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

Jun Rank

ID

Jul Score

ID

Aug Score

ID

12 month Avg

SLE

300.00

SLE

300.00

FWD

300.00

LKN

298.07

BRO

300.00

JAN

300.00

DTX

300.00

MCG

297.77

BOI

300.00

DRT

299.98

ABQ

300.00

GJT

297.34

AMA

299.98

FWD

299.98

AMA

299.99

MFR

297.30

MCG

299.98

REV

299.97

MFR

299.96

NKX

297.27

NKX

299.96

CAR

299.96

AFG

299.95

EPZ

297.12

GGW

299.95

MHX

299.94

LZK

299.94

ABQ

297.11

UIL

299.95

FFC

299.81

TFX

299.91

ABR

297.03

ADQ

299.83

LIH

299.67

ADQ

299.76

OTX

296.97

ABR

299.79

DTX

299.65

RIW

299.74

BRW

296.93

LKN

299.68

ITO

299.58

OAK

299.74

TFX

296.83

SNP

299.17

NKX

299.19

SLE

299.19

ITO

296.82

CRP

299.17

LCH

299.19

PBZ

299.19

BOI

296.75

ANN

299.17

BUF

299.19

NKX

299.19

SGF

296.73

TFX

299.15

BRW

299.19

MCG

299.19

AFG

296.68

MFR

299.11

BRO

299.19

MHX

299.17

ILX

296.46

DRT

299.11

BOI

299.19

BRO

299.17

OHX

296.44

REV

299.10

GSO

299.17

EPZ

299.17

PBZ

296.20

WAL

299.05

PBZ

299.16

DDC

299.13

SLE

296.18

PBZ

299.00

CHH

299.15

SNP

299.06

LIH

296.16

LBF

298.97

OHX

299.13

GRB

298.98

DTX

296.13

CDB

298.38

ADQ

299.08

CDB

298.87

DRT

296.09

LCH

298.33

TWC

299.06

GSO

298.39

APX

296.08

JAX

298.33

OTX

299.02

LIX

298.38

INL

295.82

BUF

298.25

LKN

298.86

INL

298.33

BUF

295.81

GYX

297.98

GYX

298.37

VEF

298.29

AFC

295.74

ITO

297.78

MFR

298.35

FGZ

297.75

ANN

295.69

SJU

297.50

SLC

298.30

BRW

297.58

OAX

295.68

LZK

297.50

DDC

298.29

BOI

297.57

MHX

295.62

RIW

297.48

OTZ

297.58

ILN

297.56

SLC

295.54

AKN

297.48

ANN

297.58

DNR

297.53

MAF

295.41

DNR

297.19

AFG

297.58

LWX

297.50

DDC

295.14

MPX

297.12

AFC

297.58

ITO

297.34

GYX

295.12

CHS

296.67

DNR

297.35

CHH

296.77

LCH

295.08

OTZ

296.67

LBF

297.32

ILX

296.75

REV

295.00

DDC

296.67

FGZ

297.13

FFC

296.74

RIW

294.99

OKX

296.65

VEF

296.77

OKX

296.66

ILN

294.97

AFG

296.65

OME

296.77

GJT

296.66

OKX

294.90

BMX

295.83

KEY

296.77

LBF

296.66

LIX

294.86

BET

295.80

BET

296.77

REV

295.97

SJU

294.77

JAN

295.72

CHS

296.76

CRP

295.97

GSO

294.70

OAK

295.62

YAK

296.75

RNK

295.94

BRO

294.57

VEF

295.62

GGW

296.74

SGF

295.93

SNP

294.55

PNI

295.56

ROR

296.73

LIH

295.92

CRP

294.42

OHX

295.00

TFX

296.72

MAF

295.91

JAN

294.38

ABQ

295.00

INL

296.71

DVN

295.91

LWX

294.31

SGF

294.96

GJT

296.66

ABR

295.85

RNK

294.30

SLC

294.95

APX

295.97

LKN

295.60

CHH

294.29

RNK

294.92

ABQ

295.91

BUF

295.16

OTZ

294.24

OAX

294.87

RNK

295.90

GYX

295.16

LZK

294.22

GJT

294.80

LZK

295.90

ANN

295.09

AMA

294.15

OTX

294.78

EPZ

295.89

JAN

295.01

SHV

294.10

LIH

294.70

RIW

295.82

AKN

294.90

UIL

294.07

MHX

294.17

OAK

295.71

SJU

294.35

ADQ

293.87

BRW

294.17

WAL

295.51

OHX

294.35

TOP

293.78

AFC

294.17

AKN

295.16

LCH

294.31

DNR

293.68

DTX

294.15

UNR

295.06

WAL

294.31

FGZ

293.64

OME

294.15

ILX

294.55

SHV

294.29

OAK

293.60

CHH

294.14

SNP

294.35

SLC

294.24

MPX

293.42

YAK

294.13

SJU

294.35

OAX

294.12

JAX

293.41

APX

294.13

SGF

294.35

APX

293.55

FWD

293.04

FWD

294.13

OUN

294.33

AFC

292.68

TBW

292.90

ILN

294.00

MAF

294.27

UIL

291.90

GGW

292.79

FFC

293.32

SHV

293.55

PNI

291.90

DVN

292.75

TOP

293.25

JAX

293.21

GGW

291.85

MFL

292.58

EPZ

293.01

MCG

292.74

OME

291.12

BMX

292.17

DVN

292.95

ABR

292.56

DRT

291.10

LBF

291.97

OUN

292.50

LIX

291.89

ROR

291.03

OME

291.83

SHV

292.47

AMA

291.10

BIS

291.00

TLH

291.67

GUM

291.67

GRB

291.04

KEY

290.32

GRB

291.30

MAF

291.60

OKX

291.03

CHS

290.16

BIS

291.03

TBW

290.83

OAX

290.76

OTX

290.05

BET

290.77

LIX

290.83

UIL

290.29

OTZ

289.44

OUN

290.58

KEY

290.83

PNI

290.17

PPG

289.42

AKN

290.42

TAE

290.74

MFL

289.52

JAX

288.71

VEF

289.83

INL

290.69

LWX

289.37

TBW

288.71

WAL

289.35

PPG

290.21

DVN

289.25

CAR

288.71

CAR

289.34

ILX

289.93

CRP

287.90

TOP

288.62

KEY

289.27

LWX

289.91

GUM

287.10

YAP

288.22

CHS

289.12

FGZ

289.25

MAJ

287.06

BET

286.88

CDB

289.00

GSO

289.15

MPX

286.98

ALY

286.25

FFC

288.93

GRB

288.07

ALY

285.45

MPX

286.11

UNR

287.79

TWC

287.50

YAP

283.85

BMX

285.41

ROR

286.39

MFL

287.02

CDB

283.06

YAK

285.35

PPG

286.39

UNR

286.65

TOP

282.16

MFL

283.87

YAK

285.44

MAJ

284.17

BMX

281.04

TWC

282.18

TWC

284.99

CAR

283.33

TAE

280.58

TKK

282.04

MAJ

284.31

TKK

282.45

TKK

279.82

UNR

281.41

ALY

279.77

YAP

282.32

TBW

279.03

TAE

279.79

GUM

276.94

ALY

280.59

BIS

277.31

MAJ

276.25

YAP

276.53

ROR

278.27

ILN

273.97

OUN

272.58

TKK

275.48

BIS

266.16

PPG

263.51

GUM

264.07

PNI

258.63

Nat'l Avg

294.19

Nat'l Avg

293.96

Nat'l Avg

293.64

 

 

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