Alert archive / Utah / Flash Flood Watches in 2021
Flash Flood Watch 5, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood watch at Jul 22, 2021, 2:43 AM MDT for 6 counties in Utah. It took effect at Jul 22, 2021, 11:00 AM MDT. It was in force for 12 hr.
The area
The counties it named.
The facts
- Issued
- Jul 22, 2021, 2:43 AM MDT (08:43 UTC)
- In effect from
- Jul 22, 2021, 11:00 AM MDT
- Expired
- Jul 22, 2021, 10:44 PM MDT
- In force
- 12 hr
- Issued by
- NWS Salt Lake City, UT
- Flood severity
- None
Counties Emery County, UT, Garfield County, UT, Kane County, UT, Sevier County, UT, Washington County, UT, Wayne County, UT
The radar
The Cedar City radar (KICX), 115 km from the middle of the area, began a volume at 08:45 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, 8.7 hours before the alert went out and 301 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
- 175 J/kg
- Mixed-layer CIN
- -17 J/kg
- Mixed-layer LCL
- 3232 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- 9 m²/s²
- 0-3 km storm-relative helicity
- 45 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
861 WGUS65 KSLC 220843 FFASLC URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Salt Lake City UT 243 AM MDT Thu Jul 22 2021 UTZ128-129-221645- /O.NEW.KSLC.FF.A.0005.210722T1700Z-210723T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ South Central Utah-Capitol Reef National Park and Vicinity- Including the cities of Torrey, Loa, Escalante, and Kanab 243 AM MDT Thu Jul 22 2021 ...FLASH FLOOD WATCH IN EFFECT FROM 11 AM MDT THIS MORNING THROUGH 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, Capitol Reef National Park and Vicinity and South Central Utah. * From 11 AM MDT this morning through this evening. * Thunderstorms capable of heavy rainfall are expected to develop and train off of Boulder Mountain today, and may move down sensitive drainages and slot canyons in Capitol Reef National Park as well as in the Escalante River basin. * Heavy rainfall may result in flash flooding, especially in area slot canyons, and normally dry washes and streams. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts and be prepared to take action should Flash Flood Warnings be issued. Consider avoiding slot canyons and normally dry washes. && $$ Church
3 follow-up statements
688 WGUS65 KSLC 221343 FFASLC Flood Watch National Weather Service Salt Lake City UT 743 AM MDT Thu Jul 22 2021 UTZ128-129-230600- /O.CON.KSLC.FF.A.0005.210722T1700Z-210723T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ South Central Utah-Capitol Reef National Park and Vicinity- Including the cities of Torrey, Loa, Escalante, and Kanab 743 AM MDT Thu Jul 22 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT FROM 11 AM MDT THIS MORNING THROUGH THIS EVENING... The Flash Flood Watch continues for * A portion of Utah, including the following areas, Capitol Reef National Park and Vicinity and South Central Utah. * From 11 AM MDT this morning through this evening. * Thunderstorms capable of heavy rainfall are expected to develop and train off of Boulder Mountain today, and may move down sensitive drainages and slot canyons in Capitol Reef National Park as well as in the Escalante River basin. * Heavy rainfall may result in flash flooding, especially in area slot canyons, and normally dry washes and streams. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts and be prepared to take action should Flash Flood Warnings be issued. Consider avoiding slot canyons and normally dry washes. && $$ MS
745 WGUS65 KSLC 221754 FFASLC URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Salt Lake City UT 1154 AM MDT Thu Jul 22 2021 UTZ124-125-230600- /O.NEW.KSLC.FA.A.0001.210722T1754Z-210723T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Zion National Park-Southern Mountains- Including the cities of Brian Head, Springdale, and Alton 1154 AM MDT Thu Jul 22 2021 ...FLOOD WATCH IN EFFECT THROUGH THIS EVENING... The National Weather Service in Salt Lake City has issued a * Flood Watch for a portion of Utah, including the following areas, Southern Mountains and Zion National Park. * Through this evening. * Thunderstorms capable of heavy rainfall are expected to develop and train off of Boulder Mountain today, and may move down sensitive drainages and slot canyons in Capitol Reef National Park as well as in the Escalante River basin. * Heavy rainfall may result in flash flooding, especially in area slot canyons, and normally dry washes and streams. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop. && $$ UTZ128-129-230600- /O.CON.KSLC.FF.A.0005.000000T0000Z-210723T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ South Central Utah-Capitol Reef National Park and Vicinity- Including the cities of Torrey, Loa, Escalante, and Kanab 1154 AM MDT Thu Jul 22 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH THIS EVENING... The Flash Flood Watch continues for * A portion of Utah, including the following areas, Capitol Reef National Park and Vicinity and South Central Utah. * Through this evening. * Thunderstorms capable of heavy rainfall are expected to develop and train off of Boulder Mountain today, and may move down sensitive drainages and slot canyons in Capitol Reef National Park as well as in the Escalante River basin. * Heavy rainfall may result in flash flooding, especially in area slot canyons, and normally dry washes and streams. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts and be prepared to take action should Flash Flood Warnings be issued. Consider avoiding slot canyons and normally dry washes. && $$ MS
358 WGUS65 KSLC 230444 FFASLC Flood Watch National Weather Service Salt Lake City UT 1044 PM MDT Thu Jul 22 2021 UTZ128-129-230545- /O.CAN.KSLC.FF.A.0005.000000T0000Z-210723T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ South Central Utah-Capitol Reef National Park and Vicinity- Including the cities of Torrey, Loa, Escalante, and Kanab 1044 PM MDT Thu Jul 22 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 and South Central Utah. The Flood Watch is cancelled. Flooding is no longer expected to pose a threat tonight. Please continue to heed remaining road closures. $$ UTZ124-125-230545- /O.CAN.KSLC.FA.A.0001.000000T0000Z-210723T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Zion National Park-Southern Mountains- Including the cities of Brian Head, Springdale, and Alton 1044 PM MDT Thu Jul 22 2021 ...FLOOD WATCH IS CANCELLED... The Flood Watch has been cancelled for a portion of Utah, including the following areas, Southern Mountains and Zion National Park. The Flood Watch is cancelled. Flooding is no longer expected to pose a threat tonight. Please continue to heed remaining road closures. $$ WFO SLC
The office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 8:41 PM MDT | Flash Flood Warning | SLC | Kane | 6 hr |
| Jul 22, 11:16 AM MDT | Special Weather Statement | SLC | Piute | 29 min |
| Jul 22, 11:41 AM MDT | Special Weather Statement | SLC | 49 min | |
| Jul 22, 11:54 AM MDT | Flood Watch | SLC | Beaver, Garfield, Iron, Kane, Piute, Washington and 1 more | 11 hr |
| Jul 22, 1:02 PM MDT | Special Weather Statement | SLC | Iron | 43 min |
| Jul 22, 1:13 PM MDT | Special Weather Statement | SLC | Garfield | 32 min |
| Jul 22, 1:18 PM MDT | Areal Flood Advisory | SLC | Iron | 117 min |
| Jul 22, 1:20 PM MDT | Severe Thunderstorm Warning | SLC | Garfield | 25 min |
| Jul 22, 1:45 PM MDT | Special Weather Statement | SLC | Kane | 45 min |
| Jul 22, 2:00 PM MDT | Special Weather Statement | SLC | Beaver | 30 min |
| Jul 22, 2:13 PM MDT | Flash Flood Warning | SLC | Garfield, Kane | 3 hr |
| Jul 22, 2:13 PM MDT | Severe Thunderstorm Warning | SLC | Beaver | 32 min |
| Jul 22, 2:34 PM MDT | Flash Flood Warning | SLC | Kane, Washington | 3 hr |
| Jul 22, 2:42 PM MDT | Areal Flood Advisory | SLC | Beaver | 2 hr |
| Jul 22, 2:58 PM MDT | Severe Thunderstorm Warning | SLC | Washington | 32 min |
| Jul 22, 3:08 PM MDT | Flash Flood Warning | SLC | Garfield, Wayne | 3 hr |
| Jul 22, 3:14 PM MDT | Flash Flood Warning | SLC | Garfield, Kane | 5 hr |
| Jul 22, 3:14 PM MDT | Special Weather Statement | SLC | Washington | 46 min |
| Jul 22, 3:30 PM MDT | Severe Thunderstorm Warning | SLC | Garfield | |
| Jul 22, 3:46 PM MDT | Flash Flood Warning | SLC | Garfield, Kane | 7 hr |
| Jul 22, 4:02 PM MDT | Severe Thunderstorm Warning | SLC | Iron | 28 min |
| Jul 22, 4:15 PM MDT | Special Weather Statement | SLC | Box Elder | 30 min |
| Jul 22, 4:28 PM MDT | Severe Thunderstorm Warning | SLC | Iron | 32 min |
| Jul 22, 4:48 PM MDT | Special Weather Statement | SLC | Washington | 27 min |
| Jul 22, 5:51 PM MDT | Special Weather Statement | SLC | 39 min | |
| Jul 22, 5:58 PM MDT | Flash Flood Warning | SLC | Utah | 3 hr |
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.