Alert archive / Utah / Flash Flood Watches in 2021
Flash Flood Watch 3, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood watch at Jul 15, 2021, 2:53 AM MDT for 10 counties in Utah. It took effect at Jul 15, 2021, 12:00 PM MDT. It was in force for 16 hr.
The area
The counties it named.
The facts
- Issued
- Jul 15, 2021, 2:53 AM MDT (08:53 UTC)
- In effect from
- Jul 15, 2021, 12:00 PM MDT
- Expired
- Jul 16, 2021, 4:07 AM MDT
- In force
- 16 hr
- Issued by
- NWS Salt Lake City, UT
- Flood severity
- None
Counties Beaver County, UT, Emery County, UT, Garfield County, UT, Iron County, UT, Kane County, UT, Piute County, UT, San Juan County, UT, Sevier County, UT, Washington County, UT, Wayne County, UT
The radar
The Cedar City radar (KICX), 102 km from the middle of the area, began a volume at 08:56 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Salt Lake City I, UT (KSLC), launched 00:00Z, 8.9 hours before the alert went out and 302 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 592 J/kg
- Mixed-layer CIN
- -5 J/kg
- Mixed-layer LCL
- 3202 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 32 m²/s²
- 0-3 km storm-relative helicity
- 51 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
The text
As transmitted.
558 WGUS65 KSLC 150853 FFASLC URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Salt Lake City UT 253 AM MDT Thu Jul 15 2021 UTZ122>131-151700- /O.NEW.KSLC.FF.A.0003.210715T1800Z-210716T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Southwest Utah-Lower Washington County-Zion National Park-Southern Mountains-Upper Sevier River Valleys-Bryce Canyon Country-South Central Utah-Capitol Reef National Park and Vicinity-Western Canyonlands-Glen Canyon Recreation Area/Lake Powell- Including the cities of Bullfrog, Milford, Circleville, Kanab, Alton, St George, Torrey, Hurricane, Koosharem, Bryce Canyon City, Cedar City, Panguitch, Loa, Escalante, Springdale, Brian Head, Beaver, Ivins, Big Water, and Hanksville 253 AM MDT Thu Jul 15 2021 ...FLASH FLOOD WATCH IN EFFECT FROM NOON MDT TODAY THROUGH LATE THIS EVENING... The National Weather Service in Salt Lake City has issued a * Flash Flood Watch for a portion of Utah, including the following areas, Bryce Canyon Country, Capitol Reef National Park and Vicinity, Glen Canyon Recreation Area/Lake Powell, South Central Utah, Southern Mountains, Upper Sevier River Valleys, Western Canyonlands, Lower Washington County, Southwest Utah and Zion National Park. * From Noon MDT today through this evening. * Showers and thunderstorms will develop across the watch area this afternoon and evening. Heavy rainfall will be possible with any showers or thunderstorms. * Flash flooding is possible, especially in slot canyons, normally dry washes, areas in or near slickrock, and in vicinity of recent burn scars. Those venturing in the backcountry could encounter flooded, washed out or impassible roadways. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ CRK
6 follow-up statements
046 WGUS65 KSLC 151058 FFASLC Flood Watch National Weather Service Salt Lake City UT 458 AM MDT Thu Jul 15 2021 UTZ122>131-160600- /O.CON.KSLC.FF.A.0003.210715T1800Z-210716T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Southwest Utah-Lower Washington County-Zion National Park-Southern Mountains-Upper Sevier River Valleys-Bryce Canyon Country-South Central Utah-Capitol Reef National Park and Vicinity-Western Canyonlands-Glen Canyon Recreation Area/Lake Powell- Including the cities of Bullfrog, Milford, Circleville, Kanab, Alton, St George, Torrey, Hurricane, Koosharem, Bryce Canyon City, Cedar City, Panguitch, Loa, Escalante, Springdale, Brian Head, Beaver, Ivins, Big Water, and Hanksville 458 AM MDT Thu Jul 15 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT FROM NOON MDT TODAY THROUGH LATE THIS EVENING... The Flash Flood Watch continues for * A portion of Utah, including the following areas, Bryce Canyon Country, Capitol Reef National Park and Vicinity, Glen Canyon Recreation Area/Lake Powell, South Central Utah, Southern Mountains, Upper Sevier River Valleys, Western Canyonlands, Lower Washington County, Southwest Utah and Zion National Park. * From Noon MDT today through this evening. * Showers and thunderstorms will develop across the watch area this afternoon and evening. Heavy rainfall will be possible with any showers or thunderstorms. * Flash flooding is possible, especially in slot canyons, normally dry washes, areas in or near slickrock, and in vicinity of recent burn scars. Those venturing in the backcountry could encounter flooded, washed out or impassible roadways. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ CRK
243 WGUS65 KSLC 152130 FFASLC Flood Watch National Weather Service Salt Lake City UT 330 PM MDT Thu Jul 15 2021 UTZ122>131-160600- /O.CON.KSLC.FF.A.0003.000000T0000Z-210716T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Southwest Utah-Lower Washington County-Zion National Park-Southern Mountains-Upper Sevier River Valleys-Bryce Canyon Country-South Central Utah-Capitol Reef National Park and Vicinity-Western Canyonlands-Glen Canyon Recreation Area/Lake Powell- Including the cities of Bullfrog, Milford, Circleville, Kanab, Alton, St George, Torrey, Hurricane, Koosharem, Bryce Canyon City, Cedar City, Panguitch, Loa, Escalante, Springdale, Brian Head, Beaver, Ivins, Big Water, and Hanksville 330 PM MDT Thu Jul 15 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL MIDNIGHT MDT TONIGHT... The Flash Flood Watch continues for * A portion of Utah, including the following areas, Bryce Canyon Country, Capitol Reef National Park and Vicinity, Glen Canyon Recreation Area/Lake Powell, South Central Utah, Southern Mountains, Upper Sevier River Valleys, Western Canyonlands, Lower Washington County, Southwest Utah and Zion National Park. * Until Midnight MDT tonight. * Scattered showers and thunderstorms capable of producing heavy rainfall will remain possible through the evening hours. * Flash flooding is possible, especially in slot canyons, normally dry washes, areas in or near slickrock, and in vicinity of recent burn scars. Those venturing in the backcountry could encounter flooded, washed out or impassible roadways. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ MPS
660 WGUS65 KSLC 160119 FFASLC Flood Watch National Weather Service Salt Lake City UT 719 PM MDT Thu Jul 15 2021 UTZ129>131-160230- /O.CAN.KSLC.FF.A.0003.000000T0000Z-210716T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Capitol Reef National Park and Vicinity-Western Canyonlands-Glen Canyon Recreation Area/Lake Powell- Including the cities of Torrey, Bullfrog, Loa, Big Water, and Hanksville 719 PM MDT Thu Jul 15 2021 ...FLASH FLOOD WATCH IS CANCELLED... The Flash Flood Watch has been cancelled for a portion of Utah, including the following areas, Capitol Reef National Park and Vicinity, Glen Canyon Recreation Area/Lake Powell and Western Canyonlands. The threat for heavy rain has ended across the area. Therefore the Flash Flood Watch has been cancelled. $$ UTZ122>128-160600- /O.CON.KSLC.FF.A.0003.000000T0000Z-210716T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Southwest Utah-Lower Washington County-Zion National Park-Southern Mountains-Upper Sevier River Valleys-Bryce Canyon Country-South Central Utah- Including the cities of Milford, Circleville, Kanab, Alton, St George, Hurricane, Koosharem, Bryce Canyon City, Cedar City, Panguitch, Escalante, Springdale, Brian Head, Beaver, and Ivins 719 PM MDT Thu Jul 15 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL MIDNIGHT MDT TONIGHT... The Flash Flood Watch continues for * A portion of Utah, including the following areas, Bryce Canyon Country, South Central Utah, Southern Mountains, Upper Sevier River Valleys, Lower Washington County, Southwest Utah and Zion National Park. * Until Midnight MDT tonight. * Scattered showers and thunderstorms capable of producing heavy rainfall will remain possible through the evening hours. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ MPS
132 WGUS65 KSLC 160549 FFASLC URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Salt Lake City UT 1149 PM MDT Thu Jul 15 2021 UTZ122-125>128-160700- /O.EXP.KSLC.FF.A.0003.000000T0000Z-210716T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Southwest Utah-Southern Mountains-Upper Sevier River Valleys-Bryce Canyon Country-South Central Utah- Including the cities of Milford, Circleville, Kanab, Alton, Koosharem, Bryce Canyon City, Cedar City, Panguitch, Escalante, Brian Head, and Beaver 1149 PM MDT Thu Jul 15 2021 ...FLASH FLOOD WATCH WILL EXPIRE AT MIDNIGHT MDT TONIGHT... The Flash Flood Watch will expire at Midnight MDT tonight for a portion of Utah, including the following areas, Bryce Canyon Country, South Central Utah, Southern Mountains, Upper Sevier River Valleys and Southwest Utah. The Flood Watch is cancelled. Flooding is no longer expected to pose a threat. Please continue to heed remaining road closures. $$ UTZ123-124-160900- /O.EXT.KSLC.FF.A.0003.000000T0000Z-210716T0900Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Lower Washington County-Zion National Park- Including the cities of St George, Ivins, Hurricane, and Springdale 1149 PM MDT Thu Jul 15 2021 ...FLASH FLOOD WATCH NOW IN EFFECT UNTIL 3 AM MDT FRIDAY... The Flash Flood Watch is now in effect for * A portion of Utah, including the following areas, Lower Washington County and Zion National Park. * Until 3 AM MDT Friday. * Scattered showers and thunderstorms capable of producing heavy rainfall will remain possible through the early morning hours. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ Church
819 WGUS65 KSLC 160850 FFASLC URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Salt Lake City UT 250 AM MDT Fri Jul 16 2021 UTZ123-124-161200- /O.EXT.KSLC.FF.A.0003.000000T0000Z-210716T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Lower Washington County-Zion National Park- Including the cities of St George, Ivins, Hurricane, and Springdale 250 AM MDT Fri Jul 16 2021 ...FLASH FLOOD WATCH NOW IN EFFECT UNTIL 6 AM MDT EARLY THIS MORNING... The Flash Flood Watch is now in effect for * A portion of Utah, including the following areas, Lower Washington County and Zion National Park. * Until 6 AM MDT early this morning. * Scattered showers and thunderstorms capable of producing heavy rainfall will remain possible through the early morning hours. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ CRK
608 WGUS65 KSLC 161007 FFASLC Flood Watch National Weather Service Salt Lake City UT 407 AM MDT Fri Jul 16 2021 UTZ123-124-161115- /O.CAN.KSLC.FF.A.0003.000000T0000Z-210716T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Lower Washington County-Zion National Park- Including the cities of St George, Ivins, Hurricane, and Springdale 407 AM MDT Fri Jul 16 2021 ...FLASH FLOOD WATCH IS CANCELLED... The Flash Flood Watch has been cancelled for a portion of Utah, including the following areas, Lower Washington County and Zion National Park. The heavy rain has ended. Elevated flows will continue across slot canyons, normally dry washes and streams in the area through at least mid-morning. $$ CRK
The office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 14, 6:20 PM MDT | Special Weather Statement | SLC | Emery | 40 min |
| Jul 14, 6:25 PM MDT | Severe Thunderstorm Warning | SLC | Iron, Washington | 50 min |
| Jul 14, 6:49 PM MDT | Special Weather Statement | SLC | Iron | 41 min |
| Jul 14, 7:07 PM MDT | Flash Flood Warning | SLC | Kane, Washington | 3 hr |
| Jul 14, 7:53 PM MDT | Severe Thunderstorm Warning | SLC | Washington | 69 min |
| Jul 15, 4:43 PM MDT | Special Weather Statement | SLC | Carbon | 47 min |
| Jul 15, 5:01 PM MDT | Special Weather Statement | SLC | Garfield | 44 min |
| Jul 15, 5:03 PM MDT | Special Weather Statement | SLC | Tooele | 57 min |
| Jul 15, 5:29 PM MDT | Special Weather Statement | SLC | Weber | 61 min |
Nearby
Flash Flood Watches in Utah, 2021Every flash flood watch in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.