Overview
A low pressure system developed along a frontal boundary draped across the Midwest and moved northeastward through southeast Michigan on the morning of January 29th. As this system approached during the afternoon and evening of January 28th, a lead wing of isentropic ascent and warm air advection brought the onset of accumulating snowfall across central and northern portions of southeast Michigan. Throughout the night intensity of snowfall increased for areas north of I-69. A corridor of stronger frontal forcing along with thermal profiles conducive for periods of heavy snow developed moved into the Tri-Cities during the early morning hours bringing snowfall rates up to an inch per hour for several hours and reaching a storm total snowfall of 7-8 inches in parts of the Tri-Cities.
A sharp gradient in snowfall totals developed with a significant drop off for areas south of I-69 as dry air cut into the totals along and south of the rain/snow line. There were points mainly along and south of the I-94 corridor that experienced a period of light wintry mix and light freezing rain during the morning hours of January 29th as surface air temperatures held at or below freezing. Snowfall totals for areas south of I-69 were around an inch or less before precipitation ended during the mid-morning hours.
Snow Totals
STORM TOTAL SNOW REPORTS
LOCATION SNOWFALL DURATION
(INCHES) (HOURS) LAT LON
...MIDLAND COUNTY...
2 E MIDLAND M 7.0 16 43.62N 84.19W
...SAGINAW COUNTY...
2 SW SAGINAW M 6.0 16 43.40N 83.98W
8 NW SAGINAW M 6.2 24 43.50N 84.06W
5 E HEMLOCK M 8.0 16 43.42N 84.13W
...SANILAC COUNTY...
2 W PECK M 6.5 16 43.26N 82.86W
...BAY COUNTY...
AUBURN M 4.5 24 43.60N 84.08W
BAY CITY M 4.5 14 43.59N 83.89W
2 E BAY CITY M 7.0 24 43.59N 83.85W
...GENESEE COUNTY...
LINDEN M 1.0 24 42.82N 83.78W
GOODRICH M 2.3 24 42.92N 83.51W
4 N BURTON M 4.1 24 43.05N 83.62W
5 SW FLINT M 4.7 15 42.97N 83.76W
...HURON COUNTY...
PORT AUSTIN M 4.0 24 44.04N 83.00W
BAY PORT M 4.1 12 43.85N 83.37W
5 NNW FILION M 4.4 24 43.96N 83.04W
BAD AXE M 4.7 24 43.80N 83.00W
...LAPEER COUNTY...
5 W LAPEER M 4.2 15 43.05N 83.42W
...MIDLAND COUNTY...
4 W MIDLAND M 5.2 13 43.62N 84.31W
...OAKLAND COUNTY...
1 ESE DAVISBURG M 1.0 24 42.75N 83.52W
4 E WHITE LAKE M 1.2 18 42.65N 83.43W
2 S ORTONVILLE M 1.4 24 42.82N 83.44W
...SAGINAW COUNTY...
CHESANING M 4.5 24 43.18N 84.12W
5 WSW CHESANING M 5.0 24 43.17N 84.21W
SAGINAW M 5.5 24 43.42N 83.95W
...SANILAC COUNTY...
LEXINGTON M 3.0 24 43.27N 82.53W
...SHIAWASSEE COUNTY...
DURAND M 3.0 24 42.91N 83.99W
6 WNW DURAND M 3.6 24 42.95N 84.10W
OWOSSO M 4.4 24 43.00N 84.18W
...TUSCOLA COUNTY...
CASS CITY M 4.0 24 43.60N 83.18W
VASSAR M 4.0 24 43.37N 83.58W
M = MEASURED
E = ESTIMATED
$$
Radar
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| Radar: NEXRAD mosaic base reflectivity radar loop from 11 AM Jan 28, 2023 through 9 AM Jan 29, 2023. |
Environment
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| Figure 1: Jan 28, 2023 7 PM DTX RAOB Sounding (top) and Jan 29, 2023 7 AM DTX RAOB Sounding (bottom). | Figure 2: Jan 28, 2023 7 PM WPC surface analysis map (top) and Jan 29, 2023 7 AM WPC surface analysis map (bottom). |
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Figure 3: Jan 29, 2023 4 AM 300 mb level height (black contours - m MSL), wind speed (fill - knots), and convergence (pink contours - 10^-5/s). |
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| Figure 4: Jan 29, 2023 12 AM Dendritic Growth Zone (-12C to -17Z) depth (contour - m) & RH (fill - %). | Figure 5: Jan 29, 2023 4 AM low-level (925-850 mb) 2D FGEN (purple contours - K/100 km/3 hr) mean layer height (black contours- m), and mean layer temperature (dashed contours - C). |
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