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AERMET PROCESSING VERIFICATION REPORT -- KMEI (KEY FIELD AIRPORT)
Period 2021-2025   |   Generated 2026-07-26 17:14:42
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OVERALL RESULT: PROCESSED SUCCESSFULLY -- ALL QUARTERS MEET THE EPA CRITERION

   Processing              PASS
      AERMET errors                    : 0
      Non-physical values in .sfc      : 0
   Data completeness       PASS
      Quarters meeting EPA 90% criterion: 20 of 20

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1. STATION
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   Surface station      KMEI  KEY FIELD AIRPORT, MS
   ICAO / WBAN / USAF   KMEI / 13865 / 722340
   GHCNh station ID     USW00013865
   Latitude, longitude  32.3350 N, 88.7510 W
   Elevation            88.1 m MSL
   Wind reference ht    10.0 m   (AERMOD .sfc column 18)
   Temp reference ht    2.0 m   (AERMOD .sfc column 20)

   Upper air station    USM00072235  JACKSON/ALLEN C. THOMPSON FIE
   Latitude, longitude  32.3189 N, 90.0800 W
   Elevation            90.7 m MSL
   Separation           125 km W of KMEI

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2. SOFTWARE AND INPUT DATA
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   AERMET               26135
   AERMINUTE            26135
   AERSURFACE           26135
   Surface data         NCEI GHCNh hourly (replaces the discontinued ISHD)
   1-minute winds       NCEI ASOS 1-minute and 5-minute, hourly-averaged by
                        AERMINUTE and merged by AERMET
   Upper air            NCEI IGRA v2 radiosonde soundings

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3. SURFACE CHARACTERISTICS (AERSURFACE)
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   Land cover           NLCD 2021 (with impervious and canopy)
   Roughness method     ZORAD, 1000.0 m radius, monthly resolution
   Site coordinates     32.334722, -88.750833  (NAD83)
   Surface moisture     Average;  Arid: N
   Continuous snow      N
   Non-airport sectors  None
   Sectors              1
      sector 1:   0.0 to  360.0 degrees

   Monthly surface characteristics applied by AERMET:

      Month  Sector   Albedo   Bowen ratio   Roughness z0 (m)
      -----  ------   ------   -----------   ----------------
          1       1     0.16          0.72              0.033
          2       1     0.15          0.54              0.041
          3       1     0.15          0.54              0.041
          4       1     0.15          0.54              0.041
          5       1     0.15          0.42              0.047
          6       1     0.15          0.42              0.047
          7       1     0.15          0.42              0.047
          8       1     0.15          0.42              0.047
          9       1     0.15          0.42              0.047
         10       1     0.15          0.72              0.042
         11       1     0.15          0.72              0.042
         12       1     0.16          0.72              0.033

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4. SURFACE DATA QUALITY CONTROL
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   NCEI flags each observation with a quality code that AERMET does not act
   on, so the GHCNh file is screened before processing.  Rejected values are
   blanked (treated as missing); no record is dropped and no value is altered.

   Observations screened            69396
   Rejected, NCEI suspect/erroneous 208
   Rejected, METAR cross-check      1
   Full detail                      KMEI_GHCNh_2021_2025_qc_log.txt

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5. ANNUAL PROCESSING STATISTICS (from AERMET .RP2)
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   Year 2021
      Upper air soundings 743 | Surface obs 8784 | 1-min ASOS hrs 8784
      Calms 299 | Variable winds 22 | Cloud subs 3 | Temp subs 1
      Errors 0 | Warnings 359
   Year 2022
      Upper air soundings 774 | Surface obs 8759 | 1-min ASOS hrs 8784
      Calms 106 | Variable winds 7 | Cloud subs 13 | Temp subs 5
      Errors 0 | Warnings 355
   Year 2023
      Upper air soundings 758 | Surface obs 8781 | 1-min ASOS hrs 8784
      Calms 335 | Variable winds 34 | Cloud subs 26 | Temp subs 14
      Errors 0 | Warnings 358
   Year 2024
      Upper air soundings 754 | Surface obs 8805 | 1-min ASOS hrs 8808
      Calms 324 | Variable winds 23 | Cloud subs 7 | Temp subs 5
      Errors 0 | Warnings 357
   Year 2025
      Upper air soundings 738 | Surface obs 8502 | 1-min ASOS hrs 8760
      Calms 1287 | Variable winds 84 | Cloud subs 273 | Temp subs 148
      Errors 0 | Warnings 356

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6. DATA COMPLETENESS
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   EPA requires at least 90% valid data per calendar quarter.  The quarterly
   columns are the compliance test; the annual column is informational.

      Year       Q1       Q2       Q3       Q4     Annual   Result
      ----   ------   ------   ------   ------   --------   ------
      2021    99.9%    99.6%    99.6%    99.8%      99.7%   PASS
      2022    99.7%    98.6%    99.9%   100.0%      99.5%   PASS
      2023    99.7%    99.0%    99.6%    99.5%      99.5%   PASS
      2024    99.9%   100.0%    99.6%    99.3%      99.7%   PASS
      2025    97.3%    90.2%    93.6%    96.9%      94.5%   PASS

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7. PHYSICAL PLAUSIBILITY OF THE DELIVERED FILES
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   Screening of the .sfc files as delivered.  Wind speeds above 25 m/s and
   temperatures outside -25 to +45 C are reported for review; a non-zero count
   does not by itself mean the data are wrong, but each should be explainable.

      Year   Max wind   Min temp   Max temp   ws>25 m/s   T out of range
      ----   --------   --------   --------   ---------   --------------
      2021     11.1 m/s   -10.0 C    36.1 C           0                0
      2022     13.3 m/s   -10.6 C    39.4 C           0                0
      2023     12.0 m/s    -3.3 C    39.4 C           0                0
      2024     11.1 m/s   -11.1 C    38.9 C           0                0
      2025     14.2 m/s   -11.1 C    36.7 C           0                0

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8. CALMS AND MISSING DATA
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   AERMOD excludes calm hours (wind speed below the 0.5 m/s threshold) and
   missing hours from the averaging period, and reports both in its own output.
   They are counted here so the modeller can anticipate them.

      Year   Calm hrs   Missing hrs   Valid hrs
      ----   --------   -----------   ---------
      2021        299            25        8735
      2022        106            40        8720
      2023        335            47        8713
      2024        316            28        8756
      2025       1287           482        8278

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9. OUTPUT FILES
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   Files without the US suffix were processed WITHOUT the ADJ_U* option; files
   with the US suffix were processed with METHOD STABLEBL ADJ_U*.  Use one set
   or the other consistently -- do not mix them within a single AERMOD run.

      File                    Size (MB)   Hours   MD5
      --------------------   ---------   -----   --------------------------------
      KMEI2021.sfc                1.47    8784   b93854991a4f7f381a04f19a0906ef96
      KMEI2021.pfl                0.57       -   883f8614bcf15dd3c1b94a896e1c6276
      KMEI2021US.sfc              1.47    8784   7436d84fd2de0d9b7e4404693f5b9a01
      KMEI2021US.pfl              0.57       -   883f8614bcf15dd3c1b94a896e1c6276
      KMEI2022.sfc                1.47    8784   8e9c5a9977fe37cf40450c2bb72b0102
      KMEI2022.pfl                0.57       -   7a60ad0d59269075322964910e228edf
      KMEI2022US.sfc              1.47    8784   a32d2b809967d39d508cf189ae376908
      KMEI2022US.pfl              0.57       -   7a60ad0d59269075322964910e228edf
      KMEI2023.sfc                1.47    8784   da0e3cc019bc858a43afbe20dba53c14
      KMEI2023.pfl                0.57       -   2d65b6dc4ff868eee2b8f1fd5cf0bdac
      KMEI2023US.sfc              1.47    8784   a1318e389aef232022bb358dcbe2c318
      KMEI2023US.pfl              0.57       -   2d65b6dc4ff868eee2b8f1fd5cf0bdac
      KMEI2024.sfc                1.48    8808   aaa2540464473bc424a978d546ff96c5
      KMEI2024.pfl                0.57       -   6b6eeba89ef0ae0819bb8682f63e866c
      KMEI2024US.sfc              1.48    8808   6a9ca0a4150fdf7db9e407a781c284a8
      KMEI2024US.pfl              0.57       -   6b6eeba89ef0ae0819bb8682f63e866c
      KMEI2025.sfc                1.47    8784   6386376223126774c05c39b0b057f395
      KMEI2025.pfl                0.57       -   b505dcbd12af289edd126e3aa100966c
      KMEI2025US.sfc              1.47    8784   62640e70ef42839ccd72a79911284e31
      KMEI2025US.pfl              0.57       -   b505dcbd12af289edd126e3aa100966c

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End of report -- KMEI 2021-2025
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