Alert archive / Iowa / Frost Advisories in 2021
Frost Advisory 8, NWS Quad Cities, IA
NWS Quad Cities, IA issued this frost advisory at May 28, 2021, 3:30 AM CDT for 13 counties in Iowa; 5 counties in Illinois. It took effect at May 29, 2021, 12:00 AM CDT. It was in force for 7 hr.
The area
The counties it named.
The facts
- Issued
- May 28, 2021, 3:30 AM CDT (08:30 UTC)
- In effect from
- May 29, 2021, 12:00 AM CDT
- Expired
- May 29, 2021, 7:00 AM CDT
- In force
- 7 hr
- Issued by
- NWS Quad Cities, IA
Counties Benton County, IA, Buchanan County, IA, Cedar County, IA, Clinton County, IA, Delaware County, IA, Dubuque County, IA, Iowa County, IA, Jackson County, IA, Johnson County, IA, Jones County, IA, Linn County, IA, Muscatine County, IA, Scott County, IA, Carroll County, IL, Jo Daviess County, IL, Rock Island County, IL, Stephenson County, IL, Whiteside County, IL
The radar
The Quad Cities radar (KDVN), 52 km from the middle of the area, began a volume at 08:31 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 00:00Z, 8.5 hours before the alert went out and 56 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
- 735 m above ground
- 0-6 km bulk shear
- 59 kt
- 0-1 km storm-relative helicity
- 357 m²/s²
- 0-3 km storm-relative helicity
- 391 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
092 WWUS73 KDVN 280830 NPWDVN URGENT - WEATHER MESSAGE National Weather Service Quad Cities IA IL 330 AM CDT Fri May 28 2021 IAZ040>042-051>054-063>068-ILZ001-002-007-009-015-281630- /O.NEW.KDVN.FR.Y.0008.210529T0500Z-210529T1200Z/ Buchanan-Delaware-Dubuque-Benton-Linn-Jones-Jackson-Iowa-Johnson- Cedar-Clinton-Muscatine-Scott-Jo Daviess-Stephenson-Carroll- Whiteside-Rock Island- Including the cities of Independence, Manchester, Dubuque, Vinton, Cedar Rapids, Anamosa, Maquoketa, Marengo, Iowa City, Tipton, Clinton, Muscatine, Davenport, Bettendorf, Galena, Freeport, Mount Carroll, Sterling, Moline, and Rock Island 330 AM CDT Fri May 28 2021 ...FROST ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 7 AM CDT SATURDAY... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Portions of east central and northeast Iowa and northwest Illinois. * WHEN...From midnight tonight to 7 AM CDT Saturday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ Haase www.weather.gov/dvn
4 follow-up statements
270 WWUS73 KDVN 281628 NPWDVN URGENT - WEATHER MESSAGE National Weather Service Quad Cities IA IL 1128 AM CDT Fri May 28 2021 IAZ040>042-051>054-063>068-ILZ001-002-007-009-015-290030- /O.CON.KDVN.FR.Y.0008.210529T0500Z-210529T1200Z/ Buchanan-Delaware-Dubuque-Benton-Linn-Jones-Jackson-Iowa-Johnson- Cedar-Clinton-Muscatine-Scott-Jo Daviess-Stephenson-Carroll- Whiteside-Rock Island- Including the cities of Independence, Manchester, Dubuque, Vinton, Cedar Rapids, Anamosa, Maquoketa, Marengo, Iowa City, Tipton, Clinton, Muscatine, Davenport, Bettendorf, Galena, Freeport, Mount Carroll, Sterling, Moline, and Rock Island 1128 AM CDT Fri May 28 2021 ...FROST ADVISORY REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 7 AM CDT SATURDAY... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Portions of east central and northeast Iowa and northwest Illinois. * WHEN...From midnight tonight to 7 AM CDT Saturday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ www.weather.gov/dvn
733 WWUS73 KDVN 290137 NPWDVN URGENT - WEATHER MESSAGE National Weather Service Quad Cities IA IL 837 PM CDT Fri May 28 2021 IAZ040>042-051>054-063>068-ILZ001-002-007-009-015-290945- /O.CON.KDVN.FR.Y.0008.210529T0500Z-210529T1200Z/ Buchanan-Delaware-Dubuque-Benton-Linn-Jones-Jackson-Iowa-Johnson- Cedar-Clinton-Muscatine-Scott-Jo Daviess-Stephenson-Carroll- Whiteside-Rock Island- Including the cities of Independence, Manchester, Dubuque, Vinton, Cedar Rapids, Anamosa, Maquoketa, Marengo, Iowa City, Tipton, Clinton, Muscatine, Davenport, Bettendorf, Galena, Freeport, Mount Carroll, Sterling, Moline, and Rock Island 837 PM CDT Fri May 28 2021 ...FROST ADVISORY REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 7 AM CDT SATURDAY... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Portions of east central and northeast Iowa and northwest Illinois. * WHEN...From midnight tonight to 7 AM CDT Saturday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ www.weather.gov/dvn
396 WWUS73 KDVN 290736 NPWDVN URGENT - WEATHER MESSAGE National Weather Service Quad Cities IA IL 236 AM CDT Sat May 29 2021 IAZ040>042-051>054-063>068-ILZ001-002-007-009-015-291200- /O.CON.KDVN.FR.Y.0008.000000T0000Z-210529T1200Z/ Buchanan-Delaware-Dubuque-Benton-Linn-Jones-Jackson-Iowa-Johnson- Cedar-Clinton-Muscatine-Scott-Jo Daviess-Stephenson-Carroll- Whiteside-Rock Island- Including the cities of Independence, Manchester, Dubuque, Vinton, Cedar Rapids, Anamosa, Maquoketa, Marengo, Iowa City, Tipton, Clinton, Muscatine, Davenport, Bettendorf, Galena, Freeport, Mount Carroll, Sterling, Moline, and Rock Island 236 AM CDT Sat May 29 2021 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 7 AM CDT THIS MORNING... * WHAT...Temperatures in the lower to mid 30s will result in frost formation. * WHERE...Portions of east central and northeast Iowa and northwest Illinois. * WHEN...Until 7 AM CDT this morning. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ www.weather.gov/dvn
243 WWUS73 KDVN 291143 NPWDVN URGENT - WEATHER MESSAGE National Weather Service Quad Cities IA IL 643 AM CDT Sat May 29 2021 IAZ040>042-051>054-063>068-ILZ001-002-007-009-015-291245- /O.EXP.KDVN.FR.Y.0008.000000T0000Z-210529T1200Z/ Buchanan-Delaware-Dubuque-Benton-Linn-Jones-Jackson-Iowa-Johnson- Cedar-Clinton-Muscatine-Scott-Jo Daviess-Stephenson-Carroll- Whiteside-Rock Island- Including the cities of Independence, Manchester, Dubuque, Vinton, Cedar Rapids, Anamosa, Maquoketa, Marengo, Iowa City, Tipton, Clinton, Muscatine, Davenport, Bettendorf, Galena, Freeport, Mount Carroll, Sterling, Moline, and Rock Island 643 AM CDT Sat May 29 2021 ...FROST ADVISORY WILL EXPIRE AT 7 AM CDT THIS MORNING... Temperatures dipped into the mid 30s across eastern Iowa and northwest Illinois, along and north of Highway 30. With sunny skies temperatures have already started warming. Therefore, the frost advisory will be allowed to expire at 7 am. $$ Haase www.weather.gov/dvn
The office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 27, 7:43 PM CDT | Special Weather Statement | DVN | Van Buren | 32 min |
| May 27, 7:58 PM CDT | Special Weather Statement | DVN | Van Buren | 32 min |
| May 27, 8:14 PM CDT | Special Weather Statement | DVN | Van Buren | 61 min |
| May 27, 9:07 PM CDT | Special Weather Statement | DVN | Lee | 53 min |
Nearby
Frost Advisories in Iowa, 2021Frost Advisories in Illinois, 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.