...FAA says low ceilings doesn't count , low visibility doesn't count, high winds doesn't count, heavy, moderate light snows, rains etc... doesn't count...None of this stuff is detrimental to aircraft operations...
UM...7000 FLIGHTS CANCELLED, or rerouted, during low pressure/"new definition Blizzard" and heavy snows with low ceilings low visibility and snows with high winds...According to the FAA DIDNT HAPPEN, Doesn't Count...
So The FAA says the blizzard was not detrimental to aircraft operations by their own definition of bad weather...WHAT A FARCE!! This needed to be pointed out to Congress...The FAA is always trying to manipulate reality to their agenda...which is no longer hidden...
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Post by tornado on Jan 24, 2016 13:27:07 GMT -5
You are exactly right, snowwx! This wasn't considered "bad weather" at all:  What would have been considered "bad weather", was the ice storm in the Carolinas on Friday- which was botched at LAWRS site Florence, South Carolina.  |
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Post by skobie on Jan 24, 2016 15:25:21 GMT -5
The whole thing's a farce and we all know it. We just have to make sure that everyone who's important in and to aviation understands it and knows it.
skobie
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