A cold front moved through northern Utah on October 9, bringing some strong winds to the northwest deserts.
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The episode as NWS SLC wrote it up.
A cold front moved through northern Utah on October 9, bringing some strong winds to the northwest deserts.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Salt Lake City, UT wrote its last area forecast discussion before the first event at Oct 9, 2:47 PM MST, 3 hours 13 minutes earlier.
Area Forecast Discussion National Weather Service Salt Lake City UT 347 PM MDT Tue Oct 9 2018 .SYNOPSIS...An unsettled and cool pattern will continue across the region with multiple disturbances expected to impact Utah through this week. && .SHORT TERM (Through 00Z Saturday)...A large upper level ridge is currently stretching across the eastern Pacific with an upper level trough across the Interior West into the Rocky Mountain States. A series of shortwaves will dig on the west side of the trough and bring an extended period of unsettled weather with mountain snow and valley rain to Utah. The first shortwave is currently digging southeastward across eastern Oregon and northern Nevada. The associated 115-120kt jet maxima will continue to bring synoptic scale lift to northern Utah. Widespread precipitation is filling in ahead of the main wave and associated mid-level front. Expect the mid-level front to cross northern Utah later this evening into tonight. Persistent lift combined with deep moisture should bring widespread valley rain and mountain snow through the overnight hours and into Wednesday morning. Have issued winter weather advisories for the northern mountains and Uinta County Wyoming with the afternoon package for a widespread 5 to 10 inches of snow with isolated higher amounts (less in Wyoming). All seasonal roads in Utah remain open with the exception of Guardsman Pass. In addition, some of the higher summits including Parleys and Logan may see occasional road slush overnight and into the Wednesday morning commute. Mountain snow and valley rain will wind down early Wednesday morning. The trough will become elongated to the south and west Wednesday into Thursday and several weakening shortwaves will round the southwest and then southern portion of this trough...bringing another period of precipitation to mainly central and southern Utah Thursday into early Friday. .LONG TERM (After 00Z Saturday)...The primary feature to focus on during the long term period is a progressive short wave clipper that is expected to translate south-southeast across namely the northeastern portions of the area Saturday night-Sunday. With passage of the mid level short wave, a relatively shallow and moisture starved cold front will track south across the area reaching the UT/AZ line by Sunday morning. With this, marked cooling is anticipated for all areas into early next week, while light/showery precip (largely snow) will be kicked off Saturday night into Sunday morning across the far north/east (focused mtns). The big takeaway from this short wave will be the breadth of low level CAA in the wake of the cold frontal passage, as H7 temps continue to look to fall into the -10 to -11C range across the northeast, and as low as -5 to -6C across the southwest. As such, temps are expected to fall to some 10-20 degrees below climo Sunday into Monday, with highs only in the upper 40s along the I-15 corridor from the ID line south to Cedar City (Sunday), with widespread freeze/frost conditions most all areas (Sunday night). Introduced enhanced gap winds for Washington County Sunday/Sunday night, and expect enhanced canyon winds along the Wasatch Front as well during that timeframe. Modest at best, but still notable. Heights will build across the area through the mid week period as high pressure reorients along the west coast, while bulging east into the northern Rockies region. This is likely the first signs of a pattern shift that will phase back into a drier/milder regime for the latter half of the month, but we'll see how things evolve with time. For the latter half of this forecast however, this looks to hold true with gradual warming and a dry forecast. && .AVIATION...The storm system advancing south towards northern Utah will bring steadily lowering ceilings and rain to the SLC Terminal tonight through at least Wednesday morning. VFR conditions will continue through around 03Z, with ceilings dropping below 6000 feet between 00Z and 01Z. Conditions will drop into the MVFR range as both visibilities and ceilings lower due to precipitation. South-southeast winds will remain gusty through the balance of the afternoon, then decrease and eventually turn to a light northerly direction as rain intensities peak after 03Z. && .SLC WATCHES/WARNINGS/ADVISORIES... UT...Winter Weather Advisory until 9 AM MDT Wednesday for UTZ007>010. WY...Winter Weather Advisory until 9 AM MDT Wednesday for WYZ021. && Kruse/Merrill/Conger For more information from NOAA's National Weather Service visit... http://weather.gov/saltlakecity For frequently asked questions about the Area Forecast Discussion visit... http://weather.gov/saltlakecity/general/afd_faqs.php
Hazardous Weather Outlook National Weather Service Salt Lake City UT 351 PM MDT Tue Oct 9 2018 UTZ001>016-019>021-517-518-WYZ021-101300- Cache Valley/Utah Portion-Northern Wasatch Front- Salt Lake and Tooele Valleys-Southern Wasatch Front- Great Salt Lake Desert and Mountains-Wasatch Mountain Valleys- Wasatch Mountains I-80 North-Wasatch Mountains South of I-80- Western Uinta Mountains-Wasatch Plateau/Book Cliffs- Western Uinta Basin-Castle Country-San Rafael Swell- Sanpete/Sevier Valleys-West Central Utah-Southwest Utah- Utahs Dixie and Zion National Park-South Central Utah- Glen Canyon Recreation Area/Lake Powell-Central Mountains- Southern Mountains-Southwest Wyoming- 351 PM MDT Tue Oct 9 2018 This Hazardous Weather Outlook is for the western two thirds of Utah and southwest Wyoming. .DAY ONE...This Afternoon and Tonight Accumulating snow is expected across the higher terrain of northern and central Utah later this afternoon into tonight. Those traveling on high elevation seasonal roads should be prepared for winter driving conditions through the night. .DAYS TWO THROUGH SEVEN...Wednesday through Monday Accumulating mountain snow is expected through Wednesday morning. Occasional winter driving conditions can be expected on passes including Parleys and Logan during the Wednesday morning commute. Another round of accumulating snow is expected for the central and southern Utah mountains late Wednesday night into early Friday morning. Winter driving conditions will be possible across high elevation roads in the area. A hard freeze will be possible Sunday and Monday mornings for portions of the state including the northern Wasatch Front and the west central and southwest valleys. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. For more information from NOAA/s National Weather Service visit... http://weather.gov/saltlakecity For information on potential road travel impacts visit... http://www.udottraffic.utah.gov/roadweatherforecast.aspx
The Salt Lake City radar (KMTX), 147 km away, was scanning. The volume nearest the first event began at 01:02 UTC.
1 thunderstorm wind. Local standard time, as filed.
The West Granite sensor in the U.S. Army Dugway Proving Ground mesonet reported a peak wind gust of 63 mph.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Utah in 2018Every state in 2018This day in weather historyWarnings in Utah, October 2018
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 782602.