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

Apr Rank

ID

May Rank

ID

Jun Rank

ID

12 Month Avg

SLE

300.00

OTZ

300.00

MHX

300.00

MFR

297.87

CRP

300.00

UIL

299.99

BET

300.00

OTX

297.46

BET

300.00

CHS

299.97

AFC

300.00

BRO

297.41

AFC

300.00

MCG

299.96

OKX

299.99

AFC

297.34

TBW

299.98

DNR

299.95

CHS

299.98

MAF

297.30

AFG

299.98

OHX

299.91

TFX

299.97

RNK

296.87

BRO

299.96

GRB

299.86

ABQ

299.96

VEF

296.78

MFR

299.94

MFR

299.84

GSO

299.94

BOI

296.69

BRW

299.93

RIW

299.83

ILN

299.92

DRT

296.65

OTZ

299.91

DRT

299.83

LIH

299.91

INL

296.60

SHV

299.90

VEF

299.80

OAK

299.89

GJT

296.51

DRT

299.88

GJT

299.39

CHH

299.89

ABR

296.46

GJT

299.72

FGZ

299.27

MFR

299.78

EPZ

296.43

LKN

299.64

CHH

299.19

EPZ

299.77

DTX

296.41

TWC

299.63

BRO

299.19

REV

299.69

ILN

296.39

EPZ

299.47

ILN

299.06

JAN

299.67

ABQ

296.10

SJU

299.17

INL

299.06

ITO

299.58

SLE

296.09

ANN

299.15

REV

298.95

GUM

299.17

LKN

295.86

LWX

299.14

SHV

298.90

BOI

299.17

OHX

295.76

YAK

299.13

LIH

298.90

MCG

299.17

NKX

295.68

TFX

299.11

RNK

298.88

TAE

299.15

ITO

295.48

ABR

299.11

LZK

298.39

NKX

299.13

BET

295.44

BIS

299.10

BRW

298.39

VEF

299.08

JAN

295.39

MCG

299.09

BOI

298.39

DNR

299.05

TFX

295.28

PBZ

298.95

SLE

298.35

OHX

299.01

OAK

295.23

CDB

298.31

ITO

298.31

TOP

298.95

ANN

295.07

INL

298.31

WAL

298.15

ABR

298.82

SJU

295.01

ILN

298.30

BUF

297.56

LKN

298.52

LIH

294.95

LCH

298.29

TAE

297.56

CRP

298.33

TOP

294.87

OHX

298.13

SGF

297.54

CAR

298.33

TWC

294.83

AKN

297.49

CDB

297.54

MAF

298.29

TBW

294.72

GYX

297.48

AKN

297.50

OTX

298.27

BRW

294.67

KEY

297.48

ILX

297.47

SLE

298.10

SLC

294.65

BMX

297.46

DDC

297.40

GJT

298.06

GSO

294.60

VEF

297.42

EPZ

297.29

OUN

297.90

REV

294.51

DDC

297.42

SNP

296.77

PBZ

297.50

AFG

294.48

OAK

297.42

AFG

296.72

OTZ

297.50

FWD

294.48

REV

297.39

TFX

296.71

GYX

297.44

GGW

294.46

OME

296.67

LIX

296.64

LWX

297.43

MHX

294.45

CHH

296.67

LKN

296.32

SGF

297.37

OKX

294.38

OTX

296.65

SLC

295.99

BRO

296.67

SNP

294.28

GSO

296.63

SJU

295.97

MFL

296.65

SHV

294.16

NKX

296.63

APX

295.95

YAK

296.64

OAX

294.11

GGW

296.62

BMX

295.95

INL

296.63

CHS

293.88

ABQ

296.58

GGW

295.93

SNP

296.59

CRP

293.82

GRB

296.57

ALY

295.93

FGZ

296.56

BMX

293.79

CHS

296.56

DTX

295.93

SHV

296.48

PBZ

293.76

ILX

296.51

MPX

295.89

FFC

295.83

LWX

293.76

DTX

295.83

TOP

295.89

BRW

295.82

KEY

293.70

ITO

295.39

OAK

295.87

BIS

295.76

LZK

293.69

FWD

295.35

PBZ

295.85

DTX

295.76

MPX

293.59

UIL

295.00

JAN

295.79

WAL

295.70

RIW

293.55

DVN

294.97

ABR

295.58

GGW

295.59

DDC

293.48

BUF

294.14

AFC

295.16

CDB

295.00

ILX

293.44

TOP

294.13

ANN

295.15

ALY

294.98

AKN

293.30

SLC

293.69

NKX

295.13

AMA

294.96

MFL

293.27

OAX

293.23

PNI

295.08

SJU

294.96

SGF

292.89

RNK

293.19

ABQ

294.99

TBW

294.95

AMA

292.87

JAX

293.15

MHX

294.39

ILX

294.77

FGZ

292.77

SNP

292.50

OTX

294.29

PPG

294.64

JAX

292.75

OUN

292.50

OKX

294.29

GRB

294.34

BIS

292.20

CAR

292.48

FWD

294.26

KEY

294.17

YAK

292.10

JAN

291.48

GYX

294.25

RNK

294.17

OUN

291.94

FGZ

291.16

DVN

294.25

DRT

294.17

LBF

291.90

GUM

290.83

YAK

294.24

SLC

294.07

LCH

291.82

LZK

290.69

MFL

293.55

APX

294.01

DVN

291.40

MPX

290.00

BET

293.55

ADQ

293.79

OME

291.34

MAF

289.98

MAF

293.42

JAX

293.33

WAL

291.26

MHX

289.92

FFC

293.41

AFG

293.32

APX

291.11

ROR

289.90

TBW

292.74

LCH

293.31

CAR

291.04

ALY

289.13

GSO

292.72

RIW

293.10

BUF

290.96

APX

288.33

OME

292.70

UIL

292.50

LIX

290.75

LBF

288.27

YAP

292.67

LIX

291.67

ADQ

290.44

RIW

288.24

OUN

292.63

OAX

291.48

DNR

290.30

ADQ

288.07

AMA

292.55

DDC

291.34

GRB

289.53

MFL

287.50

JAX

292.25

UNR

291.32

CHH

288.96

WAL

287.38

MAJ

291.94

ANN

290.83

ALY

288.53

PNI

285.49

TWC

291.73

BUF

290.75

UIL

288.16

TKK

285.31

OAX

291.73

OME

289.17

GUM

287.87

BOI

285.00

LWX

291.09

DVN

289.05

FFC

287.83

AMA

284.98

CRP

291.07

BMX

288.31

GYX

287.80

OKX

284.10

PPG

290.79

TWC

288.30

ROR

287.52

TAE

284.05

KEY

290.28

ROR

287.50

MAJ

287.28

SGF

282.48

CAR

289.47

AKN

287.45

MCG

286.53

LIX

280.62

BIS

288.68

MPX

285.29

PPG

285.58

MAJ

276.30

ADQ

288.63

MAJ

285.00

PNI

283.14

DNR

274.98

ROR

288.61

FWD

284.89

TLH

283.09

UNR

270.79

LCH

287.85

LZK

284.38

OTZ

282.98

LIH

262.23

LBF

287.04

LBF

282.58

UNR

282.69

FFC

260.62

GUM

281.40

YAP

265.40

CDB

282.09

PPG

257.27

UNR

269.34

PNI

234.17

TKK

277.37

YAP

257.07

TKK

236.18

TKK

219.93

YAP

273.57

Nat'l Avg

292.55

Nat'l Avg

294.60

Nat'l Avg

293.69

 

 

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