Forecasters: 11

10 veterans
1 rookie

 

In the table...

Yellow cells indicate the best score in category. 

Forecast STP is yellow if within +/- 5% of observed STP.

 

Blue (Red) cells indicate the top (lower) 25% percentile.

 

Final Standings - all Forecasters

 

Forecaster

Class

4casts

Sum Square

STP

TOTAL Absolute

AVG Absolute

 

 

 

 

 

Error

Error Z

%MPROV over AVG

Rank

97.70

Error

Error Z

%MPROV over AVG

Rank

Error

Error Z

%MPROV over AVG

Rank

Error

Error Z

%MPROV over AVG

Rank

RSQ

RSQ Z

%MPROV over AVG

Rank

Forecaster

emoran

Senior

21

79.2

-1.013

52.8%

1

   96.15

1.55

-1.097

86.5%

1

25.45

-1.213

37.2%

1

1.21

-1.402

39.7%

1

90.2%

0.908

13.9%

1

emoran

donsutherland1

Chief

19

90.8

-0.880

45.8%

2

   90.90

6.80

-0.518

40.8%

5

25.90

-1.177

36.1%

2

1.36

-1.137

32.2%

2

87.9%

0.719

11.0%

2

donsutherland1

Raven

Senior

23

101.5

-0.758

39.5%

3

  117.85

20.15

0.957

-75.4%

10

36.75

-0.304

9.3%

5

1.60

-0.724

20.5%

3

87.4%

0.679

10.4%

3

Raven

NYNJPAWeather

Rookie

19

119.5

-0.551

28.7%

4

   95.00

2.70

-0.970

76.5%

2

32.00

-0.686

21.0%

3

1.68

-0.572

16.2%

4

83.0%

0.312

4.8%

5

NYNJPAWeather

Newa

Journeyman

19

122.8

-0.513

26.7%

5

  107.50

9.80

-0.186

14.7%

7

35.90

-0.372

11.4%

4

1.89

-0.212

6.0%

5

83.0%

0.309

4.7%

6

Newa

TQ

Senior

16

156.2

-0.131

6.8%

7

   83.10

14.60

0.344

-27.1%

8

38.10

-0.195

6.0%

6

2.38

0.652

-18.5%

10

79.8%

0.050

0.8%

8

TQ

Donald Rosenfeld

Senior

23

155.2

-0.142

7.4%

6

  131.00

33.30

2.409

-189.9%

11

47.90

0.594

-18.2%

9

2.08

0.128

-3.6%

6

83.5%

0.357

5.5%

4

Donald Rosenfeld

apisces1

Journeyman

19

181.3

0.157

-8.2%

8

   90.00

7.70

-0.418

33.0%

6

39.60

-0.074

2.3%

7

2.08

0.130

-3.7%

7

78.0%

-0.099

-1.5%

9

apisces1

Mitchel Volk

Senior

19

214.3

0.536

-27.9%

9

   79.00

18.70

0.797

-62.8%

9

41.60

0.087

-2.7%

8

2.19

0.315

-8.9%

8

74.7%

-0.374

-5.7%

10

Mitchel Volk

ilibov

Senior

23

218.3

0.581

-30.3%

10

   90.95

6.75

-0.523

41.2%

4

50.65

0.815

-25.0%

10

2.20

0.338

-9.6%

9

80.3%

0.091

1.4%

7

ilibov

jackzig

Senior

21

404.5

2.715

-141.3%

11

  102.00

4.30

-0.794

62.6%

3

71.90

2.525

-77.4%

11

3.42

2.484

-70.3%

11

43.5%

-2.952

-45.1%

11

jackzig

Forecast Parameters

222

Error

Error Z

% MPRV

Rank

STP

Error

Error Z

%MPRV

Rank

Error

Error Z

%MPRV

Rank

Error

Error Z

%MPRV

Rank

RSQ

RSQ Z

%MPRV

Rank

Forecast Parameters

MIN

16

79

-1.013

-141.3%

1

79.00

1.55

-1.097

-189.9%

1

25.5

-1.213

-77.4%

1

1.21

-1.402

-70.3%

1

43.5%

-2.952

-45.1%

      1

MIN

MAX

23

404

2.715

52.8%

11

131.00

33.30

2.409

86.5%

11

71.9

2.525

37.2%

11

3.42

2.484

39.7%

11

90.2%

0.908

13.9%

    11

MAX

AVG

20

168

0.000

0.0%

6

98.50

11.49

0.000

0.0%

6

40.5

0.000

0.0%

6

2.01

0.000

0.0%

6

79.2%

0.000

0.0%

      6

AVG

Median

19

155

-0.142

7.4%

6

95.00

7.70

-0.418

33.0%

6

38.1

-0.195

6.0%

6

2.08

0.128

-3.6%

6

83.0%

0.309

4.7%

      6

Median

Mode

19

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Mode

STD

2

87

1.000

52.1%

3.2

14.60

9.05

1.000

78.8%

3.2

12.4

1.000

30.7%

3.2

0.57

1.000

28.3%

3.2

12.1%

1.000

15.3%

   3.2

STD

25%

19

110

-0.655

-18.0%

4

90.45

5.53

-0.658

-45.0%

4

34.0

-0.529

-10.4%

4

1.64

-0.648

-9.2%

4

78.9%

-0.024

-0.4%

      4

 

75%

22

198

0.346

34.1%

9

104.75

16.65

0.570

51.9%

9

44.8

0.340

16.2%

9

2.20

0.327

18.4%

9

85.5%

0.518

7.9%

      9

 

 

***************************************************

Snow Storm #3 - Results Summary

 

SUMSQ:  sum of square errors

STP:  storm total precipitation

TAE:  total absolute error
AAE:  average absolute error

(number):  category rank

 

1st Place

 

emoran

SUMSQ:

79.18

 

SUMSQ Z:

-1.013

 

STP:

1.55

 (1)

TAE:

25.45

 (1)

AAE:

1.21

 (1)

 

For every inch of snow observed… 0.847” was forecast.  Forecast accounted for 88.0% of the observed snowfall/s variability.

 

 

2nd Place

 

donsutherland1

SUMSQ:

90.78

 

SUMSQ Z:

-0.880

 

STP:

6.80

 (5)

TAE:

25.90

 (2)

AAE:

1.36

 (2)

 

For every inch of snow observed …0.838” was forecast.  Forecast accounted for 87.0% of the observed snowfall/s variability.

 

 

3rd Place

 

Raven

SUMSQ:

101.45

 

SUMSQ Z:

-0.758

 

STP:

20.15

 (10)

TAE:

36.75

 (5)

AAE:

1.60

 (3)

 

For every inch of snow observed …0.996” was forecast.  Forecast accounted for 83.6% of the observed snowfall/s variability.

 

Honorable Mention

 

NYNJPAWeather

SUMSQ:

119.48

 

SUMSQ Z:

-0.551

 

STP:

2.70

 (2)

TAE:

32.00

 (3)

AAE:

1.68

 (4)

 

 For every inch of snow observed …0.842” was forecast.  Forecast accounted for 81.2% of the observed snowfall/s variability.

 

 

***************************************************

 

Station forecasts: 222

Average stations per forecaster:  20

Stations with observed snowfall:  20

 

Storm-total precipitation (STP), all stations:

Forecast

Minimum:  79” (Mitchel Volk)

Consensus Median: 95.0””

Maximum:  131 “ (Donald Rosenfeld)

 

Observed: 97.7””

            Max single station: 18.5” @ CAR

Shutout:  ACY IAD DCA SBY RIC ORF RDU

 

New Daily Records:
Seven new daily records were set on Sunday.

PWM - 14.5" (12.4"; '33)

CON - 10" (7.9"; '14)

BGR - 9.7" (7"; '95)

BTV - 9.1" (7.8"; '10)

ORH - 8" (6"; '54)

ALB - 6.6" (5.7"; 1887)

BDL - 5" (2.6"; '75)

 

Perfect Forecasts

Rank

Forecaster

'Perfect Forecast' Stations

bat avg

1

emoran

BDL PHL BWI

0.143

2

Mitchel Volk

CON

0.053

3

donsutherland1

 

0.000

3

Raven

 

0.000

3

NYNJPAWeather

 

0.000

3

Newa

 

0.000

3

TQ

 

0.000

3

Donald Rosenfeld

 

0.000

3

apisces1

 

0.000

3

ilibov

 

0.000

3

jackzig

 

0.000

 

Best Station Forecasts  (Batting Average - Percentage of Forecast Stations with Lowest Absolute Error)

Rank

Forecaster

'Lowest Error' Stations

TOT

bat avg

1

emoran

CAR BTV BDL MDT PHL BWI

6

0.286

2

donsutherland1

BDR ALB JFK ABE

4

0.211

3

TQ

HYA ISP

2

0.043

4

NYNJPAWeather

BGR BOS

2

0.105

4

Newa

ABE EWR

2

0.105

6

Donald Rosenfeld

ORH BGM

2

0.125

7

Mitchel Volk

CON

1

0.087

8

jackzig

PVD

1

0.000

9

Raven

PWM

1

0.053

10

apisces1

 

0

0.000

10

ilibov

 

0

0.048

 

Best Station Forecast Busts (Batting Average - Percentage of Forecast Stations with Highest Absolute Error)

Rank

Forecaster

'Highest Error' Stations

TOT

bat avg

1

jackzig

CAR BGR HYA BDR BGM ISP JFK ABE MDT ACY EWR

11

0.524

2

Donald Rosenfeld

BOS PVD PHL BWI IAD DCA

6

0.261

3

TQ

PWM BDL

2

0.125

4

Raven

CON ALB

2

0.087

5

NYNJPAWeather

BDL

1

0.053

5

Newa

BTV

1

0.053

5

Mitchel Volk

ORH

1

0.053

8

ilibov

ALB

1

0.043

9

emoran

 

0

0.000

9

donsutherland1

 

0

0.000

9

apisces1

 

0

0.000

 

***********************************

Congratulations to the Winners!

 

***********************************

Complete Results @ http://www.newx-forecasts.com/

Follow the link to 'Storm Forecasts – Snow Storm #3 to see the complete station forecast verification table.

 

Consensus forecast best @ BGR…CON…BTV…ALB…

MAX forecast best @ CAR…PWM

MAX forecast less than observed @ CAR

MIN forecasts best @ HYA…BGM…ISP…JFK…ABE…MDT…PHL…EWR

MIN forecasts more than observed @ ABE

 

Good association between SUMSQ and TAE Z-scores

 

*******************************

Verification:

Good data from CDUS41…PNS…and F6 bulletins

 

Rank

Station

Snow

SN:H2O

      1

CAR

 18.50

   13.6

      3

BGR

 11.20

   12.7

      2

PWM

 14.50

   24.6

      4

CON

 10.00

   17.9

      5

BTV

   9.10

   15.7

    10

BOS

   3.80

     7.5

    17

HYA

   0.05

 

      6

ORH

   8.00

   17.4

      9

PVD

   4.50

     7.9

    12

BDR

   1.00

 

      8

BDL

   5.00

   15.2

      7

ALB

   6.60

   19.4

    11

BGM

   3.10

   25.8

    16

ISP

   0.20

 

    15

JFK

   0.50

 

    14

ABE

   0.60

 

    17

MDT

   0.05

 

    17

PHL

   0.05

 

 

ACY

      -  

 

    13

EWR

   0.90

 

    17

BWI

   0.05

 

 

IAD

      -  

 

 

DCA

      -  

 

 

SBY

      -  

 

 

RIC

      -  

 

 

ORF

      -  

 

 

RDU

      -  

 

 

TOT

97.70

   16.1

 

SN:H2O @ PWM and CON estimates derived from METAR 6///// and P///// groups.

 

*******************************

Storm Notes

 

Surface Analysis

 

 

5H NHEMI

 

5H change

 

 

 

 

IR

 

VIS

 

 

Tele-connections

 

Five-day 5H anomaly height correlations

 

Five-day height error