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.   .

ID

Jan Score

ID

Feb Score

ID

Mar Score

ID

12 Month Avg

OTX

300.00

GRB

299.99

DTX

300.00

ITO

298.60

BOI

299.99

SGF

299.98

ABR

299.95

TFX

297.29

BUF

299.98

TOP

299.94

OAK

299.94

SLE

297.24

LIH

299.92

BRO

299.91

RIW

299.91

BOI

297.17

AMA

299.90

ILN

299.88

BIS

299.90

BUF

297.08

LBF

299.86

LZK

299.85

MCG

299.86

DTX

297.07

ITO

299.75

ABQ

299.72

LCH

299.84

LIH

297.05

EPZ

299.74

ITO

299.41

ITO

299.25

ABR

297.04

GJT

299.28

MFL

299.14

BOI

299.19

GYX

297.01

DTX

299.17

SNP

299.14

OME

299.18

MHX

296.97

APX

299.16

DVN

299.14

OAX

299.16

OAK

296.90

OKX

299.12

CDB

299.14

BUF

299.15

MFR

296.82

CRP

299.10

SLE

299.12

CHH

299.14

AFG

296.76

YAP

299.02

UNR

299.06

MFR

299.12

NKX

296.56

ROR

298.99

SLC

299.02

TOP

299.08

SLC

296.56

TOP

298.32

LCH

298.94

WAL

298.99

OTX

296.56

SLC

297.50

ROR

298.90

AMA

298.72

MCG

296.48

UNR

297.42

GYX

298.28

MAF

298.71

DNR

296.38

DRT

297.41

ABR

298.25

OTX

298.37

LCH

296.31

RIW

297.30

INL

298.22

MPX

298.37

LBF

296.31

MPX

296.74

OTX

298.22

MHX

298.33

GJT

296.28

ABR

296.74

GGW

298.18

DVN

298.31

ANN

296.14

GRB

296.73

DNR

297.97

MFL

298.30

ABQ

296.11

FWD

296.72

LKN

297.85

LWX

298.28

SGF

296.07

ILX

296.71

SHV

297.25

SGF

298.27

RIW

296.00

OHX

296.66

YAP

297.22

GYX

298.24

DDC

295.76

JAX

296.60

MCG

297.13

SLC

298.23

OHX

295.66

WAL

296.46

LWX

296.55

ADQ

297.81

APX

295.63

ILN

295.97

APX

296.55

CDB

297.58

MAF

295.38

PBZ

295.97

OAK

296.49

UIL

297.57

BRW

295.26

DVN

295.95

BUF

296.44

GRB

297.56

DRT

295.19

OAX

295.93

OKX

296.40

BRO

297.56

AFC

295.18

MFL

295.91

LIH

296.29

ANN

297.53

ADQ

295.16

LIX

295.91

JAN

296.26

YAK

297.52

LKN

294.96

NKX

295.90

AFG

296.22

LKN

297.40

OKX

294.95

BIS

295.90

LBF

296.22

LIH

296.85

UNR

294.90

LWX

295.90

MPX

295.65

SJU

296.77

GGW

294.86

LZK

295.90

TFX

295.64

INL

296.72

WAL

294.78

TFX

295.83

TAE

295.58

AFC

296.72

OAX

294.76

MAF

295.81

NKX

295.57

GSO

296.68

DVN

294.73

YAK

295.79

JAX

295.50

JAX

296.66

PBZ

294.72

DDC

295.79

DRT

295.46

TBW

296.62

INL

294.65

TWC

295.34

MAF

295.44

DNR

296.59

EPZ

294.63

GYX

295.16

AMA

295.42

GJT

296.53

LWX

294.63

SLE

295.13

ILX

294.83

RNK

296.51

TOP

294.30

GSO

295.06

BIS

294.79

EPZ

296.17

AMA

294.26

MHX

295.05

BOI

294.79

TFX

296.13

MPX

293.98

OAK

295.02

CAR

294.78

FGZ

296.05

JAX

293.91

DNR

294.99

VEF

294.62

KEY

295.91

GSO

293.88

PPG

294.81

WAL

294.57

ABQ

295.87

AKN

293.86

MCG

294.58

RIW

294.49

AFG

295.79

ILN

293.79

GUM

294.35

EPZ

294.37

ILX

295.72

RNK

293.68

CHS

294.31

YAK

293.97

DRT

295.70

FGZ

293.66

VEF

294.31

OAX

293.97

PBZ

295.68

CHH

293.41

INL

294.25

BRW

293.94

CAR

295.16

ILX

293.21

ABQ

294.22

KEY

293.90

SLE

295.12

LZK

293.18

REV

294.07

OUN

293.88

OHX

294.94

BIS

293.09

GGW

293.90

GJT

293.88

FWD

294.93

GRB

293.07

FGZ

293.80

REV

293.79

BMX

294.92

SHV

292.97

SGF

293.55

DDC

293.76

PPG

294.92

CDB

292.84

AKN

293.55

AFC

293.10

BET

294.35

SJU

292.78

UIL

293.55

DTX

293.00

BRW

294.31

FWD

292.58

BMX

293.50

MFR

292.90

DDC

294.19

BRO

292.52

TKK

293.47

SJU

292.82

OUN

294.13

VEF

292.44

RNK

293.33

UIL

292.22

LIX

294.06

MFL

292.18

CDB

292.74

RNK

292.10

LBF

293.95

ROR

292.07

AFC

291.94

OHX

292.05

PNI

293.87

YAK

291.90

LCH

291.92

ANN

291.35

FFC

293.43

REV

291.73

MAJ

291.77

FFC

291.15

ILN

293.37

FFC

291.67

ANN

291.12

BMX

291.08

UNR

292.71

BMX

291.62

BRO

290.94

AKN

290.52

TAE

292.50

SNP

291.44

AFG

290.52

FWD

290.31

SNP

291.94

LIX

291.34

KEY

290.32

CHH

289.66

AKN

291.94

JAN

291.18

FFC

290.10

OME

289.62

OKX

291.89

TBW

291.07

SHV

289.89

MHX

289.61

OTZ

291.88

KEY

290.63

OUN

289.46

ADQ

288.46

VEF

291.74

TLH

290.21

TAE

289.24

PNI

288.41

ROR

291.63

TWC

290.04

OME

288.70

PBZ

287.02

CRP

291.13

CAR

289.89

OTZ

288.69

TKK

287.00

TWC

290.84

OME

289.48

BRW

288.68

TWC

286.65

JAN

289.60

CHS

287.87

TBW

288.68

GUM

285.32

REV

289.39

CRP

287.81

BET

288.67

GSO

285.24

SHV

287.27

OTZ

287.79

JAN

288.63

MAJ

285.21

NKX

287.10

OUN

287.70

MFR

287.79

OTZ

283.58

GGW

287.04

BET

286.25

ALY

287.78

FGZ

283.55

ALY

286.27

PPG

285.76

SNP

287.07

CHS

283.46

MAJ

285.15

TKK

285.24

CAR

286.27

PPG

280.95

APX

283.87

GUM

285.04

SJU

284.68

ALY

280.15

GUM

282.24

UIL

284.17

CHH

284.67

TBW

279.25

LZK

277.15

YAP

282.44

PNI

281.74

BET

258.56

TKK

276.51

ALY

277.96

LKN

279.86

LIX

253.37

CHS

263.66

PNI

274.87

ADQ

279.14

CRP

214.53

YAP

237.89

MAJ

270.99

Nat'l Avg

293.99

Nat'l Avg

292.29

Nat'l Avg

294.03

 

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