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

Jun Rank

ID

Jul Rank

ID

Aug Rank

ID

12 Month Avg

MHX

300.00

BRW

300.00

BRW

300.00

MFR

298.89

BET

300.00

BMX

300.00

AKN

300.00

AFC

298.01

AFC

300.00

AFC

300.00

CDB

299.99

INL

297.60

OKX

299.99

UIL

299.98

DDC

299.99

RNK

297.20

CHS

299.98

BUF

299.98

INL

299.98

ABQ

297.18

TFX

299.97

MAF

299.96

APX

299.97

BRO

297.07

ABQ

299.96

NKX

299.96

SHV

299.96

DRT

296.91

GSO

299.94

MFR

299.86

SLE

299.94

OTX

296.86

ILN

299.92

OKX

299.19

NKX

299.92

ITO

296.84

LIH

299.91

SLE

299.18

BOI

299.91

MAF

296.84

OAK

299.89

CHH

299.17

RIW

299.90

GJT

296.75

CHH

299.89

TFX

299.16

DVN

299.89

BOI

296.68

MFR

299.78

SNP

299.16

LIX

299.82

SLE

296.62

EPZ

299.77

LWX

299.14

MFR

299.78

DTX

296.21

REV

299.69

ABQ

299.12

ITO

299.40

NKX

296.15

JAN

299.67

CAR

299.10

MCG

299.19

EPZ

296.15

ITO

299.58

REV

299.03

BET

299.19

TBW

296.12

GUM

299.17

ITO

298.96

AFC

299.19

ILN

296.03

BOI

299.17

LIH

298.91

BUF

299.17

ABR

295.98

MCG

299.17

TBW

298.38

SNP

299.17

OAK

295.96

TAE

299.15

FWD

298.37

OAX

299.16

TFX

295.88

NKX

299.13

SLC

298.37

LCH

299.14

TOP

295.79

VEF

299.08

RNK

298.35

CHH

298.35

SLC

295.71

DNR

299.05

RIW

298.20

TFX

298.30

OHX

295.68

OHX

299.01

CDB

298.03

REV

298.13

SJU

295.67

TOP

298.95

GJT

297.65

SLC

297.90

GSO

295.48

ABR

298.82

ILX

297.57

ABQ

297.56

BET

295.45

LKN

298.52

SJU

297.56

CAR

297.54

LKN

295.37

CRP

298.33

CRP

297.54

OKX

297.50

ANN

295.33

CAR

298.33

BOI

297.54

BMX

297.49

OKX

295.32

MAF

298.29

BET

297.52

TOP

297.48

CRP

295.02

OTX

298.27

UNR

297.50

OTX

297.42

FWD

295.02

SLE

298.10

AFG

297.25

JAX

297.42

BRW

295.01

GJT

298.06

ANN

296.77

PPG

296.98

REV

294.98

OUN

297.90

DRT

296.76

GRB

296.74

LWX

294.98

PBZ

297.50

DNR

296.73

LWX

296.73

OAX

294.96

OTZ

297.50

PPG

296.70

SJU

296.72

TWC

294.88

GYX

297.44

OHX

296.69

TBW

296.70

VEF

294.81

LWX

297.43

DTX

296.65

RNK

296.61

MHX

294.66

SGF

297.37

BRO

295.97

SGF

295.85

RIW

294.64

BRO

296.67

MHX

295.96

FFC

295.81

DDC

294.63

MFL

296.65

GSO

295.96

OTZ

295.16

LIH

294.51

YAK

296.64

INL

295.91

OHX

295.14

BMX

294.46

INL

296.63

LCH

295.90

LZK

295.12

SHV

294.29

SNP

296.59

MPX

295.89

ANN

295.10

SNP

294.28

FGZ

296.56

GRB

295.85

VEF

294.93

JAN

294.26

SHV

296.48

LBF

295.82

KEY

294.35

CHS

294.25

FFC

295.83

MCG

295.15

MFL

294.35

AKN

294.24

BRW

295.82

JAX

295.14

PBZ

294.33

AFG

294.05

BIS

295.76

ABR

295.09

ABR

294.29

DNR

294.00

DTX

295.76

JAN

295.08

UIL

294.27

KEY

293.77

WAL

295.70

TWC

295.05

ILX

294.26

JAX

293.68

GGW

295.59

ILN

294.97

MHX

293.54

GGW

293.66

CDB

295.00

TOP

294.95

GUM

293.48

LZK

293.62

ALY

294.98

CHS

294.34

DNR

293.44

PBZ

293.61

AMA

294.96

KEY

294.33

AMA

293.38

MFL

293.54

SJU

294.96

EPZ

294.30

LIH

293.22

ILX

293.51

TBW

294.95

SHV

294.28

GYX

292.74

MPX

293.31

ILX

294.77

OTZ

294.24

BRO

292.73

AMA

292.98

PPG

294.64

GGW

294.13

DRT

292.65

SGF

292.97

GRB

294.34

OAX

294.13

BIS

292.55

MCG

292.74

KEY

294.17

LKN

293.93

GSO

291.92

LCH

292.72

RNK

294.17

LZK

293.53

FWD

291.91

CAR

292.57

DRT

294.17

AKN

293.49

GJT

291.53

BUF

292.18

SLC

294.07

FFC

293.43

OAK

291.43

BIS

292.18

APX

294.01

LIX

292.68

MPX

291.08

GRB

292.03

ADQ

293.79

OTX

292.61

LBF

290.93

APX

291.84

JAX

293.33

AMA

292.58

LKN

290.51

YAK

291.69

AFG

293.32

OAK

292.43

ILN

290.21

LBF

291.55

LCH

293.31

OME

291.94

MAF

289.52

LIX

290.73

RIW

293.10

GYX

291.13

CRP

289.50

DVN

290.52

UIL

292.50

TAE

291.12

EPZ

289.38

WAL

290.27

LIX

291.67

MFL

291.11

YAK

288.57

FGZ

289.93

OAX

291.48

BIS

290.93

TWC

287.57

CHH

289.69

DDC

291.34

DDC

290.32

DTX

287.08

ALY

288.93

UNR

291.32

YAK

290.30

AFG

286.98

UIL

288.83

ANN

290.83

ALY

289.47

CHS

286.29

GUM

288.80

BUF

290.75

WAL

287.81

WAL

286.26

OUN

288.51

OME

289.17

ADQ

286.63

ALY

286.23

OTZ

288.49

DVN

289.05

APX

286.26

TAE

286.16

ADQ

288.46

BMX

288.31

PBZ

285.91

ROR

286.06

FFC

288.43

TWC

288.30

GUM

285.42

GGW

284.63

ROR

288.14

ROR

287.50

DVN

284.55

ADQ

283.38

GYX

288.08

AKN

287.45

ROR

284.24

FGZ

282.53

OME

286.58

MPX

285.29

SGF

283.85

MAJ

282.29

PPG

286.22

MAJ

285.00

YAP

282.17

JAN

282.19

MAJ

285.76

FWD

284.89

MAJ

278.94

YAP

278.94

CDB

285.48

LZK

284.38

TKK

270.01

OUN

272.48

TLH

283.75

LBF

282.58

VEF

267.72

UNR

270.93

UNR

282.15

YAP

265.40

FGZ

265.60

OME

233.81

YAP

272.22

PNI

234.17

OUN

265.30

PNI

211.88

PNI

268.69

TKK

219.93

PNI

197.51

TKK

73.39

TKK

257.13

Nat'l Avg

293.69

Nat'l Avg

292.56

Nat'l Avg

289.72

 

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