National Weather Service United States Department of Commerce

Flash flooding possible across parts of Great Basin and southern Plains

A very wet pattern will persist across the Great Basin and into the southern Plains on Tuesday. Heavy rainfall is expected from southeastern Wyoming across Colorado, northeastern New Mexico into the Texas Panhandle and western Oklahoma. Isolated rainfall rates of 1-2 inches per hour will bring a risk of flash flooding to these areas
Read More...

Hazardous Weather Conditions

25NM WSW Grand Haven MI

Marine Point Forecast [NOTICE]

This
Afternoon

Isolated Thunderstorms

WNW 10kt
1ft

High: 65 °F
Water: 63 °F

Tonight

Isolated Thunderstorms

WNW 10kt
< 1ft

Low: 60 °F

Wednesday

Mostly Sunny

NW 10kt
< 1ft

High: 65 °F

Wednesday
Night

Partly Cloudy

Light Wind
< 1ft

Low: 63 °F

Thursday

Mostly Sunny

W 10kt
< 1ft

High: 67 °F

Thursday
Night

Partly Cloudy

SSW 10kt
< 1ft

Low: 64 °F

Friday

Slight Chc Showers

SW 10kt
< 1ft

High: 68 °F

Friday
Night

Slight Chc Showers

SW 10kt
< 1ft

Low: 64 °F

Saturday

Slight Chc Showers

WNW 10kt
< 1ft

High: 70 °F

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 11:02 am CDT Jul 29, 2014
Forecast Valid: 1pm CDT Jul 29, 2014-6pm CDT Aug 4, 2014

View Nearby Observations

Detailed Forecast

WAVES ARE PROVIDED AS A RANGE OF SIGNIFICANT WAVE HEIGHTS...WHICH IS THE AVERAGE HEIGHT OF THE HIGHEST 1/3 OF THE WAVES...ALONG WITH THE AVERAGE HEIGHT OF THE HIGHEST 10 PERCENT OF THE WAVES WHICH WILL OCCASIONALLY BE ENCOUNTERED.

  • SynopsisHIGH PRESSURE OF 30.2 INCHES ACROSS THE NORTHERN AND
    CENTRAL PLAINS WILL GRADUALLY WEAKEN TO 30.0 INCHES BY WEDNESDAY
    AFTERNOON. MEANWHILE...LOW PRESSURE OF 29.9 INCHES WILL DEVELOP
    ACROSS FAR EASTERN ONTARIO BY LATE THIS AFTERNOON AND MOVE TO
    NEAR LAKE HURON BY TONIGHT. THIS LOW WILL STEER A WEAK COOL FRONT
    SOUTHWARD DOWN THE LAKE TONIGHT INTO EARLY WEDNESDAY MORNING.
    ANOTHER LOW OF SIMILAR MAGNITUDE WILL MOVE SOUTHWARD AND MERGE
    WITH THIS LOW ON WEDNESDAY. THESE LOWS WILL EVENTUALLY BECOME A
    COMBINED LOW NEAR 29.8 INCHES THAT WILL MOVE SLOWLY INTO QUEBEC ON
    THURSDAY AND INTO FRIDAY. A WEAK COOL FRONT EXTENDING FROM THIS
    LOW WILL MOVE SOUTHWARD ACROSS THE GREAT LAKES REGION FRIDAY
    NIGHT. HIGH PRESSURE OF 30.2 INCHES WILL THEN BUILD OVER THE GREAT
    LAKES REGION DURING SATURDAY NIGHT INTO SUNDAY.
  • This Afternoon WNW wind around 10 kt. Isolated thunderstorms after 5pm. Waves around 1 ft.
  • Tonight WNW wind 5 to 10 kt. Isolated showers and thunderstorms before 8pm, then isolated showers between 8pm and 4am. Waves 1 ft or less.
  • Wednesday NW wind 5 to 10 kt. Mostly sunny. Waves 1 ft or less.
  • Wednesday Night Variable winds 5 kt or less. Partly cloudy. Waves 1 ft or less.
  • Thursday W wind around 10 kt. Mostly sunny. Waves 1 ft or less.
  • Thursday Night SSW wind around 10 kt. Partly cloudy. Waves 1 ft or less.
  • Friday SW wind 5 to 10 kt. A slight chance of showers between 8am and 2pm. Waves 1 ft or less.
  • Friday Night SW wind 5 to 10 kt. A slight chance of showers. Waves 1 ft or less.
  • Saturday WNW wind 5 to 10 kt. A slight chance of showers. Waves 1 ft or less.
*Notices:
  1. This forecast is for a single location. For safety concerns, mariners should be aware of the weather over a larger area. Forecast information for a larger area can be found within the zone forecast and the NDFD graphics.
  2. The forecast conditions at a particular point may not exceed the criteria of a Small Craft Advisory, Gale, Storm etc. These watches/warnings/advisories are issued for the entire zone in which the point resides and mariners should act accordingly.