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Big Story Weather – August 21, 2013

August 21, 2013

redOrbit Meteorologist Joshua Kelly

Big Story Weather from August 20:

Yesterday the heat started to build back over the Northern Plains with places rising back into the 90’s and heat index values over 100. Severe weather was limited. The largest hail was in South Dakota at around 1.25 inches and the strongest winds came from Nevada and South Dakota with gusts around 60-65mph.

Big Story Weather Discussion for August 21:

Surface Map: High pressure off the Mid-Atlantic will bring nice weather to Maryland and the Carolinas. A frontal boundary moving through the Great Lakes will bring showers and thunderstorms to the region and this will extend into the Northeast overnight. A new low pressure developing over Oklahoma will bring showers and thunderstorms to the region. Low pressure over the Baja will bring a few afternoon showers and thunderstorms to portions of the Southwest including Arizona and New Mexico. High pressure over the Rockies will bring another warm and dry day to the region and will extend into the West Coast.

Severe Weather: The three focus spots are the same again today, with the chance of seeing heavy rainfall and damaging winds over the Gulf Coast, the same for the Southwest, while the Plains and the Great Lakes will see damaging winds, large hail and heavy rainfall.

Tropical Weather: No activity in the Atlantic this morning.

Select City Forecast:

Boston MA: Partly cloudy with evening thunderstorms. High temps around 64F and lows near 60F. Total rainfall around 0.30 inches.

Mobile AL: Partly cloudy with afternoon thunderstorms. High temps around 92F and lows near 75F. Total rainfall will be near 0.45 inches.

Sioux City IA: Partly cloudy with a few thunderstorms. High temps around 77F and lows near 64F. Total rainfall will be around 0.25 inches.

Billings MT: Partly cloudy with a high near 83F and lows near 66F.

Seattle WA: Partly cloudy with a high near 82F and lows around 60F.

August 21, 2013 Storm Tracker Update:

Eastern Pacific Ocean: Tropical Depression 3C, continues to track south of Hawaii and will remain over open waters and continue to weaken. It currently has winds around 20kts and pressure of 1008mb. Another strong wave has emerged from the coast of Mexico. This feature will need to be watched for tropical development over the next 24 hours. Low pressure moving into Western Canada will bring showers to the region. A new low pressure area over Oklahoma will bring showers and thunderstorms to the region.

Atlantic Ocean: Low pressure moving through the Hudson Bay will bring showers to portions of Southeast Canada. Low pressure near Greenland will bring more showers to the region. Low pressure moving off the coast of Africa will have to be watched for possible tropical development.

Western Pacific: Typhoon Trami continues to impact and head towards Taiwan with winds around 65kts and pressure near 974mb. This storm will bring heavy rainfall, flooding, damaging winds and storm surge to Northern Taiwan. Last night Tropical Storm Pewa began pushing over the dateline. It will now become a Western Pacific storm with winds around 35kts and pressure of 996mb and will need to be watched for rapid development. Low pressure moving away from Japan will bring another day of showers and thunderstorms to Eastern Japan.

Indian Ocean: The southwest monsoon will be very active from India into Sri Lanka.

Southern Hemisphere: Low pressure moving away from South America will bring another day of showers to Northern Argentina and also rain and snow to Southern Argentina and Southern Chile. Low pressure to the south of Africa will make for another breezy day near Cape Town. Low pressure moving towards Southeast Australia will bring showers and gusty winds to Sydney and Southern New Zealand.

Five-Day Storm Index Outlook for August 21-25:

Boston MA: There will be slight to moderate impacts this evening as thunderstorms move through the region. On Aug 23-24 another cold front will push through the area.

Mobile AL: The region will have slight to moderate impacts over the next five days as afternoon thunderstorms move through the region.

Sioux City IA: The area will have slight to moderate impacts today associated with thunderstorms. On Aug 25 another round of thunderstorms will move through the region.

Billings MT: The area will start impact free. By Aug 23-25 a frontal boundary will push through bringing thunderstorms to the area along with a slight to moderate impact.

Seattle WA: The next five days the region will be impact free.

Climate Watch for August 16-20:

Boston MA: The area started out with temps around 1-6 degrees below normal and then warmed to around 5-8 degrees above normal to finish the period.

Mobile AL: The past five days temps have been running around 2-15 degrees below normal.

Sioux City IA: The period started with temps around 2-9 degrees below normal and then finished with temps around 4-6 degrees above normal.

Billings MT: The past five days temps have been around 6-14 degrees above normal.

Seattle WA: The past five days the region has been warm with temps around 2-7 degrees above normal.

Major Weather Impacts Discussion for August 21, 2013:

Day 1-3: High pressure over the Southeast and Mid-Atlantic will bring nice weather to the region. An approaching frontal boundary will bring evening showers and thunderstorms to the Northeast. The frontal boundary will bring afternoon showers and thunderstorms from the Southern Plains to the Great Lakes. An easterly wave moving through the Gulf Coast will bring showers and thunderstorms to the region. The Southwest will have afternoon thunderstorms. The Rockies and the West Coast will remain warm and dry keeping the fire threat high. Day two the frontal boundary will bring showers and thunderstorms to the Northeast, the Mid-Atlantic and back into the Southeast. The sea breeze will bring another day of showers and thunderstorms to the Gulf Coast. High pressure over the Great Lakes will bring nice weather to the region. A tropical feature developing off the coast of Mexico will slowly advance towards the Baja. The period will finish with a boundary extending from the Mid-Atlantic back to the Southwest. Expect to see showers and thunderstorms along this boundary. The tropical feature will move into the Southern Baja and high pressure will continue over the Eastern Lakes and the Northeast.

Day 4-7: The period will start with high pressure over the Northeast. A frontal boundary will bring showers to the Southeast and Gulf Coast. Another storm system will move into the Northern Plains bringing showers and thunderstorms to the region. A strong low will bring showers and higher elevation snows to Alaska. The tropical feature will push into the central part of the Baja bringing heavy rainfall to the region. Day five high pressure will dominate the weather over the Eastern US. The tropical feature will push into the Baja and start to spread moisture into Southern California and Southwestern Arizona. The period will finish with a strong low pressure area moving into Alaska bringing another round of showers and higher elevation snows.

Day 8-12: The period will start with low pressure moving through the Northeast and a second low pressure area moving through the Northern Plains. Both regions will see showers and thunderstorms. Day nine a storm system will continue to push into the Great Lakes, while a strong high pressure area moves into the Northern Plains. Day eleven a very strong storm system will push into the Northeast bringing strong winds, heavy rainfall and possibly some severe weather. A very cold area of high pressure will slide into the Plains and the Great Lakes. The frontal boundary along the Mid-Atlantic to the Gulf Coast will provide the region with heavy rainfall. The period will end with a possible tropical feature pushing off of Florida and towards the Northern Gulf.

Long Range Outlook: The period will see more rain and thunderstorms from the Gulf Coast to the Southeast, while another very strong and cold high pressure area slides into the Northern Plains. The period will finish with a frontal boundary along the East Coast and a very strong cold air mass pushing into the Northern Plains.

Today’s Spotlight Forecast is for Chicago IL:

Wednesday: Partly cloudy with afternoon thunderstorms. High temps around 85F. Winds from the southwest 7-12mph. Lows near 67F. Total rainfall around 0.20 inches.

Thursday: Partly cloudy with thunderstorms early. High temps around 78F. Winds from the northeast 9-14mph. Lows near 59F. Total rainfall near 0.20 inches.

Friday: Partly cloudy and mild with a high near 72F. Winds from the northeast 5-10mph. Lows near 54F.

Saturday: Partly cloudy and mild with a high near 77F. Winds from the southeast 7-12mph. Lows near 59F.

Sunday: Partly cloudy and warmer with a high near 83F. Winds from the southwest 9-14mph. Lows near 67F.

Ask The Weatherman for August 21, 2013:

Question: What do the terms IC, CG, CC, CA mean?

Answer: Today we look at more weather terms and these terms pertain to lightning. The first is called In Cloud (IC) when the lighting occurs inside a cloud. Cloud to Ground (CG) is the huge bolts that you see hitting things on the ground. Cloud to Cloud (CC) happens when the bolt passes from one cloud into another. Cloud to Air (CA) is when the bolt of lightning leaves the cloud but passes into clear air. All of these types of lighting make for great photos, but be careful as lightning can and will kill.

*** 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 August 21, 2013:

Wave Energy: There will be light to moderate amounts of energy along the Northeast coast. The Southeast and Mid-Atlantic will have light amounts of energy. The Northern Gulf will have light to moderate amounts of energy today. The Southwest will have moderate amounts of energy. The Northwest will have light to moderate amounts of energy as well.

Solar Energy: There will be ample amounts of solar energy along the Mid-Atlantic to the Southeast. The Northeast will have lighter amounts during the morning hours ahead of the cold front. Look for moderate amounts of energy during the day over the Gulf Coast ahead of the daytime sea breeze. There will be ample amounts of sunlight over the Southwest and also the West along with the Rockies.

Wind Energy: The best wind energy today will come from the Southeast and also over portions of the Northern Rockies.

Hydro-Energy: There will be small amounts of energy over the Northeast this evening. The Gulf Coast will have small amounts this afternoon. The Southern Plains into the Great Lakes will have small to moderate amounts of energy. The Southwest will have small amounts of energy this afternoon as well.

August 21 Weather and Your Wallet (Austin TX):

Sunny and hot day in store for Austin as temps will soar into the upper 90’s.

Dining: This morning and later this evening will be the best time to enjoy an outdoor meal.

Transportation: There will be no weather delays on the roads or in the air today.

Shopping: If you plan on heading out to do some shopping, take it easy because it will be very warm.

Electricity: There will be a fairly moderate demand for cooling today as high temps head towards 96F. This will bring the CDD’s to around 22 with the highest demand between 12PM-6PM.

Yard Work: Today will be a good day to just sit in the back yard and let the yard work wait as its going to be hot.

Construction: There will be no weather delays to the outdoor projects, however make sure to stay hydrated as it will be hot.

Outdoor Venues: Today will be a good day for taking the dog for a walk before lunch or after around 7pm as it starts to cool back down.


Source: redOrbit Meteorologist Joshua Kelly

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