Alert archive / Iowa / Red Flag Warnings in 2018
Red Flag Warning 2, NWS Des Moines, IA
NWS Des Moines, IA issued this red flag warning at Apr 29, 2018, 3:26 AM CDT for 25 counties in Iowa. It took effect at Apr 29, 2018, 1:00 PM CDT. It was in force for 8 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 29, 2018, 3:26 AM CDT (08:26 UTC)
- In effect from
- Apr 29, 2018, 1:00 PM CDT
- Expired
- Apr 29, 2018, 9:00 PM CDT
- In force
- 8 hr
- Issued by
- NWS Des Moines, IA
All 25 counties
Black Hawk County, IA, Boone County, IA, Bremer County, IA, Butler County, IA, Calhoun County, IA, Carroll County, IA, Cerro Gordo County, IA, Crawford County, IA, Emmet County, IA, Franklin County, IA, Greene County, IA, Grundy County, IA, Hamilton County, IA, Hancock County, IA, Hardin County, IA, Humboldt County, IA, Kossuth County, IA, Palo Alto County, IA, Pocahontas County, IA, Sac County, IA, Story County, IA, Webster County, IA, Winnebago County, IA, Worth County, IA, Wright County, IA
The radar
The Des Moines radar (KDMX), 102 km from the middle of the area, began a volume at 08:29 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
Minneapolis, MN (KMPX), launched 00:00Z, 8.4 hours before the alert went out and 246 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
- 2202 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- -48 m²/s²
- 0-3 km storm-relative helicity
- 25 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
132 WWUS83 KDMX 290826 RFWDMX URGENT - FIRE WEATHER MESSAGE National Weather Service Des Moines IA 326 AM CDT Sun Apr 29 2018 ...Extreme Fire Weather Danger This Afternoon... .Increasing southerly winds combined with mild temperatures, low relative humidity, and dry fuels will lead to extreme fire danger conditions this afternoon. Gusty winds will continue into the early evening, then diminish with sunset as relative humidity increases. IAZ005>007-016-017-024>028-035>039-047-048-291630- /O.NEW.KDMX.FW.W.0002.180429T1800Z-180430T0000Z/ Kossuth-Winnebago-Worth-Hancock-Cerro Gordo-Humboldt-Wright- Franklin-Butler-Bremer-Webster-Hamilton-Hardin-Grundy-Black Hawk- Boone-Story- 326 AM CDT Sun Apr 29 2018 ...RED FLAG WARNING IN EFFECT FROM 1 PM UNTIL 7 PM TODAY FOR EXTREME FIRE CONDITIONS... The National Weather Service in Des Moines has issued a Red Flag Warning, which is in effect from 1 PM this afternoon to 7 PM CDT this evening. * WIND...Southeast to South at 20 to 25 mph, gusting to near 40 mph at times. * HUMIDITY...Falling to 20 to 25 percent. * FUEL...Very dry grasses, nearly 100 percent cured. * IMPACTS...Open burning is discouraged and any fires that develop will spread rapidly and grow out of control due to the extreme fire conditions. 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 can contribute to extreme fire behavior. && $$ Lee
5 follow-up statements
195 WWUS83 KDMX 291624 RFWDMX URGENT - FIRE WEATHER MESSAGE National Weather Service Des Moines IA 1124 AM CDT Sun Apr 29 2018 ...Extreme Fire Weather Danger This Afternoon... .Increasing southerly winds combined with mild temperatures, low relative humidity, and dry fuels will lead to extreme fire danger conditions this afternoon. Gusty winds will continue into the early evening, then diminish with sunset as relative humidity increases. IAZ005>007-016-017-024>028-035>039-047-048-300000- /O.CON.KDMX.FW.W.0002.180429T1800Z-180430T0000Z/ Kossuth-Winnebago-Worth-Hancock-Cerro Gordo-Humboldt-Wright- Franklin-Butler-Bremer-Webster-Hamilton-Hardin-Grundy-Black Hawk- Boone-Story- 1124 AM CDT Sun Apr 29 2018 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING FOR EXTREME FIRE CONDITIONS... * WIND...Southeast to South at 20 to 25 mph, gusting to near 40 mph at times. * HUMIDITY...Falling to 20 to 25 percent. * FUEL...Very dry grasses, nearly 100 percent cured. * IMPACTS...Open burning is discouraged and any fires that develop will spread rapidly and grow out of control due to the extreme fire conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. && $$ REV
394 WWUS83 KDMX 291857 RFWDMX URGENT - FIRE WEATHER MESSAGE National Weather Service Des Moines IA 157 PM CDT Sun Apr 29 2018 ...Extreme Fire Weather Danger This Afternoon... .Increasing southerly winds combined with mild temperatures, low relative humidity, and dry fuels will lead to extreme fire danger conditions this afternoon. Gusty winds will continue into the early evening, then diminish with sunset as relative humidity increases. IAZ004-015-023-033-034-044>046-300000- /O.EXA.KDMX.FW.W.0002.000000T0000Z-180430T0000Z/ Emmet-Palo Alto-Pocahontas-Sac-Calhoun-Crawford-Carroll-Greene- 157 PM CDT Sun Apr 29 2018 ...RED FLAG WARNING IN EFFECT UNTIL 7 PM CDT THIS EVENING FOR EXTREME FIRE CONDITIONS... The National Weather Service in Des Moines has issued a Red Flag Warning, which is in effect until 7 PM CDT this evening. * WIND...Southeast to South at 20 to 25 mph, gusting to near 40 mph at times. * HUMIDITY...Falling to 20 to 25 percent. * FUEL...Very dry grasses, nearly 100 percent cured. * IMPACTS...Open burning is discouraged and any fires that develop will spread rapidly and grow out of control due to the extreme fire conditions. 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 can contribute to extreme fire behavior. && $$ IAZ005>007-016-017-024>028-035>039-047-048-300000- /O.CON.KDMX.FW.W.0002.000000T0000Z-180430T0000Z/ Kossuth-Winnebago-Worth-Hancock-Cerro Gordo-Humboldt-Wright- Franklin-Butler-Bremer-Webster-Hamilton-Hardin-Grundy-Black Hawk- Boone-Story- 157 PM CDT Sun Apr 29 2018 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING FOR EXTREME FIRE CONDITIONS... * WIND...Southeast to South at 20 to 25 mph, gusting to near 40 mph at times. * HUMIDITY...Falling to 20 to 25 percent. * FUEL...Very dry grasses, nearly 100 percent cured. * IMPACTS...Open burning is discouraged and any fires that develop will spread rapidly and grow out of control due to the extreme fire conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. && $$ REV
771 WWUS83 KDMX 292247 RFWDMX URGENT - FIRE WEATHER MESSAGE National Weather Service Des Moines IA 547 PM CDT Sun Apr 29 2018 ...Extreme Fire Weather Danger Continue... .Gusty south winds combined with very low relative humidity and dry fuels has led to extreme fire danger into this evening. IAZ004>007-015>017-023>028-033>039-044>048-300000- /O.CON.KDMX.FW.W.0002.000000T0000Z-180430T0000Z/ Emmet-Kossuth-Winnebago-Worth-Palo Alto-Hancock-Cerro Gordo- Pocahontas-Humboldt-Wright-Franklin-Butler-Bremer-Sac-Calhoun- Webster-Hamilton-Hardin-Grundy-Black Hawk-Crawford-Carroll-Greene- Boone-Story- 547 PM CDT Sun Apr 29 2018 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING FOR EXTREME FIRE DANGER FOR FIRE WEATHER ZONES 004, 005, 006, 007, 015, 016, 017, 023, 024, 025, 026, 027, 028, 033, 034, 035, 036, 037, 038, 039, 044, 045, 046, 047, AND 048... * WIND...South at 20 to 25 mph, gusting to near 40 mph at times. * HUMIDITY...Ranging from 18 to 25 percent. * FUEL...Very dry grasses, nearly 100 percent cured. * IMPACTS...Open burning is discouraged and any fires that develop will spread rapidly and grow out of control due to the extreme fire conditions. 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 can contribute to extreme fire behavior. && $$ KLP
629 WWUS83 KDMX 292359 RFWDMX URGENT - FIRE WEATHER MESSAGE National Weather Service Des Moines IA 659 PM CDT Sun Apr 29 2018 ...Extreme Fire Weather Danger Continues... .Gusty south winds look to persist through the late evening. The winds, combined with very low relative humidity and dry fuels has led to extreme fire danger into this evening. IAZ004>007-015>017-023>028-033>039-044>048-300200- /O.EXT.KDMX.FW.W.0002.000000T0000Z-180430T0200Z/ Emmet-Kossuth-Winnebago-Worth-Palo Alto-Hancock-Cerro Gordo- Pocahontas-Humboldt-Wright-Franklin-Butler-Bremer-Sac-Calhoun- Webster-Hamilton-Hardin-Grundy-Black Hawk-Crawford-Carroll-Greene- Boone-Story- 659 PM CDT Sun Apr 29 2018 ...RED FLAG WARNING NOW IN EFFECT UNTIL 9 PM CDT THIS EVENING FOR EXTREME FIRE WEATHER CONDITIONS FOR FIRE WEATHER ZONES 004, 005, 006, 007, 015, 016, 017, 023, 024, 025, 026, 027, 028, 033, 034, 035, 036, 037, 038, 039, 044, 045, 046, 047, AND 048... * WIND...South at 20 to 25 mph, gusting to near 40 mph at times. The wind gusts are forecast to subside after sunset. * HUMIDITY...Ranging from 18 to 28 percent. * FUEL...Very dry grasses, nearly 100 percent cured. * IMPACTS...Open burning is discouraged and any fires that develop will spread rapidly and grow out of control due to the extreme fire conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. && $$ KLP
737 WWUS83 KDMX 300201 RFWDMX URGENT - FIRE WEATHER MESSAGE National Weather Service Des Moines IA 901 PM CDT Sun Apr 29 2018 ...Fire Weather Conditions Improving... .Temperatures have cooled to allow the relative humidity to increase late this evening. The very gusty winds have subsided as well and the extreme fire weather conditions are not expected any longer tonight. IAZ004>007-015>017-023>028-033>039-044>048-300315- /O.EXP.KDMX.FW.W.0002.000000T0000Z-180430T0200Z/ Emmet-Kossuth-Winnebago-Worth-Palo Alto-Hancock-Cerro Gordo- Pocahontas-Humboldt-Wright-Franklin-Butler-Bremer-Sac-Calhoun- Webster-Hamilton-Hardin-Grundy-Black Hawk-Crawford-Carroll-Greene- Boone-Story- 901 PM CDT Sun Apr 29 2018 ...RED FLAG WARNING WILL EXPIRE AT 9 PM CDT THIS EVENING FOR EXTREME FIRE WEATHER CONDITIONS FOR FIRE WEATHER ZONES 004, 005, 006, 007, 015, 016, 017, 023, 024, 025, 026, 027, 028, 033, 034, 035, 036, 037, 038, 039, 044, 045, 046, 047, AND 048... Temperatures have cooled to allow the relative humidity to increase late this evening. The very gusty winds have subsided as well and the extreme fire weather conditions are not expected any longer tonight. $$ KLP
Nearby
Red Flag Warnings in Iowa, 2018Every red flag warning in 2018
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.