Alert archive / Iowa / Frost Advisories in 2021
Frost Advisory 1, NWS Quad Cities, IA
NWS Quad Cities, IA issued this frost advisory at Apr 13, 2021, 2:47 PM CDT for 13 counties in Iowa; Clark County, Scotland County, Missouri; 9 counties in Illinois. It took effect at Apr 14, 2021, 1:00 AM CDT. It was in force for 7 hr.
The area
The counties it named.
The facts
- Issued
- Apr 13, 2021, 2:47 PM CDT (19:47 UTC)
- In effect from
- Apr 14, 2021, 1:00 AM CDT
- Expired
- Apr 14, 2021, 8:00 AM CDT
- In force
- 7 hr
- Issued by
- NWS Quad Cities, IA
All 24 counties
Cedar County, IA, Des Moines County, IA, Henry County, IA, Iowa County, IA, Jefferson County, IA, Johnson County, IA, Keokuk County, IA, Lee County, IA, Louisa County, IA, Muscatine County, IA, Scott County, IA, Van Buren County, IA, Washington County, IA, Bureau County, IL, Hancock County, IL, Henderson County, IL, Henry County, IL, McDonough County, IL, Mercer County, IL, Putnam County, IL, Rock Island County, IL, Warren County, IL, Clark County, MO, Scotland County, MO
The radar
The Quad Cities radar (KDVN), 73 km from the middle of the area, began a volume at 19:49 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
Davenport, (KDVN), launched 12:00Z, 7.8 hours before the alert went out and 78 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
- 1104 m above ground
- 0-6 km bulk shear
- 75 kt
- 0-1 km storm-relative helicity
- -107 m²/s²
- 0-3 km storm-relative helicity
- 14 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
473 WWUS73 KDVN 131947 NPWDVN URGENT - WEATHER MESSAGE National Weather Service Quad Cities IA IL 247 PM CDT Tue Apr 13 2021 IAZ076>078-087>089-098-099-ILZ024>026-034-035-MOZ009-010-140400- /O.NEW.KDVN.FR.Y.0001.210414T0600Z-210414T1300Z/ Keokuk-Washington-Louisa-Jefferson-Henry IA-Des Moines-Van Buren- Lee-Mercer-Henderson-Warren-Hancock-McDonough-Scotland-Clark- Including the cities of Sigourney, Washington, Wapello, Fairfield, Mount Pleasant, Burlington, Keosauqua, Fort Madison, Aledo, Oquawka, Monmouth, Carthage, Macomb, Memphis, and Kahoka 247 PM CDT Tue Apr 13 2021 ...FROST ADVISORY IN EFFECT FROM 1 AM TO 8 AM CDT WEDNESDAY... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Portions of northeast Missouri, southeast Iowa and northwest and west central Illinois. * WHEN...From 1 AM to 8 AM CDT Wednesday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ www.weather.gov/dvn
3 follow-up statements
745 WWUS73 KDVN 140103 NPWDVN URGENT - WEATHER MESSAGE National Weather Service Quad Cities IA IL 803 PM CDT Tue Apr 13 2021 IAZ063>065-067-068-ILZ015>018-140915- /O.EXA.KDVN.FR.Y.0001.210414T0600Z-210414T1300Z/ Iowa-Johnson-Cedar-Muscatine-Scott-Rock Island-Henry IL-Bureau- Putnam- Including the cities of Marengo, Iowa City, Tipton, Muscatine, Davenport, Bettendorf, Moline, Rock Island, Geneseo, Princeton, and Hennepin 803 PM CDT Tue Apr 13 2021 ...FROST ADVISORY IN EFFECT FROM 1 AM TO 8 AM CDT WEDNESDAY... * WHAT...Temperatures in the lower 30s will result in frost formation. * WHERE...In Iowa, Iowa, Johnson, Cedar, Muscatine and Scott Counties. In Illinois, Rock Island, Henry IL, Bureau and Putnam Counties. * WHEN...From 1 AM to 8 AM CDT Wednesday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ IAZ076>078-087>089-098-099-ILZ024>026-034-035-MOZ009-010-140915- /O.CON.KDVN.FR.Y.0001.210414T0600Z-210414T1300Z/ Keokuk-Washington-Louisa-Jefferson-Henry IA-Des Moines-Van Buren- Lee-Mercer-Henderson-Warren-Hancock-McDonough-Scotland-Clark- Including the cities of Sigourney, Washington, Wapello, Fairfield, Mount Pleasant, Burlington, Keosauqua, Fort Madison, Aledo, Oquawka, Monmouth, Carthage, Macomb, Memphis, and Kahoka 803 PM CDT Tue Apr 13 2021 ...FROST ADVISORY REMAINS IN EFFECT FROM 1 AM TO 8 AM CDT WEDNESDAY... * WHAT...Temperatures in the lower 30s will result in frost formation. * WHERE...Portions of northeast Missouri, southeast Iowa and northwest and west central Illinois. * WHEN...From 1 AM to 8 AM CDT Wednesday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ www.weather.gov/dvn
563 WWUS73 KDVN 140803 NPWDVN URGENT - WEATHER MESSAGE National Weather Service Quad Cities IA IL 303 AM CDT Wed Apr 14 2021 IAZ063>065-067-068-076>078-087>089-098-099-ILZ015>018-024>026-034- 035-MOZ009-010-141300- /O.CON.KDVN.FR.Y.0001.000000T0000Z-210414T1300Z/ Iowa-Johnson-Cedar-Muscatine-Scott-Keokuk-Washington-Louisa- Jefferson-Henry IA-Des Moines-Van Buren-Lee-Rock Island-Henry IL- Bureau-Putnam-Mercer-Henderson-Warren-Hancock-McDonough-Scotland- Clark- Including the cities of Marengo, Iowa City, Tipton, Muscatine, Davenport, Bettendorf, Sigourney, Washington, Wapello, Fairfield, Mount Pleasant, Burlington, Keosauqua, Fort Madison, Moline, Rock Island, Geneseo, Princeton, Hennepin, Aledo, Oquawka, Monmouth, Carthage, Macomb, Memphis, and Kahoka 303 AM CDT Wed Apr 14 2021 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM CDT THIS MORNING... * WHAT...Temperatures in the lower 30s will result in frost formation. * WHERE...Portions of northeast Missouri, southeast Iowa and northwest and west central Illinois. * WHEN...Through 8 AM Today. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ www.weather.gov/dvn
954 WWUS73 KDVN 141304 NPWDVN URGENT - WEATHER MESSAGE National Weather Service Quad Cities IA IL 804 AM CDT Wed Apr 14 2021 IAZ063>065-067-068-076>078-087>089-098-099-ILZ015>018-024>026-034- 035-MOZ009-010-141415- /O.EXP.KDVN.FR.Y.0001.000000T0000Z-210414T1300Z/ Iowa-Johnson-Cedar-Muscatine-Scott-Keokuk-Washington-Louisa- Jefferson-Henry IA-Des Moines-Van Buren-Lee-Rock Island-Henry IL- Bureau-Putnam-Mercer-Henderson-Warren-Hancock-McDonough-Scotland- Clark- Including the cities of Marengo, Iowa City, Tipton, Muscatine, Davenport, Bettendorf, Sigourney, Washington, Wapello, Fairfield, Mount Pleasant, Burlington, Keosauqua, Fort Madison, Moline, Rock Island, Geneseo, Princeton, Hennepin, Aledo, Oquawka, Monmouth, Carthage, Macomb, Memphis, and Kahoka 804 AM CDT Wed Apr 14 2021 ...FROST ADVISORY HAS EXPIRED... Temperatures have warmed above freezing across the area with the sunrise. Therefore, the frost advisory has been allowed to expire. $$ www.weather.gov/dvn
Nearby
Frost Advisories in Iowa, 2021Frost Advisories in Illinois, 2021Frost 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.