Alert archive / Utah / Flash Flood Warnings in 2016
Flash Flood Warning 16, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Aug 10, 2016, 1:40 PM MDT for Kane County, Washington County, Utah. It was in force for 4 hr. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 10, 2016, 1:40 PM MDT (19:40 UTC)
- Expired
- Aug 10, 2016, 5:45 PM MDT
- In force
- 4 hr
- Issued by
- NWS Salt Lake City, UT
- Area
- Storm-based polygon
- Flood severity
- None
Counties Kane County, UT, Washington County, UT
The radar
The Cedar City radar (KICX), 41 km from the middle of the area, began a volume at 19:43 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 10, 2:17 PM MDT | FLASH FLOOD | Zion Np, UT | FLASH FLOODING REPORTED IN ZION NP. SR9 IS CLOSED DUE TO FLOODING AND MUDSLIDES. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 7.7 hours before the alert went out and 245 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
- 905 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 636 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 53 m²/s²
- 0-3 km storm-relative helicity
- 81 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.0
The text
As transmitted.
959
WGUS55 KSLC 101944
FFWSLC
UTC025-053-102345-
/O.NEW.KSLC.FF.W.0016.160810T1940Z-160810T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
140 PM MDT WED AUG 10 2016
THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A
* FLASH FLOOD WARNING FOR...
WEST CENTRAL KANE COUNTY IN UTAH...
EAST CENTRAL WASHINGTON COUNTY IN UTAH...
* UNTIL 545 PM MDT
* AT 140 PM MDT...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING
HEAVY RAIN OVER DRAINAGES IN THE SOUTH END OF ZION NATIONAL PARK.
AREAS INCLUDES THE NORTH FORK OF THE VIRGIN RIVER IN ADDITION TO
MANY SLOTS THAT FLOW INTO THIS DRAINAGE. FLASH FLOODING IS
EXPECTED TO BEGIN SHORTLY.
* RADAR RAINFALL ESTIMATES INDICATE THAT AROUND AN INCH OF RAINFALL
HAS OCCURRED IN AREAS JUST SOUTHWEST OF ROCKVILLE...AND THESE
STORMS ARE MOVING THROUGH ZION AS OF 145PM.
* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
ZION NATIONAL PARK...SPRINGDALE AND ROCKVILLE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU ARE IN THE PARK NEAR ANY OF THESE DRAINAGES...PLEASE USE
PRUDENT JUDGEMENT IF YOU PLAN ON HIKING OR CANYONEERING.
&&
LAT...LON 3733 11286 3717 11286 3708 11301 3714 11313
3732 11303
$$
MCINERNEY1 follow-up statement
602
WGUS75 KSLC 102312
FFSSLC
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
505 PM MDT WED AUG 10 2016
UTC025-053-102345-
/O.CON.KSLC.FF.W.0016.000000T0000Z-160810T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KANE UT-WASHINGTON UT-
505 PM MDT WED AUG 10 2016
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 545 PM MDT FOR
WEST CENTRAL KANE AND EAST CENTRAL WASHINGTON COUNTIES...
AT 505 PM MDT...FLASH FLOODING ACROSS ZION NATIONAL PARK HAD CLOSED
SR 9 THAT RUNS THROUGH THE PARK...IN ADDITION TO THE TOWN OF
SPRINGDALE. FLOOD WATERS...ROCKS...AND DEBRIS HAD CLOSED THE ROAD
FOR A PERIOD OF TIME.
ADDITIONALLY...THE NORTH FORK OF THE VIRGIN RIVER WHICH RUNS FROM
THE NORTH END OF ZION AND FLOWS OUT THE SOUTHERN BORDER ROSE FROM 40
CUBIC FEET PER SECOND (CFS) TO 1800 CFS IN A SHORT PERIOD OF TIME.
THE EAST FORK OF THE VIRGIN RIVER ROSE FROM 50 CFS TO 1200 CFS
ALSO IN UNDER AN HOUR.
ADDITIONAL THUNDERSTORMS ARE NOW MOVING THROUGH THE PARK AND WHILE
THESE WATERWAYS ARE RECEDING...FLOODING IS EXPECTED TO BE
EXACERBATED.
SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
ZION NATIONAL PARK...SPRINGDALE AND ROCKVILLE.
LAT...LON 3733 11286 3717 11286 3708 11301 3714 11313
3732 11303
$$
MCINERNEYThe office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 10, 3:15 AM MDT | Red Flag Warning | SLC | Box Elder, Cache, Davis, Juab, Millard, Morgan and 8 more | 24 hr |
| Aug 10, 12:33 PM MDT | Special Weather Statement | SLC | 27 min | |
| Aug 10, 1:13 PM MDT | Special Weather Statement | SLC | Washington | 47 min |
| Aug 10, 1:38 PM MDT | Special Weather Statement | SLC | Duchesne | 37 min |
| Aug 10, 1:45 PM MDT | Severe Thunderstorm Warning | SLC | Kane, Washington | 30 min |
| Aug 10, 2:17 PM MDT | Severe Thunderstorm Warning | SLC | Kane | 28 min |
| Aug 10, 2:21 PM MDT | Flash Flood Warning | SLC | Garfield, Kane | 4 hr |
| Aug 10, 3:07 PM MDT | Severe Thunderstorm Warning | SLC | Washington | 23 min |
| Aug 10, 3:11 PM MDT | Special Weather Statement | SLC | Salt Lake | 34 min |
| Aug 10, 4:05 PM MDT | Severe Thunderstorm Warning | SLC | Washington | 25 min |
| Aug 10, 4:37 PM MDT | Severe Thunderstorm Warning | SLC | Washington | 23 min |
| Aug 10, 5:39 PM MDT | Flash Flood Warning | SLC | Kane, Washington | 2 hr |
Nearby
Flash Flood Warnings in Utah, 2016Every flash flood warning in 2016
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.