US Day 3-7 Hazards Outlook
NWS Weather Prediction Center College Park MD
413 PM EDT Mon May 31 2021
 
Valid Thursday June 3 2021 - Monday June 7 2021
 
Hazards:
- Heavy rain across portions of the Southern Plains, Fri-Sat, Jun 4-Jun 5.
- Heavy rain across portions of the Lower Mississippi Valley and the Southern Plains, Sun-Mon, Jun 
6-Jun 7.
- Heavy rain across portions of the Southeast, the Mid-Atlantic, and the Southern Appalachians, 
Thu-Fri, Jun 3-Jun 4.
- Flooding possible across portions of the Central Plains and the Southern Plains.
- Flooding occurring or imminent across portions of the Southern Plains.
- Flooding likely across portions of the Lower Mississippi Valley, the Southern Plains, the 
Northern Rockies, and the Northern Great Basin.
- Much above normal temperatures across portions of the Central Plains, the Central Great Basin, 
the Northern Plains, the Northern Rockies, the Central Rockies, California, the Northern Great 
Basin, the Upper Mississippi Valley, and the Pacific Northwest, Thu-Fri, Jun 3-Jun 4.
- Much above normal temperatures across portions of the Central Plains, the Central Great Basin, 
the Northern Plains, the Central Rockies, the Upper Mississippi Valley, and the Great Lakes, 
Sat-Sun, Jun 5-Jun 6.
- Much above normal temperatures across portions of the Northeast, Sat-Mon, Jun 5-Jun 7.
 
Detailed Summary:

A rather active weather pattern is expected to be in place across the southern tier of the U.S. for 
the end of the week and heading into the weekend.  The first area of concern will be across 
portions of the southeastern U.S. for Thursday and Friday, with this region being in the warm 
sector of an advancing front and ahead of an upper level shortwave.  Patchy areas of 1-3 rainfall 
totals can be expected from the southern Appalachians to the Outer Banks over that 48 hour time 
period, and perhaps locally higher where convective training develops.

The main area of concern with heavy rainfall is Texas and Louisiana for the upcoming weekend and 
extending into next Monday.  Moist return flow off the Gulf of Mexico around the Bermuda high, 
combined with a developing cut-off low, will likely fuel multiple rounds of heavy rainfall over a 
several day period, perhaps on the order of 3 to 6 inches with locally higher amounts.  With the 
saturated grounds from recent above average rainfall, the potential for flooding exists.

In terms of temperatures, it will be feeling more like the middle of summer across much of the 
northern tier with highs running a good 10 to 20 degrees above early June average for many areas.  
The greatest positive anomalies are likely to exist across northern portions of the Intermountain 
West and the northern Rockies on Thursday and Friday, with highs 15 to 25 degrees above normal.  
This will all be in response to the jet stream lifting northward into Canada as a strong upper 
level ridge builds in.  

Hamrick