Alert archive / Iowa / Freeze Warnings in 2012
Freeze Warning 3, NWS Quad Cities, IA
NWS Quad Cities, IA issued this freeze warning at Apr 10, 2012, 3:37 AM CDT for 13 counties in Illinois; 21 counties in Iowa; Clark County, Scotland County, Missouri. It took effect at Apr 11, 2012, 3:00 AM CDT. It was in force for 5 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Apr 10, 2012, 3:37 AM CDT (08:37 UTC)
- In effect from
- Apr 11, 2012, 3:00 AM CDT
- Expired
- Apr 11, 2012, 8:00 AM CDT
- In force
- 5 hr
- Issued by
- NWS Quad Cities, IA
All 36 counties
Benton County, IA, Buchanan County, IA, Cedar County, IA, Clinton County, IA, Delaware County, IA, Des Moines County, IA, Dubuque County, IA, Henry County, IA, Iowa County, IA, Jackson County, IA, Jefferson County, IA, Johnson County, IA, Jones County, IA, Keokuk County, IA, Lee County, IA, Linn County, IA, Louisa County, IA, Muscatine County, IA, Scott County, IA, Van Buren County, IA, Washington County, IA, Bureau County, IL, Carroll County, IL, Hancock County, IL, Henderson County, IL, Henry County, IL, Jo Daviess County, IL, McDonough County, IL, Mercer County, IL, Putnam County, IL, Rock Island County, IL, Stephenson County, IL, Warren County, IL, Whiteside County, IL, Clark County, MO, Scotland County, MO
The radar
The Quad Cities radar (KDVN), 41 km from the middle of the area, began a volume at 08:43 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, 8.6 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 3126 m above ground
- 0-6 km bulk shear
- 65 kt
- 0-1 km storm-relative helicity
- 92 m²/s²
- 0-3 km storm-relative helicity
- 207 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
671 WWUS73 KDVN 100837 NPWDVN URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE QUAD CITIES IA IL 337 AM CDT TUE APR 10 2012 ...BELOW FREEZING TEMPERATURES EARLY THIS MORNING AND AGAIN LATE TONIGHT... .HIGH PRESSURE WILL CONTINUE TO SLOWLY BUILD INTO THE REGION THROUGH WEDNESDAY. MOSTLY CLEAR SKIES... DRY AIR AND RELATIVELY LIGHT WINDS WILL ALLOW TEMPERATURES TO DROP BELOW FREEZING OVER PORTIONS OF NORTHEAST AND EAST CENTRAL IOWA AND NORTHWEST ILLINOIS EARLY THIS MORNING... AND OVER THE ENTIRE REGION TONIGHT. WINDS ARE EXPECTED TO BE AROUND 5 TO 10 MPH... WHICH WILL LIMIT FROST TO WELL SHELTERED OR LOW LYING AREAS. SENSITIVE VEGETATION AND FRUIT TREES WILL LIKELY BE DAMAGED FROM THESE TEMPERATURES IF NOT PROPERLY PROTECTED. ANOTHER COLD NIGHT...WITH FREEZING TEMPERATURES IS EXPECTED WEDNESDAY NIGHT AND EARLY THURSDAY. IAZ040>042-051>054-063>068-076-077-087-ILZ001-002-007-009-101845- /O.NEW.KDVN.FZ.W.0003.120411T0800Z-120411T1300Z/ /O.CON.KDVN.FZ.W.0002.120410T0900Z-120410T1300Z/ BUCHANAN-DELAWARE-DUBUQUE-BENTON-LINN-JONES-JACKSON-IOWA-JOHNSON- CEDAR-CLINTON-MUSCATINE-SCOTT-KEOKUK-WASHINGTON-JEFFERSON- JO DAVIESS-STEPHENSON-CARROLL-WHITESIDE- INCLUDING THE CITIES OF...INDEPENDENCE...MANCHESTER...DUBUQUE... VINTON...CEDAR RAPIDS...ANAMOSA...MAQUOKETA...MARENGO... IOWA CITY...TIPTON...CLINTON...MUSCATINE...BETTENDORF... DAVENPORT...SIGOURNEY...WASHINGTON...FAIRFIELD...GALENA... FREEPORT...MOUNT CARROLL...STERLING...ROCK FALLS 337 AM CDT TUE APR 10 2012 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 8 AM CDT THIS MORNING... ...FREEZE WARNING IN EFFECT FROM 3 AM TO 8 AM CDT WEDNESDAY... THE NATIONAL WEATHER SERVICE IN QUAD CITIES HAS ISSUED A FREEZE WARNING...WHICH IS IN EFFECT FROM 3 AM TO 8 AM CDT WEDNESDAY. * TIMING AND TEMPERATURE...TEMPERATURES WILL BOTTOM OUT IN THE MIDDLE 20S TO NEAR 30 DEGREES FOR SEVERAL HOURS EARLY THIS MORNING BEFORE QUICKLY WARMING ABOVE FREEZING AFTER SUNRISE. OVERNIGHT TEMPERATURES ARE EXPECTED TO FALL BELOW FREEZING AGAIN LATE TONIGHT INTO EARLY WEDNESDAY MORNING... WITH WIDESPREAD LOWS IN THE MIDDLE TO UPPER 20S WITH LOWER 20S POSSIBLE IN A FEW SHELTERED LOCATIONS. * IMPACTS...THE COLD TEMPERATURES WILL CAUSE DAMAGE TO SENSITIVE PLANTS AND FRUIT TREES. TAKE MEASURES TO PROTECT ANY COLD SENSITIVE VEGETATION TONIGHT AND EARLY TUESDAY MORNING. 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 THEM INDOORS FOR PROTECTION. 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. && $$ IAZ078-088-089-098-099-ILZ015>018-024>026-034-035-MOZ009-010- 101845- /O.NEW.KDVN.FZ.W.0003.120411T0800Z-120411T1300Z/ LOUISA-HENRY IA-DES MOINES-VAN BUREN-LEE-ROCK ISLAND-HENRY IL- BUREAU-PUTNAM-MERCER-HENDERSON-WARREN-HANCOCK-MCDONOUGH-SCOTLAND- CLARK- INCLUDING THE CITIES OF...WAPELLO...MOUNT PLEASANT...BURLINGTON... KEOSAUQUA....FORT MADISON...MOLINE...ROCK ISLAND...KEWANEE... PRINCETON...HENNEPIN...ALEDO...OQUAWKA...MONMOUTH...CARTHAGE... MACOMB...MEMPHIS...KAHOKA 337 AM CDT TUE APR 10 2012 ...FREEZE WARNING IN EFFECT FROM 3 AM TO 8 AM CDT WEDNESDAY... THE NATIONAL WEATHER SERVICE IN QUAD CITIES HAS ISSUED A FREEZE WARNING...WHICH IS IN EFFECT FROM 3 AM TO 8 AM CDT WEDNESDAY. * TIMING AND TEMPERATURE...TEMPERATURES ARE EXPECTED TO FALL INTO THE UPPER 20S TO NEAR 30 DEGREES FOR SEVERAL HOURS LATE TONIGHT. TEMPERATURES WILL QUICKLY WARM ABOVE FREEZING AFTER SUNRISE WEDNESDAY MORNING. * IMPACTS...THE COLD TEMPERATURES WILL CAUSE DAMAGE TO SENSITIVE PLANTS AND FRUIT TREES. TAKE MEASURES TO PROTECT ANY COLD SENSITIVE VEGETATION TONIGHT AND EARLY TUESDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT OR HIGHLY LIKELY. THESE CONDITIONS WILL KILL CROPS AND OTHER SENSITIVE VEGETATION. COVER SENSITIVE PLANTS OR BRING INDOORS FOR PROTECTION. && $$
6 follow-up statements
895 WWUS73 KDVN 101255 NPWDVN URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE QUAD CITIES IA IL 755 AM CDT TUE APR 10 2012 ...BELOW FREEZING TEMPERATURES LATE TONIGHT INTO EARLY WEDNESDAY... .HIGH PRESSURE WILL CONTINUE TO SLOWLY BUILD INTO THE REGION THROUGH WEDNESDAY. MOSTLY CLEAR SKIES... DRY AIR AND RELATIVELY LIGHT WINDS WILL ALLOW TEMPERATURES TO DROP BELOW FREEZING OVER THE ENTIRE REGION TONIGHT. A HARD FREEZE WITH LOWS IN THE LOWER TO MIDDLE 20S IS LIKELY FOR PORTIONS OF EASTERN IA AND NORTHWEST ILLINOIS. IN ADDITION... PATCHY TO AREAS OF FROST CAN BE EXPECTED ESPECIALLY IN SHELTERED OR LOW LYING AREAS. SENSITIVE VEGETATION AND FRUIT TREES WILL LIKELY BE DAMAGED FROM THESE TEMPERATURES IF NOT PROPERLY PROTECTED. ANOTHER COLD NIGHT...WITH FREEZING TEMPERATURES IS EXPECTED WEDNESDAY NIGHT AND EARLY THURSDAY. IAZ040>042-051>054-063>068-076-077-087-ILZ001-002-007-009-102300- /O.EXP.KDVN.FZ.W.0002.000000T0000Z-120410T1300Z/ /O.CON.KDVN.FZ.W.0003.120411T0800Z-120411T1300Z/ BUCHANAN-DELAWARE-DUBUQUE-BENTON-LINN-JONES-JACKSON-IOWA-JOHNSON- CEDAR-CLINTON-MUSCATINE-SCOTT-KEOKUK-WASHINGTON-JEFFERSON- JO DAVIESS-STEPHENSON-CARROLL-WHITESIDE- INCLUDING THE CITIES OF...INDEPENDENCE...MANCHESTER...DUBUQUE... VINTON...CEDAR RAPIDS...ANAMOSA...MAQUOKETA...MARENGO... IOWA CITY...TIPTON...CLINTON...MUSCATINE...BETTENDORF... DAVENPORT...SIGOURNEY...WASHINGTON...FAIRFIELD...GALENA... FREEPORT...MOUNT CARROLL...STERLING...ROCK FALLS 755 AM CDT TUE APR 10 2012 ...FREEZE WARNING REMAINS IN EFFECT FROM 3 AM TO 8 AM CDT WEDNESDAY... ...FREEZE WARNING WILL EXPIRE AT 8 AM CDT THIS MORNING... * TIMING AND TEMPERATURE...TEMPERATURES ARE QUICKLY WARMING THIS MORNING... THUS THE FREEZE WARNING WILL EXPIRE AT 8 AM CDT. TEMPERATURES ARE EXPECTED TO ONCE AGAIN FALL BELOW FREEZING LATE TONIGHT INTO EARLY WEDNESDAY. TEMPERATURES ARE EXPECTED TO BOTTOM OUT IN THE MIDDLE AND UPPER 20S FOR SEVERAL HOURS LATE TONIGHT...WITH LOWER 20S IN A FEW LOCATIONS. * IMPACTS...THE COLD TEMPERATURES WILL CAUSE DAMAGE TO SENSITIVE PLANTS AND FRUIT TREES. TAKE MEASURES TO PROTECT ANY COLD SENSITIVE VEGETATION TONIGHT AND EARLY TUESDAY MORNING. 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 THEM INDOORS FOR PROTECTION. 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. && $$ IAZ078-088-089-098-099-ILZ015>018-024>026-034-035-MOZ009-010- 102300- /O.CON.KDVN.FZ.W.0003.120411T0800Z-120411T1300Z/ LOUISA-HENRY IA-DES MOINES-VAN BUREN-LEE-ROCK ISLAND-HENRY IL- BUREAU-PUTNAM-MERCER-HENDERSON-WARREN-HANCOCK-MCDONOUGH-SCOTLAND- CLARK- INCLUDING THE CITIES OF...WAPELLO...MOUNT PLEASANT...BURLINGTON... KEOSAUQUA....FORT MADISON...MOLINE...ROCK ISLAND...KEWANEE... PRINCETON...HENNEPIN...ALEDO...OQUAWKA...MONMOUTH...CARTHAGE... MACOMB...MEMPHIS...KAHOKA 755 AM CDT TUE APR 10 2012 ...FREEZE WARNING REMAINS IN EFFECT FROM 3 AM TO 8 AM CDT WEDNESDAY... * TIMING AND TEMPERATURE...TEMPERATURES ARE EXPECTED TO FALL INTO THE UPPER 20S TO NEAR 30 DEGREES FOR SEVERAL HOURS LATE TONIGHT. TEMPERATURES WILL QUICKLY WARM ABOVE FREEZING AFTER SUNRISE WEDNESDAY MORNING. * IMPACTS...THE COLD TEMPERATURES WILL CAUSE DAMAGE TO SENSITIVE PLANTS AND FRUIT TREES. TAKE MEASURES TO PROTECT ANY COLD SENSITIVE VEGETATION TONIGHT AND EARLY TUESDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT OR HIGHLY LIKELY. THESE CONDITIONS WILL KILL CROPS AND OTHER SENSITIVE VEGETATION. COVER SENSITIVE PLANTS OR BRING INDOORS FOR PROTECTION. && $$
534 WWUS73 KDVN 101536 NPWDVN URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE QUAD CITIES IA IL 1036 AM CDT TUE APR 10 2012 ...BELOW FREEZING TEMPERATURES LATE TONIGHT INTO EARLY WEDNESDAY... .HIGH PRESSURE WILL CONTINUE TO SLOWLY BUILD INTO THE REGION THROUGH WEDNESDAY. MOSTLY CLEAR SKIES... DRY AIR AND RELATIVELY LIGHT WINDS WILL ALLOW TEMPERATURES TO DROP BELOW FREEZING OVER THE ENTIRE REGION TONIGHT. A HARD FREEZE WITH LOWS IN THE MIDDLE 20S TO UPPER 20S IS LIKELY FOR ALL OF EASTERN IA AND NORTHWEST AND WEST CENTRAL ILLINOIS...AS WELL AS NORTHEAST MISSOURI. IN ADDITION... PATCHY TO AREAS OF FROST CAN BE EXPECTED ESPECIALLY IN SHELTERED OR LOW LYING AREAS. SENSITIVE VEGETATION AND FRUIT TREES WILL LIKELY BE DAMAGED FROM THESE TEMPERATURES IF NOT PROPERLY PROTECTED. ANOTHER COLD NIGHT...WITH FREEZING OR NEAR FREEZING TEMPERATURES IS EXPECTED WEDNESDAY NIGHT AND EARLY THURSDAY. IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007- 009-015>018-024>026-034-035-MOZ009-010-110145- /O.CON.KDVN.FZ.W.0003.120411T0800Z-120411T1300Z/ BUCHANAN-DELAWARE-DUBUQUE-BENTON-LINN-JONES-JACKSON-IOWA-JOHNSON- CEDAR-CLINTON-MUSCATINE-SCOTT-KEOKUK-WASHINGTON-LOUISA-JEFFERSON- HENRY IA-DES MOINES-VAN BUREN-LEE-JO DAVIESS-STEPHENSON-CARROLL- WHITESIDE-ROCK ISLAND-HENRY IL-BUREAU-PUTNAM-MERCER-HENDERSON- WARREN-HANCOCK-MCDONOUGH-SCOTLAND-CLARK- INCLUDING THE CITIES OF...INDEPENDENCE...MANCHESTER...DUBUQUE... VINTON...CEDAR RAPIDS...ANAMOSA...MAQUOKETA...MARENGO... IOWA CITY...TIPTON...CLINTON...MUSCATINE...BETTENDORF... DAVENPORT...SIGOURNEY...WASHINGTON...WAPELLO...FAIRFIELD... MOUNT PLEASANT...BURLINGTON...KEOSAUQUA....FORT MADISON... GALENA...FREEPORT...MOUNT CARROLL...STERLING...ROCK FALLS... MOLINE...ROCK ISLAND...KEWANEE...PRINCETON...HENNEPIN...ALEDO... OQUAWKA...MONMOUTH...CARTHAGE...MACOMB...MEMPHIS...KAHOKA 1036 AM CDT TUE APR 10 2012 ...FREEZE WARNING REMAINS IN EFFECT FROM 3 AM TO 8 AM CDT WEDNESDAY... * TIMING AND TEMPERATURE...TEMPERATURES ARE EXPECTED TO ONCE AGAIN FALL BELOW FREEZING LATE TONIGHT INTO EARLY WEDNESDAY. TEMPERATURES ARE EXPECTED TO BOTTOM OUT IN THE MIDDLE AND UPPER 20S FOR SEVERAL HOURS LATE TONIGHT...WITH LOWER 20S IN A FEW LOCATIONS. TEMPERATURES WILL BE BELOW FREEZING FOR SEVERAL HOURS...OVER A VERY WIDESPREAD AREA. * IMPACTS...THE COLD TEMPERATURES WILL CAUSE DAMAGE TO SENSITIVE PLANTS AND FRUIT TREES. TAKE MEASURES TO PROTECT ANY COLD SENSITIVE VEGETATION TONIGHT AND EARLY TUESDAY MORNING. 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 THEM INDOORS FOR PROTECTION. && $$
645 WWUS73 KDVN 102012 NPWDVN URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE QUAD CITIES IA IL 312 PM CDT TUE APR 10 2012 ...BELOW FREEZING TEMPERATURES LATE TONIGHT INTO EARLY WEDNESDAY... .HIGH PRESSURE WILL CONTINUE TO SLOWLY BUILD INTO THE REGION THROUGH WEDNESDAY. MOSTLY CLEAR SKIES... DRY AIR AND RELATIVELY LIGHT WINDS WILL ALLOW TEMPERATURES TO DROP BELOW FREEZING OVER THE ENTIRE REGION TONIGHT. A HARD FREEZE WITH LOWS IN THE MIDDLE 20S TO UPPER 20S IS LIKELY FOR ALL OF EASTERN IA AND NORTHWEST AND WEST CENTRAL ILLINOIS...AS WELL AS NORTHEAST MISSOURI. LOCATIONS IN EASTERN IOWA ALONG THE WAPSIPINICON VALLEY MAY SEE LOWS IN THE LOWER 20S OVERNIGHT. IN ADDITION... PATCHY TO AREAS OF FROST CAN BE EXPECTED ESPECIALLY IN SHELTERED OR LOW LYING AREAS. SENSITIVE VEGETATION AND FRUIT TREES WILL LIKELY BE DAMAGED FROM THESE TEMPERATURES IF NOT PROPERLY PROTECTED. ANOTHER COLD NIGHT...WITH FREEZING OR NEAR FREEZING TEMPERATURES IS EXPECTED WEDNESDAY NIGHT AND EARLY THURSDAY. IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007- 009-015>018-024>026-034-035-MOZ009-010-110615- /O.CON.KDVN.FZ.W.0003.120411T0800Z-120411T1300Z/ BUCHANAN-DELAWARE-DUBUQUE-BENTON-LINN-JONES-JACKSON-IOWA-JOHNSON- CEDAR-CLINTON-MUSCATINE-SCOTT-KEOKUK-WASHINGTON-LOUISA-JEFFERSON- HENRY IA-DES MOINES-VAN BUREN-LEE-JO DAVIESS-STEPHENSON-CARROLL- WHITESIDE-ROCK ISLAND-HENRY IL-BUREAU-PUTNAM-MERCER-HENDERSON- WARREN-HANCOCK-MCDONOUGH-SCOTLAND-CLARK- INCLUDING THE CITIES OF...INDEPENDENCE...MANCHESTER...DUBUQUE... VINTON...CEDAR RAPIDS...ANAMOSA...MAQUOKETA...MARENGO... IOWA CITY...TIPTON...CLINTON...MUSCATINE...BETTENDORF... DAVENPORT...SIGOURNEY...WASHINGTON...WAPELLO...FAIRFIELD... MOUNT PLEASANT...BURLINGTON...KEOSAUQUA....FORT MADISON... GALENA...FREEPORT...MOUNT CARROLL...STERLING...ROCK FALLS... MOLINE...ROCK ISLAND...KEWANEE...PRINCETON...HENNEPIN...ALEDO... OQUAWKA...MONMOUTH...CARTHAGE...MACOMB...MEMPHIS...KAHOKA 312 PM CDT TUE APR 10 2012 ...FREEZE WARNING REMAINS IN EFFECT FROM 3 AM TO 8 AM CDT WEDNESDAY... * TIMING AND TEMPERATURE...TEMPERATURES ARE EXPECTED TO ONCE AGAIN FALL BELOW FREEZING LATE TONIGHT INTO EARLY WEDNESDAY. TEMPERATURES ARE EXPECTED TO BOTTOM OUT IN THE MIDDLE AND UPPER 20S FOR SEVERAL HOURS LATE TONIGHT...WITH LOWER 20S IN A FEW LOCATIONS. TEMPERATURES WILL BE BELOW FREEZING FOR SEVERAL HOURS...OVER A VERY WIDESPREAD AREA. * IMPACTS...THE COLD TEMPERATURES WILL CAUSE DAMAGE TO SENSITIVE PLANTS AND FRUIT TREES. TAKE MEASURES TO PROTECT ANY COLD SENSITIVE VEGETATION TONIGHT AND EARLY TUESDAY MORNING. 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 THEM INDOORS FOR PROTECTION. && $$ ERVIN
293 WWUS73 KDVN 110138 NPWDVN URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE QUAD CITIES IA IL 838 PM CDT TUE APR 10 2012 ...BELOW FREEZING TEMPERATURES LATE TONIGHT INTO EARLY WEDNESDAY... .HIGH PRESSURE WILL CONTINUE TO SLOWLY BUILD INTO THE REGION THROUGH WEDNESDAY. MOSTLY CLEAR SKIES... DRY AIR AND RELATIVELY LIGHT WINDS WILL ALLOW TEMPERATURES TO DROP BELOW FREEZING OVER THE ENTIRE REGION TONIGHT. A HARD FREEZE WITH LOWS IN THE MIDDLE 20S TO UPPER 20S IS LIKELY FOR ALL OF EASTERN IA AND NORTHWEST AND WEST CENTRAL ILLINOIS...AS WELL AS NORTHEAST MISSOURI. LOCATIONS IN EASTERN IOWA ALONG THE WAPSIPINICON VALLEY MAY SEE LOWS IN THE LOWER 20S OVERNIGHT. IN ADDITION... PATCHY TO AREAS OF FROST CAN BE EXPECTED ESPECIALLY IN SHELTERED OR LOW LYING AREAS. SENSITIVE VEGETATION AND FRUIT TREES WILL LIKELY BE DAMAGED FROM THESE TEMPERATURES IF NOT PROPERLY PROTECTED. ANOTHER COLD NIGHT...WITH FREEZING OR NEAR FREEZING TEMPERATURES IS EXPECTED WEDNESDAY NIGHT AND EARLY THURSDAY. IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007- 009-015>018-024>026-034-035-MOZ009-010-111145- /O.CON.KDVN.FZ.W.0003.120411T0800Z-120411T1300Z/ BUCHANAN-DELAWARE-DUBUQUE-BENTON-LINN-JONES-JACKSON-IOWA-JOHNSON- CEDAR-CLINTON-MUSCATINE-SCOTT-KEOKUK-WASHINGTON-LOUISA-JEFFERSON- HENRY IA-DES MOINES-VAN BUREN-LEE-JO DAVIESS-STEPHENSON-CARROLL- WHITESIDE-ROCK ISLAND-HENRY IL-BUREAU-PUTNAM-MERCER-HENDERSON- WARREN-HANCOCK-MCDONOUGH-SCOTLAND-CLARK- INCLUDING THE CITIES OF...INDEPENDENCE...MANCHESTER...DUBUQUE... VINTON...CEDAR RAPIDS...ANAMOSA...MAQUOKETA...MARENGO... IOWA CITY...TIPTON...CLINTON...MUSCATINE...BETTENDORF... DAVENPORT...SIGOURNEY...WASHINGTON...WAPELLO...FAIRFIELD... MOUNT PLEASANT...BURLINGTON...KEOSAUQUA....FORT MADISON... GALENA...FREEPORT...MOUNT CARROLL...STERLING...ROCK FALLS... MOLINE...ROCK ISLAND...KEWANEE...PRINCETON...HENNEPIN...ALEDO... OQUAWKA...MONMOUTH...CARTHAGE...MACOMB...MEMPHIS...KAHOKA 838 PM CDT TUE APR 10 2012 ...FREEZE WARNING REMAINS IN EFFECT FROM 3 AM TO 8 AM CDT WEDNESDAY... * TIMING AND TEMPERATURE...TEMPERATURES ARE EXPECTED TO ONCE AGAIN FALL BELOW FREEZING LATE TONIGHT INTO EARLY WEDNESDAY. TEMPERATURES ARE EXPECTED TO BOTTOM OUT IN THE MIDDLE AND UPPER 20S FOR SEVERAL HOURS LATE TONIGHT...WITH LOWER 20S IN A FEW LOCATIONS. TEMPERATURES WILL BE BELOW FREEZING FOR SEVERAL HOURS...OVER A VERY WIDESPREAD AREA. * IMPACTS...THE COLD TEMPERATURES WILL CAUSE DAMAGE TO SENSITIVE PLANTS AND FRUIT TREES. TAKE MEASURES TO PROTECT ANY COLD SENSITIVE VEGETATION TONIGHT AND EARLY TUESDAY MORNING. 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 THEM INDOORS FOR PROTECTION. && $$
382 WWUS73 KDVN 110846 NPWDVN URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE QUAD CITIES IA IL 346 AM CDT WED APR 11 2012 ...FREEZING TEMPERATURES EARLY THIS MORNING AND AGAIN TONIGHT INTO EARLY THURSDAY MORNING... .TEMPERATURES WILL DROP AT OR BELOW FREEZING EARLY THIS MORNING... AND AGAIN TONIGHT INTO EARLY THURSDAY MORNING. NEAR CALM WINDS FOR MUCH OF TONIGHT WILL ALLOW LOW LEVEL MOISTURE TO POOL... RESULTING IN WIDESPREAD FROST. SENSITIVE VEGETATION AND FRUIT TREES WILL LIKELY BE DAMAGED FROM THESE TEMPERATURES IF NOT PROPERLY PROTECTED. IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007- 009-015>018-024>026-034-035-MOZ009-010-111900- /O.NEW.KDVN.FZ.W.0004.120412T0400Z-120412T1300Z/ /O.CON.KDVN.FZ.W.0003.000000T0000Z-120411T1300Z/ BUCHANAN-DELAWARE-DUBUQUE-BENTON-LINN-JONES-JACKSON-IOWA-JOHNSON- CEDAR-CLINTON-MUSCATINE-SCOTT-KEOKUK-WASHINGTON-LOUISA-JEFFERSON- HENRY IA-DES MOINES-VAN BUREN-LEE-JO DAVIESS-STEPHENSON-CARROLL- WHITESIDE-ROCK ISLAND-HENRY IL-BUREAU-PUTNAM-MERCER-HENDERSON- WARREN-HANCOCK-MCDONOUGH-SCOTLAND-CLARK- INCLUDING THE CITIES OF...INDEPENDENCE...MANCHESTER...DUBUQUE... VINTON...CEDAR RAPIDS...ANAMOSA...MAQUOKETA...MARENGO... IOWA CITY...TIPTON...CLINTON...MUSCATINE...BETTENDORF... DAVENPORT...SIGOURNEY...WASHINGTON...WAPELLO...FAIRFIELD... MOUNT PLEASANT...BURLINGTON...KEOSAUQUA....FORT MADISON... GALENA...FREEPORT...MOUNT CARROLL...STERLING...ROCK FALLS... MOLINE...ROCK ISLAND...KEWANEE...PRINCETON...HENNEPIN...ALEDO... OQUAWKA...MONMOUTH...CARTHAGE...MACOMB...MEMPHIS...KAHOKA 346 AM CDT WED APR 11 2012 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 8 AM CDT THIS MORNING... ...FREEZE WARNING IN EFFECT FROM 11 PM THIS EVENING TO 8 AM CDT THURSDAY... THE NATIONAL WEATHER SERVICE IN QUAD CITIES HAS ISSUED A FREEZE WARNING...WHICH IS IN EFFECT FROM 11 PM THIS EVENING TO 8 AM CDT THURSDAY. * TIMING AND TEMPERATURE...TEMPERATURES WILL FALL AT OR BELOW FREEZING EARLY THIS MORNING... AND AGAIN TONIGHT INTO EARLY THURSDAY MORNING. LOWS WILL RANGE FROM THE MIDDLE 20S TO AROUND 30 DEGREES... WITH LOWER 20S IN A FEW LOCATIONS OVER NORTHEAST IOWA EARLY THIS MORNING. * IMPACTS...THE COLD TEMPERATURES WILL CAUSE DAMAGE TO SENSITIVE PLANTS AND FRUIT TREES. TAKE MEASURES TO PROTECT ANY COLD SENSITIVE VEGETATION TONIGHT AND EARLY TUESDAY MORNING. 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. && $$
673 WWUS73 KDVN 111252 NPWDVN URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE QUAD CITIES IA IL 752 AM CDT WED APR 11 2012 ...FREEZING TEMPERATURES AGAIN TONIGHT INTO EARLY THURSDAY MORNING... .TEMPERATURES WILL DROP AT OR BELOW FREEZING AGAIN TONIGHT INTO EARLY THURSDAY MORNING... WITH LIGHT WINDS ALLOWING FOR WIDESPREAD FROST. SENSITIVE VEGETATION AND FRUIT TREES WILL LIKELY BE DAMAGED FROM THESE TEMPERATURES IF NOT PROPERLY PROTECTED. IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007- 009-015>018-024>026-034-035-MOZ009-010-112300- /O.EXP.KDVN.FZ.W.0003.000000T0000Z-120411T1300Z/ /O.CON.KDVN.FZ.W.0004.120412T0400Z-120412T1300Z/ BUCHANAN-DELAWARE-DUBUQUE-BENTON-LINN-JONES-JACKSON-IOWA-JOHNSON- CEDAR-CLINTON-MUSCATINE-SCOTT-KEOKUK-WASHINGTON-LOUISA-JEFFERSON- HENRY IA-DES MOINES-VAN BUREN-LEE-JO DAVIESS-STEPHENSON-CARROLL- WHITESIDE-ROCK ISLAND-HENRY IL-BUREAU-PUTNAM-MERCER-HENDERSON- WARREN-HANCOCK-MCDONOUGH-SCOTLAND-CLARK- INCLUDING THE CITIES OF...INDEPENDENCE...MANCHESTER...DUBUQUE... VINTON...CEDAR RAPIDS...ANAMOSA...MAQUOKETA...MARENGO... IOWA CITY...TIPTON...CLINTON...MUSCATINE...BETTENDORF... DAVENPORT...SIGOURNEY...WASHINGTON...WAPELLO...FAIRFIELD... MOUNT PLEASANT...BURLINGTON...KEOSAUQUA....FORT MADISON... GALENA...FREEPORT...MOUNT CARROLL...STERLING...ROCK FALLS... MOLINE...ROCK ISLAND...KEWANEE...PRINCETON...HENNEPIN...ALEDO... OQUAWKA...MONMOUTH...CARTHAGE...MACOMB...MEMPHIS...KAHOKA 752 AM CDT WED APR 11 2012 ...FREEZE WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING TO 8 AM CDT THURSDAY... ...FREEZE WARNING WILL EXPIRE AT 8 AM CDT THIS MORNING... * TIMING AND TEMPERATURE...TEMPERATURES WILL FALL AT OR BELOW FREEZING AGAIN TONIGHT INTO EARLY THURSDAY MORNING. LOWS WILL RANGE FROM THE MIDDLE 20S TO AROUND 30 DEGREES. * IMPACTS...THE COLD TEMPERATURES WILL CAUSE DAMAGE TO SENSITIVE PLANTS AND FRUIT TREES. TAKE MEASURES TO PROTECT ANY COLD SENSITIVE VEGETATION TONIGHT AND EARLY TUESDAY MORNING. 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. && $$
What forecasters said that day
The local office's own words before this freeze warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Quad Cities, IA wrote its last area forecast discussion before this freeze warning went out at Apr 10, 3:07 AM CDT, 30 minutes earlier.
Area forecast discussion, Apr 10, 3:07 AM CDT, 30 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
307 AM CDT TUE APR 10 2012
.SYNOPSIS...
00Z SUBJECTIVE UPPER AIR ANALYSIS AND WATER VAPOR IMAGERY REVEAL
HIGH AMPLITUDE YET SOMEWHAT STAGNAT PATTERN PREVAILING OVER THE
CONUS. DEEP CYCLONE SHOWN RETROGRADING THROUGH QUEBEC WITH
SECONDARY ENERGY CENTERS SLIDING SWD ON BACKSIDE OF CYCLONE
THROUGH WESTERN ONTARIO AND EASTERN SASKATCHEWAN PROVINCES.
MEANWHILE... LARGE UPPER TROUGH WAS POSITIONED JUST OFFSHORE OF
WEST COAST EARLY THIS AM. OUR REGION RESIDES IN DEEP... DRY
NORTHWEST FLOW. AT THE SFC... LARGE CANADIAN ANTICYCLONE CENTERED
OVER NORTHERN SASKATCHEWAN WITH RIDGE AXIS EXTENDING THROUGH THE
NORTHERN PLAINS AND MISSOURI RIVER VALLEY. TEMPS AT 2 AM STARTING
TO SLIP BELOW FREEZING IN NW CWA WITH DRY AIR AND WINDS DROPPING
OFF TO AROUND 5 KTS. 05
&&
.SHORT TERM...TODAY AND TONIGHT...
FAIRLY QUIET CONDITIONS AS SFC HIGH PRESSURE RIDGE WILL CONTINUE
TO DOMINATE. MAIN CONCERN IS FOCUSED ON LOW TEMPS TNGT... AND
FROST AND FREEZE... WITH HARD FREEZE LIKELY IN SOME AREAS TNGT.
FOR TODAY... MODELS SHOW ANOTHER DAY OF DEEP MIXING WITH NAM/GFS
BUFR SOUNDINGS SUPPORTIVE OF MIXING TO NEAR 775 MB. THIS WILL
YIELD GENERAL RANGE ON HIGHS FROM NEAR 50F TO NEAR 60F... WITH
GUSTY NORTHWEST WINDS 20-30+ MPH. EXPECT FEW-SCT DIURNAL CUMULUS
THIS AFTN.
TONIGHT... MAINLY CLEAR SKIES WITH INCREASING SUBSIDENCE AS SFC
RIDGE AXIS NUDGES CLOSER TO CWA. STILL ENOUGH OF A PRESSURE
GRADIENT SHOWN TO SUPPORT WINDS 3-6 KTS KEEPING BL JUST ENOUGH
MIXED AND DRY ADVECTING... WHICH BOTH MAY KEEP FROST THREAT AT
BAY OR LIMIT TO SHELTERED OR LOW LYING AREAS. THE DRY AIR AND
LIGHTER WINDS WILL HOWEVER BRING A GREATER RISK OF SUB-FREEZING
TEMPS WITH HARD FREEZE LIKELY ESPECIALLY N/W SECTIONS WITH
GENERAL RANGE ON LOWS FROM 25F TO 31F. FREEZE WARNING ISSUED
FOR ALL AREAS. MIN TEMP TECHNIQUE USING PROGGED 850 MB TEMP 12Z
WED AND STRENGTH OF INVERSION WOULD SUGGEST POTENTIAL FOR COLDER
LOWS OF 20-24F ESPECIALLY IN SHELTERED AND LOW LYING AREAS N/W IF
WINDS WERE TO GO CALM FOR ANY DURATION. 05
.LONG TERM...WEDNESDAY THROUGH NEXT MONDAY...
FREEZE HEADLINES WILL PROBABLY BE NEEDED AGAIN LATE WED NIGHT AND
EARLY THURS MORNING.
HIGH PRESSURE MOVES SLOWLY ACROSS THE AREA WEDNESDAY/WED NIGHT
KEEPING QUIET AND DRY CONDITIONS ACROSS THE AREA. THE HIGH SHOULD BE
RIGHT OVER THE CWFA AT SUNSET AND THE LIGHT WINDS COMBINED WITH THE
DRY ATMOSPHERE WILL ALLOW TEMPERATURES TO DROP QUICKLY DURING THE
EVENING. RETURN FLOW DEVELOPING AFTER MIDNIGHT WILL BRING SLIGHTLY
MORE MOIST AIR INTO THE AREA. BASED ON FCST MIN TEMPERATURES ANOTHER
FREEZE LOOKS TO BE IN STORE FOR MUCH OF THE AREA. THE LIGHT WINDS
WED NIGHT SUGGESTS THERE MAY BE A GREATER FROST THREAT COMPARED TO
THE PREVIOUS TWO NIGHTS.
RETURN FLOW DEVELOPS ON THURSDAY WITH THE MORNING HOURS BEING DRY.
THE QUESTION TURNS TO THE AFTERNOON. THERE ARE DISAGREEMENTS AMONG
THE MODELS AS TO HOW FAST THE RETURN MOISTURE AND THUS PRECIPITATION
CHANCES WILL GET INTO THE AREA. THE MODELS SHOW A RESPECTABLE THETA
E GRADIENT WEST OF THE AREA THAT BEGINS MOVING INTO THE WESTERN CWFA
AROUND SUNSET THURSDAY. THUS WILL KEEP MOST OF THE AREA DRY DURING
THE AFTERNOON EXCEPT FOR SCHC POPS IN THE FAR WEST VERY LATE IN THE
AFTERNOON.
SAID THETA E GRADIENT WORKS ACROSS THE CWFA THURSDAY NIGHT WITH A
RESPECTABLE LLJ STARTING TO VEER INTO THE REGION. MOISTURE IS STILL
IN QUESTION BUT SCHC/CHC POPS THURSDAY EVENING BECOMING CHC POPS
AFTER MIDNIGHT LOOKS REASONABLE FOR NOW. TSRA CHANCES SHOULD BE
CONFINED TO THE WESTERN PART OF THE CWFA WHERE THE BETTER MOISTURE
WILL RESIDE.
FRIDAY ON...
MODEL CONSENSUS POINTS TO AN ACTIVE WX PATTERN FROM FRIDAY THROUGH
NEXT MONDAY. GIVEN THE TIMING DIFFERENCES THE CHC POPS FOR FRIDAY
LOOKS REASONABLE. LIKELY POPS FOR FRIDAY NIGHT THROUGH SATURDAY
NIGHT WILL PROBABLY NEED TO BE RAISED OVER TIME ONCE THE MODELS
SOLUTIONS CONVERGE ON WHEN THE MAIN SFC WAVE MOVES THROUGH THE
REGION. CHC POPS FOR SUNDAY/SUN NIGHT LOOK REASONABLE GIVEN THE
TIMING DIFFERENCES BETWEEN THE MODELS ON THE FOLLOWING SFC WAVE. THE
STRENGTH OF THE HIGH BUILDING SOUTH FROM CANADA ON MONDAY VARIES
BETWEEN THE MODELS. THUS THE CURRENT SCHC/CHC POPS LOOK REASONABLE
FOR NOW. 08
&&
.AVIATION... /ISSUED 1217 AM CDT TUE APR 10 2012/
VFR WX WILL BE SEEN THROUGH 12Z/11 AS HIGH PRESSURE BUILDS INTO
THE MIDWEST. DEEP MIXING WILL AGAIN DVLP AFT 15Z/10 PRODUCING
GUSTY WINDS. AFT 00Z/11 WINDS WILL DIMINISH AS SUNSET. 08
&&
.DVN WATCHES/WARNINGS/ADVISORIES...
IA...FREEZE WARNING UNTIL 8 AM CDT THIS MORNING FOR BENTON-BUCHANAN-
CEDAR-CLINTON-DELAWARE-DUBUQUE-IOWA-JACKSON-JEFFERSON-
JOHNSON-JONES-KEOKUK-LINN-MUSCATINE-SCOTT-WASHINGTON.
FREEZE WARNING FROM 3 AM TO 8 AM CDT WEDNESDAY FOR BENTON-
BUCHANAN-CEDAR-CLINTON-DELAWARE-DES MOINES-DUBUQUE-HENRY IA-
IOWA-JACKSON-JEFFERSON-JOHNSON-JONES-KEOKUK-LEE-LINN-LOUISA-
MUSCATINE-SCOTT-VAN BUREN-WASHINGTON.
IL...FREEZE WARNING UNTIL 8 AM CDT THIS MORNING FOR CARROLL-JO
DAVIESS-STEPHENSON-WHITESIDE.
FREEZE WARNING FROM 3 AM TO 8 AM CDT WEDNESDAY FOR BUREAU-
CARROLL-HANCOCK-HENDERSON-HENRY IL-JO DAVIESS-MCDONOUGH-
MERCER-PUTNAM-ROCK ISLAND-STEPHENSON-WARREN-WHITESIDE.
MO...FREEZE WARNING FROM 3 AM TO 8 AM CDT WEDNESDAY FOR CLARK-
SCOTLAND.
&&
05/08Hazardous weather outlook, Apr 9, 4:43 AM CDT, 22 hours 54 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE QUAD CITIES IA IL 443 AM CDT MON APR 9 2012 IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007- 009-015>018-024>026-034-035-MOZ009-010-100945- BUCHANAN-DELAWARE-DUBUQUE-BENTON-LINN-JONES-JACKSON-IOWA-JOHNSON- CEDAR-CLINTON-MUSCATINE-SCOTT-KEOKUK-WASHINGTON-LOUISA-JEFFERSON- HENRY IA-DES MOINES-VAN BUREN-LEE-JO DAVIESS-STEPHENSON-CARROLL- WHITESIDE-ROCK ISLAND-HENRY IL-BUREAU-PUTNAM-MERCER-HENDERSON- WARREN-HANCOCK-MCDONOUGH-SCOTLAND-CLARK- 443 AM CDT MON APR 9 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL ILLINOIS...NORTHWEST ILLINOIS...WEST CENTRAL ILLINOIS...EAST CENTRAL IOWA...NORTHEAST IOWA...SOUTHEAST IOWA AND NORTHEAST MISSOURI. .DAY ONE...TODAY AND TONIGHT BREEZY CONDITIONS COMBINED WITH LOW HUMIDITY LEVELS MAY RESULT IN AN ENHANCED FIRE RISK THIS AFTERNOON. A FREEZE WARNING IS IN EFFECT FOR LATE TONIGHT ROUGHLY ALONG AND NORTHWEST OF A IOWA CITY... IOWA TO FREEPORT... ILLINOIS LINE WHERE SUB FREEZING TEMPERATURES AND THE POTENTIAL FOR A HARD FREEZE WILL POSE A SIGNIFICANT RISK TO ANY SENSITIVE VEGETATION OUTDOORS. A FREEZE WATCH IS IN EFFECT FOR ADJACENT AREAS TO THE SOUTHEAST OF THE WARNING FOR THE POTENTIAL OF PATCHY FROST AND A PERIOD OF FREEZING TEMPERATURES LATE TONIGHT. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY SUB FREEZING TEMPERATURES... AND PATCHY TO AREAS OF FROST IS EXPECTED LATE TUESDAY NIGHT AND EARLY WEDNESDAY MORNING. LOW TEMPERATURES AS COLD AS THE MIDDLE AND UPPER 20S MAY RESULT IN A HARD FREEZE OVER MUCH OF THE OUTLOOK AREA. PATCHY FROST AND FREEZING TEMPERATURES WILL BE POSSIBLE AGAIN WEDNESDAY NIGHT. THERE IS A CHANCE OF THUNDERSTORMS OVER THE OUTLOOK AREA FRIDAY THROUGH SUNDAY. THE POTENTIAL FOR SEVERE WEATHER APPEARS LOW AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT.
Nearby
Freeze Warnings in Iowa, 2012Freeze Warnings in Illinois, 2012Freeze Warnings in Missouri, 2012Every freeze warning 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.