Alert archive / Utah / Flash Flood Warnings in 2020
Flash Flood Warning 2, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Mar 13, 2020, 1:01 PM MDT for Washington County, Utah. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Mar 13, 2020, 1:01 PM MDT (19:01 UTC)
- Expired
- Mar 13, 2020, 4:00 PM MDT
- In force
- 3 hr
- Issued by
- NWS Salt Lake City, UT
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
County Washington County, UT
The radar
The Cedar City radar (KICX), 38 km from the middle of the area, began a volume at 19:03 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
Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 7.0 hours before the alert went out and 248 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
- 1 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 671 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- -17 m²/s²
- 0-3 km storm-relative helicity
- -202 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
560
WGUS55 KSLC 131901
FFWSLC
UTC053-132200-
/O.NEW.KSLC.FF.W.0002.200313T1901Z-200313T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Salt Lake City UT
101 PM MDT Fri Mar 13 2020
The National Weather Service in Salt Lake City has issued a
* Flash Flood Warning for...
East central Washington County in northern Utah...Specifically for
Zion National Park
* Until 400 PM MDT
* At 1255 PM MDT, Park rangers in Zion National Park continue to
report residual flash flooding in the following slot canyons above
the scenic drive...Echo...Hidden...Telephone...and Refrigerator
canyons. Up to 1.5 inches of rainfall has fallen since midnight
last night, and additional rainfall up to .25 inches is expected
through 4pm.
HAZARD...Life threatening flash flooding. Heavy rain producing
flash flooding.
SOURCE...Law enforcement.
IMPACT...Life threatening flash flooding of slot canyons above the
scenic drive.
* Some locations that will experience flooding include...
Zion National Park and Springdale.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Flooding is occurring or is imminent. It is important to know where
you are relative to streams, rivers, or creeks which can become
killers in heavy rains. Campers and hikers should avoid streams or
creeks.
&&
LAT...LON 3734 11291 3714 11291 3714 11301 3734 11299
FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
GM1 follow-up statement
813 WGUS75 KSLC 132202 FFSSLC Flash Flood Statement National Weather Service Salt Lake City UT 402 PM MDT Fri Mar 13 2020 UTC053-132208- /O.EXP.KSLC.FF.W.0002.000000T0000Z-200313T2200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Washington UT- 402 PM MDT Fri Mar 13 2020 ...THE FLASH FLOOD WARNING FOR EAST CENTRAL WASHINGTON COUNTY WILL EXPIRE AT 400 PM MDT... The heavy rain has ended and only periodic light rain showers are expected into this evening. Elevated flows continue in slot canyons above the scenic drive including Echo...Hidden...Telephone...and Refrigerator canyons, but flows are receding. Continue to heed any remaining park closures. LAT...LON 3734 11291 3714 11291 3714 11301 3734 11299 $$ GM
The office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 13, 3:19 AM MDT | Winter Weather Advisory | SLC | 19 hr | |
| Mar 13, 9:44 AM MDT | Flash Flood Warning | SLC | Washington | 3 hr |
Nearby
Flash Flood Warnings in Utah, 2020Every flash flood warning in 2020
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.