Alert archive / Utah / Flash Flood Warnings in 2016

Flash Flood Warning 1, NWS Salt Lake City, UT

June 30, 2016Kane County, Washington County, Utah

NWS Salt Lake City, UT issued this flash flood warning at Jun 30, 2016, 5:42 PM MDT for Kane County, Washington County, Utah. It was in force for 3 hr. 2 reports 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
Jun 30, 2016, 5:42 PM MDT (23:42 UTC)
Expired
Jun 30, 2016, 8:45 PM MDT
In force
3 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), 42 km from the middle of the area, began a volume at 23:45 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.

What was reported inside it

TimeReportWhereRemark
Jun 30, 6:15 PM MDTFLASH FLOOD3 Ese Springdale, UTTHE EAST FORK OF THE VIRGIN RIVER INCREASED FROM 43 CFS TO 1880 CFS IN 15 MINUTES.
Jun 30, 6:55 PM MDTFLASH FLOOD4 E Springdale, UTZION NATIONAL PARK RANGERS REPORT HEAVY FLOODING ON CLEAR CREEK, MANY WATERFALLS NEAR TWIN BROTHERS, AND FLASH FLOODING IN MOST SLOT CANYONS IN THE SOUTHEAST PORTION OF THE PARK.

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, 11.7 hours before the alert went out and 243 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.

Skew-T log-pSkew-T log-p diagram, Flgstf/Belemont, AZ at 12:00Z on 2016-06-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 83 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Flgstf/Belemont, AZ at 12:00Z on 2016-06-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 79 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
83 J/kg
Mixed-layer CIN
-81 J/kg
Mixed-layer LCL
1378 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
79 m²/s²
0-3 km storm-relative helicity
56 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

549 
WGUS55 KSLC 302342
FFWSLC
UTC025-053-010245-
/O.NEW.KSLC.FF.W.0001.160630T2342Z-160701T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
542 PM MDT THU JUN 30 2016

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WESTERN KANE COUNTY IN UTAH...
  EAST CENTRAL WASHINGTON COUNTY IN UTAH...

* UNTIL 845 PM MDT
    
* AT 539 PM MDT...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING
  HEAVY RAIN OVER THE SOUTHEASTERN QUADRANT OF ZION NATIONAL PARK.
  RADAR ESTIMATES INDICATE THAT UP TO TWO INCHES OF RAIN HAVE
  ALREADY FALLEN.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... CLEAR
  CREEK...PINE CREEK...THE EAST FORK OF THE VIRGIN RIVER...AND
  ECHO CANYON IN ZION NATIONAL PARK. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.

&&

LAT...LON 3730 11290 3728 11288 3723 11285 3717 11285
      3717 11290 3716 11292 3715 11298 3716 11302
      3728 11295

$$

LC
2 follow-up statements
267 
WGUS75 KSLC 010050
FFSSLC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
650 PM MDT THU JUN 30 2016

UTC025-053-010245-
/O.CON.KSLC.FF.W.0001.000000T0000Z-160701T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KANE UT-WASHINGTON UT-
650 PM MDT THU JUN 30 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 845 PM MDT FOR
WESTERN KANE AND EAST CENTRAL WASHINGTON COUNTIES...

AT 644 PM MDT...DOPPLER RADAR INDICATED THAT UP TO TWO INCHES OF
RAIN HAVE ALREADY FALLEN ACROSS THE SOUTHEASTERN QUADRANT OF ZION
NATIONAL PARK. FLASH FLOODING HAS ALREADY BEEN REPORTED IN THE EAST
FORK OF THE VIRGIN RIVER WHERE THE RIVER GAGE INDICATES FLOWS OF
1880 CFS.

OTHER LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...CLEAR
CREEK...PINE CREEK AND ECHO CANYON IN ZION NATIONAL PARK. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.

&&

LAT...LON 3730 11290 3728 11288 3723 11285 3717 11285
      3717 11290 3716 11292 3715 11298 3716 11302
      3728 11295

$$

LC
223 
WGUS75 KSLC 010245
FFSSLC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
845 PM MDT THU JUN 30 2016

UTC025-053-010250-
/O.EXP.KSLC.FF.W.0001.000000T0000Z-160701T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KANE UT-WASHINGTON UT-
845 PM MDT THU JUN 30 2016

...THE FLASH FLOOD WARNING FOR WESTERN KANE AND EAST CENTRAL
WASHINGTON COUNTIES WILL EXPIRE AT 845 PM MDT...

PRECIPITATION HAS DECREASED IN INTENSITY OVER ZION NATIONAL PARK AND
RUNOFF FROM EARLIER PRECIPITATION HAS DIMINISHED. THEREFORE...THE
FLASH FLOOD WARNING HAS BEEN ALLOWED TO EXPIRE. HOWEVER...ELEVATED
FLOWS WILL CONTINUE ALONG SOME STREAMS IN THE AREA THROUGH LATE THIS
EVENING. MONITOR NOAA WEATHER RADIO OR LOCAL TELEVISION OR RADIO FOR
THE LATEST WEATHER INFORMATION.

LAT...LON 3730 11290 3728 11288 3723 11285 3717 11285
      3717 11290 3716 11292 3715 11298 3716 11302
      3728 11295

$$

LC

The office that day

Everything else NWS Salt Lake City, UT issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 29, 6:04 PM MDTSpecial Weather StatementSLCSalt Lake26 min
Jun 29, 6:40 PM MDTSpecial Weather StatementSLCSalt Lake20 min
Jun 30, 2:47 PM MDTFlash Flood WatchSLC30 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.