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

Jul Rank

ID

Aug Rank

ID

Sep Rank

ID

12 Month Avg

BRW

300.00

BRW

300.00

OTZ

300.00

MFR

298.67

BMX

300.00

AKN

300.00

BIS

299.94

ABQ

298.11

AFC

300.00

CDB

299.99

GSO

299.94

AFC

297.67

UIL

299.98

DDC

299.99

NKX

299.89

BRO

297.14

BUF

299.98

INL

299.98

OTX

299.83

GJT

297.05

MAF

299.96

APX

299.97

RIW

299.71

SLE

297.05

NKX

299.96

SHV

299.96

ILN

299.17

ITO

297.02

MFR

299.86

SLE

299.94

BET

299.17

INL

296.98

OKX

299.19

NKX

299.92

ANN

299.17

OTX

296.95

SLE

299.18

BOI

299.91

ABQ

299.17

DRT

296.84

CHH

299.17

RIW

299.90

UIL

299.14

OAK

296.66

TFX

299.16

DVN

299.89

CDB

299.14

RNK

296.65

SNP

299.16

LIX

299.82

EPZ

299.10

BOI

296.47

LWX

299.14

MFR

299.78

OUN

299.10

LKN

296.46

ABQ

299.12

ITO

299.40

PBZ

299.09

EPZ

296.36

CAR

299.10

MCG

299.19

ITO

299.07

MAF

296.35

REV

299.03

BET

299.19

GGW

299.00

ABR

296.34

ITO

298.96

AFC

299.19

LIH

298.79

NKX

296.28

LIH

298.91

BUF

299.17

LKN

298.59

ILN

296.17

TBW

298.38

SNP

299.17

CRP

298.31

TOP

295.89

FWD

298.37

OAX

299.16

BRO

298.31

SHV

295.89

SLC

298.37

LCH

299.14

ABR

298.31

SJU

295.87

RNK

298.35

CHH

298.35

SJU

298.23

GSO

295.82

RIW

298.20

TFX

298.30

SHV

297.50

SLC

295.80

CDB

298.03

REV

298.13

LIX

297.50

ANN

295.75

GJT

297.65

SLC

297.90

LCH

297.50

TFX

295.67

ILX

297.57

ABQ

297.56

BRW

297.50

DTX

295.65

SJU

297.56

CAR

297.54

DRT

297.48

TBW

295.63

CRP

297.54

OKX

297.50

SLE

297.46

REV

295.62

BOI

297.54

BMX

297.49

AFG

297.44

BRW

295.57

BET

297.52

TOP

297.48

OAK

297.38

OAX

295.52

UNR

297.50

OTX

297.42

MFR

297.28

BET

295.39

AFG

297.25

JAX

297.42

LWX

296.67

LWX

295.33

ANN

296.77

PPG

296.98

TAE

296.67

CRP

295.23

DRT

296.76

GRB

296.74

MFL

296.65

OHX

295.19

DNR

296.73

LWX

296.73

SGF

296.65

RIW

295.12

PPG

296.70

SJU

296.72

OAX

296.64

MHX

295.08

OHX

296.69

TBW

296.70

AMA

296.64

FWD

295.01

DTX

296.65

RNK

296.61

TFX

296.63

OKX

294.98

BRO

295.97

SGF

295.85

BUF

296.59

AKN

294.66

MHX

295.96

FFC

295.81

FFC

296.49

LIH

294.62

GSO

295.96

OTZ

295.16

SLC

296.12

TWC

294.53

INL

295.91

OHX

295.14

DDC

295.83

BMX

294.46

LCH

295.90

LZK

295.12

UNR

295.73

DDC

294.35

MPX

295.89

ANN

295.10

REV

295.67

VEF

294.11

GRB

295.85

VEF

294.93

PPG

295.56

JAN

294.10

LBF

295.82

KEY

294.35

GJT

295.43

SNP

294.10

MCG

295.15

MFL

294.35

TWC

295.00

JAX

294.09

JAX

295.14

PBZ

294.33

BMX

295.00

GGW

294.00

ABR

295.09

ABR

294.29

MCG

294.98

AFG

293.92

JAN

295.08

UIL

294.27

BOI

294.96

PBZ

293.83

TWC

295.05

ILX

294.26

JAN

294.72

CHS

293.61

ILN

294.97

MHX

293.54

SNP

294.35

MPX

293.45

TOP

294.95

GUM

293.48

MPX

294.17

DNR

293.44

CHS

294.34

DNR

293.44

GYX

294.17

KEY

293.37

KEY

294.33

AMA

293.38

MAF

294.17

BUF

293.36

EPZ

294.30

LIH

293.22

TOP

294.16

MFL

293.29

SHV

294.28

GYX

292.74

FWD

294.14

LCH

293.28

OTZ

294.24

BRO

292.73

AKN

294.14

AMA

293.19

GGW

294.13

DRT

292.65

LBF

293.98

ILX

293.14

OAX

294.13

BIS

292.55

APX

293.33

SGF

293.04

LKN

293.93

GSO

291.92

OME

293.31

LZK

292.99

LZK

293.53

FWD

291.91

RNK

293.30

MCG

292.81

AKN

293.49

GJT

291.53

OKX

293.25

BIS

292.74

FFC

293.43

OAK

291.43

CHH

293.22

CDB

292.66

LIX

292.68

MPX

291.08

OHX

292.50

CAR

292.23

OTX

292.61

LBF

290.93

AFC

292.50

APX

291.84

AMA

292.58

LKN

290.51

ILX

292.30

DVN

291.56

OAK

292.43

ILN

290.21

FGZ

291.92

GRB

291.52

OME

291.94

MAF

289.52

MHX

291.67

LBF

291.48

GYX

291.13

CRP

289.50

DVN

291.67

LIX

291.22

TAE

291.12

EPZ

289.38

DTX

291.67

FGZ

290.21

MFL

291.11

YAK

288.57

CAR

291.67

UIL

289.73

BIS

290.93

TWC

287.57

LZK

291.61

OTZ

289.39

DDC

290.32

DTX

287.08

VEF

290.00

WAL

289.32

YAK

290.30

AFG

286.98

JAX

289.96

CHH

289.27

ALY

289.47

CHS

286.29

GRB

289.70

GYX

289.06

WAL

287.81

WAL

286.26

INL

289.17

YAK

288.63

ADQ

286.63

ALY

286.23

CHS

288.98

OUN

288.57

APX

286.26

TAE

286.16

WAL

288.50

ALY

288.44

PBZ

285.91

ROR

286.06

ALY

288.28

ROR

288.26

GUM

285.42

GGW

284.63

KEY

286.67

FFC

288.20

DVN

284.55

ADQ

283.38

ADQ

286.57

ADQ

288.18

ROR

284.24

FGZ

282.53

PNI

284.74

OME

287.06

SGF

283.85

MAJ

282.29

DNR

283.25

PPG

286.20

YAP

282.17

JAN

282.19

ROR

282.41

MAJ

284.63

MAJ

278.94

YAP

278.94

MAJ

282.34

TLH

283.89

TKK

270.01

OUN

272.48

TBW

281.58

UNR

282.85

VEF

267.72

UNR

270.93

TKK

277.70

GUM

277.61

FGZ

265.60

OME

233.81

YAK

251.32

PNI

269.86

OUN

265.30

PNI

211.88

YAP

205.00

YAP

266.25

PNI

197.51

TKK

73.39

GUM

140.73

TKK

256.01

Nat'l Avg

292.56

Nat'l Avg

289.72

Nat'l Avg

291.41

 

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