Big Story Weather – September 5, 2013
redOrbit Meteorologist Joshua Kelly
Big Story Weather from September 4:
The heat continued to dominate a good portion of the Plains region. Cooler air began to slide in with the high pressure over the Great Lakes, the Eastern Plains, and the Northeast. Severe weather was limited to 2.0 inch hail over South Dakota along with 60-70mph wind gusts in Southern California.
Big Story Weather Discussion for September 5:
Surface Map: High pressure moving into the Great Lakes and the Ohio River Valley will bring cooler weather with partly cloudy skies. High pressure over the Rockies will keep the region dry and warm. A storm system will move through the Pacific Northwest bringing heavy rainfall to the region. The Southwest monsoon will bring showers to Arizona and New Mexico. On shore flow will bring afternoon sea-breeze to the Gulf Coast and the Southeast. Tropical Storm Gabrielle will bring tropical storm force conditions to Puerto Rico.
Severe Weather: There will be two places of concern today. The first will be over the Southwest US where there will mostly be heavy rainfall along with damaging winds. The second location along the Gulf Coast will mostly see heavy rainfall along with damaging winds. Flash flooding will be possible over the Pacific Northwest as heavy rainfall continues to move into the region.
Winter Weather: Looking on the severe weather graphic, two spots have been highlighted in light blue. These places represent the locations that will have the chance to see a light frost or freeze as low temps fall into the lower 30’s under clear skies this evening.
Tropical Weather: Tropical Storm Gabrielle has formed overnight and is now impacting Puerto Rico with tropical storm conditions. Winds are around 35kts and pressure is near 1008mb. The storm will move slowly to the North-Northwest over the next couple of days. A second area is being watched over the Yucatan Peninsula and has a slight chance of tropical development.
Select City Forecast:
Boston MA: Partly cloudy with a few evening showers possible. High temps around 79F and lows near 60F. Total rainfall around 0.25 inches.
Tampa Bay FL: Partly cloudy with afternoon thunderstorms. High temps around 84F and lows near 77F. Total rainfall will be near 0.25 inches.
Chicago IL: Partly cloudy and cool with a high near 67F and lows near 60F.
Denver CO: Partly cloudy with a high near 72F and lows near 60F.
Las Vegas NV: Partly cloudy with a high near 94F and lows near 88F.
September 5, 2013 Storm Tracker Update:
Eastern Pacific Ocean: Tropical Depression 12E has developed off the coast of Mexico with winds around 30kts and pressure near 1006mb. The storm will continue to move northward towards the Baja. Low pressure over Alaska will bring showers to the region.
Atlantic Ocean: Tropical Storm Gabrielle has formed near Puerto Rico with winds around 35kts and pressure of 1008mb. The storm will move just west of Puerto Rico bringing heavy rainfall to the region along with storm surge and gusty winds. Low pressure near the Yucatan Peninsula is also being watched for possible tropical development. Low pressure moving towards Greenland will bring showers to the region. Low pressure moving over Northern Europe will bring shower to the region. Another tropical wave along the west coast of Africa will have to be watched for possible tropical development.
Western Pacific: Low pressure along the east coast of Japan will bring showers to the region. Low pressure moving across eastern China will bring showers and thunderstorms the region.
Indian Ocean: The southwest monsoon will be active again today over southwest India and into Sri Lanka.
Southern Hemisphere: Low pressure moving over southern Chile and Argentina will bring showers and thunderstorms to Brazil. Southern Argentina will also see a few snow showers. Low pressure moving south of South Africa will bring gusty winds to the region. Low pressure moving through Australia will bring showers to the region.
Five-Day Storm Index Outlook for September 5-9:
Boston MA: There will be slight impacts this evening as showers move through the region. On September 8 the region will see another round of thunderstorms with slight to moderate impacts possible.
Tampa Bay FL: The region will have slight to moderate impacts over the next five days associated with afternoon thunderstorms.
Chicago IL: There will see impacts on September 6-7 associated with thunderstorms. Another round of thunderstorms on September 9 will bring moderate impacts to the region.
Denver CO: The period will begin impact free followed by moderate impacts to finish the period from September 8-9.
Las Vegas NV: The next five days will be impact free for the area.
Climate Watch for August 31- September 4:
Boston MA: The area has seen temps around 1-6 degrees above normal for the past five days.
Tampa Bay FL: The region started with temps around 1-2 degrees below normal and then finished the period around 1-2 degrees above normal.
Chicago IL: The period will start with temps around 5-6 degrees above normal followed by a period of temps around 1-2 degrees below normal and then finished the period with a warm up as temps rose back to around 5 degrees above normal.
Denver CO: The period started with temps around 4-5 degrees below normal and then warmed to around 8-11 degrees above normal.
Las Vegas NV: The period started with temps around 1-4 degrees below normal and then finished with temps around 2-4 degrees above normal.
Major Weather Impacts Discussion for September 5, 2013:
Day 1-3: High pressure over the Northern Plains and Great Lakes will bring partly cloudy skies and very cool weather overnight with low temps in the 30’s for some. The onshore flow will bring an afternoon sea-breeze to the Gulf Coast and the Southeast allowing for thunderstorms to develop. High pressure over the Rockies will keep the region dry and warm. An area of low pressure will move through the Pacific Northwest bringing moderate rainfall to the region along with an increased chance of flooding. The southwest monsoon will bring a few afternoon showers to the region. Day two high pressure will slide into the Northeast, while a few afternoon thunderstorms will be possible over the Gulf Coast and Southeast along the sea-breeze fronts. Tropical storm conditions will continue for Puerto Rico. A strong low pressure area will continue to bring heavy rainfall to the Pacific Northwest which will be great help for all the dry conditions and reduce fire dangers in the region. The period will finish with low pressure moving into the Northern Plains bringing showers and thunderstorms to the region.
Day 4-7: The period will start with low pressure over the Northern Plains bringing showers to the region. High pressure will move into the Great Lakes. There will be moderate rains over Montana as well. The tropical storm will continue to move towards Bermuda. During the middle of the period the strong low pressure area will move into the Plains bringing some strong thunderstorms to the area. The period will end with high pressure along the East Coast, while showers and thunderstorms will be over the Gulf Coast. The strong low pressure will move into Canada and the cold front will extend into the Plains bringing another day of showers and thunderstorms to the region. The southwest monsoon will bring moderate rainfall to the Southwest. A strong low pressure will be moving into Alaska bringing showers and some higher elevation snows.
Day 8-12: The period will start with high pressure along the East Coast. Tropical moisture will be on the increase over the Gulf Coast. Another frontal boundary will move through the Northern Plains. By day nine a strong storm system will extend along the entire East Coast back into the Gulf Coast bringing showers and thunderstorms to the entire region. High pressure will slide into the Northern Plains. The period will end with a very strong high pressure area along the East Coast. Moderate rainfall will extend along the Gulf Coast and interact with a tropical surge as well. There will be another low moving into the Northern Rockies. Expect to see a very tight gradient over the Northern Plains which will lead to strong winds.
Long Range Outlook: The period will start with the strong high pressure area over the East Coast and the low pressure moving out of the Rockies into Canada. The winds will be strong again over the Northern Plains. Moderate return flow rain will be over the Southeast and Gulf Coast. The middle of the period will have the high pressure over the East Coast allowing for more return flow to setup over the Gulf Coast and Southeast. The low pressure over the Northern Rockies and Canada will extend a cold front through the Plains and will be the focus of showers and thunderstorms – some severe weather will be possible. The period will end with the high pressure still holding over the East Coast creating another day of return flow along the Gulf Coast and Southeast. A tropical feature will begin to push into the Baja bringing heavy rainfall to Southern Arizona and New Mexico along with Southern California.
Today’s Spotlight Forecast is for Detroit MI:
Thursday: Partly cloudy and cool with a high near 70F. Winds from the Northeast 5-10mph. Overnight lows near 45F.
Friday: Partly cloudy and cool with a high near 72F. Winds from the southwest 5-10mph. Overnight lows near 54F.
Saturday: Partly cloudy with a few afternoon thunderstorms. High temps around 83F. Winds from the northwest 7-12mph. Overnight lows near 60F. Total rainfall will be 0.10 inches.
Sunday: Partly cloudy and cool with a high near 70F and lows near 52F. Winds will be from the northeast 10-15mph.
Monday: Partly cloudy and cool with a high near 74F. Winds from the southeast 5-10mph. Overnight lows near 60F.
Ask The Weatherman for September 5, 2013:
Question: Who defined the tornado scale?
Answer: The tornado scale was created after a tornado in North Dakota. At that time Dr. Fujita had the chance to go out and survey the damage and this lead to the creation of the Fujita Scale. In recent years a few changes have gone into the scale so the new scale is now known as the Enhanced-Fujita Scale.
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Green Energy Weather Report for September 5, 2013:
Wave Energy: There will be light to moderate wave energy over the Northeast and also the Mid-Atlantic. The Southeast will see increasing wave energy. The Northern Gulf of Mexico will have light amounts of energy. The Southwest will have moderate amounts of energy along with the Northwest.
Solar Energy: There will be ample amounts of energy over the Northeast, the Gulf Coast and Southeast before the sea breeze sets up. The Plains and the Great Lakes will have moderate amounts of energy as high pressure slides into the area. The Rockies will have ample amounts of solar energy as high pressure dominates the weather.
Wind Energy: The best wind energy today will be over the Northern Plains and also over the Pacific Northwest behind the frontal boundary.
Hydro-Energy: There will be moderate to extreme amounts of energy over the Pacific Northwest. The Southwest will see light amounts of energy. There will also be light amounts of energy for the Gulf Coast and the Southeast.
September 5 Weather and Your Wallet (Kansas City MO):
High pressure moving into the region will bring partly cloudy skies to the area.
Dining: It will be a nice day to enjoy lunch at the park, but this afternoon it will be a bit too warm.
Transportation: There will be no weather impacts on the roadways or the airport today.
Shopping; There should be no issues with getting out and enjoying some shopping today.
Electricity: There will be a small demand this afternoon of cooling as high temps rise to near 90F. This will bring about 10CDD’s for the area.
Yard Work: This morning will be a good time to get out and get the yard work done.
Construction: There should be no issues with outdoor projects today. This afternoon make sure to stay hydrated as it will be warm.
Outdoor Venues: A nice day to host an outdoor event in the region.