Alert archive / Illinois / Red Flag Warnings in 2012
Red Flag Warning 9, NWS Chicago, IL
NWS Chicago, IL issued this red flag warning at May 29, 2012, 3:13 AM CDT for Lake County, Indiana; 8 counties in Illinois. It took effect at May 29, 2012, 1:00 PM CDT. It was in force for 7 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
- May 29, 2012, 3:13 AM CDT (08:13 UTC)
- In effect from
- May 29, 2012, 1:00 PM CDT
- Expired
- May 29, 2012, 8:00 PM CDT
- In force
- 7 hr
- Issued by
- NWS Chicago, IL
Counties Cook County, IL, DeKalb County, IL, DuPage County, IL, Kane County, IL, Kendall County, IL, Lee County, IL, Ogle County, IL, Will County, IL, Lake County, IN
The radar
The Chicago radar (KLOT), 30 km from the middle of the area, began a volume at 08:15 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, 8.2 hours before the alert went out and 178 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
- 795 J/kg
- Mixed-layer CIN
- -98 J/kg
- Mixed-layer LCL
- 1457 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- -47 m²/s²
- 0-3 km storm-relative helicity
- 21 m²/s²
- Significant tornado parameter
- -0.1
- Supercell composite
- -1.5
The text
As transmitted, in the capitals the NWS used until 2016.
411 WWUS83 KLOT 290813 RFWLOT URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE CHICAGO IL 313 AM CDT TUE MAY 29 2012 ILZ008-010>014-020-022-INZ001-291615- /O.NEW.KLOT.FW.W.0009.120529T1800Z-120530T0100Z/ OGLE-LEE-DE KALB-KANE-DUPAGE-COOK-KENDALL-WILL-LAKE IN- 313 AM CDT TUE MAY 29 2012 ...RED FLAG WARNING IN EFFECT FROM 1 PM THIS AFTERNOON TO 8 PM CDT THIS EVENING... THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A RED FLAG WARNING FOR STRONG WINDS...LOW RELATIVE HUMIDITY...AND ABNORMALLY DRY CONDITIONS...WHICH IS IN EFFECT FROM 1 PM THIS AFTERNOON TO 8 PM CDT THIS EVENING. * AFFECTED AREA...PORTIONS OF NORTHERN ILLINOIS AS WELL AS LAKE COUNTY INDIANA. * 20FT WINDS...WEST 15 TO 20 MPH WITH GUSTS UP TO 30 MPH. * TIMING...THE STRONGEST WINDS AND LOWEST RELATIVE HUMIDITY VALUES ARE EXPECTED THIS AFTERNOON. * RELATIVE HUMIDITY...AS LOW AS 20 TO 25 PERCENT. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING NOW...OR WILL SHORTLY. A COMBINATION OF STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES WILL CREATE EXPLOSIVE FIRE GROWTH POTENTIAL. && $$ IZZI
3 follow-up statements
754 WWUS83 KLOT 291522 RFWLOT URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE CHICAGO IL 1022 AM CDT TUE MAY 29 2012 ILZ008-010>014-020-022-INZ001-292330- /O.CON.KLOT.FW.W.0009.120529T1800Z-120530T0100Z/ OGLE-LEE-DE KALB-KANE-DUPAGE-COOK-KENDALL-WILL-LAKE IN- 1022 AM CDT TUE MAY 29 2012 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM CDT THIS EVENING... * AFFECTED AREA...PORTIONS OF NORTHERN ILLINOIS AS WELL AS LAKE COUNTY INDIANA. * 20FT WINDS...WEST 15 TO 20 MPH WITH GUSTS UP TO 30 MPH. * TIMING...THE STRONGEST WINDS AND LOWEST RELATIVE HUMIDITY VALUES ARE EXPECTED THIS AFTERNOON. * RELATIVE HUMIDITY...AS LOW AS 20 TO 25 PERCENT. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING NOW...OR WILL SHORTLY. A COMBINATION OF STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES WILL CREATE EXPLOSIVE FIRE GROWTH POTENTIAL. && $$
723 WWUS83 KLOT 292054 RFWLOT URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE CHICAGO IL 354 PM CDT TUE MAY 29 2012 ILZ008-010>014-020-022-INZ001-300100- /O.CON.KLOT.FW.W.0009.000000T0000Z-120530T0100Z/ OGLE-LEE-DE KALB-KANE-DUPAGE-COOK-KENDALL-WILL-LAKE IN- 354 PM CDT TUE MAY 29 2012 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM CDT THIS EVENING... * AFFECTED AREA...PORTIONS OF NORTHERN ILLINOIS AS WELL AS LAKE COUNTY INDIANA. * 20FT WINDS...WEST 15 TO 20 MPH WITH GUSTS UP TO 30 MPH. * TIMING...THE STRONGEST WINDS AND LOWEST RELATIVE HUMIDITY VALUES ARE EXPECTED THIS AFTERNOON. * RELATIVE HUMIDITY...AS LOW AS 20 TO 25 PERCENT. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING NOW...OR WILL SHORTLY. A COMBINATION OF STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES WILL CREATE EXPLOSIVE FIRE GROWTH POTENTIAL. && $$ BEACHLER
325 WWUS83 KLOT 300045 RFWLOT URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE CHICAGO IL 745 PM CDT TUE MAY 29 2012 ...DANGEROUS FIRE WEATHER CONDITIONS EASING... ILZ008-010>014-020-022-INZ001-300145- /O.EXP.KLOT.FW.W.0009.000000T0000Z-120530T0100Z/ OGLE-LEE-DE KALB-KANE-DUPAGE-COOK-KENDALL-WILL-LAKE IN- 745 PM CDT TUE MAY 29 2012 ...RED FLAG WARNING WILL EXPIRE AT 8 PM CDT THIS EVENING... WIND SPEEDS HAVE DIMINISHED EARLY THIS EVENING AND HUMIDITY IS GRADUALLY INCREASING...ALLOWING FOR LESS OF A FIRE DANGER CONCERN. THUS...THE RED FLAG WARNING IN EFFECT FOR PART OF NORTHERN ILLINOIS WILL BE ALLOWED TO EXPIRE. $$
The office that day
Everything else NWS Chicago, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 28, 7:14 PM CDT | Special Weather Statement | LOT | Lee | 31 min |
| May 28, 7:22 PM CDT | Special Weather Statement | LOT | Cook | 23 min |
| May 28, 7:58 PM CDT | Special Weather Statement | LOT | LaSalle | 47 min |
| May 28, 9:49 PM CDT | Special Weather Statement | LOT | LaSalle | 41 min |
| May 29, 3:18 AM CDT | Small Craft Advisory | LOT | 18 hr |
Nearby
Red Flag Warnings in Illinois, 2012Red Flag Warnings in Indiana, 2012Every red flag 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.