Alert archive / Utah / Flash Flood Warnings in 2022

Flash Flood Warning 114, NWS Salt Lake City, UT

September 30, 2022Emery County, Utah

NWS Salt Lake City, UT issued this flash flood warning at Sep 30, 2022, 5:19 PM MDT for Emery County, Utah. It was in force for 116 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Sep 30, 2022, 5:19 PM MDT (23:19 UTC)
Expired: Sep 30, 2022, 7:15 PM MDT
In force: 116 min
Issued by: NWS Salt Lake City, UT
Area: Storm-based polygon
Damage threat: Considerable
Flood severity: None

County Emery County, UT

The radar

The Grand Junction radar (KGJX), 215 km from the middle of the area, began a volume at 23:20 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

Grand Junction, CO (KGJT), launched 12:00Z, 11.3 hours before the alert went out and 191 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: 11 J/kg
Mixed-layer CIN: -167 J/kg
Mixed-layer LCL: 1764 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 99 m²/s²
0-3 km storm-relative helicity: 254 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood warning went out, 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 this flash flood warning went out at Sep 30, 3:57 PM MDT, 1 hour 22 minutes earlier.

Area forecast discussion, Sep 30, 3:57 PM MDT, 1 hour 22 minutes before

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In the hours before

Special weather statement, Sep 30, 1:03 PM MDT, 4 hours 16 minutes before

Special Weather Statement
National Weather Service Salt Lake City UT
103 PM MDT Fri Sep 30 2022

UTZ125-129-130-301930-
Capitol Reef National Park and Vicinity UT-Western Canyonlands UT-
Southern Mountains UT-
103 PM MDT Fri Sep 30 2022

...A strong thunderstorm will impact portions of northeastern
Garfield and south central Wayne Counties through 130 PM MDT...

At 103 PM MDT, Doppler radar was tracking a strong thunderstorm 9
miles east of Capitol Reef National Park, moving east at 15 mph.

HAZARD...Wind gusts up to 50 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

This storm will remain over mainly rural areas of northeastern
Garfield and south central Wayne Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3805 11108 3811 11110 3817 11108 3829 11080
      3805 11071
TIME...MOT...LOC 1903Z 256DEG 12KT 3812 11101

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...50 MPH

STW

Special weather statement, Sep 30, 1:10 PM MDT, 4 hours 9 minutes before

Special Weather Statement
National Weather Service Salt Lake City UT
110 PM MDT Fri Sep 30 2022

UTZ125-128-302000-
South Central Utah UT-Southern Mountains UT-
110 PM MDT Fri Sep 30 2022

...A strong thunderstorm will impact portions of central Garfield
County through 200 PM MDT...

At 109 PM MDT, Doppler radar was tracking a strong thunderstorm near
Escalante, moving east at 25 mph.

HAZARD...Wind gusts up to 50 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Escalante and Boulder.

This includes Utah Route 12 between mile markers 61 and 62, and
between mile markers 67 and 88.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 3774 11159 3789 11159 3800 11114 3797 11113
      3774 11113
TIME...MOT...LOC 1909Z 264DEG 21KT 3782 11150

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH

STW

Special weather statement, Sep 30, 1:47 PM MDT, 3 hours 32 minutes before

Special Weather Statement
National Weather Service Salt Lake City UT
147 PM MDT Fri Sep 30 2022

UTZ130-302030-
Western Canyonlands UT-
147 PM MDT Fri Sep 30 2022

...A strong thunderstorm will impact portions of southeastern Wayne
County through 230 PM MDT...

At 147 PM MDT, Doppler radar was tracking a strong thunderstorm 19
miles east of Hanksville, moving east at 20 mph.

HAZARD...Wind gusts up to 50 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

This storm will remain over mainly rural areas of southeastern Wayne
County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3818 11046 3838 11047 3841 11002 3838 11003
      3838 10998 3835 10997 3835 10995 3832 10997
      3824 10992 3823 10988 3822 10992 3819 10989
      3818 10989
TIME...MOT...LOC 1947Z 266DEG 18KT 3828 11038

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH

STW

Special weather statement, Sep 30, 1:50 PM MDT, 3 hours 29 minutes before

Special Weather Statement
National Weather Service Salt Lake City UT
150 PM MDT Fri Sep 30 2022

UTZ125-130-131-302030-
Western Canyonlands UT-Southern Mountains UT-
Glen Canyon Recreation Area/Lake Powell UT-
150 PM MDT Fri Sep 30 2022

...A strong thunderstorm will impact portions of northeastern
Garfield and northern San Juan Counties through 230 PM MDT...

At 150 PM MDT, Doppler radar was tracking a strong thunderstorm 18
miles west of Hite Marina, or 27 miles south of Hanksville, moving
east at 25 mph.

HAZARD...Wind gusts up to 50 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Hite Marina.

This includes the following highways...
 Utah Route 95 between mile markers 22 and 39, and between mile
markers 43 and 47.
 Utah Route 276 between mile markers 0 and 9.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3789 11083 3805 11083 3814 11020 3789 11020
TIME...MOT...LOC 1950Z 263DEG 24KT 3798 11071

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH

STW

Special weather statement, Sep 30, 2:41 PM MDT, 2 hours 38 minutes before

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Special weather statement, Sep 30, 5:03 PM MDT, 16 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 30, 11:49 AM MDT	Special Weather Statement	SLC	Emery	26 min
Sep 30, 12:04 PM MDT	Special Weather Statement	SLC	Carbon	26 min
Sep 30, 12:21 PM MDT	Flash Flood Warning Considerable damage threat	SLC	Emery	3 hr
Sep 30, 12:23 PM MDT	Special Weather Statement	SLC	Emery	52 min
Sep 30, 12:36 PM MDT	Special Weather Statement	SLC	Carbon	39 min
Sep 30, 1:03 PM MDT	Special Weather Statement	SLC	Wayne	27 min
Sep 30, 1:10 PM MDT	Special Weather Statement	SLC	Garfield	50 min
Sep 30, 1:26 PM MDT	Severe Thunderstorm Warning	SLC	Garfield, Wayne	17 min
Sep 30, 1:47 PM MDT	Special Weather Statement	SLC		43 min
Sep 30, 1:50 PM MDT	Special Weather Statement	SLC	Wayne	40 min
Sep 30, 1:52 PM MDT	Flash Flood Warning Considerable damage threat	SLC	Wayne	3 hr
Sep 30, 2:07 PM MDT	Flash Flood Warning Considerable damage threat	SLC	Wayne	3 hr
Sep 30, 2:41 PM MDT	Special Weather Statement	SLC		34 min
Sep 30, 4:45 PM MDT	Flash Flood Warning Considerable damage threat	SLC	Wayne	3 hr
Sep 30, 5:03 PM MDT	Special Weather Statement	SLC	Emery	27 min
Sep 30, 5:25 PM MDT	Special Weather Statement	SLC	Iron	35 min
Sep 30, 5:34 PM MDT	Special Weather Statement	SLC	Emery	26 min

Nearby

Flash Flood Warnings in Utah, 2022 Every flash flood warning in 2022

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.