Sarah Teefey, nws.pa@noaa.gov
This year, El Nino is in place heading into winter for the first time in four years, driving the outlook for warmer-than-average temperatures for the northern tier of the continental United States, according to NOAA’s U.S. Winter Outlook released today by the Climate Prediction Center — a division of the National Weather Service.
“These outlooks provide critical guidance on the upcoming season for many industries and sectors of our economy, from energy producers to commodities markets to agricultural interests to tourism,” said Sarah Kapnick, Ph.D., NOAA chief scientist.
“With a strengthening El Nino and more potential climate
extremes in an already record-breaking year, we’re lucky to have scientists
like those at the Climate Prediction Center helping to build a Weather and
Climate-Ready Nation by providing critical operational seasonal climate
predictions.”
From December through February, NOAA predicts wetter-than-average conditions
for northern Alaska, portions of the West, the southern Plains, Southeast, Gulf
Coast and lower mid-Atlantic and drier-than-average conditions across the
northern tier of the U.S., especially in the northern Rockies and High Plains
and near the Great Lakes.
“An enhanced southern jet stream and associated moisture often present during strong El Nino events supports high odds for above-average precipitation for the Gulf Coast, lower Mississippi Valley and Southeast states this winter,” said Jon Gottschalck, chief of the Operational Prediction Branch of the Climate Prediction Center.
NOAA forecasters, in collaboration with the National
Integrated Drought Information System (NIDIS), continue to
monitor extreme, ongoing drought conditions that have persisted through the
southern and central U.S. and worsening drought in Hawaii.
“According to the Oct. 17 U.S. Drought Monitor, a third of the country, including Puerto Rico, is in drought,” said Brad Pugh, operational drought lead with NOAA’s Climate Prediction Center. “During late October, heavy precipitation is likely to result in drought improvement for the central U.S. El Nino with its enhanced precipitation is expected to provide drought relief to the southern U.S. during the next few months.”
Temperature
- Warmer-than-average
temperatures are favored across the northern tier of the U.S. and much of
the Far West.
- The greatest odds for warmer-than-average conditions
are in Alaska, the Pacific Northwest and northern New England.
- Near-normal
seasonal mean temperatures are most likely for a region from the
south-central Rockies to the southern Plains.
- Remaining areas fall into the category of equal chances for below-,
near-, or above-average seasonal mean temperatures.
Precipitation
- Wetter-than-average
conditions are most likely in northern Alaska, some areas of the West from
parts of California to the south-central Rockies, the southern Plains,
Gulf Coast, Southeast and lower mid-Atlantic.
- The greatest
odds for drier-than-average conditions are forecast in portions of the
northern Rockies and central Great Lakes region, especially for Michigan
and northern Ohio and Indiana.
- Much of the central portion of the U.S. falls into the category of equal chances for below-, near-, or above-average seasonal total precipitation.
[Drought section omitted - no such conditions forecast for the Northeast]
About NOAA's seasonal outlooks
NOAA’s seasonal outlooks provide the likelihood that temperatures and
total precipitation amounts will be above-, near- or below-average, and how
drought conditions are anticipated to change in the months ahead. The outlook
does not project seasonal snowfall accumulations as snow forecasts are
generally not predictable more than a week in advance.
NOAA’s Climate Prediction Center updates the three-month outlook each
month. The next update will be available November 16.
Seasonal outlooks help communities prepare for what is likely to come in
the months ahead and minimize weather's impacts on lives and livelihoods.
Resources such as drought.gov and climate.gov provide
comprehensive tools to better understand and plan for climate-driven hazards.
Empowering people with actionable forecasts, seasonal predictions and winter
weather safety tips is key to NOAA’s effort to build a
more Weather-
and Climate-Ready Nation.
Winter forecasting tools: Here’s what’s new at NOAA this year
- This winter,
NOAA will implement a series of upgrades and improvements. In November,
the experimental Probabilistic Winter Storm Severity Index (WSSI-P)
will become operational. The product will enhance communication with
external partners, media and the general public by graphically depicting
the likelihood of potential societal impacts due to expected winter
hazards over a 7-day period. This is complemented by a version of
the Winter Storm Severity Index (WSSI)
based on the official National Weather Service forecast of the most likely
conditions over the next three days.
- NOAA’s Weather
Prediction and Climate Prediction Centers will continue to use Winter Key
Messages, which highlight the agency’s most essential information for
upcoming winter weather, including extreme cold and heavy snow potential.
These can be found under “Top Stories” on the Weather
Prediction Center’s and Climate
Prediction Center’s websites.
- This winter, NOAA will complete its implementation of Impact-Based Warning Tags for Snow Squall Warnings. Snow Squall Warnings are warnings issued for short duration intense bursts of snow and wind leading to whiteout visibility and possible flash freezes on roads. To distinguish high-impact snow squalls, the National Weather Service will issue impact-based Snow Squall Warnings using the “Significant” tag for events that pose a substantial threat to safe travel. Wireless Emergency Alerts, emergency messages sent by authorized government alerting authorities through wireless carriers, will be limited to only high-impact Snow Squall Warnings with the Snow Squall Impact Tag of “Significant.”