TITLE: Mesonet Automated Weather Observing System (AWOS) 20-min Data [JOSS] CONTACTS: Steve Williams UCAR/JOSS P.O. Box 3000 Boulder, CO 80307-3000 phone: 303-497-8164 email: sfw@ucar.edu 1.0 DATA SET OVERVIEW This data set contains 20-minute resolution surface meteorological data from the Automated Weather Observing System (AWOS) stations located across the IHOP region. This data set includes only those AWOS data that are not sent on the NWS circuit. These data were retrieved via modem twice during the IHOP period (13 May to 25 June 2002). Each file contains several days of data and there may be some overlap between the files. The data are in ASCII format. 2.0 INSTRUMENT DESCRIPTION 2.1 Instrumentation information Some information on AWOS can be found at the Federal Aviation Administration Automated Weather Sensors page at: http://www.faa.gov/asos/ 2.2 Station Locations These station locations are taken from the AirNav database (http://www.airnav.com). Elevations are in meters. ID City Location ST Latitude Longitude Elev ------------------------------------------------------------------------------------------ K2K3 Johnson Stanton County Municipal Airport KS 37.5827111 -101.7328100 1013 K4O4 Idabel Mc Curtain County Regional Airport OK 33.9093250 -94.8583528 143 KCBK Colby Shalz Field Airport KS 39.4275308 -101.0465719 971.1 KF05 Vernon Wilbarger County Airport TX 34.2256681 -99.2837500 385.6 KHHF Canadian Hemphill County Airport TX 35.8953078 -100.4036397 729.7 KHHW Hugo Stan Stamper Municipal Airport OK 34.0348256 -95.5419061 174.0 KIDP Independence Independence Municipal Airport KS 37.1583611 -95.7783889 251 KK88 Iola Allen County Airport KS 37.8700833 -95.3863889 309.4 KM58 Monett Monett Municipal Airport MO 36.9062153 -94.0127583 400.8 KMPR McPherson McPherson Airport KS 38.3524372 -97.6913303 456.3 KPTT Pratt Pratt Industrial Airport KS 37.7000175 -98.7462025 595.0 KPVW Plainview Hale County Airport TX 34.1681472 -101.7173361 1028.4 KSNK Snyder Winston Field Airport TX 32.6933867 -100.9504525 740.7 KTQK Scott City Scott City Municipal Airport KS 38.4742778 -100.8849444 903.1 KULS Ulysses Ulysses Airport KS 37.6037528 -101.3733889 934.8 3.0 DATA COLLECTION AND PROCESSING UCAR/JOSS conducted no processing or quality control on these data. Further information is also available at the FAA Automated Weather Sensor Home Page: http://www.faa.gov/asos/index.htm 4.0 DATA FORMAT AND FILE NAMING 4.1 Data Format What follows is a very short description of the AWOS format. 1042 0206040045 SCT070 SCT095 BKN120 10 024 017 11 0080122978 5000 06V13 00D LTG AT APRT AND DSNT W THRU N TS -RA 1042 number of observation in file. 0206040045 date - yymmddhhmm UTC SCT070 SCT 095 BKN 120 Cloud cover SCT=scattered, BKN=broken, OVC=Overcast, CLR=clear below 12000ft cloud heights in hundreds of feet (070 = 7000ft) 10 visibility in statute miles 024 air temperature in deg C (may be deg F for some stations) 017 dew point temperature in deg C (may be deg F for some stations) 11 wind direction in tens of degrees (11 = 110 deg) 0080122978 008 wind speed in knots 012 wind gust in knots 2978 altimeter setting in inches of mercury * 100 5000 unknown 06V13 Believed to be wind direction variable between 60 and 130 deg 00D 00 precipitation recorded in previous 20 min D day/night indicator LTG AT APRT AND DSNT W THRU N TS -RA present weather indicators For information on the meaning of the present weather indicator and other items reported please see the Federal Meteorological Handbook 1 Surface Weather Observations and Reports which is included with your order (FMH.pdf) 4.2 File Naming Conventions KULS.vaisala.20020614 KULS is the station identifier (see station list above) vaisala is the type of AWOS station 20020614 is yyyymmdd and represents the day that we dialed up the station so it includes data up to that date. Typically around 3 weeks of data are in a particular data file. 5.0 DATA REMARKS None. 6.0 REFERNCES None.