Utah, 2001

Flash Flood in Utah, July 10, 2001

July 10, 2001 · NWS SLC · 1 event in 1 county or zone

1 flash flood, as filed by the National Weather Service.

Where it happened

Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.

  • Tornadoes
  • Tropical storms and surge
  • Floods
  • Wind
  • Hail
  • Winter weather
  • Heat and drought
  • Cold
  • Fire, smoke and dust
  • Marine and coastal
  • Other

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The toll

Deaths
0
Injuries
0
Property damage
$5,000
Crop damage
$1,000
Events
1

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What forecasters said that day

The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Salt Lake City, UT wrote its last area forecast discussion before the first event at Jul 10, 1:45 PM MST, 2 hours 50 minutes earlier.

Area forecast discussion, Jul 10, 1:45 PM MST, 2 hours 50 minutes before
UTAH AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
245 PM MDT TUE JUL 10 2001

  CORRECTION FOR CODED PROBABILITIY OF PRECIPITATION

SYNOPSIS...THE VERY MOIST AIR MASS OVER UTAH TONIGHT WILL BEGIN
DRYING SLOWLY WEDNESDAY AND THURSDAY.

DISCUSSION...CONVECTION STARTED POPPING EARLY TODAY AND EXPECT
FAIRLY WIDESPREAD ACTIVITY TO CONTINUE THROUGH THE EVENING.  INITIAL
ACTIVITY IN SOUTHERN UT SHOWED VERY LITTLE MOVEMENT WHICH WAS THE
FINAL KEY IN ISSUING A FLASH FLOOD WATCH FOR ABOUT THE SOUTHERN HALF
OF OUR AREA.  THOSE IN THE NORTH ARE GENERALLY MOVING A BIT BUT
LOCALLY HEAVY RAIN IS STILL LIKELY THROUGH THE EARLY EVENING HOURS.
BIGGEST QUESTION FOR THE EVENING IS THE CHANCE WE WILL GET TO CLOUDY
TO KEEP THE STRONGER ACTIVITY GOING.  FOR NOW NO CHANGES PLANNED FOR
THE EVENING PERIOD.

THERE SHOULD BE A LITTLE DRYING FOR TOMORROW...MAINLY OVER THE
SOUTHWEST AND NORTHEAST.  EVEN THERE IT WILL REMAIN MOIST ENOUGH FOR
SCATTERED CONVECTION BUT THE RISK OF HEAVY RAINS WILL BE REDUCED.
THEN THE AVN IS BRINGING ANOTHER SURGE OF MOISTURE NORTH INTO THE
AREA THURSDAY ASSOCIATED WITH ANOTHER SHORTWAVE THAT APPEARS TO
EVOLVE FROM AN EASTERLY WAVE.  THE CURRENT TRACK ON THIS IS MORE FOR
THE MOUNTAINS AND EASTERN HALF OF THE AREA BUT IT DOES HAVE JUST
ENOUGH OF A NORTHWEST DIRECTION THAT IT WILL SPREAD SOME MOISTURE
BACK INTO NORTHWEST UT AFTER MOSTLY MISSING THE SOUTHWEST.  THE
SHORTWAVE ITSELF DOESNT GET TO THE NORTH UNTIL LATE THU NIGHT WHICH
IS BEYOND THE CURRENT SHORT RANGE FORECAST.  NOT CONFIDENT ENOUGH IN
THE EXISTENCE OR TRACK OF THE IMPULSE TO PUT A GHOST PERIOD IN SO WE
WILL WAIT AND DEAL WITH THIS FEATURE IN A LATER PACKAGE IF THE
MODELS CONTINUE TO SHOW IT.

THE TREND IN THE EXTENDED WILL BE FOR FAIRLY RAPID DRYING IN
SOUTHWEST FLOW AS AN UPPER LEVEL LOW SETTLES INTO THE PACIFIC
NORTHWEST.  THAT WILL ALSO KEEP OUT TEMPERATURES FROM SKYROCKETING
BUT IT WILL STILL BE SLIGHTLY ABOVE NORMAL FOR MOST OF THE PERIOD.
THERE IS A COLD FRONT INDICATED IN THE MODELS OVER SOUTHERN ID BY
MONDAY AFTERNOON BUT IT MAKES VERY LITTLE PROGRESS SOUTHWARD UNTIL
ABOUT TUESDAY EVENING. SO IT DOESNT LOOK LIKE IT WILL PROVIDE ANY
COOLING DURING THIS PERIOD.

SLC 6442 CDC 6332 SANDERS

.SLC...FLASH FLOOD WATCH SOUTHERN UT UNTIL 04Z THIS EVENING.

The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

1 flash flood. Local standard time, as filed.

Flash Flood, Salt Lake

When
July 10, 4:35 PM MST to 5:00 PM MST
Where
Salt Lake County, Herriman
Property damage
$5,000
Crop damage
$1,000
Reported by
GENERAL PUBLIC
Coordinates
40.668, -111.924 (the zone’s center; the record gives no point)

Heavy rains in Herriman produced flash flooding, washing out several gravel driveways in the process.

What these are

Flash Flood
Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Utah in 2001Every state in 2001This day in weather historyWarnings in Utah, July 2001

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 5275522.