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

Oct Score

ID

Nov Score

ID

Dec Score

ID

12 Month Avg

OHX

300.00

OTX

299.98

DVN

300.00

MFR

298.68

DVN

300.00

AMA

299.86

BRO

300.00

ABQ

298.25

AFG

300.00

ABQ

299.79

LIX

299.98

BRW

298.08

DRT

299.99

ITO

299.67

LKN

299.76

BRO

297.89

FFC

299.98

GJT

299.51

SNP

299.19

MCG

297.67

ILN

299.98

LCH

299.10

ABR

299.18

OTX

297.36

BOI

299.98

ILX

299.08

CRP

299.17

NKX

297.25

NKX

299.96

MCG

298.96

OAX

299.14

DRT

297.17

MAF

299.94

RNK

298.96

ILX

299.11

ITO

297.11

ILX

299.93

SGF

298.33

SLC

299.10

GJT

297.08

MHX

299.89

GUM

298.33

SGF

299.09

TFX

297.04

DDC

299.88

INL

298.31

TOP

298.93

BOI

296.98

MFR

299.86

DVN

298.31

MFR

298.89

INL

296.91

BRO

299.18

BRO

298.30

ITO

298.71

LKN

296.87

OTX

299.18

MAF

298.26

INL

298.36

ILN

296.86

INL

299.16

OHX

298.23

MAF

298.30

AFC

296.78

BMX

299.15

REV

298.05

BOI

298.29

MAF

296.63

UIL

299.13

TFX

298.01

JAX

298.28

TOP

296.54

GJT

299.00

ILN

297.47

MCG

298.16

RNK

296.52

OAK

298.98

GSO

297.45

DRT

298.10

SNP

296.48

CHS

298.38

BRW

297.39

EPZ

298.07

EPZ

296.43

TFX

298.37

TOP

297.38

AFC

297.58

SHV

296.38

LKN

298.35

MFR

297.38

NKX

297.54

OHX

296.35

ABQ

298.30

OKX

297.28

TBW

297.52

ANN

296.35

SGF

298.24

AFG

297.05

ABQ

297.52

ABR

296.13

TOP

298.21

FGZ

296.85

BRW

297.51

SLE

296.06

OTZ

297.58

MPX

296.67

MHX

297.48

GSO

296.02

CRP

297.58

APX

296.65

GGW

297.41

SLC

295.93

BET

297.58

FWD

296.62

RNK

297.37

LWX

295.86

MCG

297.57

TAE

296.33

FGZ

297.34

CRP

295.67

BRW

297.55

BMX

295.75

TFX

297.27

OAX

295.59

JAX

297.54

LWX

295.71

LIH

297.26

SJU

295.37

FGZ

297.53

NKX

295.61

GUM

296.77

OTZ

295.26

FWD

297.52

BOI

295.57

OTX

296.76

FWD

295.09

OKX

297.43

LKN

295.56

LZK

296.61

REV

295.02

RNK

297.42

AFC

295.00

GJT

296.55

PBZ

294.95

LIH

297.39

SLE

294.96

OHX

296.53

MHX

294.83

SLC

297.29

BUF

294.92

SJU

295.97

RIW

294.82

GYX

296.77

OTZ

294.90

OKX

295.89

OKX

294.77

DTX

296.77

LIX

294.86

LWX

295.89

CDB

294.73

GSO

296.74

EPZ

294.72

TAE

295.85

GRB

294.73

LZK

296.72

DRT

294.09

ILN

295.81

TBW

294.66

SNP

296.69

LZK

294.08

SHV

295.63

DTX

294.62

GRB

296.64

ADQ

293.92

APX

295.14

BUF

294.61

BIS

296.59

DDC

293.80

GRB

295.11

CHH

294.57

BUF

295.96

RIW

293.43

BIS

294.98

AFG

294.52

APX

295.93

ANN

293.33

AKN

294.35

DDC

294.41

SLE

295.93

OME

293.31

OTZ

294.30

BMX

294.40

PBZ

295.90

MHX

293.27

FWD

294.27

OAK

294.32

SHV

295.88

PBZ

293.19

MPX

293.52

LCH

294.12

LWX

295.84

YAK

293.15

DTX

293.47

ILX

294.01

RIW

295.65

DTX

292.50

OUN

293.43

JAX

294.00

SJU

295.16

CDB

292.48

MAJ

293.29

LZK

293.99

MFL

295.16

TBW

292.47

PBZ

293.29

BIS

293.89

TAE

295.14

ABR

292.41

BMX

293.22

MPX

293.88

OAX

295.14

OAK

292.23

ANN

292.74

JAN

293.84

OME

295.13

SLC

292.19

GSO

292.65

GGW

293.63

VEF

295.05

JAN

292.14

RIW

292.46

DVN

293.39

ANN

294.80

SNP

291.67

AFG

292.37

AMA

293.09

CAR

294.35

CHS

291.56

DNR

292.30

SGF

293.03

ABR

294.31

GYX

290.81

BUF

291.13

MFL

293.01

JAN

294.30

CAR

290.75

CHH

291.08

LIH

292.98

MPX

294.29

YAP

290.72

JAN

290.50

KEY

292.69

DNR

294.25

BIS

290.60

GYX

290.32

APX

292.61

AMA

294.21

GRB

289.96

MFL

290.18

CHS

292.44

KEY

293.51

KEY

289.95

AMA

290.16

UIL

292.39

GGW

293.43

UIL

289.94

DDC

289.36

BET

292.35

TBW

293.42

JAX

289.92

UNR

289.28

LIX

292.03

WAL

293.26

OAX

289.87

ROR

288.69

TWC

291.98

EPZ

293.25

GGW

288.94

KEY

288.58

DNR

291.90

PPG

293.02

MFL

288.31

PPG

288.38

FGZ

291.37

LIX

292.70

TWC

288.12

SLE

287.74

CAR

291.07

AFC

292.70

TKK

287.72

REV

287.71

VEF

290.94

CHH

291.94

WAL

287.42

LCH

287.10

GYX

290.94

TWC

291.85

SHV

286.52

OME

287.03

AKN

290.62

OUN

291.75

OUN

285.77

ADQ

286.10

LBF

289.00

LCH

291.13

CHH

285.00

CHS

285.44

OUN

288.19

REV

290.81

BET

284.95

VEF

285.28

ADQ

287.96

PNI

290.79

PNI

284.14

UIL

283.79

WAL

287.50

MAJ

290.29

CRP

283.95

FFC

283.65

YAK

287.44

CDB

290.25

PPG

283.86

CDB

282.18

TLH

287.44

ADQ

289.92

MAJ

283.24

YAP

281.21

PPG

287.12

ROR

288.45

LIH

283.05

LBF

280.22

FFC

286.90

ITO

286.86

DNR

282.78

TKK

279.76

OME

286.81

LBF

286.80

SJU

282.48

TWC

278.98

ROR

286.49

YAK

282.97

FFC

278.09

CAR

278.10

MAJ

285.59

GUM

282.26

LBF

277.11

ALY

277.16

ALY

285.02

YAP

281.31

VEF

276.45

YAK

276.46

UNR

281.78

UNR

279.63

UNR

272.97

WAL

273.25

GUM

278.23

ALY

277.96

ROR

268.33

OAK

268.29

YAP

267.34

AKN

274.99

ALY

264.85

BET

257.23

PNI

260.89

TKK

269.86

AKN

260.00

PNI

184.68

TKK

253.91

Nat'l Avg

294.65

Nat'l Avg

291.66

Nat'l Avg

291.06

 

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