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

Mar Rank

ID

Apr Rank

ID

May Rank

ID

12 Month Avg.

BOI

299.99

APX

300.00

TFX

300.00

MCG

297.90

ABR

299.91

MFR

299.98

GYX

300.00

ABQ

297.59

TBW

299.90

SGF

299.92

ANN

300.00

MFR

297.47

GGW

299.89

OAX

299.85

ABR

299.96

OTX

297.34

EPZ

299.87

DDC

299.61

BIS

299.94

BRW

297.34

DNR

299.85

ITO

299.49

PBZ

299.87

NKX

297.33

TOP

299.85

TBW

299.17

EPZ

299.82

GJT

297.26

YAP

299.59

SJU

299.17

LCH

299.79

LKN

297.14

APX

299.19

DTX

299.16

ADQ

299.60

ITO

297.09

ILX

299.16

MCG

299.15

ITO

299.54

ABR

297.03

MCG

299.07

GYX

299.15

UIL

299.18

TFX

296.97

OHX

299.07

UIL

299.14

MFR

299.16

AFC

296.97

MFR

299.04

OTX

299.11

INL

299.16

ILX

296.91

LBF

298.85

SLE

299.10

LKN

299.08

BOI

296.74

AFC

298.39

DNR

299.08

OAK

298.81

EPZ

296.73

PBZ

298.37

OHX

299.06

OKX

298.74

OHX

296.64

OAX

298.36

ILX

299.01

BRW

298.39

ILN

296.60

BUF

298.36

SHV

298.95

APX

298.39

INL

296.38

LCH

298.33

GJT

298.93

OTX

298.36

LIH

296.30

RNK

298.11

LKN

298.76

MPX

298.35

OAX

296.10

RIW

298.04

CHH

298.33

SGF

298.35

TOP

296.06

LKN

297.65

NKX

298.32

MHX

298.29

SGF

296.05

YAK

297.58

MHX

298.26

GJT

298.29

SLE

296.02

ANN

297.58

BUF

298.25

LIH

298.29

OKX

295.93

OTX

297.56

GUM

297.50

LIX

298.28

MAF

295.91

JAX

297.55

BRO

297.50

DDC

298.12

APX

295.79

ABQ

297.51

ANN

297.50

SNP

297.58

SLC

295.78

MHX

297.46

INL

297.47

AFC

297.58

LWX

295.69

NKX

297.46

BIS

297.44

RIW

297.56

BUF

295.59

BIS

297.40

EPZ

297.39

OME

297.54

DRT

295.54

MFL

296.75

GRB

296.67

DTX

297.54

TBW

295.52

REV

296.74

AKN

296.67

ILN

297.52

MHX

295.30

SLE

296.72

AFC

296.67

AFG

297.48

AFG

295.30

TFX

296.67

ABQ

296.65

LWX

297.46

REV

295.15

BMX

296.66

UNR

296.61

CHH

296.77

LIX

295.12

MAF

296.57

GSO

296.61

SLC

296.67

SJU

295.02

OAK

295.97

LIH

296.48

OTZ

295.97

SHV

294.97

SJU

295.93

CRP

295.82

AKN

295.97

DTX

294.93

ILN

295.84

MPX

295.81

TAE

295.95

ANN

294.93

TAE

295.66

ILN

295.80

TBW

295.95

CHH

294.90

GJT

295.56

KEY

295.79

JAN

295.88

RIW

294.84

GYX

295.16

DRT

295.78

FFC

295.82

GSO

294.79

GSO

295.16

JAX

295.76

GSO

295.16

LCH

294.79

DVN

295.13

ABR

295.69

UNR

295.16

BIS

294.76

INL

295.13

OTZ

295.65

OAX

295.14

SNP

294.74

BRO

295.12

LIX

295.65

LBF

295.14

CRP

294.61

LIX

295.11

MFL

295.00

MCG

295.11

PBZ

294.57

OKX

295.10

TFX

294.99

CRP

295.06

OTZ

294.51

SGF

295.08

BRW

294.97

SHV

294.95

RNK

294.50

VEF

295.05

GGW

294.92

SLE

294.35

UIL

294.45

LWX

295.04

SLC

294.17

MFL

294.35

MFL

294.39

OUN

295.00

AFG

294.17

BOI

294.35

GYX

294.27

LIH

294.96

REV

294.15

BMX

294.35

BMX

294.13

AMA

294.93

LBF

294.01

ILX

294.29

DDC

294.11

FFC

294.91

TOP

293.96

OHX

294.27

JAX

293.88

DTX

294.35

FGZ

293.52

WAL

294.25

TLH

293.78

BET

294.35

BET

293.33

MAF

293.96

MPX

293.59

GRB

294.33

BOI

293.33

GGW

293.49

BRO

293.48

JAN

293.80

SNP

292.50

DVN

293.45

DNR

293.44

DRT

293.55

LWX

292.45

NKX

292.71

AMA

293.30

BRW

293.49

TAE

292.38

ABQ

292.70

JAN

293.23

FWD

292.54

LZK

292.38

BET

292.70

OAK

292.99

FGZ

291.96

OUN

291.69

LZK

292.66

LZK

292.53

ROR

291.94

ADQ

291.65

TOP

292.54

DVN

292.37

MPX

291.94

OAK

291.59

CDB

291.92

BET

292.20

UIL

291.86

OKX

291.52

RNK

291.86

GRB

292.04

SHV

291.82

WAL

291.51

YAK

291.86

GGW

291.60

AFG

291.80

LCH

291.51

ROR

291.82

FWD

291.47

KEY

291.13

ROR

290.83

FGZ

291.47

CAR

291.26

CHH

291.11

DVN

290.80

PPG

291.22

ADQ

290.96

WAL

291.02

FFC

290.75

DNR

291.09

FGZ

290.35

PPG

290.33

MAF

289.86

VEF

291.08

PPG

290.15

CRP

290.27

AMA

289.67

BUF

290.30

CDB

290.06

LZK

290.24

VEF

289.08

TWC

289.52

LBF

290.00

CHS

290.21

JAN

289.04

GUM

289.49

AKN

289.87

DDC

290.15

CDB

288.29

CAR

289.49

KEY

289.68

ITO

289.93

BMX

288.27

DRT

289.29

CHS

288.87

SNP

289.52

RIW

287.43

JAX

287.88

OUN

288.61

AKN

289.52

PPG

285.70

KEY

287.10

FFC

288.53

GUM

288.71

PBZ

285.69

SJU

286.91

WAL

287.76

OTZ

288.52

TKK

285.00

CHS

286.29

UNR

287.51

CAR

287.90

OME

284.97

REV

284.68

VEF

287.42

ADQ

287.48

FWD

284.60

OUN

282.92

OME

286.23

SLC

286.24

CHS

284.04

AMA

282.05

ROR

285.71

OME

286.23

RNK

283.19

GRB

281.42

YAK

285.38

UNR

285.39

ALY

281.50

TKK

278.98

TWC

285.17

TKK

281.96

YAP

280.41

FWD

276.95

MAJ

284.20

ALY

281.38

MAJ

278.91

ALY

275.75

ALY

281.30

MAJ

277.63

CAR

276.57

MAJ

274.06

GUM

279.87

TWC

275.59

YAK

275.76

PNI

271.50

YAP

274.20

CDB

262.90

TWC

270.74

YAP

264.12

TKK

252.07

PNI

240.15

PNI

157.26

BRO

252.23

PNI

239.13

Nat'l Avg

293.26

Nat'l Avg

291.96

Nat'l Avg

292.92

 

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