Alert archive / Iowa / Frost Advisories in 2012
Frost Advisory 2, NWS Quad Cities, IA
NWS Quad Cities, IA issued this frost advisory at Apr 20, 2012, 3:24 PM CDT for 16 counties in Iowa; 5 counties in Illinois. It took effect at Apr 21, 2012, 3:00 AM CDT. It was in force for 5 hr.
The area
The counties it named.
The facts
- Issued
- Apr 20, 2012, 3:24 PM CDT (20:24 UTC)
- In effect from
- Apr 21, 2012, 3:00 AM CDT
- Expired
- Apr 21, 2012, 8:00 AM CDT
- In force
- 5 hr
- Issued by
- NWS Quad Cities, IA
All 21 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, Keokuk County, IA, Linn County, IA, Louisa County, IA, Muscatine County, IA, Scott County, IA, Washington County, IA, Bureau County, IL, Henry County, IL, Mercer County, IL, Putnam County, IL, Rock Island County, IL
The radar
The Quad Cities radar (KDVN), 41 km from the middle of the area, began a volume at 20:29 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, 8.4 hours before the alert went out and 47 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
- 3 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 455 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- -43 m²/s²
- 0-3 km storm-relative helicity
- -6 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
317 WWUS73 KDVN 202024 NPWDVN URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE QUAD CITIES IA IL 324 PM CDT FRI APR 20 2012 ...FROST AND FREEZING TEMPERATURES ARE EXPECTED TONIGHT... .CONDITIONS WILL BE FAVORABLE TONIGHT FOR TEMPERATURES AT OR BELOW FREEZING OVER NORTHWEST ILLINOIS AND FOR AREAS OF FROST OVER PARTS OF EAST CENTRAL IOWA AND WEST CENTRAL ILLINOIS. SKIES WILL CLEAR BY EARLY THIS EVENING WITH WINDS BECOMING LIGHT AS HIGH PRESSURE MOVES INTO THE REGION. THE CLEAR SKIES AND LIGHT WINDS WILL CREATE FAVORABLE CONDITIONS FOR FREEZING OR NEAR FREEZING TEMPERATURES AND AREAS OF FROST BY LATE TONIGHT. ILZ001-002-007-009-210630- /O.NEW.KDVN.FZ.W.0005.120421T0800Z-120421T1300Z/ JO DAVIESS-STEPHENSON-CARROLL-WHITESIDE- INCLUDING THE CITIES OF...GALENA...FREEPORT...MOUNT CARROLL... STERLING...ROCK FALLS 324 PM CDT FRI APR 20 2012 ...FREEZE WARNING IN EFFECT FROM 3 AM TO 8 AM CDT SATURDAY... THE NATIONAL WEATHER SERVICE IN QUAD CITIES HAS ISSUED A FREEZE WARNING...WHICH IS IN EFFECT FROM 3 AM TO 8 AM CDT SATURDAY. * TIMING...TEMPERATURES ARE EXPECTED TO DROP INTO THE LOWER 30S BY 3 AM AND WILL REMAIN AT OR BELOW FREEZING FOR SEVERAL HOURS. * IMPACTS...THE COLD TEMPERATURES WILL CAUSE DAMAGE TO SENSITIVE OUTDOOR PLANTS THE ARE NOT PROTECTED. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT OR HIGHLY LIKELY. THESE CONDITIONS WILL KILL CROPS AND OTHER SENSITIVE VEGETATION. COVER SENSITIVE PLANTS OR BRING INDOORS FOR PROTECTION. && $$ IAZ040>042-051>054-063>068-076>078-ILZ015>018-024-210630- /O.NEW.KDVN.FR.Y.0002.120421T0800Z-120421T1300Z/ BUCHANAN-DELAWARE-DUBUQUE-BENTON-LINN-JONES-JACKSON-IOWA-JOHNSON- CEDAR-CLINTON-MUSCATINE-SCOTT-KEOKUK-WASHINGTON-LOUISA- ROCK ISLAND-HENRY IL-BUREAU-PUTNAM-MERCER- INCLUDING THE CITIES OF...INDEPENDENCE...MANCHESTER...DUBUQUE... VINTON...CEDAR RAPIDS...ANAMOSA...MAQUOKETA...MARENGO... IOWA CITY...TIPTON...CLINTON...MUSCATINE...BETTENDORF... DAVENPORT...SIGOURNEY...WASHINGTON...WAPELLO...MOLINE... ROCK ISLAND...KEWANEE...PRINCETON...HENNEPIN...ALEDO 324 PM CDT FRI APR 20 2012 ...FROST ADVISORY IN EFFECT FROM 3 AM TO 8 AM CDT SATURDAY... THE NATIONAL WEATHER SERVICE IN QUAD CITIES HAS ISSUED A FROST ADVISORY...WHICH IS IN EFFECT FROM 3 AM TO 8 AM CDT SATURDAY. * TIMING...TEMPERATURES WILL FALL INTO THE MIDDLE 30S LATE TONIGHT. THE COLD TEMPERATURES...MOSTLY CLEAR SKIES AND LIGHT WINDS WILL CREATE FAVORABLE CONDITIONS FOR FROST FORMATION * IMPACTS...THE FROST WILL CAUSE DAMAGE TO SENSITIVE OUTDOOR PLANTS THAT ARE NOT PROTECTED. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FROST ADVISORY MEANS THAT FROST IS LIKELY. COVER OR MOVE SENSITIVE PLANTS INDOORS. && $$
3 follow-up statements
976 WWUS73 KDVN 210213 NPWDVN URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE QUAD CITIES IA IL 913 PM CDT FRI APR 20 2012 ...FROST AND FREEZING TEMPERATURES ARE EXPECTED TONIGHT... .CONDITIONS WILL BE FAVORABLE TONIGHT FOR TEMPERATURES AT OR BELOW FREEZING OVER NORTHWEST ILLINOIS AND FOR AREAS OF FROST OVER PARTS OF EAST CENTRAL IOWA AND WEST CENTRAL ILLINOIS. SKIES WILL CONTINUE TO CLEAR THIS EVENING WITH WINDS BECOMING LIGHT AS HIGH PRESSURE MOVES INTO THE REGION. THE CLEAR SKIES AND LIGHT WINDS WILL CREATE FAVORABLE CONDITIONS FOR FREEZING OR NEAR FREEZING TEMPERATURES AND AREAS OF FROST BY LATE TONIGHT. ILZ001-002-007-009-211215- /O.CON.KDVN.FZ.W.0005.120421T0800Z-120421T1300Z/ JO DAVIESS-STEPHENSON-CARROLL-WHITESIDE- INCLUDING THE CITIES OF...GALENA...FREEPORT...MOUNT CARROLL... STERLING...ROCK FALLS 913 PM CDT FRI APR 20 2012 ...FREEZE WARNING REMAINS IN EFFECT FROM 3 AM TO 8 AM CDT SATURDAY... * TIMING...TEMPERATURES ARE EXPECTED TO DROP INTO THE LOWER 30S BY 3 AM AND WILL REMAIN AT OR BELOW FREEZING FOR SEVERAL HOURS. * IMPACTS...THE COLD TEMPERATURES WILL CAUSE DAMAGE TO SENSITIVE OUTDOOR PLANTS THE ARE NOT PROTECTED. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT OR HIGHLY LIKELY. THESE CONDITIONS WILL KILL CROPS AND OTHER SENSITIVE VEGETATION. COVER SENSITIVE PLANTS OR BRING INDOORS FOR PROTECTION. && $$ IAZ040>042-051>054-063>068-076>078-ILZ015>018-024-211215- /O.CON.KDVN.FR.Y.0002.120421T0800Z-120421T1300Z/ BUCHANAN-DELAWARE-DUBUQUE-BENTON-LINN-JONES-JACKSON-IOWA-JOHNSON- CEDAR-CLINTON-MUSCATINE-SCOTT-KEOKUK-WASHINGTON-LOUISA- ROCK ISLAND-HENRY IL-BUREAU-PUTNAM-MERCER- INCLUDING THE CITIES OF...INDEPENDENCE...MANCHESTER...DUBUQUE... VINTON...CEDAR RAPIDS...ANAMOSA...MAQUOKETA...MARENGO... IOWA CITY...TIPTON...CLINTON...MUSCATINE...BETTENDORF... DAVENPORT...SIGOURNEY...WASHINGTON...WAPELLO...MOLINE... ROCK ISLAND...KEWANEE...PRINCETON...HENNEPIN...ALEDO 913 PM CDT FRI APR 20 2012 ...FROST ADVISORY REMAINS IN EFFECT FROM 3 AM TO 8 AM CDT SATURDAY... * TIMING...TEMPERATURES WILL FALL INTO THE MIDDLE 30S LATE TONIGHT. THE COLD TEMPERATURES...MOSTLY CLEAR SKIES AND LIGHT WINDS WILL CREATE FAVORABLE CONDITIONS FOR FROST FORMATION * IMPACTS...THE FROST WILL CAUSE DAMAGE TO SENSITIVE OUTDOOR PLANTS THAT ARE NOT PROTECTED. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FROST ADVISORY MEANS THAT FROST IS LIKELY. COVER OR MOVE SENSITIVE PLANTS INDOORS. && $$
989 WWUS73 KDVN 210839 NPWDVN URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE QUAD CITIES IA IL 339 AM CDT SAT APR 21 2012 ...FROST AND FREEZING TEMPERATURES ARE EXPECTED TONIGHT... .LIGHT WINDS AND INITIALLY CLEAR SKIES HAVE ALLOWED TEMPERATURES TO DROP INTO THE 30S. FROST IS STILL POSSIBLE PRIOR TO SUNRISE ALONG WITH TEMPERATURES RIGHT AROUND FREEZING IN SOME LOCATIONS. ILZ001-002-007-009-211300- /O.CON.KDVN.FZ.W.0005.000000T0000Z-120421T1300Z/ JO DAVIESS-STEPHENSON-CARROLL-WHITESIDE- INCLUDING THE CITIES OF...GALENA...FREEPORT...MOUNT CARROLL... STERLING...ROCK FALLS 339 AM CDT SAT APR 21 2012 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 8 AM CDT THIS MORNING... * TIMING...TEMPERATURES NEAR FREEZING THROUGH SUNRISE. * IMPACTS...THE COLD TEMPERATURES WILL CAUSE DAMAGE TO SENSITIVE OUTDOOR PLANTS THE ARE NOT PROTECTED. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT OR HIGHLY LIKELY. THESE CONDITIONS WILL KILL CROPS AND OTHER SENSITIVE VEGETATION. COVER SENSITIVE PLANTS OR BRING INDOORS FOR PROTECTION. && $$ IAZ040>042-051>054-063>068-076>078-ILZ015>018-024-211300- /O.CON.KDVN.FR.Y.0002.000000T0000Z-120421T1300Z/ BUCHANAN-DELAWARE-DUBUQUE-BENTON-LINN-JONES-JACKSON-IOWA-JOHNSON- CEDAR-CLINTON-MUSCATINE-SCOTT-KEOKUK-WASHINGTON-LOUISA- ROCK ISLAND-HENRY IL-BUREAU-PUTNAM-MERCER- INCLUDING THE CITIES OF...INDEPENDENCE...MANCHESTER...DUBUQUE... VINTON...CEDAR RAPIDS...ANAMOSA...MAQUOKETA...MARENGO... IOWA CITY...TIPTON...CLINTON...MUSCATINE...BETTENDORF... DAVENPORT...SIGOURNEY...WASHINGTON...WAPELLO...MOLINE... ROCK ISLAND...KEWANEE...PRINCETON...HENNEPIN...ALEDO 339 AM CDT SAT APR 21 2012 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM CDT THIS MORNING... * TIMING...TEMPERATURES IN THE MID 30S WITH LIGHT WINDS WILL CREATE FAVORABLE CONDITIONS FOR FROST THROUGH SUNRISE. * IMPACTS...THE FROST WILL CAUSE DAMAGE TO SENSITIVE OUTDOOR PLANTS THAT ARE NOT PROTECTED. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FROST ADVISORY MEANS THAT FROST IS LIKELY. COVER OR MOVE SENSITIVE PLANTS INDOORS. && $$
620 WWUS73 KDVN 211302 NPWDVN URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE QUAD CITIES IA IL 802 AM CDT SAT APR 21 2012 ILZ001-002-007-009-211415- /O.EXP.KDVN.FZ.W.0005.000000T0000Z-120421T1300Z/ JO DAVIESS-STEPHENSON-CARROLL-WHITESIDE- INCLUDING THE CITIES OF...GALENA...FREEPORT...MOUNT CARROLL... STERLING...ROCK FALLS 802 AM CDT SAT APR 21 2012 ...FREEZE WARNING HAS EXPIRED... TEMPERATURES HAVE CLIMBED ABOVE FREEZING. THUS THE FREEZE WARNING HAS EXPIRED. $$ IAZ040>042-051>054-063>068-076>078-ILZ015>018-024-211415- /O.EXP.KDVN.FR.Y.0002.000000T0000Z-120421T1300Z/ BUCHANAN-DELAWARE-DUBUQUE-BENTON-LINN-JONES-JACKSON-IOWA-JOHNSON- CEDAR-CLINTON-MUSCATINE-SCOTT-KEOKUK-WASHINGTON-LOUISA- ROCK ISLAND-HENRY IL-BUREAU-PUTNAM-MERCER- INCLUDING THE CITIES OF...INDEPENDENCE...MANCHESTER...DUBUQUE... VINTON...CEDAR RAPIDS...ANAMOSA...MAQUOKETA...MARENGO... IOWA CITY...TIPTON...CLINTON...MUSCATINE...BETTENDORF... DAVENPORT...SIGOURNEY...WASHINGTON...WAPELLO...MOLINE... ROCK ISLAND...KEWANEE...PRINCETON...HENNEPIN...ALEDO 802 AM CDT SAT APR 21 2012 ...FROST ADVISORY HAS EXPIRED... TEMPERATURES HAVE CLIMBED INTO THE MID AND UPPER 30S. THUS THE FROST ADVISORY HAS EXPIRED. $$
The office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 20, 3:24 PM CDT | Freeze Warning | DVN | Carroll, Jo Daviess, Stephenson, Whiteside | 17 hr |
Nearby
Frost Advisories in Iowa, 2012Frost Advisories in Illinois, 2012Every frost advisory in 2012
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.