Alert archive / Oklahoma / Frost Advisories in 2021
Frost Advisory 2, NWS Norman, OK
NWS Norman, OK issued this frost advisory at Nov 3, 2021, 3:33 AM CDT for 5 counties in Oklahoma. It took effect at Nov 4, 2021, 3:00 AM CDT. It was in force for 6 hr.
The area
The counties it named.
The facts
- Issued
- Nov 3, 2021, 3:33 AM CDT (08:33 UTC)
- In effect from
- Nov 4, 2021, 3:00 AM CDT
- Expired
- Nov 4, 2021, 9:00 AM CDT
- In force
- 6 hr
- Issued by
- NWS Norman, OK
Counties Ellis County, OK, Harper County, OK, Roger Mills County, OK, Woods County, OK, Woodward County, OK
The radar
The Vance AFB radar (KVNX), 125 km from the middle of the area, began a volume at 08:33 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
Dodge City, (KDDC), launched 00:00Z, 8.6 hours before the alert went out and 160 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
- 2 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 460 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 67 m²/s²
- 0-3 km storm-relative helicity
- 208 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
343 WWUS74 KOUN 030833 NPWOUN URGENT - WEATHER MESSAGE National Weather Service Norman OK 333 AM CDT Wed Nov 3 2021 OKZ004-005-009-010-031645- /O.NEW.KOUN.FR.Y.0002.211104T0800Z-211104T1400Z/ Harper-Woods-Ellis-Woodward- Including the cities of Buffalo, Laverne, Alva, Shattuck, Arnett, Gage, Fargo, and Woodward 333 AM CDT Wed Nov 3 2021 ...FROST ADVISORY IN EFFECT FROM 3 AM TO 9 AM CDT THURSDAY... * WHAT...Temperatures as low as 31 will result in frost formation. * WHERE...Harper, Woods, Ellis and Woodward Counties. * WHEN...From 3 AM to 9 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. && $$
3 follow-up statements
922 WWUS74 KOUN 031848 NPWOUN URGENT - WEATHER MESSAGE National Weather Service Norman OK 148 PM CDT Wed Nov 3 2021 OKZ014-040300- /O.EXA.KOUN.FR.Y.0002.211104T0800Z-211104T1400Z/ Roger Mills- Including the cities of Cheyenne and Hammon 148 PM CDT Wed Nov 3 2021 ...FROST ADVISORY IN EFFECT FROM 3 AM TO 9 AM CDT THURSDAY... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Roger Mills County. * WHEN...From 3 AM to 9 AM CDT Thursday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ OKZ004-005-009-010-040300- /O.CON.KOUN.FR.Y.0002.211104T0800Z-211104T1400Z/ Harper-Woods-Ellis-Woodward- Including the cities of Buffalo, Laverne, Alva, Shattuck, Arnett, Gage, Fargo, and Woodward 148 PM CDT Wed Nov 3 2021 ...FROST ADVISORY REMAINS IN EFFECT FROM 3 AM TO 9 AM CDT THURSDAY... * WHAT...Temperatures as low as 32 will result in frost formation. * WHERE...Harper, Woods, Woodward and Ellis Counties. * WHEN...From 3 AM to 9 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. && $$
347 WWUS74 KOUN 040241 AAA NPWOUN URGENT - WEATHER MESSAGE...UPDATED National Weather Service Norman OK 941 PM CDT Wed Nov 3 2021 OKZ004-005-009-010-014-041400- /O.CON.KOUN.FR.Y.0002.211104T0800Z-211104T1400Z/ Harper-Woods-Ellis-Woodward-Roger Mills- Including the cities of Buffalo, Laverne, Alva, Shattuck, Arnett, Gage, Fargo, Woodward, Cheyenne, and Hammon 941 PM CDT Wed Nov 3 2021 ...FROST ADVISORY REMAINS IN EFFECT FROM 3 AM TO 9 AM CDT THURSDAY... * WHAT...Temperatures in the lower and middle 30s will result in frost formation. * WHERE...Roger Mills, Harper, Woods, Woodward and Ellis Counties. * WHEN...From 3 AM to 9 AM CDT Thursday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$
663 WWUS74 KOUN 040813 NPWOUN URGENT - WEATHER MESSAGE National Weather Service Norman OK 313 AM CDT Thu Nov 4 2021 OKZ042-043-047-048-052-041615- /O.NEW.KOUN.FR.Y.0003.211105T0800Z-211105T1400Z/ Pontotoc-Coal-Johnston-Atoka-Bryan- Including the cities of Ada, Coalgate, Tishomingo, Atoka, and Durant 313 AM CDT Thu Nov 4 2021 ...FROST ADVISORY IN EFFECT FROM 3 AM TO 9 AM CDT FRIDAY... * WHAT...Temperatures as low as 36 will result in frost formation. * WHERE...Pontotoc, Coal, Johnston, Atoka and Bryan Counties. * WHEN...From 3 AM to 9 AM CDT Friday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ OKZ004-005-009-010-014-041400- /O.CON.KOUN.FR.Y.0002.000000T0000Z-211104T1400Z/ Harper-Woods-Ellis-Woodward-Roger Mills- Including the cities of Buffalo, Laverne, Alva, Shattuck, Arnett, Gage, Fargo, Woodward, Cheyenne, and Hammon 313 AM CDT Thu Nov 4 2021 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM CDT THIS MORNING... * WHAT...Temperatures in the lower and middle 30s will result in frost formation. * WHERE...Roger Mills, Harper, Woods, Woodward and Ellis Counties. * WHEN...Through 9 AM CDT Thursday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$
Nearby
Frost Advisories in Oklahoma, 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.