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Chicago Storm

Professional Forecaster
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  1. 2021 finished tied for the 5th warmest year on record for Chicago, with an average temperature of 53.3°. Warmest Years On Record: 1. 54.5° - 2012 2. 54.4° - 1921 3. 53.9° - 1931 4. 53.5° - 1998 5. 53.3° - 2021 5. 53.3° - 2020
  2. To add to that, the top 10 warmest Decembers list... Warmest Decembers On Record: 1. 43.3° - 1877 2. 40.7° - 1889 3. 39.7° - 1923 4. 39.0° - 2015 5. 38.4° - 1931 6. 38.0° - 2021 7. 37.8° - 1881 8. 37.7° - 1918 9. 37.4° - 1913 10. 36.7° - 1971
  3. Roundup of final totals... ORD: 4.1" Frank SW of MDW: 4.2" RFD: 4.8” LOT: 2.7" Home: 3.5” Ex home: 4.0” .
  4. Roundup as of 6z... ORD 3.2" Frank SW of MDW 3.2" MDW 2.7" RFD 4.3” LOT 2.4" .
  5. It’s been ongoing since early afternoon. You’re just able to see it a bit more now with the breaks in the synoptic snow. .
  6. Yea, parts of the CWA will pan out, while others do not.
  7. Roundup as of 0z... ORD 1.4" Frank SW of MDW 2.3" MDW 1.6" LOT 1.7" RFD 2.2"
  8. Heaviest snow of the day here at ORD so far, bordering +SN right now in this lake enhanced band. .
  9. Storm total 1.4” here at ORD thus far. .
  10. Warning is still for 5-9" in the metro.
  11. LE visible prior to the heavier synoptic returns moving in. .
  12. 0.6” here at home as I leave for ORD. .
  13. Started snowing here about 20 minutes ago. Everything is well dusted already.
  14. Given things just recently started, I’m guessing you’ll see an increase in flakes size as time goes on. Was checking some webcams to get an idea of things, and it’s ripping in Galesburg with big flakes, along with many other areas. .
  15. Both have also shifted the heavier axis of precip that has been centered around the tri-state area (IA/IL/MO border region) eastward a bit. .
  16. Numerous small/weak streamers coming in off the lake already. Should help the saturation process a bit. .
  17. Pretty much. The issues revolve around the state of the ejecting wave, among other things.
  18. Each storm system is obviously different in that regard. Depends on origin of the trough/wave, eventual ejection location and upstream setup. Some extreme example estimates, but ones I know offhand would be… GHD1, which was 95%/5% Gulf/Pacific moisture influenced, GHD2 was 25%/75% Gulf/Pacific. This current system I’d give an estimate of 15%/85% Gulf/Pacific. .
  19. Thank you. Like I said, mostly Pac driven moisture. Can also been seen on the multiple WV imagery levels, 850mb dew points, etc.
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