fill missing values in MRD and MSLP

[ghost]

closes #26

[codecov]

Codecov Report

Merging #31 (c4b55aa) into main (1a32b4a) will decrease coverage by 0.04%.
The diff coverage is 97.05%.

❗ Current head c4b55aa differs from pull request most recent head beae18f. Consider uploading reports for the commit beae18f to get more accurate results

@@            Coverage Diff             @@
##             main      #31      +/-   ##
==========================================
- Coverage   90.66%   90.62%   -0.05%     
==========================================
  Files          22       22              
  Lines        2079     2079              
==========================================
- Hits         1885     1884       -1     
- Misses        194      195       +1     

Impacted Files	Coverage Δ
stormevents/nhc/track.py	91.00% <96.61%> (-0.31%)	⬇️
stormevents/nhc/atcf.py	87.79% <100.00%> (+0.36%)	⬆️
tests/test_nhc.py	100.00% <100.00%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 1a32b4a...beae18f. Read the comment docs.

[WPringle]

@zacharyburnettNOAA Please also see comment I made on #30.
There are many zero forecast hour OFCL and CARQ's in the advisory file, we first need to parse out which one we need (same initial forecast datetime).