Alert archive / Nebraska / Red Flag Warnings in 2021
Red Flag Warning 6, NWS Omaha, NE
NWS Omaha, NE issued this red flag warning at Apr 2, 2021, 3:29 AM CDT for 30 counties in Nebraska; 8 counties in Iowa. It took effect at Apr 2, 2021, 12:00 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 2, 2021, 3:29 AM CDT (08:29 UTC)
- In effect from
- Apr 2, 2021, 12:00 PM CDT
- Expired
- Apr 2, 2021, 8:00 PM CDT
- In force
- 8 hr
- Issued by
- NWS Omaha, NE
All 38 counties
Fremont County, IA, Harrison County, IA, Mills County, IA, Monona County, IA, Montgomery County, IA, Page County, IA, Pottawattamie County, IA, Shelby County, IA, Antelope County, NE, Boone County, NE, Burt County, NE, Butler County, NE, Cass County, NE, Cedar County, NE, Colfax County, NE, Cuming County, NE, Dodge County, NE, Douglas County, NE, Gage County, NE, Jefferson County, NE, Johnson County, NE, Knox County, NE, Lancaster County, NE, Madison County, NE, Nemaha County, NE, Otoe County, NE, Pawnee County, NE, Pierce County, NE, Platte County, NE, Richardson County, NE, Saline County, NE, Sarpy County, NE, Saunders County, NE, Seward County, NE, Stanton County, NE, Thurston County, NE, Washington County, NE, Wayne County, NE
The radar
The Omaha radar (KOAX), 16 km from the middle of the area, began a volume at 08:28 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, 8.5 hours before the alert went out and 16 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
- 2694 m above ground
- 0-6 km bulk shear
- 63 kt
- 0-1 km storm-relative helicity
- 134 m²/s²
- 0-3 km storm-relative helicity
- 406 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
695 WWUS83 KOAX 020829 RFWOAX URGENT - FIRE WEATHER MESSAGE National Weather Service Omaha/Valley NE 329 AM CDT Fri Apr 2 2021 IAZ069-079-080-090-091-NEZ042>045-050>053-065>068-078-088>093- 021630- /O.UPG.KOAX.FW.A.0003.210402T1700Z-210403T0100Z/ /O.NEW.KOAX.FW.W.0006.210402T1700Z-210403T0100Z/ Pottawattamie-Mills-Montgomery-Fremont-Page-Platte-Colfax-Dodge- Washington-Butler-Saunders-Douglas-Sarpy-Seward-Lancaster-Cass- Otoe-Saline-Jefferson-Gage-Johnson-Nemaha-Pawnee-Richardson- 329 AM CDT Fri Apr 2 2021 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 8 PM CDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR EASTERN 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 noon today to 8 PM CDT this evening. The Fire Weather Watch is no longer in effect. * Affected Area...In Iowa, Pottawattamie, Mills, Montgomery, Fremont and Page. In Nebraska, Platte, Colfax, Dodge, Washington, Butler, Saunders, Douglas, Sarpy, Seward, Lancaster, Cass, Otoe, Saline, Jefferson, Gage, Johnson, Nemaha, Pawnee and Richardson. * Winds...South 20 to 25 mph with gusts up to 35 to 40 mph. * Relative Humidity...As low as 20 percent. * Impacts...Any fires that ignite may spread rapidly and exhibit extreme fire 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. && $$ IAZ043-055-056-NEZ011-012-015>018-030>034-021630- /O.NEW.KOAX.FW.W.0006.210402T1700Z-210403T0100Z/ Monona-Harrison-Shelby-Knox-Cedar-Thurston-Antelope-Pierce-Wayne- Boone-Madison-Stanton-Cuming-Burt- 329 AM CDT Fri Apr 2 2021 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 8 PM CDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR EASTERN NEBRASKA AND SOUTHWEST IOWA... The National Weather Service in Omaha/Valley has issued a Red Flag Warning for wind and low relative humidity, which is in effect from noon today to 8 PM CDT this evening. * Affected Area...In Iowa, Monona, Harrison and Shelby. In Nebraska, Knox, Cedar, Thurston, Antelope, Pierce, Wayne, Boone, Madison, Stanton, Cuming and Burt. * Winds...South 15 to 25 mph with gusts up to 35 to 40 mph. * Relative Humidity...As low as 20 percent. * Impacts... PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity and warm temperatures can contribute to extreme fire behavior. && $$
1 follow-up statement
867 WWUS83 KOAX 021604 RFWOAX URGENT - FIRE WEATHER MESSAGE National Weather Service Omaha/Valley NE 1104 AM CDT Fri Apr 2 2021 IAZ043-055-056-069-079-080-090-091-NEZ011-012-015>018-030>034- 042>045-050>053-065>068-078-088>093-030100- /O.CON.KOAX.FW.W.0006.210402T1700Z-210403T0100Z/ Monona-Harrison-Shelby-Pottawattamie-Mills-Montgomery-Fremont- Page-Knox-Cedar-Thurston-Antelope-Pierce-Wayne-Boone-Madison- Stanton-Cuming-Burt-Platte-Colfax-Dodge-Washington-Butler- Saunders-Douglas-Sarpy-Seward-Lancaster-Cass-Otoe-Saline- Jefferson-Gage-Johnson-Nemaha-Pawnee-Richardson- 1104 AM CDT Fri Apr 2 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM CDT FOR WIND AND LOW RELATIVE HUMIDITY FOR EASTERN NEBRASKA AND SOUTHWEST IOWA... * Affected Area...In Iowa, Monona, Harrison, Shelby, Pottawattamie, Mills, Montgomery, Fremont and Page. In Nebraska, Knox, Cedar, Thurston, Antelope, Pierce, Wayne, Boone, Madison, Stanton, Cuming, Burt, Platte, Colfax, Dodge, Washington, Butler, Saunders, Douglas, Sarpy, Seward, Lancaster, Cass, Otoe, Saline, Jefferson, Gage, Johnson, Nemaha, Pawnee and Richardson. * Winds...From the south-southwest at 15 to 25 mph with gusts of 35 to 45 mph. * Relative Humidity...As low as 20 to 23 percent. * Impacts...Any fires that ignite may spread rapidly and 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. && $$
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.