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

Sep Score

ID

Oct Score

ID

Nov Score

ID

12 Month Avg

OTZ

300.00

OHX

300.00

OTX

299.98

MFR

298.59

BIS

299.94

DVN

300.00

AMA

299.86

ABQ

298.18

GSO

299.94

AFG

300.00

ABQ

299.79

NKX

297.44

NKX

299.89

DRT

299.99

ITO

299.67

BRO

297.28

OTX

299.83

FFC

299.98

GJT

299.51

OTX

297.23

RIW

299.71

ILN

299.98

LCH

299.10

GJT

297.12

ILN

299.17

BOI

299.98

ILX

299.08

DRT

297.12

BET

299.17

NKX

299.96

MCG

298.96

MCG

296.96

ANN

299.17

MAF

299.94

RNK

298.96

AFC

296.85

ABQ

299.17

ILX

299.93

SGF

298.33

INL

296.84

UIL

299.14

MHX

299.89

GUM

298.33

BOI

296.82

CDB

299.14

DDC

299.88

INL

298.31

ILN

296.80

EPZ

299.10

MFR

299.86

DVN

298.31

SLE

296.73

OUN

299.10

BRO

299.18

BRO

298.30

RNK

296.72

PBZ

299.09

OTX

299.18

MAF

298.26

OAK

296.48

ITO

299.07

INL

299.16

OHX

298.23

LKN

296.41

GGW

299.00

BMX

299.15

REV

298.05

EPZ

296.30

LIH

298.79

UIL

299.13

TFX

298.01

MAF

296.28

LKN

298.59

GJT

299.00

ILN

297.47

SHV

296.27

CRP

298.31

OAK

298.98

GSO

297.45

BRW

296.26

BRO

298.31

CHS

298.38

BRW

297.39

TFX

296.16

ABR

298.31

TFX

298.37

TOP

297.38

ITO

296.14

SJU

298.23

LKN

298.35

MFR

297.38

LWX

296.07

SHV

297.50

ABQ

298.30

OKX

297.28

OHX

296.02

LIX

297.50

SGF

298.24

AFG

297.05

TOP

296.01

LCH

297.50

TOP

298.21

FGZ

296.85

GSO

295.96

BRW

297.50

OTZ

297.58

MPX

296.67

SNP

295.93

DRT

297.48

CRP

297.58

APX

296.65

ABR

295.86

SLE

297.46

BET

297.58

FWD

296.62

ANN

295.80

AFG

297.44

MCG

297.57

TAE

296.33

REV

295.67

OAK

297.38

BRW

297.55

BMX

295.75

CRP

295.67

MFR

297.28

JAX

297.54

LWX

295.71

OAX

295.52

LWX

296.67

FGZ

297.53

NKX

295.61

SJU

295.51

TAE

296.67

FWD

297.52

BOI

295.57

BET

295.43

MFL

296.65

OKX

297.43

LKN

295.56

DDC

295.16

SGF

296.65

RNK

297.42

AFC

295.00

SLC

295.02

OAX

296.64

LIH

297.39

SLE

294.96

RIW

294.98

AMA

296.64

SLC

297.29

BUF

294.92

CHH

294.97

TFX

296.63

GYX

296.77

OTZ

294.90

FWD

294.96

BUF

296.59

DTX

296.77

LIX

294.86

CDB

294.93

FFC

296.49

GSO

296.74

EPZ

294.72

MHX

294.90

SLC

296.12

LZK

296.72

DRT

294.09

DTX

294.90

DDC

295.83

SNP

296.69

LZK

294.08

TBW

294.66

UNR

295.73

GRB

296.64

ADQ

293.92

AFG

294.66

REV

295.67

BIS

296.59

DDC

293.80

OKX

294.64

PPG

295.56

BUF

295.96

RIW

293.43

BUF

294.61

GJT

295.43

APX

295.93

ANN

293.33

LCH

294.52

TWC

295.00

SLE

295.93

OME

293.31

JAN

294.22

BMX

295.00

PBZ

295.90

MHX

293.27

BMX

294.20

MCG

294.98

SHV

295.88

PBZ

293.19

BIS

293.96

BOI

294.96

LWX

295.84

YAK

293.15

ILX

293.88

JAN

294.72

RIW

295.65

DTX

292.50

GRB

293.79

SNP

294.35

SJU

295.16

CDB

292.48

JAX

293.67

MPX

294.17

MFL

295.16

TBW

292.47

PBZ

293.62

GYX

294.17

TAE

295.14

ABR

292.41

AMA

293.56

MAF

294.17

OAX

295.14

OAK

292.23

MPX

293.54

TOP

294.16

OME

295.13

SLC

292.19

LZK

293.53

FWD

294.14

VEF

295.05

JAN

292.14

MFL

293.49

AKN

294.14

ANN

294.80

SNP

291.67

TWC

293.18

LBF

293.98

CAR

294.35

CHS

291.56

KEY

293.17

APX

293.33

ABR

294.31

GYX

290.81

LIH

293.14

OME

293.31

JAN

294.30

CAR

290.75

CHS

293.12

RNK

293.30

MPX

294.29

YAP

290.72

SGF

293.03

OKX

293.25

DNR

294.25

BIS

290.60

GGW

293.02

CHH

293.22

AMA

294.21

GRB

289.96

OTZ

292.89

OHX

292.50

KEY

293.51

KEY

289.95

DVN

292.51

AFC

292.50

GGW

293.43

UIL

289.94

DNR

292.31

ILX

292.30

TBW

293.42

JAX

289.92

CAR

292.09

FGZ

291.92

WAL

293.26

OAX

289.87

APX

291.93

MHX

291.67

EPZ

293.25

GGW

288.94

UIL

291.92

DVN

291.67

PPG

293.02

MFL

288.31

VEF

291.83

DTX

291.67

LIX

292.70

TWC

288.12

LIX

291.29

CAR

291.67

AFC

292.70

TKK

287.72

FGZ

290.75

LZK

291.61

CHH

291.94

WAL

287.42

AKN

290.54

VEF

290.00

TWC

291.85

SHV

286.52

LBF

289.87

JAX

289.96

OUN

291.75

OUN

285.77

GYX

289.86

GRB

289.70

LCH

291.13

CHH

285.00

WAL

289.12

INL

289.17

REV

290.81

BET

284.95

ADQ

288.23

CHS

288.98

PNI

290.79

PNI

284.14

YAK

288.11

WAL

288.50

MAJ

290.29

CRP

283.95

OUN

287.59

ALY

288.28

CDB

290.25

PPG

283.86

OME

287.55

KEY

286.67

ADQ

289.92

MAJ

283.24

TLH

287.16

ADQ

286.57

ROR

288.45

LIH

283.05

FFC

286.90

PNI

284.74

ITO

286.86

DNR

282.78

ROR

286.88

DNR

283.25

LBF

286.80

SJU

282.48

PPG

286.32

ROR

282.41

YAK

282.97

FFC

278.09

ALY

285.89

MAJ

282.34

GUM

282.26

LBF

277.11

MAJ

284.48

TBW

281.58

YAP

281.31

VEF

276.45

UNR

281.71

TKK

277.70

UNR

279.63

UNR

272.97

GUM

278.03

YAK

251.32

ALY

277.96

ROR

268.33

PNI

269.56

YAP

205.00

AKN

274.99

ALY

264.85

YAP

267.35

GUM

140.73

TKK

269.86

AKN

260.00

TKK

254.94

Nat'l Avg

291.41

Nat'l Avg

294.65

Nat'l Avg

291.66

 

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