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

Dec Rank

ID

Jan Rank

ID

Feb rank

ID

12 month avg

DVN

300.00

SLC

299.96

SJU

300.00

MCG

298.37

BRO

300.00

AKN

299.92

BRO

299.97

ABQ

297.98

LIX

299.98

MCG

299.51

OAX

299.96

BRW

297.94

LKN

299.76

ABR

299.19

TFX

299.93

BRO

297.94

SNP

299.19

TBW

299.07

ILX

299.90

GJT

297.55

ABR

299.18

REV

299.06

AFG

299.60

MFR

297.46

CRP

299.17

LIH

298.33

DTX

299.11

ITO

297.34

OAX

299.14

NKX

298.28

LIH

299.08

DRT

297.28

ILX

299.11

OTZ

298.20

OKX

299.01

AFC

297.18

SLC

299.10

EPZ

298.16

SHV

298.91

LKN

297.09

SGF

299.09

BRW

298.13

ITO

298.87

ILN

297.01

TOP

298.93

GJT

297.97

DRT

298.84

NKX

296.93

MFR

298.89

CHH

297.58

MCG

298.81

OHX

296.83

ITO

298.71

CAR

297.56

LKN

298.68

INL

296.68

INL

298.36

AFC

297.56

GJT

298.68

OTX

296.59

MAF

298.30

SJU

297.19

MFL

298.19

ABR

296.55

BOI

298.29

LWX

296.77

MPX

298.19

TFX

296.47

JAX

298.28

SLE

296.76

ILN

298.18

SLC

296.32

MCG

298.16

BET

296.72

SGF

298.08

BOI

296.25

DRT

298.10

AMA

296.68

REV

298.03

ILX

296.23

EPZ

298.07

ABQ

296.66

DNR

297.93

SLE

296.22

AFC

297.58

LKN

296.29

MAF

297.84

MAF

296.16

NKX

297.54

ADQ

296.19

PBZ

297.32

AFG

296.12

TBW

297.52

AFG

296.13

BUF

297.27

EPZ

296.08

ABQ

297.52

DVN

295.97

SLC

297.26

OTZ

296.08

BRW

297.51

MFL

295.97

BRW

297.26

LWX

296.06

MHX

297.48

FWD

295.91

JAN

297.22

REV

295.93

GGW

297.41

BRO

295.82

OHX

297.21

TOP

295.83

RNK

297.37

VEF

295.79

ABR

297.18

RNK

295.73

FGZ

297.34

DRT

295.77

TBW

297.17

BUF

295.65

TFX

297.27

DTX

295.16

DDC

297.16

SJU

295.65

LIH

297.26

APX

295.12

LBF

297.01

SHV

295.64

GUM

296.77

ITO

295.01

EPZ

296.95

CHH

295.37

OTX

296.76

BOI

294.98

GYX

296.43

OAX

295.33

LZK

296.61

PBZ

294.35

AFC

296.43

SNP

295.15

GJT

296.55

ILN

294.35

CHH

296.42

PBZ

295.14

OHX

296.53

BUF

294.35

ADQ

296.34

TBW

295.13

SJU

295.97

GRB

294.35

GUM

296.31

CRP

295.10

OKX

295.89

CRP

294.33

YAK

296.30

RIW

295.08

LWX

295.89

OAX

294.31

ABQ

296.17

ANN

294.86

TAE

295.85

OAK

294.30

OTX

295.54

DTX

294.86

ILN

295.81

JAN

294.28

APX

295.52

OKX

294.81

SHV

295.63

MAF

294.28

CRP

295.49

BMX

294.77

APX

295.14

OUN

294.26

OME

295.39

GSO

294.52

GRB

295.11

UIL

293.54

OAK

294.61

DDC

294.41

BIS

294.98

ILX

293.53

INL

294.61

MHX

294.28

AKN

294.35

BIS

293.52

AMA

294.49

FWD

294.19

OTZ

294.30

TOP

293.48

CAR

293.73

BIS

294.04

FWD

294.27

ROR

293.48

LIX

293.69

LCH

293.89

MPX

293.52

MAJ

293.48

BET

293.69

GRB

293.84

DTX

293.47

OTX

293.46

OUN

293.68

UIL

293.84

OUN

293.43

RIW

292.83

RNK

293.62

JAX

293.75

MAJ

293.29

LCH

292.73

BMX

293.60

MFL

293.74

PBZ

293.29

INL

292.72

TOP

292.83

JAN

293.68

BMX

293.22

UNR

292.62

BOI

292.80

CDB

293.65

ANN

292.74

FGZ

292.13

LZK

292.78

MPX

293.57

GSO

292.65

OHX

291.93

JAX

292.76

OAK

293.57

RIW

292.46

SGF

291.78

SLE

291.94

LIH

293.56

AFG

292.37

DNR

291.57

LCH

291.92

APX

293.54

DNR

292.30

JAX

291.06

AKN

291.90

AMA

293.26

BUF

291.13

GGW

291.05

ANN

291.89

SGF

293.25

CHH

291.08

RNK

291.02

CDB

291.01

LIX

292.95

JAN

290.50

TAE

290.85

MFR

290.98

LZK

292.87

GYX

290.32

SNP

290.32

MAJ

290.97

DVN

292.78

MFL

290.18

GUM

290.30

UIL

290.94

GYX

292.57

AMA

290.16

GSO

290.28

SNP

290.18

BET

292.23

DDC

289.36

LZK

290.20

TAE

290.06

DNR

292.17

UNR

289.28

CDB

289.49

FWD

289.86

TLH

292.02

ROR

288.69

LIX

289.46

RIW

289.75

GGW

291.96

KEY

288.58

ANN

289.39

PPG

289.29

CAR

291.71

PPG

288.38

SHV

288.71

LWX

289.18

FGZ

291.15

SLE

287.74

MHX

288.68

NKX

289.15

CHS

290.72

REV

287.71

MPX

287.89

MHX

289.11

AKN

290.46

LCH

287.10

BMX

287.78

BIS

287.45

KEY

290.15

OME

287.03

MFR

287.61

FGZ

286.77

ADQ

289.17

ADQ

286.10

LBF

287.54

GSO

285.71

OUN

289.15

CHS

285.44

GYX

287.10

ALY

283.04

TWC

289.04

VEF

285.28

OME

286.95

UNR

282.94

VEF

289.04

UIL

283.79

CHS

287.00

OTZ

282.06

LBF

288.79

FFC

283.65

YAP

286.93

WAL

281.25

WAL

287.66

CDB

282.18

OKX

286.27

GRB

279.38

YAK

287.66

YAP

281.21

TFX

284.36

TWC

279.14

OME

287.48

LBF

280.22

KEY

283.87

PNI

277.45

PPG

286.87

TKK

279.76

DDC

283.73

KEY

276.66

ROR

285.63

TWC

278.98

YAK

283.68

ROR

274.77

MAJ

285.22

CAR

278.10

TKK

282.90

YAP

274.65

FFC

284.89

ALY

277.16

WAL

282.86

CHS

273.91

ALY

283.82

YAK

276.46

TWC

282.14

DVN

269.59

UNR

283.05

WAL

273.25

FFC

279.74

VEF

269.49

GUM

279.11

OAK

268.29

PPG

276.16

GGW

266.79

YAP

266.32

BET

257.23

ALY

275.00

FFC

257.83

PNI

255.94

PNI

184.68

PNI

235.23

TKK

217.58

TKK

249.49

Nat'l Avg

291.06

Nat'l Avg

291.79

Nat'l Avg

291.01

 

 

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