Day: September 12, 2024

US heating demand typically surpasses cooling demand after autumnal equinox

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US heating demand typically surpasses cooling demand after autumnal equinox

Data from the U.S. Energy Information Administration suggests that heating a home is more costly for consumers than cooling the same property during the warm season. A heating degree day (HDD) is calculated by determining how many degrees the temperature drops below 65 °F. For example, a day with an average temperature of 50 °F is considered to have 15 HDDs. A cooling degree day (CDD) measures how much the average temperature is above 65 °F. For instance, a day with an average temperature of 77 °F is considered to have 12 CDDs.

SPC Severe Thunderstorm Watch 672

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WW 672 SEVERE TSTM MT ND 122235Z – 130400Z
WW 0672 Image

 URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 672
NWS Storm Prediction Center Norman OK
435 PM MDT Thu Sep 12 2024 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Northeastern and Eastern Montana Western North Dakota * Effective this Thursday afternoon and evening from 435 PM until 1000 PM MDT. * Primary threats include... Scattered damaging winds and isolated significant gusts to 85 mph likely Scattered large hail events to 1.5 inches in diameter possible SUMMARY...Scattered thunderstorms will continue to develop and
intensify late this afternoon and evening and spread northeast into
the Watch area. The stronger thunderstorms, including a mix of
cells and linear clusters, will be potentially capable of a severe
threat. Severe gusts will probably be the primary severe hazard
(60-85 mph), but large hail may accompany the stronger thunderstorm
cores as well (1 to 1.5 inches in diameter). The severe thunderstorm watch area is approximately along and 85
statute miles north and south of a line from 35 miles west southwest
of Glasgow MT to 55 miles northeast of Dickinson ND. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU2). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Severe Thunderstorm Watch means conditions are
favorable for severe thunderstorms in and close to the watch area.
Persons in these areas should be on the lookout for threatening
weather conditions and listen for later statements and possible
warnings. Severe thunderstorms can and occasionally do produce
tornadoes. && OTHER WATCH INFORMATION...CONTINUE...WW 670...WW 671... AVIATION...A few severe thunderstorms with hail surface and aloft to
1.5 inches. Extreme turbulence and surface wind gusts to 75 knots. A
few cumulonimbi with maximum tops to 400. Mean storm motion vector
21050. ...Smith

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SPC Tornado Watch 671

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WW 671 TORNADO AL 122135Z – 130300Z
WW 0671 Image

 URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 671
NWS Storm Prediction Center Norman OK
435 PM CDT Thu Sep 12 2024 The NWS Storm Prediction Center has issued a * Tornado Watch for portions of Central Alabama * Effective this Thursday afternoon and evening from 435 PM until 1000 PM CDT. * Primary threats include... A couple tornadoes possible SUMMARY...A convective band within a moist and strongly sheared
environment will feature embedded quasi-discrete updrafts late this
afternoon into the evening. Several supercells will potentially
pose a tornado risk before instability wanes late this evening. The tornado watch area is approximately along and 55 statute miles
north and south of a line from 55 miles northwest of Selma AL to 45
miles northeast of Montgomery AL. For a complete depiction of the
watch see the associated watch outline update (WOUS64 KWNS WOU1). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Tornado Watch means conditions are favorable for
tornadoes and severe thunderstorms in and close to the watch
area. Persons in these areas should be on the lookout for
threatening weather conditions and listen for later statements
and possible warnings. && OTHER WATCH INFORMATION...CONTINUE...WW 670... AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 0 inches. Extreme turbulence and surface wind
gusts to 50 knots. A few cumulonimbi with maximum tops to 400. Mean
storm motion vector 20020. ...Smith

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