NOAA National Upper-air Station Performance Scores

Objective

The performance score was devloped as an aid to help evaluate NWS upper-air station performance nationwide and improve data availability, quantity, and quality.

Method

The following equation is used to rank station performance, which includes appropriate weighting factors:

Score = A/2 + B + C + D/2 - E/5 - F/5   where,

A = Percentage of monthly soundings arriving at NCEP within 3 hours after balloon release (by 14:00 or 02:00 UTC). This is based on NCEP and FMH#3 requirements. To score in this category, all coded messages (with or without data) must be received. This percentage is divided by 2.

B = Percentage of monthly soundings achieving the minimum 400 hPa pressure level requirement or higher.

C = Percentage of monthly soundings achieving 50 hPa or higher.

D = Percentage of monthly soundings achieving 20 hPa or higher. This percentage is divided by 2.

E = Percentage of monthly temperature levels between surface & 400 hPa rejected by NCEP.  This percentage is divided by 5.

F = Percentage of monthly wind levels between 400 and 100 hPa rejected by NCEP. This percentage is divided by 5.

NOTE: Starting with the August, 1999, data, element "A" above now includes soundings with AND without data.  Prior to this change, points were only given in this element if the coded messages contained data. Messages without data (i.e., no sounding taken) were not included in this element. This change will result in slightly higher average scores.

Elements B through F are compiled 6 hours or more after balloon release and before NCEP data deletions are applied to the soundings.  The maximum score a station can achieve with this equation is 300.  Histograms are available that show station performance for some of the above elements

Data Sources

Data used for generating the scores come from data quality reports provided by NCEP each month. 

Evaluation

It is important to note that a station's score does not solely reflect station staff performance. Factors such as equipment and communication failures, maintenance personnel performance, and support from NWS Regional office and Headquarters management, must also be taken into consideration when evaluating station scores.   Furthermore, many times a low score is the result of a system failure (e.g., lightning strike) beyond the control of station staff.  Upper-air station managers should use the scores as only one of several tools for assessing how well their station is performing.

***IMPORTANT***

(1) Stations must not under inflate balloons in an attempt to reach higher sounding termination heights and a higher monthly score.  Likewise, over inflation of the balloon must be avoided as this wastes gas and can lower balloon burst heights.  Routine under inflation and over inflation of the balloon is unacceptable.   Stations should review balloon ascension rate graphics based on the National Climatic Data Center (NCDC) archive and adjust the balloon gas amounts accordingly.  NWS stations should have no more than 5 soundings a month ascend outside the range of 275 to 350 meters/minute (average from surface to flight termination)

(2) Stations must not disseminate poor quality soundings that should have been terminated early or not even transmitted.   Dissemination of such soundings can erroneously increase the monthly score and is unacceptable for NWS operations.  Station staff should review the monthly NCEP Super-adiabatic Lapse Rate Report and other data to help identify poor quality soundings and take corrective action.

NWS upper-air station scores for the past 3 months and the 12 month running average.

300  =  Perfect Score.   Click here for trends in the National average and median score.

ID

Nov Score

ID

Dec Score

ID

Jan Score

ID

12 Month Avg

BOI

299.99

ANN

300.00

OTX

300.00

ITO

297.78

UNR

299.92

EPZ

299.61

BOI

299.99

TFX

297.69

BIS

299.84

TWC

299.01

BUF

299.98

LIH

297.13

LKN

299.51

SJU

298.39

LIH

299.92

DTX

297.11

NKX

299.11

OAK

298.35

AMA

299.90

BUF

297.09

OAK

299.08

BIS

298.31

LBF

299.86

BOI

297.07

MFR

298.81

ABR

298.23

ITO

299.75

ABR

296.94

OTX

298.29

ITO

297.95

EPZ

299.74

NKX

296.89

GGW

298.21

GJT

297.67

GJT

299.28

MHX

296.86

ANN

298.19

TAE

297.50

DTX

299.17

APX

296.82

ITO

298.18

MHX

297.47

APX

299.16

LBF

296.78

DDC

298.16

AFG

297.18

OKX

299.12

SLE

296.78

GJT

297.92

RIW

296.82

CRP

299.10

AFG

296.71

BUF

297.48

INL

296.73

YAP

299.02

MFR

296.65

SLE

297.44

NKX

296.69

ROR

298.99

DNR

296.65

LWX

297.44

TFX

296.69

TOP

298.32

GYX

296.60

AFC

297.42

MAF

296.54

SLC

297.50

GJT

296.60

MCG

297.42

UNR

296.53

UNR

297.42

MCG

296.55

OME

297.38

BRW

295.95

DRT

297.41

OHX

296.44

LIH

297.35

AKN

295.94

RIW

297.30

OAK

296.41

DNR

297.32

CDB

295.94

MPX

296.74

OTX

296.26

AFG

297.26

FGZ

295.93

ABR

296.74

ANN

296.18

OHX

297.16

OTX

295.85

GRB

296.73

ABQ

295.95

JAX

296.67

BOI

295.82

FWD

296.72

PBZ

295.80

MHX

296.64

GGW

295.81

ILX

296.71

DDC

295.71

INL

296.63

BUF

295.74

OHX

296.66

SGF

295.65

AKN

296.63

TBW

295.38

JAX

296.60

AFC

295.60

ADQ

296.59

AFC

295.12

WAL

296.46

LCH

295.60

TFX

296.58

GYX

295.08

ILN

295.97

BRW

295.47

ILN

296.57

OAX

295.08

PBZ

295.97

RIW

295.45

DRT

296.51

MFR

295.07

DVN

295.95

OKX

295.44

PBZ

296.51

ADQ

295.07

OAX

295.93

SLC

295.41

CRP

295.82

SLC

295.02

MFL

295.91

MAF

295.40

ABR

295.77

DTX

295.00

LIX

295.91

DRT

295.29

MAF

295.67

LIH

294.70

NKX

295.90

OAX

295.20

OKX

295.61

LCH

294.33

BIS

295.90

EPZ

295.16

CHS

295.59

APX

294.28

LWX

295.90

LKN

295.05

SLC

294.93

YAK

294.26

LZK

295.90

ADQ

294.95

VEF

294.69

ABQ

294.11

TFX

295.83

LIX

294.79

APX

294.17

CAR

293.51

MAF

295.81

CRP

294.48

MFL

294.14

RNK

293.44

YAK

295.79

INL

294.21

BRO

294.11

CHS

293.43

DDC

295.79

RNK

293.94

ABQ

294.09

TOP

293.36

TWC

295.34

ILX

293.92

GSO

294.06

MCG

293.31

GYX

295.16

AMA

293.87

BMX

293.97

MPX

292.67

SLE

295.13

ILN

293.86

LBF

293.95

DDC

292.54

GSO

295.06

GSO

293.79

WAL

293.94

DNR

292.43

MHX

295.05

AKN

293.78

RIW

293.92

PBZ

292.37

OAK

295.02

TOP

293.77

FGZ

293.62

WAL

292.34

DNR

294.99

JAX

293.76

LIX

293.33

PNI

292.27

PPG

294.81

LWX

293.74

TKK

293.32

DVN

291.84

MCG

294.58

LZK

293.68

FWD

293.25

DRT

291.82

GUM

294.35

MPX

293.65

LCH

293.22

SLE

291.74

CHS

294.31

FGZ

293.59

RNK

293.06

ILN

291.68

VEF

294.31

SHV

293.49

GYX

292.48

YAP

291.08

INL

294.25

GGW

293.31

DVN

292.45

JAX

291.02

ABQ

294.22

CHH

293.31

AMA

292.37

LBF

290.87

REV

294.07

SJU

293.30

TWC

292.03

TKK

290.32

GGW

293.90

WAL

293.01

GRB

291.65

BRO

290.26

FGZ

293.80

UNR

292.94

SHV

291.55

GSO

290.22

SGF

293.55

TBW

292.84

TOP

291.45

OKX

289.40

AKN

293.55

REV

292.70

BRW

290.80

OHX

289.38

UIL

293.55

FWD

292.35

ROR

290.78

CRP

289.26

BMX

293.50

BRO

292.32

SGF

290.77

MFL

288.71

TKK

293.47

BIS

292.27

CHH

290.73

LIX

288.59

RNK

293.33

YAK

292.10

YAK

290.70

LWX

288.58

CDB

292.74

DVN

292.00

PNI

289.81

ILX

288.52

AFC

291.94

BMX

291.97

MAJ

289.09

MAJ

288.40

LCH

291.92

MFL

291.97

YAP

288.33

PPG

288.24

MAJ

291.77

JAN

291.61

DTX

288.31

FWD

288.22

ANN

291.12

GRB

291.08

OAX

288.30

CHH

286.99

BRO

290.94

VEF

290.62

TAE

288.23

SGF

286.89

AFG

290.52

SNP

290.50

KEY

287.48

ROR

286.89

KEY

290.32

ROR

290.08

MPX

287.48

LZK

286.89

FFC

290.10

TLH

290.01

TBW

287.41

GRB

286.41

SHV

289.89

CHS

289.29

SJU

286.64

SNP

285.48

OUN

289.46

CDB

289.28

GUM

285.83

KEY

285.45

TAE

289.24

CAR

289.20

LZK

285.81

OTZ

283.85

OME

288.70

BET

289.18

EPZ

284.70

SHV

283.73

OTZ

288.69

FFC

289.02

REV

284.01

AMA

283.71

BRW

288.68

OME

288.89

BET

283.33

JAN

282.94

TBW

288.68

KEY

288.80

UIL

283.20

BMX

282.82

BET

288.67

TWC

288.14

PPG

282.01

VEF

280.39

JAN

288.63

OUN

287.75

CAR

281.64

OUN

279.42

MFR

287.79

OTZ

287.38

FFC

281.00

GUM

279.03

ALY

287.78

GUM

286.50

OUN

280.66

LKN

275.10

SNP

287.07

PPG

286.07

JAN

276.54

REV

273.14

CAR

286.27

YAP

285.70

CDB

275.82

FFC

271.48

SJU

284.68

UIL

283.58

ALY

271.52

BET

264.48

CHH

284.67

TKK

279.91

ILX

269.94

ALY

259.36

PNI

281.74

ALY

277.79

SNP

260.00

OME

249.96

LKN

279.86

MAJ

270.85

OTZ

254.14

UIL

182.72

ADQ

279.14

PNI

269.48

Nat'l Avg

291.54

Nat'l Avg

289.31

Nat'l Avg

293.99

 

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