Alert archive / Utah / Flash Flood Warnings in 2007

Flash Flood Warning 2, NWS Salt Lake City, UT

September 22, 2007Kane County, Utah

NWS Salt Lake City, UT issued this flash flood warning at Sep 22, 2007, 12:28 PM MDT for Kane County, Utah. It was in force for 6 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 22, 2007, 12:28 PM MDT (18:28 UTC)
Expired: Sep 22, 2007, 6:30 PM MDT
In force: 6 hr
Issued by: NWS Salt Lake City, UT
Area: Counties, with a storm outline in the text
Flood severity: None

County Kane County, UT

The radar

The Cedar City radar (KICX), 31 km from the middle of the area, began a volume at 18:30 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, 6.5 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1191 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 161 m²/s²
0-3 km storm-relative helicity: 252 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WGUS55 KSLC 221833
FFWSLC
UTC025-230030-
/X.NEW.KSLC.FF.W.0002.070922T1828Z-070923T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1228 PM MDT SAT SEP 22 2007

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WESTERN KANE COUNTY IN UTAH...

* UNTIL 630 PM MDT

* AT 1225 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
  WIDESPREAD MODERATE TO HEAVY RAIN OCCURRING ACROSS WESTERN KANE 
  COUNTY. ADDITIONAL RAINFALL WILL CONTINUE TO MOVE NORTHWARD OUT OF 
  ARIZONA...AND ACROSS THE WARNED AREA THROUGH THE EARLY AFTERNOON 
  HOURS...WITH AN ADDITIONAL ONE HALF TO THREE QUARTERS OF AN INCH 
  POSSIBLE. 

* THIS HEAVY RAINFALL WILL RESULT IN RAPID RISES THROUGH MOST SLOT 
  CANYONS...DRY WASHES...SMALL STREAMS...AND OTHER FLASH FLOOD 
  PRONE AREAS WITHIN WESTERN KANE COUNTY...INCLUDING CLEAR 
  CREEK...MUDDY CREEK AND MEADOW CREEK. FLOWS THROUGH THE NORTH FORK 
  OF THE VIRGIN...AS WELL AS THE VIRGIN RIVER ARE EXPECTED TO 
  RAPIDLY INCREASE AS WELL. ADDITIONAL LOCATIONS IN THE WARNING 
  INCLUDE BUT ARE NOT LIMITED TO ORDERVILLE...MT CARMEL...GLENDALE 
  AND ALTON

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.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.

LAT...LON 3753 11290 3753 11244 3709 11249 3700 11290
TIME...MOT...LOC 1828Z 180DEG 0KT 3722 11268

$$

SEAMAN

3 follow-up statements

000 
WGUS75 KSLC 221955
FFSSLC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
151 PM MDT SAT SEP 22 2007

UTC025-230030-
/X.CON.KSLC.FF.W.0002.000000T0000Z-070923T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KANE UT-
151 PM MDT SAT SEP 22 2007

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 630 PM MDT FOR
WESTERN KANE COUNTY...

AT 147 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE MODERATE TO HEAVY RAINFALL ACROSS WESTERN KANE COUNTY. 
RADAR ESTIMATES INDICATE ONE TO ONE AND A HALF INCHES HAS 
FALLEN...WITH AN ADDITIONAL ONE QUARTER TO ONE HALF INCH CAN BE 
EXPECTED THROUGH 3 PM...WITH LOCALLY HIGHER AMOUNTS POSSIBLE. 

THIS HEAVY RAINFALL WILL RESULT IN RAPID RISES THROUGH MOST SLOT   
CANYONS...DRY WASHES...SMALL STREAMS...AND OTHER FLASH FLOOD PRONE 
AREAS WITHIN WESTERN KANE COUNTY...INCLUDING CLEAR CREEK...MUDDY 
CREEK AND MEADOW CREEK. FLOWS THROUGH THE NORTH FORK OF THE VIRGIN 
RIVER...AS WELL AS THE MAIN VIRGIN RIVER CHANNEL ARE EXPECTED TO 
RAPIDLY INCREASE AS WELL. ADDITIONAL LOCATIONS IN THE WARNING   
INCLUDE BUT ARE NOT LIMITED TO ORDERVILLE...MT CARMEL...GLENDALE   
AND ALTON

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 3753 11290 3753 11244 3709 11249 3700 11290
TIME...MOT...LOC 1951Z 180DEG 0KT 3722 11268

$$

SEAMAN

000 
WGUS75 KSLC 222212
FFSSLC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
404 PM MDT SAT SEP 22 2007

UTC025-230030-
/X.CON.KSLC.FF.W.0002.000000T0000Z-070923T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KANE UT-
404 PM MDT SAT SEP 22 2007

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 630 PM MDT FOR
WESTERN KANE COUNTY...

AT 400 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR ESTIMATED ONE 
AND ONE HALF TO TWO INCHES OF RAINFALL HAD FALLEN ACROSS WESTERN 
KANE COUNTY SINCE LATE THIS MORNING. OCCASIONAL SHOWERS AND 
THUNDERSTORMS WILL CONTINUE TO MOVE ACROSS THE AREA THROUGH 7 PM 
THIS EVENING. ALTHOUGH THE THREAT FOR WIDESPREAD HEAVY RAINFALL HAS 
DIMINISHED...LOCALLY HEAVY RAINFALL WILL REMAIN POSSIBLE WITH THESE 
STORMS AS THEY CONTINUE ACROSS THE AREA. ADDITIONALLY...RUNOFF FROM 
EARLIER RAINFALL WILL CONTINUE TO RESULT IN HIGH FLOWS THROUGH SLOT 
CANYONS AND NORMALLY DRY WASHES. 

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ORDERVILLE...
MT CARMEL...GLENDALE AND ALTON

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 3753 11290 3753 11244 3709 11249 3700 11290
TIME...MOT...LOC 2204Z 180DEG 0KT 3722 11268

$$

SEAMAN

000 
WGUS75 KSLC 230031
FFSSLC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
628 PM MDT SAT SEP 22 2007

UTC025-230038-
/X.EXP.KSLC.FF.W.0002.000000T0000Z-070923T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KANE UT-
628 PM MDT SAT SEP 22 2007

...THE FLASH FLOOD WARNING WILL EXPIRE AT 630 PM MDT FOR WESTERN KANE
COUNTY...

WIDESPREAD SIGNIFICANT RAIN HAS OCCURRED IN THE DRAINAGES
OF WESTERN KANE COUNTY DURING THE PAST 6 HOURS. SHOWERS AND ISOLATED 
THUNDERSTORMS CONTINUE ACROSS THE WARNING AREA BUT ARE MOVING SLOWLY 
TO THE EAST. SIGNIFICANT RUNOFF WILL CONTINUE IN THE DRAINAGES OF 
WESTERN KANE COUNTY BUT THE THREAT FOR FLASH FLOODING HAS DECREASED.
DRY WASHES WILL HAVE SIGNIFICANT RUNNING WATER WELL INTO THE EVENING.

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 3753 11290 3753 11244 3709 11249 3700 11290
TIME...MOT...LOC 0028Z 180DEG 0KT 3722 11268

$$

TARDY

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 22, 10:51 AM MDT	Flash Flood Warning	SLC	Iron, Washington	6 hr

Nearby

Flash Flood Warnings in Utah, 2007 Every flash flood warning in 2007

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.