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National Situation Update: Saturday, June 27, 2009

Homeland Security Threat Level: YELLOW (ELEVATED).

Significant Weather

Excessive Heat Warnings
Excessive Heat Warnings are forecast to continue through the weekend for the States of Oklahoma, Kansas, Missouri, Illinois, and Arkansas, with temperatures ranging 105 - 110 degrees.
An Excessive Heat warning will also be in effect for the San Francisco Bay Area from Saturday morning through late Sunday, with temperatures ranging from the mid 90s to 108 degrees.  An Excessive Heat Warning means that a prolonged period of dangerously hot temperatures will occur.
Affected states have opened cooling center as needed.

Midwest
A cold front will affect the western Great Lakes, mid-Mississippi Valley and the south-central Plains this weekend.  Severe thunderstorms are possible across Wisconsin, Iowa, Illinois, Missouri and Kansas.  Temperatures will reach the mid to upper 90s for Kansas into the lower Ohio Valley.  Flash Flood Warnings are in effect for northeast North Dakota until early Saturday morning.
Northeast
A cold front will move in on Sunday affecting the western counties of the Northeast, resulting in showers and thunderstorms from western New York to West Virginia and western Virginia.  The highs Saturday will range from near 70 in Maine to the 80s in the Mid-Atlantic.
South
Thunderstorms will be the main concern for most of the southeastern coast of Florida and the northern Gulf Coast.  The highs will peak in the 90s in the Southeast but near or over 100 from the lower Mississippi River westward.  By Sunday, the Midwest cold front will move southward into the Tennessee Valley, Arkansas and the Oklahoma-Texas Red River Valley.  Some thunderstorms will accompany the cold front and could become severe in the Tennessee Valley, southern Appalachians and Savannah River Valley.
West
The Far West, especially away from the coast, will experience increasing heat this weekend with near record highs of 105 degrees or better in the Central Valley of California and the mid 80s in the Willamette and Columbia Valleys.

Fire Management Assistance Grant (FMAG)

No activity. (FEMA HQ)

Tropical Weather Outlook

Atlantic:
A tropical wave over the northwestern Caribbean Sea continues to produce a disorganized area of showers and thunderstorms from the coast of Honduras northward to western Cuba.  There are no signs of a surface circulation at this time and significant development of this system is not expected before it reaches the Yucatan Peninsula early on Saturday.  There is a 30 to 50 percent chance of this system becoming a tropical cyclone during the next 48 hours.
Eastern Pacific:
Tropical cyclone formation is not expected during the next 48 hours.
Western Pacific: 
No activity. (NOAA, HPC, National Hurricane Center, Central Pacific Hurricane Center and the Joint Typhoon Warning Center)

Earthquake Activity

No new activity (FEMA HQ)

Preliminary Damage Assessments

No new activity (FEMA HQ)

Wildfire Update

National Preparedness Level:  1
National Fire Activity as of Friday, June 26, 2009:

• Initial attack activity:  Light (121 new fires)
  
• New large fires:  4
  
• Large fires contained:  3
  
• Uncontained large fires:  3
  
• States affected:  AK, CA, TX and AL

Predictive Services Discussion:
Scattered showers and a few thundershowers are expected for the Alaska interior today.  California will be generally warmer and drier while scattered thundershowers are expected over the Southwest and Great Basin.  (National Interagency Fire Center, National Incident Information Center, NOAA/NWS Storm Prediction Center)

Disaster Declaration Activity

Amendment #1 was approved for FEMA-1847-DR-MO, adding Grundy and Livingston Counties for Public Assistance. (FEMA HQ)