Alert archive / Utah / Hard Freeze Watches in 2021
Hard Freeze Watch 2, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this hard freeze watch at Sep 19, 2021, 2:59 AM MDT for 13 counties in Utah. It took effect at Sep 21, 2021, 12:00 AM MDT. It was in force for .
The area
The counties it named.
The facts
- Issued
- Sep 19, 2021, 2:59 AM MDT (08:59 UTC)
- In effect from
- Sep 21, 2021, 12:00 AM MDT
- Expired
- Sep 20, 2021, 9:36 AM MDT
- In force
- Issued by
- NWS Salt Lake City, UT
Counties Beaver County, UT, Cache County, UT, Garfield County, UT, Iron County, UT, Morgan County, UT, Piute County, UT, Rich County, UT, Sanpete County, UT, Sevier County, UT, Summit County, UT, Wasatch County, UT, Washington County, UT, Weber County, UT
The radar
The Salt Lake City radar (KMTX), 190 km from the middle of the area, began a volume at 09:02 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 00:00Z, 9.0 hours before the alert went out and 303 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
- 75 J/kg
- Mixed-layer CIN
- -202 J/kg
- Mixed-layer LCL
- 2776 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 73 m²/s²
- 0-3 km storm-relative helicity
- 161 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this hard freeze watch 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 hard freeze watch went out at Sep 18, 4:09 PM MDT, 10 hours 50 minutes earlier.
Area forecast discussion, Sep 18, 4:09 PM MDT, 10 hours 50 minutes before
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</html>The office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 19, 2:59 AM MDT | Wind Advisory | SLC | Utah | 17 hr |
Nearby
Hard Freeze Watches in Utah, 2021Every hard freeze watch in 2021
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.