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Weekend Threat 12/14-12/15


IsentropicLift

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WTF?

More false rumors such as the following

NAM - NAM is only good under 6 hours

GFS - SE bias for coastals

UK - makes lows to tight and and pushed them inland

Canadian - Always the snowiest/coldest model

From my recollection the Canadian is almost always warm with coastals. It has even showed rain for some of our best snow storms over the last 5 years

The nam does not have a deadly range

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12z GFS for KSWF  - 5.7 of snow,  0.09 of ZR.   Total precip 0.87 for MMU vs. 0.66 for KSWF.

KMMU for my source. SWF was showing only 0.08" ZR. Looks like MMU is the hardest hit location I have stats for.

 

131214/1500Z  51  06008KT  24.0F  SNOW   14:1| 0.5|| 0.00|| 0.00|| 0.036   14:1|  0.5|| 0.00|| 0.00|| 0.04  100|  0|  0

131214/1800Z  54  05011KT  25.1F  SNOW   11:1| 0.9|| 0.00|| 0.00|| 0.086   12:1|  1.4|| 0.00|| 0.00|| 0.12  100|  0|  0

131214/2100Z  57  05013KT  25.6F  SNOW    9:1| 0.7|| 0.00|| 0.00|| 0.080   11:1|  2.1|| 0.00|| 0.00|| 0.20  100|  0|  0

131215/0000Z  60  04014KT  26.3F  SNOW    9:1| 1.7|| 0.00|| 0.00|| 0.191   10:1|  3.9|| 0.00|| 0.00|| 0.39  100|  0|  0

----------------------------------------------+----++-----+-------------++--------------++-------------++-----------+---+---

131215/0300Z  63  04014KT  27.9F  FZRA    0:1| 0.0|| 0.00|| 0.26|| 0.251   10:1|  3.9|| 0.00|| 0.26|| 0.64    0|  0|100

131215/0600Z  66  02013KT  31.7F  FZRA    0:1| 0.0|| 0.00|| 0.19|| 0.181   10:1|  3.9|| 0.00|| 0.45|| 0.83    0|  0|100

131215/0900Z  69  34009KT  31.7F  FZDZ    0:1| 0.0|| 0.00|| 0.05|| 0.048   10:1|  3.9|| 0.00|| 0.50|| 0.87    0|  0|100

 

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The logic behind the Euro being worse in the short range makes no sense.

 

Why would a model be good in the medium range but bad in the short range? You have to get the short range right in order to get the medium range right...

 

Perhaps it's just that the Euro's superiority over the other models is less since the other models get better in the short term, but to say that the Euro is "worse" in the short term makes no sense and goes against the chaos theory in model output as one goes out in time. 

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I never understood why people think the EURO would be bad in short range, if that was the case it would be even worst in the long range. One minor error 6-12 hrs out would lead to a larger differential 3-4 days out. Doesn't make sense to me. 

Yea exactly, although it has failed a few times this year less than 3 day out... so he might have read something pertaining to that.

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None of the models have been great. If anything the GGEM and the Euro led the way with the last minor event. The GFS had widespread 4-6" totals the day before. And the NAM was just awful showing that heavy band 75 miles NW of where it ultimately ended up.

 

Also none of the models had the surface over freezing for most of the area either, but most locals hit 32-34.

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Perhaps it's just that the Euro's superiority over the other models is less since the other models get better in the short term, but to say that the Euro is "worse" in the short term makes no sense and goes against the chaos theory in model output as one goes out in time. 

 

impeccable logic!  EURO doesnt get worse in short term,,, the other models just catch up with it.

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None of the models have been great. If anything the GGEM and the Euro led the way with the last minor event. The GFS had widespread 4-6" totals the day before. And the NAM was just awful showing that heavy band 75 miles NW of where it ultimately ended up.

 

Also none of the models had the surface over freezing for most of the area either, but most locals hit 32-34.

Yea they all overdid the cold air which lead to terrible snow ratios and melting

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For what? This always had been a 2-4 inch snowfall for the area before changing to either rain or sleet for NYC.

kind of like the forecasts for 3-5 inches of snow earlier this week....How many people saw 5"?

 

For areas S and E of i-95 this will be an inch or two and straight to rain - there will be no sleet or ZR in Brooklyn or LI... NW suburbs, probably...

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kind of like the forecasts for 3-5 inches of snow earlier this week....How many people saw 5"?

 

For areas S and E of i-95 this will be an inch or two and straight to rain - there will be no sleet or ZR in Brooklyn or LI... NW suburbs, probably...

ZR no but possibly sleet.

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I never understood why people think the EURO would be bad in short range, if that was the case it would be even worst in the long range. One minor error 6-12 hrs out would lead to a larger differential 3-4 days out. Doesn't make sense to me. 

its called grasping at straws with snow goggles on...its par the course.

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Horrendous might be a bit strong a word, but that would be a fairly nasty ice storm.

 

 

This past week we received freezing rain with temps in the 24-28F range.

It was a mild disaster in Highland Lakes until around 11 AM. Roads were a sheet of ice.

I measured 0.25 inches of ice.

1/2 inch of freezing rain would be a complete and utter disaster if your temps are 29F or below.

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