National Weather Service Raw Text Product

Displaying AFOS PIL: PNSRIW Received: 2022-06-22 21:24 UTC


441 
NOUS45 KRIW 222124
PNSRIW
WYZ001>020-022>030-230924-

Public Information Statement
National Weather Service Riverton WY
324 PM MDT Wed Jun 22 2022

DROUGHT INFORMATION STATEMENT
National Weather Service Riverton WY
310 PM MDT WED JUNE 22 2022

...EXTREME DROUGHT CONDITIONS REMAIN ACROSS WESTERN WYOMING…

.SYNOPSIS:

.Drought Intensity and Extent:
Cooler conditions and one strong cold front brought moderating conditions to 
northern and central Wyoming over the past month, which improved conditions 
across that part of the state. Drier conditions across the south kept a 
deficit in precipitation totals for another month as drought  remained 
unchanged across western and southern Wyoming. According to the latest U.S. 
Drought Monitor map that was updated on June 16th, 93 percent of the state 
remained under drought conditions ranging from Abnormally Dry to Extreme 
Drought. 

During the last four weeks Extreme (D3) Drought conditions were removed 
from northern Teton and western Park Counties, while remaining across 
central Teton  and northeast  Sublette Counties, in addition to central 
and southeastern Lincoln and extreme western Sweetwater Counties. Severe 
(D2) Drought conditions were downgraded from all of northern Wyoming, while 
persisting across the rest of Teton, Sublette, Lincoln and northwestern and 
southern Sweetwater Counties.

Moderate (D1) Drought conditions were observed across western Fremont, 
central and eastern Sweetwater, and northern and eastern Johnson Counties. 
Abnormally Dry (D0) conditions were now seen across northern Teton, most 
of Park, Big Horn and Washakie Counties,as well as the eastern half of 
Fremont, southwest Johnson and most of Natrona Counties.

.Temperature and Precipitation:
During the past four weeks, Wyoming was cooler, with wet conditions 
observed across the northwest and south-central sections, and drier across 
the southwest and central areas of the state. This latest series of cold 
fronts did bring a few rounds of late season snow to the mountains, along 
with near freezing readings observed in the lower elevations. Overall, 
temperatures across the area averaged 1 to 2 degrees below normal. The 
coldest areas were located across northern Big Horn, central Park, southeast 
Sublette and northwest Natrona Counties where readings were 2 to 3 degrees 
colder than normal. The warmest part of the state was located across 
southwestern Lincoln County which had readings near average to 1 degree 
above normal.

The month of May ended with three days of widespread precipitation that 
also brought  several inches of new snow to the mountains. This system 
brought three day totals of 2 to 5 inches of liquid precipitation to a 
number of sites across northwest and northern Wyoming. On the dry side 
of the weather pattern,  these systems did not produce as much precipitation 
across southwest and central Wyoming. During the last four weeks the wettest 
areas were recorded across northern Teton, northwest and central Park and 
northeast Natrona Counties where over 200 percent of normal precipitation 
fell. The driest regions of Wyoming were observed across southern Sublette 
and northeast Lincoln Counties where less than 50 percent of normal 
precipitation was recorded.

.Hydrologic Conditions:
Above normal precipitation and a few days of above normal temperatures 
around June 10th-12th assisted in melting of the high level snowpack which 
rapidly raised river heights across northwestern Wyoming and produced areas 
of major flooding. The latest report from the U.S. Geological Survey 
WaterWatch web page indicated near normal flows across most of the region 
with above normal flows across the northwest and below average flows across 
the drier southwest.

Reservoirs across the region were increasing in water levels, particularly 
across the northern and central areas of the state where the most 
precipitation and high elevation snowpack melting were peaking. Reservoirs 
across northern and central Wyoming ranged from 96 percent full at Boysen 
to 46 percent at Jackson Lake, with sites across the south averaging 98 
percent full at Alcova to 52 percent at Seminoe. 

Snowpack Conditions:
Warmer than normal temperatures in the third week of May and the second 
week of June quickly melted out any remaining mid and low level snowpack 
and reduced the higher elevation (above 9400 feet) snow by half. Weekly 
update reports from the Natural Resources and Conservation Service ended 
on May 24th.


.SUMMARY OF IMPACTS:

.Agriculture Impacts...
A strong and slow moving cold front that drifted across Wyoming at the 
end of May and the start of June, brought cooler and very wet conditions 
to much of Wyoming which helped in improving short term soil moisture 
conditions. Additionally, the cooler weather, at the beginning of June 
with even some snow and ground frost hampered planting operations and crop 
growth.

The latest USDA Wyoming Monthly Crop Progress and Condition Report issued 
on June 19th indicated general improvements to soil moisture conditions 
over the last four weeks as 47 percent of topsoil moisture across the 
state were reported at the short to very short levels, compared to 71 
percent this time last year and the 5 year average of 38 percent. The 
subsoil moisture reports across Wyoming have also shown some recovery with 
49 percent being reported as very short to short on moisture across the 
region, compared to 70 percent a year ago and a 5 year average of 38 
percent.

Pasture and rangeland conditions have also indicated gradual improvements 
over the past month with areas rated at 16 percent very poor to poor, 
compared to 51 percent this time last year and a 5 year average of 18 
percent. Additionally, stock water supplies have shown overall improvements 
across the region and were reported as 11 percent very short to short this 
last month, compared to 13 percent last month.

.Fire Danger Impacts…
After a cool and wet period during the last few days of May, warmer and 
mostly drier conditions moved across much of southern and central Wyoming 
in June. This has started to reduce the average fuel and soil moisture 
conditions across the region, especially east of the Continental Divide. 
The latest National Interagency Fire Center (NIFC) Observed Fire Danger 
ratings indicated High Fire Danger across southeast Wyoming, Moderate 
Danger across the southern and central sections with Low Fire Danger 
across the west.

.DROUGHT MITIGATION ACTIONS:
None.

.LOCAL PRECIPITATION/TEMPERATURE OUTLOOK:

The latest Climate Prediction Center`s (CPC) outlook for Wyoming for the 
rest of June indicated a trend of warmer than normal temperatures with a 
slight chance of above normal precipitation. The CPC seasonal outlooks 
for the period of July through September indicated a trend towards above 
normal temperatures and below average precipitation for the summer across 
the state.

The latest U.S. Monthly Drought Outlook for the rest of June showed 
indications of continued drought conditions across southern Wyoming with 
some improvement across the north. Additionally, the U.S. Seasonal Drought 
Outlook for the period of July through September has drought conditions 
persisting across western, southern and eastern  Wyoming through the 
period.

.NEXT ISSUANCE DATE:

This product will be updated by mid-July 2022 or sooner if necessary, in 
response to any significant changes in conditions.

&&

.RELATED WEB SITES:

Additional information on current drought conditions may be found at
The following web addresses:

U.S. Drought Monitor: https://www.droughtmonitor.unl.edu
U.S. Drought Information System: https://drought.gov
NWS Riverton drought page: https://www.weather.gov/riw/drought
Wyoming Water Resource Data System (WRDS): http://www.wrds.uwyo.edu

To report effects of the drought in your area, please go to the Drought 
Impact Reporter at: http://droughtreporter.unl.edu/

.Acknowledgments:

The U.S. Drought Monitor is a multi-agency effort involving the National 
Weather Service and National Centers for Environmental Information, the 
U.S. Department of Agriculture (USDA), state and regional climatologists, 
and the National Drought Mitigation Center. Information for this statement 
was gathered from NWS and FAA observation sites, state cooperative 
extension services, the USDA and USGS.

.Questions or comments:

If you have any questions or comments about this drought information
Statement, please contact:

National Weather Service
12744 West US Highway 26
Riverton, WY 82501
Phone:  800-211-1448
Email:  nws.riverton@noaa.gov

$$