With this application, you can plot COOP observations for a date of your choice.

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Data Listing

# 2018-04-24 High Temperature
# Download From: https://mesonet.agron.iastate.edu/GIS/apps/coop/plot.phtml
# Download Date: 24 Apr 2018
# Data Contact: Daryl Herzmann akrherz@iastate.edu 515.294.5978
#-----------------------snip------------------
        ID,         StationName,      Date,  Latitude, Longitude,      high
     CRCI4,CRESCO 1NE          ,2018-04-24,   43.3894,  -92.0938,        70
     ROKI4,RED OAK             ,2018-04-24,   41.0000,  -95.2333,        74
     OSEI4,OSCEOLA             ,2018-04-24,   41.0167,  -93.8167,        72
     EKRI4,ELKADER 6SSW        ,2018-04-24,   42.7754,  -91.4537,        70
     DNSI4,DENISON             ,2018-04-24,   42.0358,  -95.3297,        70
     CRNI4,Corning             ,2018-04-24,   40.9886,  -94.7491,        72
     LWDI4,LOWDEN              ,2018-04-24,   41.8667,  -90.9333,        72
     VNTI4,VINTON              ,2018-04-24,   42.1667,  -92.0000,        69
     BLLI4,BELLE PLAINE        ,2018-04-24,   41.9000,  -92.2667,        73
     CGGI4,COGGON              ,2018-04-24,   42.2792,  -91.5250,        69
     BLVI4,Bellevue LD 12      ,2018-04-24,   42.2667,  -90.4167,        67
     IDAI4,INDIANOLA 4 W       ,2018-04-24,   41.3667,  -93.5500,        72
     WSHI4,WASHINGTON          ,2018-04-24,   41.2833,  -91.6833,        72
     KEQI4,KEOSAUQUA           ,2018-04-24,   40.7200,  -91.9700,        71
     BCNI4,BEACONSFIELD        ,2018-04-24,   40.8236,  -94.0439,        71
     GRII4,GRINNELL 3 SW       ,2018-04-24,   41.7167,  -92.7333,        71
     MSTI4,MUSCATINE 2 N       ,2018-04-24,   41.4708,  -91.0428,        72
     OSAI4,OSAGE               ,2018-04-24,   43.2794,  -92.8106,        68
     MPTI4,MAPLETON NO. 2      ,2018-04-24,   42.1667,  -95.7833,        72
     MSHI4,MARSHALLTOWN        ,2018-04-24,   42.0667,  -92.9333,        72
     OSKI4,OSKALOOSA           ,2018-04-24,   41.3167,  -92.6500,        75
     CHRI4,CHARITON 1 E        ,2018-04-24,   41.0000,  -93.3167,        70
     SWEI4,SWEA CITY 4 W       ,2018-04-24,   43.3853,  -94.2500,        62
     DNNI4,DONNELLSON          ,2018-04-24,   40.6333,  -91.5667,        75
     DAKI4,DAKOTA CITY         ,2018-04-24,   42.7200,  -94.1800,        68
     LSXI4,LITTLE SIOUX 2 NW   ,2018-04-24,   41.8167,  -96.0167,        72
     IWAI4,IOWA FALLS          ,2018-04-24,   42.5333,  -93.2667,        71
     LOGI4,LOGAN               ,2018-04-24,   41.6333,  -95.8167,        74
     FSCI4,FOREST CITY 2 NNE   ,2018-04-24,   43.2839,  -93.6308,        63
     AMOI4,Anamosa 3SSW        ,2018-04-24,   42.0763,  -91.3019,        71
       3OI,LAMONI              ,2018-04-24,   40.6233,  -93.9508,        74
     NHPI4,NEW HAMPTON         ,2018-04-24,   43.0575,  -92.3122,        67
     MCWI4,MASON CITY          ,2018-04-24,   43.1500,  -93.1925,        66
     ATLI4,ATLANTIC 1 NE       ,2018-04-24,   41.4181,  -95.0031,        75
     CINI4,CARROLL             ,2018-04-24,   42.0667,  -94.8500,        73
     WEBI4,WEBSTER CITY        ,2018-04-24,   42.4667,  -93.8000,        70
     GNDI4,GRUNDY CENTER       ,2018-04-24,   42.3553,  -92.7739,        71
     DLDI4,Dubuque L&D 11      ,2018-04-24,   42.5167,  -90.6500,        67
     MHRI4,MANCHESTER NO. 2    ,2018-04-24,   42.4667,  -91.4500,        68
     CNTI4,CENTERVILLE         ,2018-04-24,   40.7375,  -92.8703,        75
     TRPI4,TRIPOLI             ,2018-04-24,   42.8131,  -92.2583,        69
     SHDI4,SHELDON             ,2018-04-24,   43.1808,  -95.8528,        69
     SIBI4,Sibley              ,2018-04-24,   43.4047,  -95.7483,        68
     LECI4,LeClaire L&D 14     ,2018-04-24,   41.5833,  -90.4167,        70
     RADI4,RATHBUN DAM         ,2018-04-24,   40.8200,  -92.8800,        72
     EOKI4,Keokuk L&D 19       ,2018-04-24,   40.4000,  -91.3667,        69
     SIDI4,SIDNEY              ,2018-04-24,   40.7500,  -95.6500,        73
     PERI4,PERRY               ,2018-04-24,   41.8381,  -94.1111,        72
     FYTI4,FAYETTE             ,2018-04-24,   42.8504,  -91.8157,        71
     WMTI4,FORT DODGE 5 NNW    ,2018-04-24,   42.5061,  -94.2011,        70
     HPTI4,HAMPTON             ,2018-04-24,   42.7500,  -93.2000,        71
       DMX,Des Moines WFO      ,2018-04-24,   41.7361,  -93.7233,        45
     CASI4,CASCADE             ,2018-04-24,   42.3000,  -91.0167,        72
     RKWI4,ROCKWELL CITY       ,2018-04-24,   42.4000,  -94.6167,        71
     SPRI4,SPIRIT LAKE         ,2018-04-24,   43.4231,  -95.1000,        68
     OAKI4,OAKLAND             ,2018-04-24,   41.3133,  -95.3906,        74
     WKNI4,Waukon 4SW          ,2018-04-24,   43.2403,  -91.5550,        69

You should be able to 'copy & paste' this raw data listing into a simple text editor and save the data file on your machine. Most GIS systems can then import this dataset as a layer. You may have to omit the commented lines (#) if your GIS has trouble importing the data.