US Day 3-7 Hazards Outlook
NWS Weather Prediction Center College Park MD
423 PM EDT Mon Jun 01 2020
 
Valid Thursday June 04 2020 - Monday June 08 2020
 
Hazards:
- Heavy rain across much of the Gulf Coast region from eastern Texas to all of Florida including 
portions of the Southeast, Fri-Mon, Jun 5-Jun 8.
- Severe weather across portions of the northern Plains, Thu, Jun 4.
- Flooding occurring or imminent across portions of the lower Mississippi Valley, the northern 
Plains, the northern Rockies, the Midwest, and the Carolinas.
- Flooding likely across portions of the Southeast and the Midwest.
- Much above normal temperatures across portions of the Intermountain West, central Great Basin, 
into the northern and central Rockies, and the northern and central High Plains, Thu-Fri, Jun 4-Jun 
5.
- Much above normal temperatures over the central High Plains, Sat-Mon, Jun 6-Jun 8.
- Much above normal temperatures across portions of northwestern Alaska, Thu, Jun 4.
 
Detailed Summary:

The medium-range period (Thu Jun 4 - Mon Jun 8) will begin with much above normal temperatures over 
the interior western U.S. extending eastward into the northern and central High Plains under an 
upper ridge of high pressure.  High temperatures over the central High Plains are forecast to reach 
the century mark Thursday and Friday.  By the weekend, the much above normal temperatures should be 
confined to the northern and central High Plains as a large cool air mass works its way through the 
northwestern U.S. behind a cold front.  Cool rain will tend to be focused along the Cascades 
together with the possibility of wet snow across the higher elevations of the Pacific Northwest and 
into the Intermountain region.  Meanwhile, summer-like heat and humidity is expected to overspread 
much of the eastern U.S. Thursday through Saturday.  By Sunday, a cold front is expected to bring 
down cooler and drier air from eastern Canada, ending the heat across much of the East Coast for 
early next week.

Perhaps the area that warrants growing concerns during the medium-range period is in the Gulf of 
Mexico, where the National Hurricane Center has been monitoring the potential for tropical 
cyclogenesis.  Models have been indicating that a large area of disturbed weather associated with 
the remnants of tropical storm Amanda over Central America will gradually move northward toward the 
Gulf of Mexico.  Although the exact track of this system is highly uncertain at this point, its 
relative large size means that many areas along the Gulf Coast will see an increasing threat of 
heavy rain toward the end of this week.  This includes areas from eastern Texas through the central 
Gulf states to all of Florida including portions of the Southeast.  The heavy rain may extend 
further inland west of the lower Mississippi Valley depending on the track and forward motion of 
the potential tropical system.

Elsewhere in the U.S., precipitation will generally be below heavy rain criteria through the 
medium-range period.  However, bouts of showers and thunderstorms can be expected across the 
northern tier states due to occasional frontal passages.  Some of the thunderstorms could be severe 
over portions of the northern Plains on Thursday.

Over Alaska, relatively quiet weather is in store through the medium-range period.  Much warmer 
than normal temperatures across the northwestern part of the state will gradually moderate.  
However, ice jam flooding remains a concern over the North Slope as rivers have not yet broken up, 
while minor snowmelt flooding is a possibility in central and southern parts of the mainland.  
Farther south, some terrain-influenced/enhanced precipitation is expected to linger across southern 
Alaska, where wet snow is possible for the higher elevations.  Precipitation amounts are not 
expected to be heavy.

Kong