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April 2013 General Discussion Part 2


MidwestChaser

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oops...  8th-14th Milwaukee had high temps of  50, 39, 38, 38, 43, 40 and 49

 

[CPC embarrassment snipped]

 

Their forecasts up to the 14 day window aren't usually that bad, but dang that's terrible. Still not as bad as the Morch they forecasted in February. In other laughs, they originally predicted above-normal precip for april for the subforum in Mid-March, then yanked it from the forecast entirely on the 0 lead time update. If there's any better evidence that even moderate-term precipitation forecasting is still in total infancy and not to be taken seriously, that has to be it.

 

I'm beginning to question the utility of even having them do published non-experimental forecasts. They're good at persistence and not much else. I mean, their current set of 3-month forecasts do nothing but forecast above-normal temps for the subforum for the next 1.5 years. Really?

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Mod snow now. Effin' A.

 

Yep. The column cooled off nicely and better than modeled. They should have kept the snow wording in the forecast. 35 degrees at noon on april 24 is pretty much nuts though. Radar looks more like february 24.

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No bitching from MI.. you guys already had a 70 and even 80 in detroit.

 

If it makes you feel any better, the only reason we got to 80 for all of probably 5 minutes was because we had howling southerly flow gusting over 50 MPH. Not quite a day at the park (and even if you did go to the park, you then got stuck in the ensuing severe squall line).

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At 40° here with some sun breaking out.

 

In the last 2 weeks ending yesterday, here is the amount of cold weather records that have been broken.

 

RecordSnowfall-23Apr13.png

 

Area that got the big snows out east also getting a decent spring too compared to back in these parts :blahblah:

 

At least LAF and back west saved our March with the big snow storm.

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^Yeah a lack of reports from the East Coast.

 

Sounds like a little snow tonight in this area.

 

 

 

TONIGHT...FORECAST CONFIDENCE IS MEDIUM.

MAIN FOCUS TONIGHT IS PCPN TYPE WITH FAST-MOVING...VIGOROUS SHORT
WAVE. STRONGER FRONTOGENETIC RESPONSE ON 00Z NAM AND ECMWF...WITH
THE FOCUS MAINLY ACROSS THE SOUTHERN CWA...VERSUS THE 00Z GFS.
INSTABILITY NOTED WITH ELEVATED MAXIMA OF SATURATED EPV COINCIDENT
WITH STRONG FRONTOGENETIC RESPONSE ON NAM...WITH THE RESULTANT
CONVECTIVE PCPN COOLING THE COLUMN BELOW FREEZING TO THE SURFACE
ALLOWING THE MODEL TO PRODUCE 1.5 INCHES OF SNOW AT KENW...WHILE
KEEPING ALL RAIN AT MKE WITH ABOVE 0C IN THE LOWEST 1K FEET. GFS
NEVER SATURATES THE DENDRITE GROWTH ZONE AT MSN...AND ONLY BRIEFLY
IN THE EAST.

WILL TIME PCPN ACROSS CWA WITH STRONGEST FORCING RIGHT WITH
WAVE...WITH CATEGORICAL POPS INTO THE WEST BETWEEN 03Z AND 06Z..AND
THE EAST BETWEEN 06Z AND 09Z. BLEND OF SOLUTIONS WITH MORE OF A NOD
TOWARD THE NAM WILL START PCPN AS ALL RAIN GIVEN THERMAL RIDGE IN
PLACE THEN MIX WITH AND CHANGE TO ALL SNOW. FAST MOVEMENT BRINGS QPF
TOTALS AROUND 0.05 INCH...AND LATE CHANGE OVER LIMITS ANY SNOW
ACCUMULATIONS TO ONLY A FEW TENTHS OF AN INCH ON GRASSY SURFACES AT
MOST.

 

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At 40° here with some sun breaking out.

 

In the last 2 weeks ending yesterday, here is the amount of cold weather records that have been broken.

 

RecordSnowfall-23Apr13.png

 

 

 

 

Looks like us a long the lake are the only ones that had a Spring lolllllllll..  What a waste of time looking up all those warm April temps during the day.

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That map probably gives Brett Anderson and Jeff Masters indigestion.

 

Brett has published his Euro weekly interpretation maps for almost a few months now with vast cold and below normal areas in the U.S. and Canada. I have to imagine he gags a little bit each time he has to do it, but he at least doesn't get snotty or snarky about it on his blog.

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Brett has published his Euro weekly interpretation maps for almost a few months now now with vast cold and below normal areas in the U.S. and Canada. I have to imagine he gags a little bit each time he has to do it, but he at least doesn't get snotty or snarky about it on his blog.

 

What lead time is he using? Most "warmers" seem to default to above normal on anything farther than 1 month out.

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What lead time is he using? Most "warmers" seem to default to above normal on anything farther than 1 month out.

 

He goes up to about 3-4 weeks out. Here's his latest. He's going dry and warm next week for most of the subforum then "seasonable" the rest of the forecast period. I've never seen the source product he's using, which is one of the proprietary long-term ECMWF products. FWIW, it always seems more accurate (and specific) than the CPC's attempts.

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He goes up to about 3-4 weeks out. Here's his latest. He's going dry and warm next week for most of the subforum then "seasonable" the rest of the forecast period. I've never seen the source product he's using, which is one of the proprietary long-term ECMWF products. FWIW, it always seems more accurate (and specific) than the CPC's attempts.

 

4 weeks is impressive, if accurate. 3 weeks isn't too bad, but that's getting into territory that the layman (myself) is able to take a pretty good stab at.

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