National Weather Service Detroit/Pontiac, MI http://www.weather.gov/dtx Email: [email protected] US National Weather Service Detroit/Pontiac Michigan @NWSDetroit Weather Briefing November 12, 2015 6:00 AM
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National Weather Service Detroit/Pontiac, MI
http://www.weather.gov/dtx Email: [email protected]
US National Weather Service Detroit/Pontiac Michigan
@NWSDetroit
Weather Briefing November 12, 2015 6:00 AM
Forecast Wind Gusts Expected Thursday
weather.gov/detroit
Strong Winds Expected Strongest Winds Today, Still Windy Friday
How strong will winds get Thursday?
Wind Speeds: Sustained 20 to 30 mph. • Gusts up to 60 mph along/south of I-69 corridor. • Gusts 40-50 mph Saginaw Valley
and Northern Thumb. Direction: Southwest
When on Thursday?
Through this evening
Why will this happen?
A low pressure system and cold front will bring a long period of windy weather Thursday and Friday. Very strong winds are expected Thursday, especially along and south of I-69.
Gusts 45 to 60 mph through the evening
Wind Advisory
High Wind Warning Gale Warning
High Wind Watch Gale Watch
Storm Warning Small Craft Advisory
Storm Watch
Low Water Advisory
Lakeshore Flood Warning
LAND HAZARDS
MARINE HAZARDS (USA ONLY)
Strong Winds Expected Wind-Related Weather Headlines for Today
*HIGH WIND WARNING AND WIND ADVISORY THIS MORNING THROUGH THE EVENING *LAKESHORE FLOOD WARNING THIS MORNING THROUGH THE EVENING
High potential for gusts to 30 mph.
High potential for gusts to 40 mph.
Start This morning
Peak Late morning-evening
End Strongest winds end this evening, but it will remain fairly windy through Friday.
Probability for Strong Wind Gusts in the Detroit Area
High potential for gusts to 50 mph.
Weather Briefing Probability of Strong Wind Gusts: Detroit
Low-medium potential for gusts to 60 mph.
High potential for gusts to 30 mph. High potential for gusts to 40 mph.
Start This morning
Peak Late morning-evening
End Strongest winds end this evening, but it will remain fairly windy through Friday.
Probability for Strong Wind Gusts in the Flint Area
Medium potential for gusts to 50 mph.
Weather Briefing Probability of Strong Wind Gusts: Flint
Weather Briefing Strong Winds Will Cause Lakeshore Flooding
Recent Water Levels
Lake St. Clair: 30 inches above chart datum
Impacts
Strong southwest winds will pile up water over the north half of Lake St. Clair. The rise in water levels combined with waves of 2-3 feet will cause flooding along the lakeshore as water levels rise above the flood stage of 55 inches above chart datum.
LAKESHORE FLOOD WARNING for St. Clair County
Lakeshore Flood Warning
What Long-duration of windy conditions Thursday and Friday. Strongest winds are expected Thursday, especially along and south of I-69.
Direction: Southwest Thursday. Sustained Speeds (Thursday): 20-30 mph. Gusts (Thursday): Up to 60 mph along/south of I-69, 40-50 mph Saginaw Valley and Northern Thumb.
When Thursday and Friday. Highest speeds Thursday.
Where All of Southeast Michigan
Forecast Confidence
High confidence with gusts 45-60 mph Thursday. High confidence with gusts to 40 mph Friday.
Winds of this speed may
cause:
• Downed power lines • Large tree limbs falling • Loose objects blown around • Driving difficulties, especially high profile vehicles • Flooding along the Lake St. Clair shoreline in St. Clair County, including Harsens Island
Event Summary: Strong Winds Strongest Winds Thursday, Still Windy Friday
Forecast Highlights
• Windy conditions continue through Friday evening, with gusts up to 40 mph.
• Wind chills remaining in the 30s Friday. • Numerous rain/snow showers Friday, ending by evening. • Dry over the weekend. • Winds decrease for the weekend (10-15 mph with gusts to
20 mph both Saturday and Sunday).
Storm Recovery Forecast After the Storm
weather.gov/detroit
Forecast for the Detroit-Area
Additional Information
NWS Detroit/Pontiac, MI http://www.weather.gov/dtx
Email: [email protected]
Current Watches, Warnings, Advisories http://www.weather.gov/dtx/dtxhazards
Great Lakes Marine Portal http://weather.gov/greatlakes
Michigan Weather Safety Information http://www.weather.gov/dtx/weather_preparedness
National Weather Safety Page http://www.weather.gov/safety
US National Weather Service Detroit/Pontiac Michigan
@NWSDetroit
National Weather Service Detroit/Pontiac, MI
http://www.weather.gov/dtx Email: [email protected]
US National Weather Service Detroit/Pontiac Michigan
@NWSDetroit
Marine Weather Briefing November 12, 2015 6:00 AM
How strong will winds get?
Wind Speeds: Sustained 25 to 30 knots. Gusts to 50 knots for Lake St. Clair and Erie. Gusts 40 to 45 knots elsewhere. Direction: Southwest turning West
When
Today into Friday Night. Peak winds through this evening.
Why will this happen?
A low pressure system and cold front will bring a prolonged period of strong winds to Southeast Michigan. The strongest winds are expected Thursday.
Gale Warning
Gale Watch
Storm Warning Small Craft Advisory
Storm Watch
Low Water Advisory
MARINE HAZARDS (USA ONLY)
Prolonged Period of Strong Winds Expected Today through Friday Night
Wave Heights at 4AM Friday Wind Gusts at 4AM Friday
GALE WARNING in effect for CENTRAL/SOUTHERN HURON this morning-Friday Evening Winds and wave heights peaking over Central/Southern Huron Thursday afternoon-overnight
5 10 15
Marine Weather Briefing Central/Southern Lake Huron
High potential of gusts of 33 Knots.
Medium-High potential of gusts to 42 Knots.
Start Gales develop this morning
Peak This afternoon thru tonight
End Gales end by Friday evening
Probabilistic Wind Forecast for Southern Lake Huron
Marine Weather Briefing Probability of Strong Wind Gusts: Southern Huron
Wind Gusts at 4PM Today Wave Heights at 4PM Thursday
STORM WARNING in effect for LAKES ST CLAIR AND WESTERN ERIE Through this Evening
Winds and wave heights peaking this afternoon-early evening
Marine Weather Briefing Lake St. Clair and Extreme Western Lake Erie
High potential of gusts of 33 Knots. High potential of gusts to 42 Knots.
Start Strong winds develop this morning
Peak This morning through evening (STORM FORCE GUSTS)
End Strongest winds end by this evening. Gales possible again Friday.
Probabilistic Wind Forecast for Western Lake Erie
Medium-High potential for gusts to 48 knots
Marine Weather Briefing Probability of Strong Wind Gusts: Western Erie
Lake Huron Lake Erie
Strong winds will change water levels by pushing water to the downwind side of the lake.
Water level drops up to 2 feet over Southern Lake Huron by Thursday afternoon. A LOW WATER ADVISORY IS IN EFFECT FOR SAGINAW BAY.
Water level drops 5-6 feet over Western Lake Erie by Thursday evening. A LOW WATER ADVISORY IS IN EFFECT FOR WESTERN LAKE ERIE.
Marine Weather Briefing Water Levels
Weather Briefing Strong Winds Will Cause Lakeshore Flooding
Recent Water Levels
Lake St. Clair: 30 inches above chart datum
Impacts
Strong southwest winds will pile up water over the north half of Lake St. Clair. The rise in water levels combined with waves of 2-3 feet will cause flooding along the lakeshore as water levels rise above the flood stage of 55 inches above chart datum.
LAKESHORE FLOOD WARNING for St. Clair County
Lakeshore Flood Warning
What • Strong winds developing this morning and continuing into Friday • Peak gusts of 40 to 50 knots. • Strongest winds over West Lake Erie, Lake St Clair (Storm Force gusts) • Gales will continue into Friday for most of the area
When This morning through Friday
Where Lake Huron, Western Lake Erie, Lake St. Clair
Forecast Confidence
High confidence with wind gusts 40 to 50 knots Today. High confidence with gales Southern Lake Huron Friday, medium confidence elsewhere.
Impacts from Winds:
• Wave Heights up to 4 feet on Lake St. Clair • Wave Heights up to 7 feet on Western Lake Erie • Wave Heights up to 13 feet on Lake Huron • Low water conditions on both Western Lake Erie and Southern Lake Huron • Possible flooding along the Lake St. Clair shoreline in St. Clair County, including Harsens Island
Marine Weather Briefing Event Summary (U.S. Waters Only)
Additional Information
NWS Detroit/Pontiac, MI http://www.weather.gov/dtx
Email: [email protected]
Current Watches, Warnings, Advisories http://www.weather.gov/dtx/dtxhazards
Great Lakes Marine Portal http://weather.gov/greatlakes
National Data Buoy Center http://www.ndbc.noaa.gov/?lat=44.805858&lon=-
83.723145&zoom=6&type=h&status=r&pgm=&op=&ls=false
National Weather Safety Page http://www.weather.gov/safety
US National Weather Service Detroit/Pontiac Michigan
@NWSDetroit
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