Alert archive / Wisconsin / Frost Advisories in 2021
Frost Advisory 9, NWS La Crosse, WI
NWS La Crosse, WI issued this frost advisory at Sep 22, 2021, 2:07 PM CDT for 6 counties in Wisconsin. It took effect at Sep 23, 2021, 1:00 AM CDT. It was in force for 7 hr.
The area
The counties it named.
The facts
- Issued
- Sep 22, 2021, 2:07 PM CDT (19:07 UTC)
- In effect from
- Sep 23, 2021, 1:00 AM CDT
- Expired
- Sep 23, 2021, 8:00 AM CDT
- In force
- 7 hr
- Issued by
- NWS La Crosse, WI
Counties Adams County, WI, Clark County, WI, Jackson County, WI, Juneau County, WI, Monroe County, WI, Taylor County, WI
The radar
The La Crosse radar (KARX), 86 km from the middle of the area, began a volume at 19:05 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
Green Bay/Straub, WI (KGRB), launched 12:00Z, 7.1 hours before the alert went out and 184 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 911 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- -144 m²/s²
- 0-3 km storm-relative helicity
- -109 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
398 WWUS73 KARX 221907 NPWARX URGENT - WEATHER MESSAGE National Weather Service La Crosse WI 207 PM CDT Wed Sep 22 2021 WIZ017-029-034-042>044-231300- /O.NEW.KARX.FR.Y.0009.210923T0600Z-210923T1300Z/ Taylor-Clark-Jackson-Monroe-Juneau-Adams- Including the cities of Medford, Neillsville, Black River Falls, Sparta, Tomah, Mauston, and Friendship 207 PM CDT Wed Sep 22 2021 ...FROST ADVISORY IN EFFECT FROM 1 AM TO 8 AM CDT THURSDAY... * WHAT...Temperatures dipping in the low to mid 30s will result in frost formation. * WHERE...Taylor, Clark, Jackson, Monroe, Juneau and Adams counties. * WHEN...From 1 AM to 8 AM CDT Thursday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ Kurz
2 follow-up statements
783 WWUS73 KARX 230935 NPWARX URGENT - WEATHER MESSAGE National Weather Service La Crosse WI 435 AM CDT Thu Sep 23 2021 WIZ017-029-034-042>044-231300- /O.CON.KARX.FR.Y.0009.000000T0000Z-210923T1300Z/ Taylor-Clark-Jackson-Monroe-Juneau-Adams- Including the cities of Medford, Neillsville, Black River Falls, Sparta, Tomah, Mauston, and Friendship 435 AM CDT Thu Sep 23 2021 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM CDT THIS MORNING... * WHAT...Temperatures dipping in the low to mid 30s will result in frost formation. * WHERE...Taylor, Clark, Jackson, Monroe, Juneau and Adams counties. * WHEN...Until 8 AM CDT Thursday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$
221 WWUS73 KARX 231302 NPWARX URGENT - WEATHER MESSAGE National Weather Service La Crosse WI 802 AM CDT Thu Sep 23 2021 WIZ017-029-034-042>044-231415- /O.EXP.KARX.FR.Y.0009.000000T0000Z-210923T1300Z/ Taylor-Clark-Jackson-Monroe-Juneau-Adams- Including the cities of Medford, Neillsville, Black River Falls, Sparta, Tomah, Mauston, and Friendship 802 AM CDT Thu Sep 23 2021 ...FROST ADVISORY HAS EXPIRED... Temperatures have warmed into the mid to upper 30s in most areas, so the Frost Advisory was allowed to expire. $$ Boyne
Nearby
Frost Advisories in Wisconsin, 2021Every frost advisory 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.