Monday, March 30, 2020

April 2014 Tornadoes

April 2014 Tornadoes
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Created:
Monday, 28 April 2014
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This group is designed to discuss the prayer-care-share response to the tornadoes that happened April 27-30, 2014. 

Wednesday, 07 May 2014 by Misti McHatton

Significant National Weather:

Today:

Rain and thunderstorms expected across the Plains and into the Mid-Atlantic as well as the Pacific Northwest, Great Basin and Central Rockies.

Severe thunderstorms possible from the Southern Plains to the Upper Mississippi Valley and Great Lakes.

Snow is expected from the Northern Intermountain to the High Plains and into the Central Rockies. 3-6 inches of snow at lower elevations with up to 18 inches possible above 7,000 feet.

Elevated and/or Critical Fire Weather is forecast across portions of the Desert Southwest and Central/Southern Plains, while an area of Extremely Critical Fire Weather is expected from the Texas Panhandle into southern Kansas.

A large area of Red Flag Warnings will continue through the day from the Southwest to the Central Plains due to low humidity and very strong winds.

Tomorrow:

A large swath of severe thunderstorms continues from the Southern Plains to the Upper Mississippi Valley.

A rain/snow mix is forecast to continue throughout the Northern Rockies into the Great Basin.

Rain is expected in the Northwest, across the Plains and into the Northeast.

Elevated Fire Weather will continue through the eastern portion of the Southern Plains.

Space Weather: Radio blackouts reaching the R1 level occurred during the past 24 hours; no Space Weather storms are expected during the next 24 hours. (NOAA SWPC)

Drylines: A Source of Lift for Thunderstorm Formation

A dry line is expected to set up across the southern Plains by this afternoon, May 7, 2014.

All thunderstorms require three ingredients for formation – moisture, instability, and a lifting mechanism.

Some of the sun’s heating of the earth’s surface is transferred to the air, which creates different densities. The tendency for that air to rise increases with decreasing density. The difference in air density is the main source for lift and is accomplished by several mechanisms, or methods.

Drylines are one of several lifting methods that accomplish lift, or upward motion. They are boundaries between two air masses of different moisture content and separates warm, moist air from hot, dry air. Moist air is less dense than dry air. Drylines act similar to fronts in that a boundary exists between the two air masses of different densities.

The air temperature behind a dryline is often much higher due to the lack of moisture. That alone will make the air less dense but the moist air ahead of the dryline has an even lower density making it more buoyant. The end result is air lifted along the dryline forming thunderstorms. This is common over the plains in the spring and early summer.

Tropical Activity:

Atlantic: None; updated from June 1 through November 30.

Special outlooks may be issued as conditions warrant.

Eastern Pacific: Area 1 (Invest 90E):

A large area of disturbed weather located several hundred miles

South of Manzanillo Mexico is associated with an elongated area of low pressure. This system is expected to move generally northward and then northeastward toward the coast of Mexico over the next couple of days. Environmental conditions appear to be favorable for some development during the next day or so. This system has a MEDIUM chance (50%) of becoming a tropical cyclone during the next 5 days.

Central Pacific: None

Western Pacific: None

U.S. Hazards Outlook: (See NWS CPC Monday-Friday for the latest

information.)

 May 9-10: Heavy rain – Central Gulf Coast to Ohio Valley

 May 8-9: Heavy rain – Central Plains & Midwest

 Areas of flooding for parts of the Central Rockies, Central

Plains, Midwest & Southern CONUS as depicted on map

 Flooding possible due to river ice jams for parts of central

and southwestern Alaska as depicted on the map

 Severe drought for parts of Iowa, the Great Plains,

 

Southwest, Pacific Northwest, Great Basin, California, and Hawaii

 

Wednesday, 07 May 2014 by Misti McHatton
Wednesday, 07 May 2014 by Misti McHatton
Wednesday, 07 May 2014 by Misti McHatton
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