Alert archive / Michigan / River Flood Warnings in 2018

River Flood Warning 4, NWS Detroit, MI

February 20, 2018Saginaw County, Shiawassee County, Michigan

NWS Detroit, MI issued this river flood warning at Feb 20, 2018, 10:45 AM EST for Saginaw County, Shiawassee County, Michigan. It took effect at Feb 20, 2018, 12:24 PM EST. It was in force for 7 days.

The area

The counties it named.

The facts

Issued: Feb 20, 2018, 10:45 AM EST (15:45 UTC)
In effect from: Feb 20, 2018, 12:24 PM EST
Expired: Feb 27, 2018, 5:43 AM EST
In force: 7 days
Issued by: NWS Detroit, MI
Area: Storm-based polygon
Flood severity: Minor

Counties Saginaw County, MI, Shiawassee County, MI

The radar

The Detroit radar (KDTX), 71 km from the middle of the area, began a volume at 15:48 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The river

Written for the forecast point Shiawassee River at Owosso (OWOM4).

Action stage: 6 ft
Minor stage: 7 ft
Moderate stage: 9 ft
Major stage: 10 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 04144500, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.

What forecasters said that day

The local office's own words before this river flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Detroit, MI wrote its last area forecast discussion before this river flood warning went out at Feb 20, 10:37 AM EST, 8 minutes earlier.

Area forecast discussion, Feb 20, 10:37 AM EST, 8 minutes before

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Hazardous weather outlook, Feb 20, 4:05 AM EST, 6 hours 40 minutes before

Hazardous Weather Outlook
National Weather Service Detroit/Pontiac MI
405 AM EST Tue Feb 20 2018

MIZ047>049-053>055-060>063-068>070-075-076-082-083-211000-
Midland-Bay-Huron-Saginaw-Tuscola-Sanilac-Shiawassee-Genesee-Lapeer-
St. Clair-Livingston-Oakland-Macomb-Washtenaw-Wayne-Lenawee-Monroe-
405 AM EST Tue Feb 20 2018

This hazardous weather outlook is for portions of southeast
Michigan.

.DAY ONE...Today and Tonight

A flood watch is in effect today and tonight. See the latest flood
watch statement for additional detail.

There will be a chance of thunderstorms today and tonight as a low
pressure system moves through ahead of a slowly advancing cold front.
These storms are not expected to be severe.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

A flood watch is in effect through Wednesday afternoon.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today and tonight.

LCZ460-LEZ444-LHZ361>363-421-422-441>443-462>464-211000-
Lake St Clair-
Michigan Waters of Lake Erie from Detroit River to North Cape MI-
Lake Huron from 5NM east of Mackinac Bridge to Presque Isle Lt
beyond 5 NM off shore-
Lake Huron from Presque Isle Light to Sturgeon Point MI beyond 5NM
off shore-
Lake Huron from Sturgeon Point to Alabaster MI beyond 5NM off shore-
Outer Saginaw Bay SW of Alabaster to Port Austin MI to Inner Saginaw
Bay-Inner Saginaw Bay SW of Point Au Gres to Bay Port MI-
Port Austin to Harbor Beach MI-Harbor Beach to Port Sanilac MI-
Port Sanilac to Port Huron MI-
Lake Huron from Port Austin to Harbor Beach beyond 5NM Off Shore-
Lake Huron from Harbor Beach to Port Sanilac beyond 5NM Off Shore-
Lake Huron from Port Sanilac to Port Huron beyond 5NM Off Shore-
405 AM EST Tue Feb 20 2018

This hazardous weather outlook is for portions of Lake Erie, Lake
Huron and Lake St Clair.

.DAY ONE...Today and Tonight

There will be a chance of thunderstorms today and tonight as a low
pressure system moves through ahead of a slowly advancing cold front.
These storms are not expected to be severe.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today and tonight.

You can obtain your latest National Weather Service forecasts online
at www.weather.gov/detroit.

DRK

In the hours before

Local storm report, Feb 20, 7:53 AM EST, 2 hours 52 minutes before

PRELIMINARY LOCAL STORM REPORT
National Weather Service Detroit/Pontiac MI
753 AM EST TUE FEB 20 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0500 AM     HEAVY RAIN       DEARBORN                42.31N 83.21W
02/20/2018  M1.40 INCH       WAYNE              MI   CO-OP OBSERVER

            24 HOUR RAINFALL TOTAL.

0500 AM     HEAVY RAIN       1 ENE ROSEVILLE         42.51N 82.92W
02/20/2018  M1.06 INCH       Macomb             MI   COCORAHS

            24 HOUR RAINFALL TOTAL.

0515 AM     HEAVY RAIN       MANCHESTER              42.15N 84.04W
02/20/2018  M1.45 INCH       WASHTENAW          MI   CO-OP OBSERVER

            24 HOUR RAINFALL TOTAL.

0630 AM     HEAVY RAIN       OIL CITY                43.61N 84.59W
02/20/2018  M1.13 INCH       Midland            MI   CO-OP OBSERVER

            24 HOUR RAINFALL TOTAL.

0658 AM     HEAVY RAIN       ANN ARBOR               42.28N 83.73W
02/20/2018  M1.41 INCH       WASHTENAW          MI   CO-OP OBSERVER

            24 HOUR RAINFALL TOTAL.

0700 AM     HEAVY RAIN       3 SW BLOOMFIELD TOWNSHI 42.54N 83.30W
02/20/2018  M1.28 INCH       Oakland            MI   COCORAHS

            24 HOUR RAINFALL TOTAL.

0700 AM     HEAVY RAIN       5 SSW CANTON            42.24N 83.53W
02/20/2018  M1.39 INCH       Wayne              MI   ASOS

            24 HOUR RAINFALL TOTAL MEASURED AT WILLOW RUN AIRPORT.

0700 AM     HEAVY RAIN       ROMULUS                 42.22N 83.37W
02/20/2018  M1.42 INCH       Wayne              MI   ASOS

            24 HOUR RAINFALL TOTAL MEASURED AT DETROIT METRO AIRPORT.

0700 AM     HEAVY RAIN       6 NNE DOWNTOWN DETROIT  42.41N 83.01W
02/20/2018  M1.18 INCH       Wayne              MI   ASOS

            24 HOUR RAINFALL TOTAL MEASURED AT DETROIT CITY AIRPORT.

0700 AM     HEAVY RAIN       SSE SHELBY TOWNSHIP     42.67N 83.03W
02/20/2018  M1.20 INCH       Macomb             MI   COCORAHS

            24 HOUR RAINFALL TOTAL.

0700 AM     HEAVY RAIN       OWOSSO                  43.00N 84.18W
02/20/2018  M1.09 INCH       SHIAWASSEE         MI   CO-OP OBSERVER

            24 HOUR RAINFALL TOTAL.

&&

TF

Local storm report, Feb 20, 9:28 AM EST, 1 hour 17 minutes before

PRELIMINARY LOCAL STORM REPORT
National Weather Service Detroit/Pontiac MI
928 AM EST TUE FEB 20 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0650 AM     HEAVY RAIN       TECUMSEH                42.01N 83.94W
02/20/2018  M1.02 INCH       LENAWEE            MI   CO-OP OBSERVER

            24 HOUR RAINFALL TOTAL.

0653 AM     HEAVY RAIN       2 NNE WIXOM             42.55N 83.52W
02/20/2018  M1.25 INCH       Oakland            MI   TRAINED SPOTTER

            20 HOUR RAINFALL TOTAL.

0700 AM     HEAVY RAIN       1 N WHITMORE LAKE       42.44N 83.75W
02/20/2018  M1.31 INCH       Livingston         MI   CO-OP OBSERVER

            24 HOUR RAINFALL TOTAL.

0800 AM     HEAVY RAIN       4 SW SALINE             42.13N 83.84W
02/20/2018  M1.36 INCH       Washtenaw          MI   CO-OP OBSERVER

            24 HOUR RAINFALL TOTAL.

0800 AM     HEAVY RAIN       WYANDOTTE               42.21N 83.16W
02/20/2018  M1.23 INCH       WAYNE              MI   CO-OP OBSERVER

            24 HOUR RAINFALL TOTAL.

0800 AM     HEAVY RAIN       6 WNW DURAND            42.95N 84.10W
02/20/2018  M1.20 INCH       Shiawassee         MI   COCORAHS

            24 HOUR RAINFALL TOTAL.

0800 AM     HEAVY RAIN       5 E PINCKNEY            42.45N 83.85W
02/20/2018  M1.35 INCH       Livingston         MI   COCORAHS

            24 HOUR RAINFALL TOTAL.

0812 AM     HEAVY RAIN       BURT                    43.24N 83.91W
02/20/2018  M1.50 INCH       SAGINAW            MI   BROADCAST MEDIA

            21 HOUR RAINFALL TOTAL.

0815 AM     HEAVY RAIN       2 WNW TIPTON            42.03N 84.10W
02/20/2018  M1.30 INCH       Lenawee            MI   CO-OP OBSERVER

            24 HOUR RAINFALL TOTAL.

0820 AM     HEAVY RAIN       1 W PORT HURON          42.99N 82.45W
02/20/2018  M1.01 INCH       St. Clair          MI   COCORAHS

            24 HOUR RAINFALL TOTAL.

0830 AM     HEAVY RAIN       WNW PLEASANT RIDGE      42.47N 83.14W
02/20/2018  M1.15 INCH       Oakland            MI   COCORAHS

            24 HOUR RAINFALL TOTAL.

0859 AM     HEAVY RAIN       OAKLEY                  43.14N 84.17W
02/20/2018  M1.40 INCH       SAGINAW            MI   TRAINED SPOTTER

            21 HOUR RAINFALL TOTAL.

0900 AM     HEAVY RAIN       3 SSE WATERFORD         42.62N 83.37W
02/20/2018  M1.37 INCH       Oakland            MI   COCORAHS

            24 HOUR RAINFALL TOTAL.

&&

TF

Local storm report, Feb 20, 10:05 AM EST, 40 minutes before

PRELIMINARY LOCAL STORM REPORT
National Weather Service Detroit/Pontiac MI
1005 AM EST TUE FEB 20 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0900 AM     HEAVY RAIN       GARDEN CITY             42.33N 83.33W
02/20/2018  M1.52 INCH       Wayne              MI   TRAINED SPOTTER

            33 HOUR RAINFALL TOTAL.

1000 AM     HEAVY RAIN       2 SSW CLARKSTON         42.71N 83.44W
02/20/2018  M1.34 INCH       Oakland            MI   TRAINED SPOTTER

            23 HOUR RAINFALL TOTAL.

&&

TF

The office that day

Everything else NWS Detroit, MI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 20, 10:30 AM EST	River Flood Warning	DTX	Macomb	44 hr
Feb 20, 10:30 AM EST	River Flood Warning	DTX	Wayne	56 hr
Feb 20, 10:30 AM EST	River Flood Warning	DTX	Wayne	69 hr
Feb 20, 10:45 AM EST	River Flood Warning	DTX	Genesee	5 days
Feb 20, 4:15 PM EST	River Flood Warning	DTX	Genesee, Saginaw	57 hr
Feb 20, 4:15 PM EST	River Flood Warning	DTX	Midland, Saginaw	3 days
Feb 20, 4:15 PM EST	River Flood Warning	DTX	Genesee	37 hr
Feb 20, 4:15 PM EST	River Flood Warning	DTX	Bay, Saginaw	9 days
Feb 20, 4:15 PM EST	River Flood Warning	DTX	Washtenaw	60 hr
Feb 20, 4:15 PM EST	River Flood Warning	DTX	Oakland, Wayne	33 hr
Feb 20, 6:41 PM EST	Special Weather Statement	DTX	Genesee, Livingston, Shiawassee, Tuscola	49 min

Nearby

River Flood Warnings in Michigan, 2018 Every river flood warning in 2018

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive; the gauge from the NWS water service and the USGS.