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AERMET PROCESSING VERIFICATION REPORT -- KTVR (VICKSBURG/TALLULAH RGNL AP)
Period 2021-2025   |   Generated 2026-07-26 17:21:24
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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.

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1. STATION
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   Surface station      KTVR  VICKSBURG/TALLULAH RGNL AP, LA
   ICAO / WBAN / USAF   KTVR / 03996 / 722488
   GHCNh station ID     USW00003996
   Latitude, longitude  32.3480 N, 91.0300 W
   Elevation            25.2 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           89 km E of KTVR

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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     32.348056, -91.030000  (NAD83)
   Surface moisture     Average;  Arid: N
   Continuous snow      N
   Non-airport sectors  1
   Sectors              2
      sector 1: 165.0 to  359.0 degrees
      sector 2: 359.0 to  165.0 degrees

   Monthly surface characteristics applied by AERMET:

      Month  Sector   Albedo   Bowen ratio   Roughness z0 (m)
      -----  ------   ------   -----------   ----------------
          1       1     0.16          0.45              0.034
          2       1     0.14          0.26              0.045
          3       1     0.14          0.26              0.045
          4       1     0.14          0.26              0.045
          5       1     0.18          0.36              0.193
          6       1     0.18          0.36              0.193
          7       1     0.18          0.36              0.193
          8       1     0.18          0.36              0.193
          9       1     0.18          0.36              0.193
         10       1     0.18          0.45              0.192
         11       1     0.18          0.45              0.192
         12       1     0.16          0.45              0.034
          1       2     0.16          0.45              0.019
          2       2     0.14          0.26              0.021
          3       2     0.14          0.26              0.021
          4       2     0.14          0.26              0.021
          5       2     0.18          0.36              0.029
          6       2     0.18          0.36              0.029
          7       2     0.18          0.36              0.029
          8       2     0.18          0.36              0.029
          9       2     0.18          0.36              0.029
         10       2     0.18          0.45              0.027
         11       2     0.18          0.45              0.027
         12       2     0.16          0.45              0.019

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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            56890
   Rejected, NCEI suspect/erroneous 120
   Rejected, METAR cross-check      0
   Full detail                      KTVR_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 8741 | 1-min ASOS hrs 8784
      Calms 155 | Variable winds 30 | Cloud subs 18 | Temp subs 7
      Errors 0 | Warnings 358
   Year 2022
      Upper air soundings 774 | Surface obs 8653 | 1-min ASOS hrs 8784
      Calms 104 | Variable winds 19 | Cloud subs 37 | Temp subs 12
      Errors 0 | Warnings 352
   Year 2023
      Upper air soundings 758 | Surface obs 8684 | 1-min ASOS hrs 8784
      Calms 478 | Variable winds 132 | Cloud subs 67 | Temp subs 16
      Errors 0 | Warnings 357
   Year 2024
      Upper air soundings 754 | Surface obs 8427 | 1-min ASOS hrs 8808
      Calms 617 | Variable winds 112 | Cloud subs 97 | Temp subs 42
      Errors 0 | Warnings 348
   Year 2025
      Upper air soundings 738 | Surface obs 8637 | 1-min ASOS hrs 8760
      Calms 495 | Variable winds 71 | Cloud subs 19 | Temp subs 23
      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    97.3%    99.5%    99.9%    99.8%      99.1%   PASS
      2022    99.7%    99.5%    96.5%    97.3%      98.2%   PASS
      2023    99.4%    92.2%    96.1%    99.5%      96.8%   PASS
      2024    99.5%    84.8%    95.8%    97.3%      94.4%   FAIL
      2025    99.4%    99.5%    93.5%    98.3%      97.7%   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    -7.2 C    38.2 C           0                0
      2022     16.3 m/s   -11.1 C    37.8 C           0                0
      2023     12.7 m/s    -3.9 C    41.1 C           0                0
      2024     12.2 m/s   -13.3 C    38.9 C           0                0
      2025     11.7 m/s   -11.1 C    41.1 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        155            75        8685
      2022        104           155        8605
      2023        478           280        8480
      2024        617           494        8290
      2025        495           205        8555

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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
      --------------------   ---------   -----   --------------------------------
      KTVR2021.sfc                1.47    8784   c67cf8be1b1f85642b0698e5231a909e
      KTVR2021.pfl                0.57       -   610dcc8de862b5ffaf054b2818054860
      KTVR2021US.sfc              1.47    8784   3376c5b7af0c0e7f3dca3ab396a35b04
      KTVR2021US.pfl              0.57       -   610dcc8de862b5ffaf054b2818054860
      KTVR2022.sfc                1.47    8784   8d92abd48b6a10a9bee6dad94a62cf4f
      KTVR2022.pfl                0.57       -   411736ce3acc0cbab9e6434baa6f9b80
      KTVR2022US.sfc              1.47    8784   f7679bc1cda177595df227207da92564
      KTVR2022US.pfl              0.57       -   411736ce3acc0cbab9e6434baa6f9b80
      KTVR2023.sfc                1.47    8784   6596851c4a62da1843ae24f51dbf0d66
      KTVR2023.pfl                0.57       -   39da125cc079f305208430f1bb18819e
      KTVR2023US.sfc              1.47    8784   d4a16e25590a0549519c84773aebe9c2
      KTVR2023US.pfl              0.57       -   39da125cc079f305208430f1bb18819e
      KTVR2024.sfc                1.48    8808   36b51dba146b74412d4afc6ad6a6ae8a
      KTVR2024.pfl                0.57       -   d4f7b37cc48a74b36bc10eb6e6b07157
      KTVR2024US.sfc              1.48    8808   d177185fe7228b608245ea3651bfd6e9
      KTVR2024US.pfl              0.57       -   d4f7b37cc48a74b36bc10eb6e6b07157
      KTVR2025.sfc                1.47    8784   925af39ba662c59ce1d7a7d7c30a8c32
      KTVR2025.pfl                0.57       -   847b914dab4afb2097eed026d8281db0
      KTVR2025US.sfc              1.47    8784   2228f21f1b4a5927f2f9d2ad66a03e6d
      KTVR2025US.pfl              0.57       -   847b914dab4afb2097eed026d8281db0

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End of report -- KTVR 2021-2025
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