Alert archive / Utah / Flash Flood Warnings in 2012
Flash Flood Warning 27, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Jul 29, 2012, 3:52 PM MDT for Kane County, Washington 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
- Jul 29, 2012, 3:52 PM MDT (21:52 UTC)
- Expired
- Jul 29, 2012, 7:45 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), 27 km from the middle of the area, began a volume at 21:53 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
Las Vegas, NV (KVEF), launched 12:00Z, 9.9 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 7785 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 7 m²/s²
- 0-3 km storm-relative helicity
- -18 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
032
WGUS55 KSLC 292152
FFWSLC
UTC025-053-300145-
/O.NEW.KSLC.FF.W.0027.120729T2152Z-120730T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
352 PM MDT SUN JUL 29 2012
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 745 PM MDT
* AT 344 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
HEAVY RAIN FROM A THUNDERSTORM OVER THE WARNED AREA INCLUDING ZION
NATIONAL PARK.
* HEAVY RAIN IS FALLING IN THE NORTH CREEK DRAINAGE ON THE WEST SIDE
OF THE PARK INCLUDING THE SUBWAY AND THE CLEAR CREEK DRAINAGE ON THE
EAST SIDE OF THE PARK. HEAVY RAIN HAS ALSO BEEN FALLING ON THE UPPER
REACHES OF THE NORTH FORK OF THE VIRGIN RIVER DRAINAGE.
RADAR ESTIMATES OF ONE HALF TO ONE INCH OF RAIN HAS ALREADY FALLEN
IN THESE AREAS AND FLASH FLOODING IS LIKELY ON MANY DRAINAGES IN THE
PARK.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
AVOID DRY WASHES AND SLOT CANYONS IN THIS AREA. IF FLASH FLOODING IS
OBSERVED...QUICKLY SEEK HIGHER GROUND.
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.
&&
LAT...LON 3748 11304 3749 11302 3750 11290 3738 11266
3714 11284 3714 11299 3721 11317 3747 11322
$$
PW2 follow-up statements
027
WGUS75 KSLC 292357
FFSSLC
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
557 PM MDT SUN JUL 29 2012
UTC025-053-300145-
/O.CON.KSLC.FF.W.0027.000000T0000Z-120730T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WASHINGTON UT-KANE UT-
557 PM MDT SUN JUL 29 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 745 PM MDT FOR WEST
CENTRAL KANE AND EAST CENTRAL WASHINGTON COUNTIES INCLUDING ZION
NATIONAL PARK...
AT 550 PM MDT...HEAVY RAINFALL HAD PRETTY MUCH ENDED ACROSS THIS
AREA. ZION NATIONAL PARK RANGERS REPORTED HEAVY RAIN HAD FALLEN IN
THE NORTH CREEK DRAINAGE BUT NO FLASH FLOODING HAD YET BEEN
OBSERVED.
HEAVY RUNOFF FROM THE EARLIER RAIN MAY STILL BE WORKING ITS WAY DOWN
THE STREAM CHANNELS IN AND AROUND THE PARK AND SUDDEN RISES ARE
STILL POSSIBLE. HOWEVER...THE THREAT OF ADDITIONAL HEAVY RAIN AND
NEW FLASH FLOODING IS LOW.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.
&&
LAT...LON 3748 11304 3749 11302 3750 11290 3738 11266
3714 11284 3714 11299 3721 11317 3747 11322
$$
PW859
WGUS75 KSLC 300142
FFSSLC
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
742 PM MDT SUN JUL 29 2012
UTC025-053-300146-
/O.EXP.KSLC.FF.W.0027.000000T0000Z-120730T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WASHINGTON UT-KANE UT-
742 PM MDT SUN JUL 29 2012
...THE FLASH FLOOD WARNING WILL EXPIRE AT 745 PM MDT FOR WEST CENTRAL
KANE AND EAST CENTRAL WASHINGTON COUNTIES...
LITTLE ADDITIONAL RAINFALL HAS OCCURRED ACROSS ZION NATIONAL PARK
AND RUNOFF FROM EARLIER PRECIPITATION SHOULD HAVE WORKED ITS WAY
THROUGH MOST OF THE STREAM CHANNELS. THEREFORE...THE FLASH FLOOD
WARNING HAS BEEN ALLOWED TO EXPIRE.
IT IS STILL POSSIBLE THAT SOME OF THE LARGER STREAM CHANNELS COULD
STILL EXPERIENCE MODEST RISES THROUGH THE FIRST PART OF THE NIGHT.
CAMPERS AND HIKERS ARE ADVISED TO AVOID STREAM CHANNELS AND WASHES
TONIGHT.
MONITOR NOAA WEATHER RADIO OR LOCAL
TELEVISION OR RADIO FOR THE LATEST WEATHER INFORMATION.
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.
LAT...LON 3748 11304 3749 11302 3750 11290 3738 11266
3714 11284 3714 11299 3721 11317 3747 11322
$$
PWNearby
Flash Flood Warnings in Utah, 2012Every flash flood warning in 2012
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.