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

Aug Rank

ID

Sep Score

ID

Oct Score

ID

12 Month Avg

BRW

300.00

OTZ

300.00

OHX

300.00

MFR

298.69

AKN

300.00

BIS

299.94

DVN

300.00

ABQ

298.11

CDB

299.99

GSO

299.94

AFG

300.00

DRT

297.32

DDC

299.99

NKX

299.89

DRT

299.99

OTX

297.23

INL

299.98

OTX

299.83

FFC

299.98

AFC

297.19

APX

299.97

RIW

299.71

ILN

299.98

BRO

297.14

SHV

299.96

ILN

299.17

BOI

299.98

GJT

297.01

SLE

299.94

BET

299.17

NKX

299.96

INL

296.98

NKX

299.92

ANN

299.17

MAF

299.94

OAK

296.92

BOI

299.91

ABQ

299.17

ILX

299.93

SLE

296.79

RIW

299.90

UIL

299.14

MHX

299.89

BOI

296.76

DVN

299.89

CDB

299.14

DDC

299.88

NKX

296.76

LIX

299.82

EPZ

299.10

MFR

299.86

SHV

296.56

MFR

299.78

OUN

299.10

BRO

299.18

RNK

296.51

ITO

299.40

PBZ

299.09

OTX

299.18

LKN

296.44

MCG

299.19

ITO

299.07

INL

299.16

EPZ

296.43

BET

299.19

GGW

299.00

BMX

299.15

SJU

296.41

AFC

299.19

LIH

298.79

UIL

299.13

MAF

296.35

BUF

299.17

LKN

298.59

GJT

299.00

BET

296.26

SNP

299.17

CRP

298.31

OAK

298.98

ILN

296.24

OAX

299.16

BRO

298.31

CHS

298.38

ITO

296.14

LCH

299.14

ABR

298.31

TFX

298.37

ABR

296.14

CHH

298.35

SJU

298.23

LKN

298.35

CRP

296.10

TFX

298.30

SHV

297.50

ABQ

298.30

GSO

296.02

REV

298.13

LIX

297.50

SGF

298.24

TOP

295.94

SLC

297.90

LCH

297.50

TOP

298.21

TFX

295.75

ABQ

297.56

BRW

297.50

OTZ

297.58

ANN

295.66

CAR

297.54

DRT

297.48

CRP

297.58

SLC

295.66

OKX

297.50

SLE

297.46

BET

297.58

LWX

295.59

BMX

297.49

AFG

297.44

MCG

297.57

REV

295.53

TOP

297.48

OAK

297.38

BRW

297.55

CHH

295.52

OTX

297.42

MFR

297.28

JAX

297.54

BRW

295.50

JAX

297.42

LWX

296.67

FGZ

297.53

RIW

295.47

PPG

296.98

TAE

296.67

FWD

297.52

OAX

295.46

GRB

296.74

MFL

296.65

OKX

297.43

DTX

295.46

LWX

296.73

SGF

296.65

RNK

297.42

OHX

295.20

SJU

296.72

OAX

296.64

LIH

297.39

SNP

295.17

TBW

296.70

AMA

296.64

SLC

297.29

MHX

295.14

RNK

296.61

TFX

296.63

GYX

296.77

TBW

295.08

SGF

295.85

BUF

296.59

DTX

296.77

FWD

294.95

FFC

295.81

FFC

296.49

GSO

296.74

OKX

294.78

OTZ

295.16

SLC

296.12

LZK

296.72

DDC

294.69

OHX

295.14

DDC

295.83

SNP

296.69

LIH

294.47

LZK

295.12

UNR

295.73

GRB

296.64

BMX

294.47

ANN

295.10

REV

295.67

BIS

296.59

CDB

294.27

VEF

294.93

PPG

295.56

BUF

295.96

JAN

294.24

KEY

294.35

GJT

295.43

APX

295.93

AFG

294.19

MFL

294.35

TWC

295.00

SLE

295.93

GRB

294.14

PBZ

294.33

BMX

295.00

PBZ

295.90

JAX

293.89

ABR

294.29

MCG

294.98

SHV

295.88

ILX

293.88

UIL

294.27

BOI

294.96

LWX

295.84

TWC

293.88

ILX

294.26

JAN

294.72

RIW

295.65

GGW

293.87

MHX

293.54

SNP

294.35

SJU

295.16

VEF

293.78

GUM

293.48

MPX

294.17

MFL

295.16

PBZ

293.77

DNR

293.44

GYX

294.17

TAE

295.14

BUF

293.70

AMA

293.38

MAF

294.17

OAX

295.14

CHS

293.61

LIH

293.22

TOP

294.16

OME

295.13

AKN

293.45

GYX

292.74

FWD

294.14

VEF

295.05

DNR

293.44

BRO

292.73

AKN

294.14

ANN

294.80

MFL

293.42

DRT

292.65

LBF

293.98

CAR

294.35

LCH

293.42

BIS

292.55

APX

293.33

ABR

294.31

LZK

293.26

GSO

291.92

OME

293.31

JAN

294.30

SGF

293.16

FWD

291.91

RNK

293.30

MPX

294.29

MPX

293.06

GJT

291.53

OKX

293.25

DNR

294.25

KEY

293.03

OAK

291.43

CHH

293.22

AMA

294.21

MCG

293.01

MPX

291.08

OHX

292.50

KEY

293.51

AMA

292.73

LBF

290.93

AFC

292.50

GGW

293.43

BIS

292.73

LKN

290.51

ILX

292.30

TBW

293.42

DVN

292.10

ILN

290.21

FGZ

291.92

WAL

293.26

CAR

291.96

MAF

289.52

MHX

291.67

EPZ

293.25

APX

291.71

CRP

289.50

DVN

291.67

PPG

293.02

OTZ

290.87

EPZ

289.38

DTX

291.67

LIX

292.70

LIX

290.82

YAK

288.57

CAR

291.67

AFC

292.70

UIL

290.60

TWC

287.57

LZK

291.61

CHH

291.94

FGZ

290.60

DTX

287.08

VEF

290.00

TWC

291.85

LBF

290.45

AFG

286.98

JAX

289.96

OUN

291.75

GYX

290.00

CHS

286.29

GRB

289.70

LCH

291.13

WAL

289.31

WAL

286.26

INL

289.17

REV

290.81

FFC

288.61

ALY

286.23

CHS

288.98

PNI

290.79

OUN

288.49

TAE

286.16

WAL

288.50

MAJ

290.29

ROR

288.31

ROR

286.06

ALY

288.28

CDB

290.25

ADQ

287.82

GGW

284.63

KEY

286.67

ADQ

289.92

YAK

287.69

ADQ

283.38

ADQ

286.57

ROR

288.45

ALY

287.62

FGZ

282.53

PNI

284.74

ITO

286.86

OME

286.99

MAJ

282.29

DNR

283.25

LBF

286.80

PPG

286.81

JAN

282.19

ROR

282.41

YAK

282.97

MAJ

284.49

YAP

278.94

MAJ

282.34

GUM

282.26

TLH

283.55

OUN

272.48

TBW

281.58

YAP

281.31

UNR

283.32

UNR

270.93

TKK

277.70

UNR

279.63

GUM

277.62

OME

233.81

YAK

251.32

ALY

277.96

PNI

269.77

PNI

211.88

YAP

205.00

AKN

274.99

YAP

267.16

TKK

73.39

GUM

140.73

TKK

269.86

TKK

254.71

Nat'l Avg

289.72

Nat'l Avg

291.41

Nat'l Avg

294.65

 

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