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

SLC

299.96

SJU

300.00

BOI

299.99

MCG

298.30

AKN

299.92

BRO

299.97

ABR

299.91

ABQ

297.78

MCG

299.51

OAX

299.96

TBW

299.90

BRW

297.75

ABR

299.19

TFX

299.93

GGW

299.89

BRO

297.60

TBW

299.07

ILX

299.90

EPZ

299.87

MFR

297.52

REV

299.06

AFG

299.60

DNR

299.85

GJT

297.42

LIH

298.33

DTX

299.11

TOP

299.85

NKX

297.39

NKX

298.28

LIH

299.08

YAP

299.59

AFC

297.04

OTZ

298.20

OKX

299.01

APX

299.19

TFX

297.04

EPZ

298.16

SHV

298.91

ILX

299.16

OHX

297.03

BRW

298.13

ITO

298.87

MCG

299.07

LKN

296.98

GJT

297.97

DRT

298.84

OHX

299.07

ILX

296.97

CHH

297.58

MCG

298.81

MFR

299.04

ABR

296.95

CAR

297.56

LKN

298.68

LBF

298.85

ILN

296.94

AFC

297.56

GJT

298.68

AFC

298.39

OTX

296.79

SJU

297.19

MFL

298.19

PBZ

298.37

DRT

296.76

LWX

296.77

MPX

298.19

OAX

298.36

EPZ

296.70

SLE

296.76

ILN

298.18

BUF

298.36

ITO

296.65

BET

296.72

SGF

298.08

LCH

298.33

REV

296.61

AMA

296.68

REV

298.03

RNK

298.11

INL

296.45

ABQ

296.66

DNR

297.93

RIW

298.04

SLE

296.42

LKN

296.29

MAF

297.84

LKN

297.65

BOI

296.38

ADQ

296.19

PBZ

297.32

YAK

297.58

TOP

296.35

AFG

296.13

BUF

297.27

ANN

297.58

RNK

295.92

DVN

295.97

SLC

297.26

OTX

297.56

MAF

295.88

MFL

295.97

BRW

297.26

JAX

297.55

BUF

295.85

FWD

295.91

JAN

297.22

ABQ

297.51

SJU

295.78

BRO

295.82

OHX

297.21

MHX

297.46

AFG

295.72

VEF

295.79

ABR

297.18

NKX

297.46

LWX

295.72

DRT

295.77

TBW

297.17

BIS

297.40

SLC

295.68

DTX

295.16

DDC

297.16

MFL

296.75

SHV

295.37

APX

295.12

LBF

297.01

REV

296.74

PBZ

295.34

ITO

295.01

EPZ

296.95

SLE

296.72

TBW

295.32

BOI

294.98

GYX

296.43

TFX

296.67

OAX

295.26

PBZ

294.35

AFC

296.43

BMX

296.66

OTZ

295.20

ILN

294.35

CHH

296.42

MAF

296.57

RIW

295.10

BUF

294.35

ADQ

296.34

OAK

295.97

BMX

295.03

GRB

294.35

GUM

296.31

SJU

295.93

CHH

294.97

CRP

294.33

YAK

296.30

ILN

295.84

OKX

294.94

OAX

294.31

ABQ

296.17

TAE

295.66

SNP

294.68

OAK

294.30

OTX

295.54

GJT

295.56

ANN

294.66

JAN

294.28

APX

295.52

GYX

295.16

CRP

294.63

MAF

294.28

CRP

295.49

GSO

295.16

APX

294.62

OUN

294.26

OME

295.39

DVN

295.13

GSO

294.59

UIL

293.54

OAK

294.61

INL

295.13

SGF

294.53

ILX

293.53

INL

294.61

BRO

295.12

DTX

294.52

BIS

293.52

AMA

294.49

LIX

295.11

LCH

294.36

TOP

293.48

CAR

293.73

OKX

295.10

MHX

294.28

ROR

293.48

LIX

293.69

SGF

295.08

UIL

294.17

MAJ

293.48

BET

293.69

VEF

295.05

JAX

294.03

OTX

293.46

OUN

293.68

LWX

295.04

BIS

293.96

RIW

292.83

RNK

293.62

OUN

295.00

DDC

293.87

LCH

292.73

BMX

293.60

LIH

294.96

FWD

293.80

INL

292.72

TOP

292.83

AMA

294.93

AMA

293.78

UNR

292.62

BOI

292.80

FFC

294.91

LIX

293.73

FGZ

292.13

LZK

292.78

DTX

294.35

MFL

293.70

OHX

291.93

JAX

292.76

BET

294.35

GYX

293.65

SGF

291.78

SLE

291.94

GRB

294.33

GRB

293.57

DNR

291.57

LCH

291.92

JAN

293.80

LIH

293.50

JAX

291.06

AKN

291.90

DRT

293.55

JAN

293.43

GGW

291.05

ANN

291.89

BRW

293.49

OAK

293.23

RNK

291.02

CDB

291.01

FWD

292.54

TLH

293.22

TAE

290.85

MFR

290.98

FGZ

291.96

MPX

292.90

SNP

290.32

MAJ

290.97

ROR

291.94

LZK

292.86

GUM

290.30

UIL

290.94

MPX

291.94

BET

292.83

GSO

290.28

SNP

290.18

UIL

291.86

DVN

292.78

LZK

290.20

TAE

290.06

SHV

291.82

CAR

292.58

CDB

289.49

FWD

289.86

AFG

291.80

DNR

292.17

LIX

289.46

RIW

289.75

KEY

291.13

GGW

291.95

ANN

289.39

PPG

289.29

CHH

291.11

CDB

291.36

SHV

288.71

LWX

289.18

WAL

291.02

CHS

291.05

MHX

288.68

NKX

289.15

PPG

290.33

FGZ

290.80

MPX

287.89

MHX

289.11

CRP

290.27

KEY

290.08

BMX

287.78

BIS

287.45

LZK

290.24

AKN

290.06

MFR

287.61

FGZ

286.77

CHS

290.21

ADQ

289.75

LBF

287.54

GSO

285.71

DDC

290.15

OUN

289.48

GYX

287.10

ALY

283.04

ITO

289.93

LBF

288.85

OME

286.95

UNR

282.94

SNP

289.52

VEF

288.84

CHS

287.00

OTZ

282.06

AKN

289.52

TWC

287.76

YAP

286.93

WAL

281.25

GUM

288.71

PPG

287.75

OKX

286.27

GRB

279.38

OTZ

288.52

WAL

287.74

TFX

284.36

TWC

279.14

CAR

287.90

YAK

287.53

KEY

283.87

PNI

277.45

ADQ

287.48

OME

286.80

DDC

283.73

KEY

276.66

SLC

286.24

FFC

285.82

YAK

283.68

ROR

274.77

OME

286.23

MAJ

285.47

TKK

282.90

YAP

274.65

UNR

285.39

ROR

285.36

WAL

282.86

CHS

273.91

TKK

281.96

ALY

283.62

TWC

282.14

DVN

269.59

ALY

281.38

UNR

283.20

FFC

279.74

VEF

269.49

MAJ

277.63

GUM

278.64

PPG

276.16

GGW

266.79

TWC

275.59

YAP

274.64

ALY

275.00

FFC

257.83

CDB

262.90

PNI

251.78

PNI

235.23

TKK

217.58

PNI

240.15

TKK

248.53

Nat'l Avg

291.79

Nat'l Avg

291.01

Nat'l Avg

293.26

 

 

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