==============================================================================
AERMET PROCESSING VERIFICATION REPORT -- KHKS (HAWKINS FIELD AIRPORT)
Period 2021-2025   |   Generated 2026-07-26 17:11:15
==============================================================================

OVERALL RESULT: PROCESSED SUCCESSFULLY -- SOME QUARTERS BELOW THE EPA CRITERION

   Processing              PASS
      AERMET errors                    : 0
      Non-physical values in .sfc      : 0
   Data completeness       SEE NOTE
      Quarters meeting EPA 90% criterion: 19 of 20

   Note: 1 quarter(s) fall below the 90% criterion.  This reflects gaps in
   the source observation archive, not an error in processing.  Review those
   periods when selecting a station and period for a regulatory application and
   consider substitute years, consistent with Appendix W and regional guidance.

------------------------------------------------------------------------------
1. STATION
------------------------------------------------------------------------------
   Surface station      KHKS  HAWKINS FIELD AIRPORT, MS
   ICAO / WBAN / USAF   KHKS / 13927 / 722354
   GHCNh station ID     USW00013927
   Latitude, longitude  32.3380 N, 90.2210 W
   Elevation            101.7 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           13 km E of KHKS

------------------------------------------------------------------------------
2. SOFTWARE AND INPUT DATA
------------------------------------------------------------------------------
   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

------------------------------------------------------------------------------
3. SURFACE CHARACTERISTICS (AERSURFACE)
------------------------------------------------------------------------------
   Land cover           NLCD 2021 (with impervious and canopy)
   Roughness method     ZORAD, 1000.0 m radius, monthly resolution
   Site coordinates     32.337500, -90.221389  (NAD83)
   Surface moisture     Average;  Arid: N
   Continuous snow      N
   Non-airport sectors  2
   Sectors              2
      sector 1: 115.0 to  339.0 degrees
      sector 2: 339.0 to  115.0 degrees

   Monthly surface characteristics applied by AERMET:

      Month  Sector   Albedo   Bowen ratio   Roughness z0 (m)
      -----  ------   ------   -----------   ----------------
          1       1     0.17          0.89              0.023
          2       1     0.16          0.64              0.030
          3       1     0.16          0.64              0.030
          4       1     0.16          0.64              0.030
          5       1     0.16          0.65              0.037
          6       1     0.16          0.65              0.037
          7       1     0.16          0.65              0.037
          8       1     0.16          0.65              0.037
          9       1     0.16          0.65              0.037
         10       1     0.16          0.89              0.031
         11       1     0.16          0.89              0.031
         12       1     0.17          0.89              0.023
          1       2     0.17          0.89              0.150
          2       2     0.16          0.64              0.186
          3       2     0.16          0.64              0.186
          4       2     0.16          0.64              0.186
          5       2     0.16          0.65              0.218
          6       2     0.16          0.65              0.218
          7       2     0.16          0.65              0.218
          8       2     0.16          0.65              0.218
          9       2     0.16          0.65              0.218
         10       2     0.16          0.89              0.195
         11       2     0.16          0.89              0.195
         12       2     0.17          0.89              0.150

------------------------------------------------------------------------------
4. SURFACE DATA QUALITY CONTROL
------------------------------------------------------------------------------
   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            57793
   Rejected, NCEI suspect/erroneous 315
   Rejected, METAR cross-check      3
   Full detail                      KHKS_GHCNh_2021_2025_qc_log.txt

------------------------------------------------------------------------------
5. ANNUAL PROCESSING STATISTICS (from AERMET .RP2)
------------------------------------------------------------------------------
   Year 2021
      Upper air soundings 743 | Surface obs 8782 | 1-min ASOS hrs 8784
      Calms 228 | Variable winds 36 | Cloud subs 8 | Temp subs 4
      Errors 0 | Warnings 359
   Year 2022
      Upper air soundings 774 | Surface obs 8783 | 1-min ASOS hrs 8784
      Calms 218 | Variable winds 39 | Cloud subs 7 | Temp subs 5
      Errors 0 | Warnings 356
   Year 2023
      Upper air soundings 758 | Surface obs 8769 | 1-min ASOS hrs 8784
      Calms 610 | Variable winds 107 | Cloud subs 13 | Temp subs 8
      Errors 0 | Warnings 358
   Year 2024
      Upper air soundings 754 | Surface obs 8781 | 1-min ASOS hrs 8808
      Calms 342 | Variable winds 49 | Cloud subs 28 | Temp subs 19
      Errors 0 | Warnings 357
   Year 2025
      Upper air soundings 738 | Surface obs 8342 | 1-min ASOS hrs 8760
      Calms 332 | Variable winds 47 | Cloud subs 37 | Temp subs 46
      Errors 0 | Warnings 356

------------------------------------------------------------------------------
6. DATA COMPLETENESS
------------------------------------------------------------------------------
   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    99.8%    99.2%    99.9%    99.3%      99.6%   PASS
      2022    99.4%    99.0%    99.7%    99.8%      99.5%   PASS
      2023    99.1%    98.4%    97.4%    98.6%      98.3%   PASS
      2024    94.4%    97.9%    99.1%    98.4%      97.5%   PASS
      2025    97.3%    94.9%    91.5%    88.9%      93.1%   FAIL

------------------------------------------------------------------------------
7. PHYSICAL PLAUSIBILITY OF THE DELIVERED FILES
------------------------------------------------------------------------------
   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     12.1 m/s   -10.0 C    36.1 C           0                0
      2022     13.4 m/s   -17.2 C    37.2 C           0                0
      2023     12.9 m/s    -3.9 C    39.4 C           0                0
      2024     11.3 m/s   -12.2 C    37.8 C           0                0
      2025     13.2 m/s   -10.0 C    36.7 C           0                0

------------------------------------------------------------------------------
8. CALMS AND MISSING DATA
------------------------------------------------------------------------------
   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        228            39        8721
      2022        217            45        8715
      2023        610           145        8615
      2024        337           223        8561
      2025        332           603        8157

------------------------------------------------------------------------------
9. OUTPUT FILES
------------------------------------------------------------------------------
   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
      --------------------   ---------   -----   --------------------------------
      KHKS2021.sfc                1.47    8784   958f1fbc2a91d22a381c5f09e28f1adc
      KHKS2021.pfl                0.57       -   dea980f10fd5e1591eae0bbd5bae3a3f
      KHKS2021US.sfc              1.47    8784   cc0ef4492beb43cfed35421d8c7a178a
      KHKS2021US.pfl              0.57       -   dea980f10fd5e1591eae0bbd5bae3a3f
      KHKS2022.sfc                1.47    8784   aee00de3a917bfe4876b55e491b07ba3
      KHKS2022.pfl                0.57       -   775ca578e44e05a428134bdc22daadc1
      KHKS2022US.sfc              1.47    8784   f70b572e342df91b0f9c7dec3df90b79
      KHKS2022US.pfl              0.57       -   775ca578e44e05a428134bdc22daadc1
      KHKS2023.sfc                1.47    8784   26f950619af0e2fd751b338f6029e29d
      KHKS2023.pfl                0.57       -   8e1fd083d7e0f006849949a81443c568
      KHKS2023US.sfc              1.47    8784   813fcd73808ee5cb66310df06a978266
      KHKS2023US.pfl              0.57       -   8e1fd083d7e0f006849949a81443c568
      KHKS2024.sfc                1.48    8808   d6465e934e53fb4c646191f856ec9ddc
      KHKS2024.pfl                0.57       -   7d1d6e52fcecc756f2a36e7cccb7f5c8
      KHKS2024US.sfc              1.48    8808   b55719b2b19629a08ca427671ee0be15
      KHKS2024US.pfl              0.57       -   7d1d6e52fcecc756f2a36e7cccb7f5c8
      KHKS2025.sfc                1.47    8784   7a7b57b6387a3dc64ab5cb1d8e18818b
      KHKS2025.pfl                0.57       -   3462859a154274733abf5442321de4dd
      KHKS2025US.sfc              1.47    8784   084d3952bb9a8d1fd1f131dd9f779a1b
      KHKS2025US.pfl              0.57       -   3462859a154274733abf5442321de4dd

==============================================================================
End of report -- KHKS 2021-2025
==============================================================================
