Sunday, August 30, 2009

Winter '09 / '10 - Farmer's Almanac

First out of the gate for the upcoming winter is the Farmer's Almanac...

"For the Middle Atlantic and Northeast States, for instance, we are predicting a major snowfall in mid-February; possibly even blizzard conditions for New England indeed, even shovelry is not dead)."

More...

Saturday, April 11, 2009

Final Results - 10th Annual Regular Season Snowfall Forecast Contest

8 Storms
683” Total Snowfall
2,353 Station Forecasts

25 Forecasters
6 Rookies
3 Interns
4 Journeymen
12 Seniors

Don Sutherland has successfully defended his 'Chief Forecaster' title for the second year in a row by winning handily the 10th Annual NE.Wx Snowfall Forecast Contest.

Don/s final scores:
AVG SUMSQ Z-score: -1.025
AVG Total Absolute Error Z-score: -1.171
AVG Error: 1.37"

The award for placing first is a copy of the two-volume set Northeast Snowstorms by Kocin / Uccellini and three (3) months of free access to StormVista GOLD

Second place goes to Shanabe...
Shanabe/s final scores:
AVG SUMSQ Z-score: -0.743
AVG Total Absolute Error Z-score: -0.765
AVG Error: 1.62"
Shanabe/s prize is two (2) months of free access to StormVista GOLD

Donald Rosenfeld finished in third place...
Donald Rosenfeld final scores:
AVG SUMSQ Z-score: -0.737
AVG Total Absolute Error Z-score: -0.660
AVG Error: 1.56"
Donald Rosenfeld/s prize is one (1) month of free access to StormVista GOLD

Honorable Mention: Raven
Raven/s final scores:
AVG SUMSQ Z-score: -0.564
AVG Total Absolute Error Z-score: -0.438
AVG Error: 1.83"

Complete results and season summary @ the web site.

Many thanks to Jack @ StormVista for his generous contribution of prizes to the top forecaster after each storm and again at season/s end.

Thanks also...to everyone who entered a forecast. Hope you enjoyed the many challenges and we look forward to seeing y'all again next winter.

Saturday, April 04, 2009

Final Results - 8th Annual Season-total Snowfall Forecast Contest

Everyone/s forecast has been verified. The final results summary and verifications are available here.

Not a bad season overall. Sum-total snowfall was ~10% above normal.

Thanks to all who entered. Hope to see y'all again next year.

Graphic: Monthly 500 mb geo-height anomalies (D-J-F-M)

Thursday, April 02, 2009

Update - 8th Annual Season-total Snowfall Forecast Contest

The last day of March marked the end of the season-total snowfall forecasting season.

The four-month snowfall totals have been tallied...the forecasts have been scored... and the final results will be posted this weekend.

The sum-total snowfall for all 25 stations was 1,010"...about 10% above normal...and just shy of last year/s 1,039" snow-total.

Thursday, March 26, 2009

Friday, March 20, 2009

Thursday, March 12, 2009

Friday, March 06, 2009

Snowfall Summary - February '09

February/s storm track...such as it was...returned to the upper mid-west and the Great Lakes region where it was at the start of winter.

Not a single contest-worthy storm occurred...although a handful of extreme northern forecast stations observed 8 - 16" snows.

Bangor (BGR) had the best of it...racking up 160% of normal (15.5") monthly snowfall. FEB/s total-snowfall alone made up 49% of the station/s D-J-F-M average snowfall and with one month to go...BGR is 148% of normal.

Philadelphia (PHL) was the only other forecast station to observe more than normal snows for FEB...which is rather odd...considering FEB is prime-time for most mid-Atlantic stations. PHL 8.4" was 118% of normal (7.1")and 42% of an average season/s snow total.

In spite of a lackluster month...Bridgeport(BDR)...Boston (BOS) and Concord (CON) stand @ 136%...135%...and 125% of normal snowfall for the D-J-F-M period.

Other stations above normal currently with one month left to go:
PVD (116%)
BTV (115%)
PWM (110%)
ORH (104%)

Caribou (CAR) is all but normal (98%) and will easily come in slightly above by 31 MAR. In light of the recent MAR 2 snows...most other stations have a good chance of reaching season-normal.

All but certain losers appear to be MDT...BWI...IAD...DCA...SBY...RIC...and ORF.

Green => Top 25%
Red => Bottom 25%

WFO Monthly/Daily Climate Data

NCDC Period-of-Record Snowfall Climatology

Thursday, March 05, 2009

QBO - February '09

(Updated)

FEB/s QBO weighs in @ 12.33...a seven month relative maxima coming after three consecutive months of increasing values during which time decreases would otherwise have been expected.

Going back through past positive cycles since 1948 finds a similar fluctuation happened in 1985/6 (16 months > 0). If past is prologue then QBO won/t flip until the start of astro-summer.

(end update)

Original posted 2/26/09



FEB/s QBO should come in @ 10+ when it/s officially reported in early MAR...right where it/s been for the past 8 of 9 months. It dipped briefly below 10 to 9.12 in NOV '08.

Also noteworthy is the lingering...last gasp evidence of this winter/s long-duration SSW event still underway...marked by deep easterly wind (negative values into the board; shaded blue in the plot area over the Pole) in the 10 - 100 mb layer.

NOAM Temperature Departures - February '09

Temperature anomaly forecast...



Observed temperature anomaly ...



Precipitation anomaly forecast...



Observed precipitation anomaly...