Alert archive / Missouri / Frost Advisories in 2021
Frost Advisory 6, NWS Kansas City, MO
NWS Kansas City, MO issued this frost advisory at Oct 21, 2021, 3:22 AM CDT for 4 counties in Missouri. It took effect at Oct 22, 2021, 1:00 AM CDT. It was in force for 8 hr.
The area
The counties it named.
The facts
- Issued
- Oct 21, 2021, 3:22 AM CDT (08:22 UTC)
- In effect from
- Oct 22, 2021, 1:00 AM CDT
- Expired
- Oct 22, 2021, 9:00 AM CDT
- In force
- 8 hr
- Issued by
- NWS Kansas City, MO
Counties Atchison County, MO, Holt County, MO, Nodaway County, MO, Worth County, MO
The radar
The Omaha radar (KOAX), 159 km from the middle of the area, began a volume at 08:23 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
Topeka, KS (KTOP), launched 00:00Z, 8.4 hours before the alert went out and 159 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
- 1694 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- -69 m²/s²
- 0-3 km storm-relative helicity
- 33 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
224 WWUS73 KEAX 210822 NPWEAX URGENT - WEATHER MESSAGE National Weather Service Kansas City/Pleasant Hill MO 322 AM CDT Thu Oct 21 2021 MOZ001>003-011-211630- /O.NEW.KEAX.FR.Y.0006.211022T0600Z-211022T1400Z/ Atchison MO-Nodaway-Worth-Holt- Including the cities of Tarkio, Rock Port, Fairfax, Maryville, Grant City, Mound City, Oregon, Maitland, Forest City, and Craig 322 AM CDT Thu Oct 21 2021 ...FROST ADVISORY IN EFFECT FROM 1 AM TO 9 AM CDT FRIDAY... * WHAT...Temperatures as low as 36 will result in frost formation. * WHERE...Atchison MO, Nodaway, Worth and Holt Counties. * WHEN...From 1 AM to 9 AM CDT Friday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. * ADDITIONAL DETAILS...The best chances for frost are expected to be concentrated to valleys and other low lying areas. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$
1 follow-up statement
042 WWUS73 KEAX 221350 NPWEAX URGENT - WEATHER MESSAGE National Weather Service Kansas City/Pleasant Hill MO 850 AM CDT Fri Oct 22 2021 MOZ001>003-011-221500- /O.EXP.KEAX.FR.Y.0006.000000T0000Z-211022T1400Z/ Atchison MO-Nodaway-Worth-Holt- Including the cities of Tarkio, Rock Port, Fairfax, Maryville, Grant City, Mound City, Oregon, Maitland, Forest City, and Craig 850 AM CDT Fri Oct 22 2021 ...FROST ADVISORY WILL EXPIRE AT 9 AM CDT THIS MORNING... $$
Nearby
Frost Advisories in Missouri, 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.