Alert archive / Nebraska / Red Flag Warnings in 2021
Red Flag Warning 2, NWS Omaha, NE
NWS Omaha, NE issued this red flag warning at Mar 10, 2021, 2:59 AM CST for 5 counties in Iowa; 7 counties in Nebraska. It took effect at Mar 10, 2021, 11:00 AM CST. 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
- Mar 10, 2021, 2:59 AM CST (08:59 UTC)
- In effect from
- Mar 10, 2021, 11:00 AM CST
- Expired
- Mar 10, 2021, 6:00 PM CST
- In force
- 7 hr
- Issued by
- NWS Omaha, NE
Counties Fremont County, IA, Mills County, IA, Montgomery County, IA, Page County, IA, Pottawattamie County, IA, Cass County, NE, Gage County, NE, Johnson County, NE, Nemaha County, NE, Otoe County, NE, Pawnee County, NE, Richardson County, NE
The radar
The Omaha radar (KOAX), 87 km from the middle of the area, began a volume at 09:00 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
Omaha, NE (KOAX), launched 00:00Z, 9.0 hours before the alert went out and 87 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
- -270 J/kg
- Mixed-layer LCL
- 1797 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 118 m²/s²
- 0-3 km storm-relative helicity
- 136 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
684 WWUS83 KOAX 100859 RFWOAX URGENT - FIRE WEATHER MESSAGE National Weather Service Omaha/Valley NE 259 AM CST Wed Mar 10 2021 IAZ069-079-080-090-091-NEZ067-068-089>093-110000- /O.NEW.KOAX.FW.W.0002.210310T1700Z-210311T0000Z/ Pottawattamie-Mills-Montgomery-Fremont-Page-Cass-Otoe-Gage- Johnson-Nemaha-Pawnee-Richardson- 259 AM CST Wed Mar 10 2021 ...RED FLAG WARNING IN EFFECT FROM 11 AM THIS MORNING TO 6 PM CST THIS EVENING FOR VERY STRONG WIND AND LOW RELATIVE HUMIDITY FOR PARTS OF SOUTHEAST NEBRASKA AND SOUTHWEST IOWA... The National Weather Service in Omaha/Valley has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 11 AM this morning to 6 PM CST this evening. * Affected Area...In Iowa, Fire Weather Zone 069 Pottawattamie, Fire Weather Zone 079 Mills, Fire Weather Zone 080 Montgomery, Fire Weather Zone 090 Fremont and Fire Weather Zone 091 Page. In Nebraska, Fire Weather Zone 067 Cass, Fire Weather Zone 068 Otoe, Fire Weather Zone 089 Gage, Fire Weather Zone 090 Johnson, Fire Weather Zone 091 Nemaha, Fire Weather Zone 092 Pawnee and Fire Weather Zone 093 Richardson. * Winds...From the southwest, sustained winds 25 to 35 mph with gusts up to 55 mph. * Relative Humidity...Minimum values in the 18 to 26 percent range. The lowest RH will occur in a 3 hour period in the afternoon as a narrow axis of very dry air moves across the area. * Impacts...Any fires may exhibit extreme behavior. 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. && $$
4 follow-up statements
583 WWUS83 KOAX 101809 RFWOAX URGENT - FIRE WEATHER MESSAGE National Weather Service Omaha/Valley NE 1209 PM CST Wed Mar 10 2021 IAZ069-079-080-090-091-NEZ067-068-089>093-110000- /O.CON.KOAX.FW.W.0002.000000T0000Z-210311T0000Z/ Pottawattamie-Mills-Montgomery-Fremont-Page-Cass-Otoe-Gage- Johnson-Nemaha-Pawnee-Richardson- 1209 PM CST Wed Mar 10 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 6 PM CST THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR STRONG WIND AND LOW RELATIVE HUMIDITY FOR PARTS OF SOUTHEAST NEBRASKA AND SOUTHWEST IOWA... * Affected Area...In Iowa, Fire Weather Zone 069 Pottawattamie, Fire Weather Zone 079 Mills, Fire Weather Zone 080 Montgomery, Fire Weather Zone 090 Fremont and Fire Weather Zone 091 Page. In Nebraska, Fire Weather Zone 067 Cass, Fire Weather Zone 068 Otoe, Fire Weather Zone 089 Gage, Fire Weather Zone 090 Johnson, Fire Weather Zone 091 Nemaha, Fire Weather Zone 092 Pawnee and Fire Weather Zone 093 Richardson. * Winds...Southwest 25 to 35 mph with gusts up to 55 mph. * Relative Humidity...As low as 26 percent. * Impacts...Any fires may exhibit extreme behavior. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity and warm temperatures can contribute to extreme fire behavior. && $$
721 WWUS83 KOAX 101811 RFWOAX URGENT - FIRE WEATHER MESSAGE National Weather Service Omaha/Valley NE 1211 PM CST Wed Mar 10 2021 IAZ069-079-080-090-091-NEZ067-068-089>093-110000- /O.CON.KOAX.FW.W.0002.000000T0000Z-210311T0000Z/ Pottawattamie-Mills-Montgomery-Fremont-Page-Cass-Otoe-Gage- Johnson-Nemaha-Pawnee-Richardson- 1211 PM CST Wed Mar 10 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 6 PM CST THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR PARTS OF SOUTHEAST NEBRASKA AND SOUTHWEST IOWA... * Affected Area...In Iowa, Fire Weather Zone 069 Pottawattamie, Fire Weather Zone 079 Mills, Fire Weather Zone 080 Montgomery, Fire Weather Zone 090 Fremont and Fire Weather Zone 091 Page. In Nebraska, Fire Weather Zone 067 Cass, Fire Weather Zone 068 Otoe, Fire Weather Zone 089 Gage, Fire Weather Zone 090 Johnson, Fire Weather Zone 091 Nemaha, Fire Weather Zone 092 Pawnee and Fire Weather Zone 093 Richardson. * Winds...Southwest 25 to 35 mph with gusts up to 55 mph. * Relative Humidity...As low as 26 percent. * Impacts...Any fires may exhibit extreme behavior. 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. && $$
201 WWUS83 KOAX 102131 RFWOAX URGENT - FIRE WEATHER MESSAGE National Weather Service Omaha/Valley NE 331 PM CST Wed Mar 10 2021 IAZ069-079-080-090-091-NEZ067-068-089>093-110000- /O.CON.KOAX.FW.W.0002.000000T0000Z-210311T0000Z/ Pottawattamie-Mills-Montgomery-Fremont-Page-Cass-Otoe-Gage- Johnson-Nemaha-Pawnee-Richardson- 331 PM CST Wed Mar 10 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 6 PM CST THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR PORTIONS OF SOUTHEAST NEBRASKA AND SOUTHWEST IOWA... * Affected Area...In Iowa, Fire Weather Zone 069 Pottawattamie, Fire Weather Zone 079 Mills, Fire Weather Zone 080 Montgomery, Fire Weather Zone 090 Fremont and Fire Weather Zone 091 Page. In Nebraska, Fire Weather Zone 067 Cass, Fire Weather Zone 068 Otoe, Fire Weather Zone 089 Gage, Fire Weather Zone 090 Johnson, Fire Weather Zone 091 Nemaha, Fire Weather Zone 092 Pawnee and Fire Weather Zone 093 Richardson. * Winds...West 20 to 30 mph with gusts up to 45 mph. * Relative Humidity...As low as 16 percent. * Impacts...Any fires may exhibit extreme behavior. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity and warm temperatures can contribute to extreme fire behavior. && $$
806 WWUS83 KOAX 102354 RFWOAX URGENT - FIRE WEATHER MESSAGE National Weather Service Omaha/Valley NE 554 PM CST Wed Mar 10 2021 IAZ069-079-080-090-091-NEZ067-068-089>093-110100- /O.EXP.KOAX.FW.W.0002.000000T0000Z-210311T0000Z/ Pottawattamie-Mills-Montgomery-Fremont-Page-Cass-Otoe-Gage- Johnson-Nemaha-Pawnee-Richardson- 554 PM CST Wed Mar 10 2021 ...RED FLAG WARNING WILL EXPIRE AT 6 PM CST THIS EVENING FOR PORTIONS OF SOUTHEAST NEBRASKA AND SOUTHWEST IOWA... Temperatures have cooled compared to earlier this afternoon, and relative humidity values have increased. This has lowered the fire danger across the area. The Red Flag Warning will be allowed to expire. Winds will gradually decrease through the evening. $$
Nearby
Red Flag Warnings in Nebraska, 2021Red Flag Warnings in Iowa, 2021Every red flag warning 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.