Winter '24 / '25 - Snow Storm #2: Preliminary STP Verifications

NYC - West Broadway at Spring Street
(1983)

Preliminary verification of storm-total snowfalls for SUN and MON based on reporting from CDUS41 (CLI) ... CXUS51 (CF6) ... METARs ... and PNS bulletins issued by NWS.

Good coverage for station snowfalls but spotty/questionable reporting of melt water.

---
Missing/questionable melt-water values precludes accurate SLR calculations for some stations

HYA
STP derived from inverse distanced-weighted scheme based on vicinity reports from PNSBOX.

---

Summary SLR value is quantity-weighted.
Stations with SLR < 8 are not reported b/c of contamination from liquid or freezing precipitation.

---
Stations observing >= Trace:  24 (89%)
Stations observing > Trace:  22 (81%)

Given a station had measurable snowfall; stations observing at least:
- uncertain b/c multiple stations have missing or questionable melt-water data

MAX snow melt-water (minimum SLR 8:1)
- uncertain b/c multiple stations have missing or questionable melt-water data

MAX precipitation (frozen + freezing + liquid)
- uncertain b/c multiple stations have missing or questionable melt-water data

---
New daily snowfall record(s)
None

---
Daily snowfall data table

ORANGE: new daily record
GREY:  STP derived from PNS or METARs or inverse distance weighting

Trace amounts (displayed as 0.05") are not included in STP or SLR calculations.

---
Areal distribution of storm-total snowfall

Image courtesy NOHRSC
https://www.nohrsc.noaa.gov/

---
SFC analysis:  21z ... 19-JAN-25

Image courtesy DOC / NOAA / NWS / NCEP / WPC
https://www.wpc.ncep.noaa.gov/html/avnsfc.shtml

---
Please report any errors in Comments along with a link to the correct data.
FINAL results expected NLT WED evening on or about 9 PM ET.