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Big Story Weather – September 17, 2013

September 17, 2013

redOrbit Meteorologist Joshua Kelly

Big Story Weather from September 16:

High pressure over the Great Lakes and Northeast brought another round of frost and freeze conditions to the region. The Southwest dealt with another day of heavy rainfall and flash flooding. Severe weather was limited. The largest hail was recorded in Texas at 1.0-inch. The strongest winds occurred in Montana with gusts between 60-70mph. Tropical Storm Ingrid brought heavy rainfall to Mexico and also Southern Texas.

Big Story Weather Discussion for September 17:

Surface Map: High pressure will push into the Northeast bringing another day of cooler weather with another chance of frost. Low pressure over the Southwest will bring another day of heavy rainfall to the region. Return flow will setup over the Plains bringing another day of showers and thunderstorms. The West Coast and Gulf Coast will both enjoy another nice day.

Severe Weather: There will be isolated severe storms over the Southwest. The biggest concern will be strong winds and heavy rainfall. Another area of severe weather will be possible in the Plains region. This area will mostly be heavy rainfall and strong winds. A third area will develop over portions of the Southeast US leading to a heavy rainfall potential.

Winter Weather: High pressure sliding into the Northeast will bring another evening of cool weather with the chance of seeing frost or freeze conditions to portions of the region as low temps fall into the lower 30’s.

Flooding: The Southwest will be the focus of more severe flooding. This includes the Denver Metro area along with most of New Mexico and parts of Arizona. There will also be another focus area from Idaho to Nevada with the potential for flash flooding.

Tropical Weather: Tropical Depression Ingrid will bring another day of heavy rainfall to portions of Mexico. A new tropical wave near the Yucatan Peninsula is being watched for possible tropical development this week. Tropical Storm Humberto has re-developed and will continue moving northward over the open Atlantic.

Select City Forecast:

Boston MA: Partly cloudy skies and another cool day in store as high temps rise to near 64F and the overnight lows will be near 60F.

Little Rock AR: Partly cloudy skies and mild with high temps around 85F and lows near 70F.

Sioux City IA: Partly cloudy with a few afternoon thunderstorms as high temps rise to around 79F and lows near 64F. Total rainfall around 0.15 inches.

Casper WY: Partly cloudy and mild with a high near 80F and lows near 63F.

San Diego CA: Partly cloudy and mild with a high near 78F and lows near 69F.

September 17, 2013 Storm Tracker Update:

Eastern Pacific Ocean: Low pressure moving over Western Mexico is being watched for possible tropical development. Low pressure moving over the Southwest will also bring moderate rainfall to the region. Low pressure moving into the Gulf of Alaska will bring moderate rainfall over Southern Alaska.

Atlantic Ocean: Tropical Storm Humberto has winds around 35kts and will continue to track northward over the open Atlantic. Tropical Depression Ingrid will bring another day of heavy rainfall to Mexico along with gusty winds. A new area is being watched near the Yucatan Peninsula for possible tropical development. Low pressure moving over Eastern Canada will bring showers to the region. Low pressure moving through Central Europe will bring showers to the region.

Western Pacific: Tropical Storm Usagi has winds around 35kts and pressure near 996mb. This storm will gain strength and continue moving westward towards Taiwan. There is another area to the north of Guam that is being watched for possible tropical development as well. Low pressure moving over the Kuril Islands will bring strong winds and heavy rainfall to the region.

Indian Ocean: The southwest monsoon will be very active again today over portions of India and Sri Lanka.

Southern Hemisphere: Multiple areas of low pressure moving through the basin will bring impacts to Southern Argentina with another day of rain and snow showers. A second low will bring moderate winds to Southern Africa, while a third low will bring showers to southwest Australia.

Five-Day Storm Index Outlook for September 17-21:

Boston MA: The region will start out impact free. By the 20th a cold front moving through the region will bring slight to moderate impacts to the area.

Little Rock AR: The region will have slight to moderate impacts around the 18th and 19th. Otherwise the rest of the period will be impact free.

Sioux City IA: The region will have slight impacts this afternoon followed by the remainder of the week being impact free.

Casper WY: The period will start impact free. There is a chance for thunderstorms near the end of the period which will bring slight to moderate impacts to the area.

San Diego CA: The next five days will be impact free for the region.

Climate Watch for September 12-16:

Boston MA: The period started with temps around 2-14 degrees above normal and then finished the period with temps around 1-5 degrees below normal.

Little Rock AR: The region started with temps around 1-8 degrees above normal followed by temps around 3-5 degrees below normal and then the period finished with temps around 3-7 degrees above normal.

Sioux City IA: The period began with temps around 2 degrees above followed by a cool down with temps around 2-7 degrees below normal.

Casper WY: The region saw temps around 5-7 degrees above to begin the period and then finished with temps around 2-3 degrees below normal.

San Diego CA: The region started with temps around 1-2 degrees below normal and then finished around 1-2 degrees above normal.

Major Weather Impacts Discussion for September 17, 2013:

Day 1-3: High pressure over the Northeast will bring a nice day with cool weather to the region. Return flow will bring showers and thunderstorms to portions of the Plains. The Southwest will also see moderate amounts of rainfall associated with the monsoon. The majority of the Western US will remain dry. Day two high pressure will be over the Eastern US. A storm system will be moving through the Plains with showers and thunderstorms. A new tropical wave will emerge in the Southwest Gulf of Mexico. A powerful storm system will be moving into the Pacific Northwest. The period will end with the storm system moving through the Plains and over the Great Lakes.

Day 4-7: The period will start with high pressure moving off the East Coast. The storm system will move into the Great Lakes and extend into the Gulf Coast with showers and thunderstorms. High pressure will move into the Plains as well. Another storm system will begin to impact the Pacific Northwest. Day five low pressure will be over the East Coast bringing plenty of rainfall. Another tropical low will be moving over the Northern Gulf Coast bringing large amounts of rainfall to the region. High pressure will dominate the Northern Plains. The period will end with high pressure over Southeast Canada, while the tropical feature moves over the Mid-Atlantic region. A frontal boundary will be over the Pacific Northwest. Otherwise the rest of the West will remain stable and mild.

Day 8-12: The period will start with a very tranquil weather pattern over the US with high pressures over both coasts. Day nine high pressure will be over the East Coast, while a new storm system pushes over the West Coast bringing showers and possibly higher elevation snows. Day ten the storm system will move out of the Rockies and into the Northern Plains bringing showers and thunderstorms to the region. The period will finish with low pressure moving over the Great Lakes with showers and another tropical wave will move into the Gulf of Mexico near Florida. High pressure will dominate the weather from the Plains to the Southwest, while another storm system approaches the Pacific Northwest.

Long Range Outlook: The period will start with a tropical wave near Florida bringing heavy rainfall to the region. High pressure will dominate the Northern Plains. The period will end with high pressure along both coasts and another strong storm system moving through the Northern Plains bringing moderate rainfall and thunderstorms to the region.

Today’s Spotlight Forecast is for Minneapolis MN:

Tuesday: Partly cloudy with afternoon thunderstorms. High temps around 67F and lows near 60F. Winds from the southeast 9-14mph. Total rainfall near 0.05 inches.

Wednesday: Partly cloudy with afternoon thunderstorms. High temps around 79F and lows near 65F. Winds from the south 9-14mph . Total rainfall will be near 0.05 inches.

Thursday: Partly cloudy with a high near 80F and lows near 49F. Winds from the northwest 9-14mph.

Friday: Partly cloudy with a high near 70F and lows near 40F. Winds from the northwest 9-14mph. Patchy frost may be possible.

Saturday: Partly cloudy and cool with a high near 70F and lows near 44F. Winds from the southeast 9-14mph.

Ask The Weatherman for September 17, 2013:

Question: What does the term “Watch” mean?

Answer: When we use the term “watch” in weather, we are talking about the potential for something to occur – such as severe thunderstorm watches, tornado watches, winter storm watches, and hurricane watches. That means these types of conditions will be possible within the next 24 hours.

*** To have your question of the day answered or have your city spotlighted for the day make sure to visit redOrbit on Facebook. ***

Green Energy Weather Report for September 17, 2013:

Wave Energy: There will be moderate amounts of wave energy along the entire East Coast from the Northeast to the Southeast. The Gulf of Mexico will have slight to moderate amounts over the northern portion becoming moderate to extreme over the Southern Gulf. The Southwest and Northwest US will have moderate amounts of energy.

Solar Energy: There will be ample amounts of solar energy over the East Coast, the Gulf Coast and over most of the West.

Wind Energy: There will be moderate amounts of wind energy over the Northern Rockies and also over portions of Southern Texas today.

Hydro-Energy: There will be moderate amounts of wind energy over the Plains and the Southwest US.

September 17 Weather and Your Wallet (Seattle WA):

Partly cloudy skies and cooler temps will dominate the region today.

Dining: This afternoon will be a nice time to enjoy lunch at the park or the Space Needle.

Transportation: There will be no weather issues on the major roadways or at the airport.

Shopping: The region will have a nice day to get out and enjoy some fall shopping.

Electricity: There will be a small window in the morning when the region will need some heating degree days as the forecast is for 7HDD’s.

Yard Work: Today’s forecast is for 8GDD’s allowing some growth of plants during the afternoon hours. Also a nice day to do any yard work you may have.

Construction: There will be no weather related issues for outdoor projects today.

Outdoor Venues: Today will be a nice day to take a walk in the park or visit the Space Needle.


Source: redOrbit Meteorologist Joshua Kelly

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