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

Nov Score

ID

Dec Score

ID

Jan Score

ID

12 Month Avg.

OTX

299.98

DVN

300.00

SLC

299.96

BRW

298.01

AMA

299.86

BRO

300.00

AKN

299.92

ABQ

297.99

ABQ

299.79

LIX

299.98

MCG

299.51

BRO

297.94

ITO

299.67

LKN

299.76

ABR

299.19

MFR

297.91

GJT

299.51

SNP

299.19

TBW

299.07

MCG

297.78

LCH

299.10

ABR

299.18

REV

299.06

GJT

297.63

ILX

299.08

CRP

299.17

LIH

298.33

NKX

297.52

MCG

298.96

OAX

299.14

NKX

298.28

DRT

297.36

RNK

298.96

ILX

299.11

OTZ

298.20

ITO

297.20

SGF

298.33

SLC

299.10

EPZ

298.16

LKN

297.18

GUM

298.33

SGF

299.09

BRW

298.13

INL

296.91

INL

298.31

TOP

298.93

GJT

297.97

OTX

296.89

DVN

298.31

MFR

298.89

CHH

297.58

AFC

296.80

BRO

298.30

ITO

298.71

CAR

297.56

ILN

296.79

MAF

298.26

INL

298.36

AFC

297.56

LWX

296.74

OHX

298.23

MAF

298.30

SJU

297.19

BOI

296.62

REV

298.05

BOI

298.29

LWX

296.77

OTZ

296.53

TFX

298.01

JAX

298.28

SLE

296.76

ABR

296.33

ILN

297.47

MCG

298.16

BET

296.72

EPZ

296.31

GSO

297.45

DRT

298.10

AMA

296.68

SLE

296.27

BRW

297.39

EPZ

298.07

ABQ

296.66

TOP

296.27

TOP

297.38

AFC

297.58

LKN

296.29

MAF

296.24

MFR

297.38

NKX

297.54

ADQ

296.19

OHX

296.22

OKX

297.28

TBW

297.52

AFG

296.13

RNK

296.17

AFG

297.05

ABQ

297.52

DVN

295.97

SLC

296.15

FGZ

296.85

BRW

297.51

MFL

295.97

TFX

296.08

MPX

296.67

MHX

297.48

FWD

295.91

SNP

295.74

APX

296.65

GGW

297.41

BRO

295.82

SHV

295.71

FWD

296.62

RNK

297.37

VEF

295.79

GSO

295.55

TAE

296.33

FGZ

297.34

DRT

295.77

ANN

295.53

BMX

295.75

TFX

297.27

DTX

295.16

CRP

295.47

LWX

295.71

LIH

297.26

APX

295.12

AFG

295.31

NKX

295.61

GUM

296.77

ITO

295.01

PBZ

295.29

BOI

295.57

OTX

296.76

BOI

294.98

BUF

295.28

LKN

295.56

LZK

296.61

PBZ

294.35

SJU

295.27

AFC

295.00

GJT

296.55

ILN

294.35

OAX

295.26

SLE

294.96

OHX

296.53

BUF

294.35

REV

295.10

BUF

294.92

SJU

295.97

GRB

294.35

FWD

294.96

OTZ

294.90

OKX

295.89

CRP

294.33

TBW

294.92

LIX

294.86

LWX

295.89

OAX

294.31

ILX

294.89

EPZ

294.72

TAE

295.85

OAK

294.30

CHH

294.85

DRT

294.09

ILN

295.81

JAN

294.28

GRB

294.66

LZK

294.08

SHV

295.63

MAF

294.28

BIS

294.56

ADQ

293.92

APX

295.14

OUN

294.26

DTX

294.56

DDC

293.80

GRB

295.11

UIL

293.54

BMX

294.53

RIW

293.43

BIS

294.98

ILX

293.53

OKX

294.51

ANN

293.33

AKN

294.35

BIS

293.52

RIW

294.49

OME

293.31

OTZ

294.30

TOP

293.48

MHX

294.43

MHX

293.27

FWD

294.27

ROR

293.48

CDB

294.39

PBZ

293.19

MPX

293.52

MAJ

293.48

LCH

294.26

YAK

293.15

DTX

293.47

OTX

293.46

JAX

294.13

DTX

292.50

OUN

293.43

RIW

292.83

OAK

293.94

CDB

292.48

MAJ

293.29

LCH

292.73

GGW

293.89

TBW

292.47

PBZ

293.29

INL

292.72

MFL

293.81

ABR

292.41

BMX

293.22

UNR

292.62

DDC

293.74

OAK

292.23

ANN

292.74

FGZ

292.13

DVN

293.60

SLC

292.19

GSO

292.65

OHX

291.93

JAN

293.58

JAN

292.14

RIW

292.46

SGF

291.78

UIL

293.40

SNP

291.67

AFG

292.37

DNR

291.57

LZK

293.31

CHS

291.56

DNR

292.30

JAX

291.06

MPX

293.28

GYX

290.81

BUF

291.13

GGW

291.05

LIH

293.25

CAR

290.75

CHH

291.08

RNK

291.02

AMA

293.10

YAP

290.72

JAN

290.50

TAE

290.85

APX

292.94

BIS

290.60

GYX

290.32

SNP

290.32

SGF

292.82

GRB

289.96

MFL

290.18

GUM

290.30

LIX

292.64

KEY

289.95

AMA

290.16

GSO

290.28

CHS

292.58

UIL

289.94

DDC

289.36

LZK

290.20

BET

292.08

JAX

289.92

UNR

289.28

CDB

289.49

KEY

292.02

OAX

289.87

ROR

288.69

LIX

289.46

GYX

291.90

GGW

288.94

KEY

288.58

ANN

289.39

DNR

291.90

MFL

288.31

PPG

288.38

SHV

288.71

TLH

291.86

TWC

288.12

SLE

287.74

MHX

288.68

FGZ

291.84

TKK

287.72

REV

287.71

MPX

287.89

CAR

291.48

WAL

287.42

LCH

287.10

BMX

287.78

VEF

290.67

SHV

286.52

OME

287.03

MFR

287.61

AKN

290.62

OUN

285.77

ADQ

286.10

LBF

287.54

TWC

290.54

CHH

285.00

CHS

285.44

GYX

287.10

OUN

289.00

BET

284.95

VEF

285.28

OME

286.95

LBF

288.73

PNI

284.14

UIL

283.79

CHS

287.00

ADQ

288.39

CRP

283.95

FFC

283.65

YAP

286.93

WAL

288.37

PPG

283.86

CDB

282.18

OKX

286.27

YAK

287.72

MAJ

283.24

YAP

281.21

TFX

284.36

FFC

287.17

LIH

283.05

LBF

280.22

KEY

283.87

ROR

287.10

DNR

282.78

TKK

279.76

DDC

283.73

PPG

286.95

SJU

282.48

TWC

278.98

YAK

283.68

OME

286.67

FFC

278.09

CAR

278.10

TKK

282.90

MAJ

285.53

LBF

277.11

ALY

277.16

WAL

282.86

ALY

283.82

VEF

276.45

YAK

276.46

TWC

282.14

UNR

282.46

UNR

272.97

WAL

273.25

FFC

279.74

GUM

279.12

ROR

268.33

OAK

268.29

PPG

276.16

YAP

267.75

ALY

264.85

BET

257.23

ALY

275.00

PNI

257.15

AKN

260.00

PNI

184.68

PNI

235.23

TKK

254.09

Nat'l Avg

291.66

Nat'l Avg

291.06

Nat'l Avg

291.79

 

 

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