Locally heavy rainfall resulted in flash flooding along Sulphur Creek in Capitol Reef National Park.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS SLC wrote it up.
Locally heavy rainfall resulted in flash flooding along Sulphur Creek in Capitol Reef National Park.
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 Aug 1, 3:43 PM MST, 2 hours 17 minutes earlier.
Area Forecast Discussion National Weather Service Salt Lake City UT 443 PM MDT Thu Aug 1 2019 .SYNOPSIS...Scattered showers and thunderstorms, mostly tied to the higher terrain will gradually decrease in areal coverage this evening. A gradual drying trend will begin Friday and continue into Saturday, followed by a return of moisture from the south late in the weekend. && .SHORT TERM (Until 00Z Monday)...Animated GOES TPW imagery still shows a moist air mass in place across the entire forecast area late this afternoon. Convection this afternoon has remained terrain-tied in the absence of any definable dynamic forcing over the state (so far). Water vapor imagery does suggest that the a mid-level shortwave is moving northeast through central Nevada at this time. Rather robust convection has formed ahead of this feature across northeast Nevada/south-central Idaho, with a combination of heavy rain and possible severe storms with the stronger convective elements. Strong convection may struggle to advance east into Utah this evening. Convective indices across northwest Utah are less than favorable outside of areas near the Nevada and Idaho borders. A couple of stronger stroms could work a bit deeper into the northwest along the shortwave, otherwise just looking at weak and decaying convection across the northwest through around mid- evening. A gradual downward trend in available moisture is expected Friday through most of Saturday. Still looking at sufficient moisture along with decent differential heating to support terrain-based afternoon/early evening convection through Saturday. Not looking for any significant rainfall from the expected convection due to the reduced available moisture and weak dynamic forcing both days. A new moisture surge is expected to enter southern Utah late Saturday. This moisture will advance quickly north across western Utah, and into east-central Utah by early Sunday. Should see a notable increase in convection Sunday, with the showers and storms over/near the southern/central mountains capable of generating pockets of heavy rain late in the day. .LONG TERM (After 00Z Monday)...Ensembles shift summertime upper level high center from Four Corners back into Arizona for Monday and Tuesday. This would not favor a good monsoonal push but enough residual moisture remains in place over Utah for some scattered afternoon and evening thunderstorms over the central and south. Otherwise dry and seasonally hot. The ridge axis shifts back to the east as a trough digs just off the Pacific Northwest coast. This puts Utah and southwest Wyoming into a southwest flow aloft. The EPS and GEFS differ on trends at this point with EPS a little more positive on PoPs increasing or staying in the scattered range for Wednesday and Thursday. Trend with EPS from 00Z to 12Z version is more like the drier GEFS. Hence enough uncertainty to leave scattered storms both afternoons in roughly same favored areas in the central and south. && .AVIATION...Light northwest winds at the SLC terminal will become southerly around 04Z. VFR conditions expected through the TAF period. && .FIRE WEATHER...Residual moisture has once again spawned showers and thunderstorms closely tied to the higher terrain late this afternoon. This activity will produce locally heavy rain before the showers and storms begin to dissipate early in the evening. Moisture will gradually decrease Friday and Saturday, though sufficient moisture will remain for terrain-based showers and storms both afternoons. A new moisture surge will return to southern Utah late Saturday, then continue north across western and east-central Utah Sunday. Showers and thunderstorms will increase in areal coverage Sunday, with wetting rains possible across mainly the southern and central fire districts. This moisture surge may struggle to sustain itself as drier westerlies could invade Utah Monday night/Tuesday, followed by a new moisture surge working north through the western Great Basin midweek. && .SLC WATCHES/WARNINGS/ADVISORIES... UT...None. WY...None. && SHORT TERM/FIRE WEATHER...CONGER LONG TERM/AVIATION...BILLINGSLEY 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 645 PM MDT Thu Aug 1 2019 UTZ001>016-019>021-517-518-WYZ021-021400- 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- 645 PM MDT Thu Aug 1 2019 This Hazardous Weather Outlook is for the western two thirds of Utah and southwest Wyoming. .DAY ONE...Tonight No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Friday through Wednesday The next moisture surge is expected Sunday, when locally heavy rainfall will be possible. There is a risk of flash flooding on Sunday, particularly near burn scars, slot canyons, normally dry washes, and areas of poor drainage. .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
Special Weather Statement
National Weather Service Salt Lake City UT
500 PM MDT Thu Aug 1 2019
UTZ005-020000-
Great Salt Lake Desert and Mountains UT-
500 PM MDT Thu Aug 1 2019
...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL TOOELE COUNTY UNTIL
600 PM MDT...
At 500 PM MDT, National Weather Service Doppler radar indicated a
strong thunderstorm 16 miles north of Ibapah, or 32 miles south of
Wendover...moving northeast at 10 mph.
Penny size hail and wind gusts of 40 to 55 mph will be possible.
This storm will remain over mainly rural areas of west central Tooele
County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If threatening weather approaches, take shelter in a sturdy building.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
This storm may intensify, so be certain to monitor local radio and
available television stations for additional information and possible
warnings from the National Weather Service.
&&
LAT...LON 4056 11397 4042 11367 4015 11394 4020 11404
4041 11405
TIME...MOT...LOC 2300Z 211DEG 10KT 4027 11400
10The Cedar City radar (KICX), 165 km away, was scanning. The volume nearest the first event began at 00:57 UTC.
1 flash flood. Local standard time, as filed.
Flash flooding occurred along Sulphur Creek, with flows increased rapidly by upwards of 4 feet.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Utah in 2019Every state in 2019This day in weather historyWarnings in Utah, August 2019
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: 852699.