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

Jan Rank

ID

Feb Rank

ID

Mar Rank

ID

12 Month Avg

AKN

299.93

BRO

299.99

AFC

300.00

MAF

298.40

BET

299.92

CDB

299.98

OAK

299.98

OTX

297.87

ABQ

299.73

ANN

299.97

MPX

299.98

LIH

297.69

EPZ

299.59

CRP

299.93

ANN

299.98

AFC

297.61

TWC

299.42

DRT

299.83

GGW

299.95

BOI

297.58

BOI

299.37

LKN

299.81

ABQ

299.95

BRO

297.10

SNP

299.19

SHV

299.79

MAF

299.91

DRT

296.36

ANN

299.16

EPZ

299.66

MCG

299.87

RNK

296.35

OTX

299.13

GJT

299.64

DNR

299.79

DTX

296.32

VEF

299.04

PBZ

299.11

DRT

299.78

ABQ

296.31

MAF

299.01

OTX

299.11

OAX

299.19

EPZ

296.20

BRW

298.96

MFL

299.11

BRO

299.18

ABR

295.89

OAK

298.89

KEY

299.11

LWX

299.18

ILN

295.70

SJU

298.37

OAX

299.07

OTZ

299.12

SLE

295.68

LZK

298.27

OAK

299.03

YAK

299.09

LKN

295.53

OAX

298.25

FWD

299.03

LKN

298.88

NKX

295.53

MCG

298.19

RNK

298.91

BIS

298.39

FWD

295.46

REV

298.15

MAF

298.82

BOI

298.37

SLC

295.31

FWD

297.48

GSO

298.16

DTX

298.37

OHX

295.29

JAN

297.33

TOP

298.14

MFR

298.36

JAN

295.22

AFC

297.32

LZK

298.12

ITO

298.24

ANN

295.07

SLC

297.31

BRW

298.03

LBF

298.22

TFX

295.01

MFR

296.85

INL

297.32

INL

297.95

LZK

294.98

ABR

296.77

SNP

297.31

RIW

297.88

VEF

294.96

CRP

296.74

JAX

297.30

TBW

297.58

GSO

294.93

SHV

296.73

BOI

297.28

GRB

297.57

MFR

294.87

RIW

296.72

LWX

297.26

MHX

297.48

BET

294.79

TOP

296.68

ITO

297.22

VEF

297.41

GGW

294.75

AMA

296.61

YAK

297.10

MFL

297.26

MHX

294.72

TBW

295.94

TWC

297.03

FWD

297.22

ITO

294.72

DTX

295.94

GUM

296.37

GJT

297.05

GJT

294.71

GSO

295.88

LCH

296.37

JAN

296.75

OKX

294.60

TFX

295.82

MFR

296.35

ILN

296.73

TOP

294.56

GRB

295.16

ABQ

296.34

OHX

296.68

OAK

294.42

BRO

295.15

NKX

296.29

DDC

296.63

AMA

294.35

ILN

295.14

LBF

296.23

AFG

296.58

INL

294.35

MPX

295.12

CHS

296.19

FGZ

296.20

TWC

294.25

RNK

295.12

JAN

296.09

PBZ

295.97

SNP

294.14

LIH

295.05

SJU

295.54

BUF

295.97

TBW

294.11

NKX

295.00

ILN

295.54

CHH

295.95

OAX

293.86

SGF

294.34

DTX

295.54

RNK

295.92

BMX

293.84

SLE

294.22

OKX

295.47

CRP

295.87

SJU

293.78

CHH

294.18

LIH

295.39

BRW

295.81

MPX

293.56

MAJ

294.16

SLC

295.23

LIH

295.68

LWX

293.53

ITO

293.93

TFX

295.21

DVN

295.16

AFG

293.52

CDB

293.55

FGZ

294.95

SNP

295.15

CRP

293.52

DRT

293.49

DNR

294.73

OTX

295.15

REV

293.48

OHX

293.49

TBW

294.64

ROR

295.11

AKN

293.30

DVN

293.48

MPX

294.64

ABR

295.11

RIW

293.27

MHX

293.48

MAJ

294.64

SHV

294.98

ILX

293.27

INL

292.73

ABR

294.62

SJU

294.35

PBZ

293.07

CAR

292.70

AKN

293.72

OME

294.33

DDC

293.01

LKN

292.56

BIS

293.70

GUM

294.33

SGF

292.88

KEY

291.86

BUF

292.86

AKN

294.32

FGZ

292.62

DDC

291.80

SGF

292.83

SLE

294.29

KEY

292.59

DNR

291.50

SLE

292.57

GSO

294.25

SHV

292.42

GJT

291.44

AMA

292.55

JAX

294.24

CHS

292.38

APX

291.13

ROR

292.47

SLC

293.92

LCH

292.28

LCH

291.07

PNI

291.96

TOP

293.55

LBF

292.05

ADQ

290.98

BET

291.96

TKK

293.48

JAX

292.03

LBF

290.76

AFC

291.95

OKX

293.48

DNR

291.84

PBZ

290.26

OUN

291.85

BMX

293.47

LIX

291.68

JAX

289.52

YAP

291.81

LCH

292.68

OME

291.63

ALY

289.42

MCG

291.72

EPZ

292.52

BUF

291.58

OKX

289.42

CAR

291.02

KEY

291.94

FFC

291.17

OME

288.66

MHX

290.93

NKX

291.92

DVN

291.13

GGW

287.86

BMX

290.72

OUN

291.07

APX

291.05

AFG

286.66

PPG

290.18

TWC

291.01

CAR

291.03

FGZ

286.48

CHH

290.18

CDB

290.32

MFL

290.70

MFL

286.29

GGW

290.04

LZK

290.32

ADQ

290.59

BUF

286.26

LIX

290.03

ILX

290.29

WAL

290.45

LWX

286.25

AFG

289.95

PNI

290.14

YAK

289.61

BMX

286.24

OHX

289.92

WAL

290.08

BIS

289.57

ROR

286.15

WAL

289.76

TFX

289.85

OUN

288.82

BIS

285.47

GRB

289.26

REV

288.66

MAJ

288.77

CHS

285.33

DDC

289.18

AMA

288.63

GRB

288.65

OUN

284.56

VEF

289.11

UIL

287.83

BRW

288.20

UNR

284.49

GYX

288.39

BET

287.10

TKK

288.01

ILX

283.03

APX

288.39

CHS

286.27

PPG

287.59

OTZ

282.98

TAE

288.13

APX

286.25

GUM

287.34

LIX

282.11

REV

288.03

LIX

285.75

ROR

287.12

YAP

282.04

OTZ

287.41

ALY

283.84

GYX

287.11

UIL

281.34

ADQ

286.98

FFC

283.77

PNI

287.00

TKK

280.65

OME

285.71

UNR

283.51

CHH

286.75

YAK

280.35

UIL

285.71

GYX

282.22

UIL

286.66

PNI

280.10

FFC

285.23

TAE

281.31

ALY

286.65

GUM

279.71

ILX

283.85

ADQ

280.50

UNR

286.31

PPG

278.18

ALY

282.99

PPG

279.82

TLH

282.18

FFC

276.43

RIW

282.68

SGF

279.78

MCG

281.86

GYX

275.51

DVN

279.38

CAR

277.39

OTZ

278.44

WAL

272.42

UNR

275.84

MAJ

274.62

YAP

277.99

TAE

237.82

TKK

272.88

YAP

199.71

CDB

272.63

Nat'l Avg

291.27

Nat'l Avg

293.48

Nat'l Avg

292.61

 

 

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