Alert archive / Utah / Flash Flood Warnings in 2017
Flash Flood Warning 49, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Sep 15, 2017, 5:45 PM MDT for Garfield County, Wayne County, Utah. It was in force for 4 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
- Sep 15, 2017, 5:45 PM MDT (23:45 UTC)
- Expired
- Sep 15, 2017, 9:45 PM MDT
- In force
- 4 hr
- Issued by
- NWS Salt Lake City, UT
- Area
- Storm-based polygon
- Flood severity
- None
Counties Garfield County, UT, Wayne County, UT
The radar
The Cedar City radar (KICX), 165 km from the middle of the area, began a volume at 23:48 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
Grand Junction, CO (KGJT), launched 12:00Z, 11.8 hours before the alert went out and 252 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
- 2 J/kg
- Mixed-layer CIN
- -96 J/kg
- Mixed-layer LCL
- 1272 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 221 m²/s²
- 0-3 km storm-relative helicity
- 306 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
533 WGUS55 KSLC 152345 FFWSLC UTC017-055-160345- /O.NEW.KSLC.FF.W.0049.170915T2345Z-170916T0345Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED Flash Flood Warning National Weather Service Salt Lake City UT 545 PM MDT FRI SEP 15 2017 The National Weather Service in Salt Lake City has issued a * Flash Flood Warning for... North central Garfield County in southern Utah... South central Wayne County in southern Utah... * Until 945 PM MDT * At 538 PM MDT, Park Rangers in Capitol Reef National Park reported flash flooding on Pleasant Creek. Flash flooding is already occurring. * Flash flooding is only affecting the Pleasant Creek drainage in Capitol Reef National Park. Other primary washes in the park such as Grand wash are not flooding at this time. * Additional rainfall is expected in this area and Pleasant Creek is expected to continue to flood into this evening. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain alert for flooding even in locations not receiving rain. Dry washes, streams, and rivers can become raging killer currents in a matter of minutes, even from distant rainfall. 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 in the Capitol Reef area. && LAT...LON 3826 11105 3797 11099 3797 11120 3821 11127 $$ PW
2 follow-up statements
543 WGUS75 KSLC 160144 FFSSLC Flash Flood Statement National Weather Service Salt Lake City UT 744 PM MDT FRI SEP 15 2017 UTC017-055-160345- /O.CON.KSLC.FF.W.0049.000000T0000Z-170916T0345Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Garfield UT-Wayne UT- 744 PM MDT FRI SEP 15 2017 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 945 PM MDT FOR NORTH CENTRAL GARFIELD AND SOUTH CENTRAL WAYNE COUNTIES... At 737 PM MDT, rain had ended across Capitol Reef National Park and the threat of any additional rainfall is small. However, flood waters in Pleasant Creek will take a while longer to recede. Visitors in Capitol Reef National Park are urged to avoid the Pleasant Creek area tonight. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain alert for flooding even in locations not receiving rain. Dry washes, streams, and rivers can become raging killer currents in a matter of minutes, even from distant rainfall. Flooding is occurring or is imminent. It is important to know where you are relative to streams, rivers, or creeks which can become killers in heavy rains. Campers and hikers should avoid streams or creeks in the southern portions of Capitol Reef National Park. && LAT...LON 3826 11105 3797 11099 3797 11120 3821 11127 $$ PW
907 WGUS75 KSLC 160338 FFSSLC Flash Flood Statement National Weather Service Salt Lake City UT 938 PM MDT FRI SEP 15 2017 UTC017-055-160347- /O.EXP.KSLC.FF.W.0049.000000T0000Z-170916T0345Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Garfield UT-Wayne UT- 938 PM MDT FRI SEP 15 2017 ...THE FLASH FLOOD WARNING FOR NORTH CENTRAL GARFIELD AND SOUTH CENTRAL WAYNE COUNTIES WILL EXPIRE AT 945 PM MDT... Flooding is no longer expected to pose a threat. Please continue to heed any remaining road closures. LAT...LON 3826 11105 3797 11099 3797 11120 3821 11127 $$ PW
The office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 14, 6:26 PM MDT | Special Weather Statement | SLC | 34 min | |
| Sep 15, 7:02 AM MDT | Areal Flood Advisory | SLC | Davis, Weber | 3 hr |
| Sep 15, 9:11 AM MDT | Areal Flood Advisory | SLC | Salt Lake | 64 min |
| Sep 15, 10:16 AM MDT | Areal Flood Advisory | SLC | Salt Lake, Utah | 119 min |
| Sep 15, 3:17 PM MDT | Special Weather Statement | SLC | 43 min |
Nearby
Flash Flood Warnings in Utah, 2017Every flash flood warning in 2017
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.