Alert archive / Idaho / Freeze Watches in 2021
Freeze Watch 1, NWS Pocatello, ID
NWS Pocatello, ID issued this freeze watch at May 8, 2021, 3:26 AM MDT for 12 counties in Idaho. It took effect at May 9, 2021, 3:00 AM MDT. It was in force for .
The area
The counties it named.
The facts
- Issued
- May 8, 2021, 3:26 AM MDT (09:26 UTC)
- In effect from
- May 9, 2021, 3:00 AM MDT
- Expired
- May 8, 2021, 1:34 PM MDT
- In force
- Issued by
- NWS Pocatello, ID
Counties Bannock County, ID, Bingham County, ID, Blaine County, ID, Bonneville County, ID, Butte County, ID, Cassia County, ID, Fremont County, ID, Jefferson County, ID, Lincoln County, ID, Madison County, ID, Minidoka County, ID, Power County, ID
The radar
The Pocatello radar (KSFX), 18 km from the middle of the area, began a volume at 09:26 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
Salt Lake City I, UT (KSLC), launched 00:00Z, 9.4 hours before the alert went out and 284 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
- 146 J/kg
- Mixed-layer CIN
- -147 J/kg
- Mixed-layer LCL
- 3081 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- -54 m²/s²
- 0-3 km storm-relative helicity
- 64 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.1
What forecasters said that day
The local office's own words before this freeze watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Pocatello, ID wrote its last area forecast discussion before this freeze watch went out at May 7, 8:45 PM MDT, 6 hours 41 minutes earlier.
Area forecast discussion, May 7, 8:45 PM MDT, 6 hours 41 minutes before
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</html>The office that day
Everything else NWS Pocatello, ID issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 7, 6:23 PM MDT | Special Weather Statement | PIH | Bear Lake | 82 min |
| May 8, 3:26 AM MDT | Wind Advisory | PIH | Bannock, Bingham, Blaine, Cassia, Minidoka, Power | 10 hr |
| May 8, 1:34 PM MDT | Frost Advisory | PIH | Bannock, Bingham, Blaine, Cassia, Minidoka, Power | 19 hr |
| May 8, 1:34 PM MDT | Freeze Warning | PIH | Bannock, Bingham, Blaine, Bonneville, Butte, Fremont and 5 more | 19 hr |
Nearby
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.