Alert archive / Nebraska / Red Flag Warnings in 2021
Red Flag Warning 7, NWS Omaha, NE
NWS Omaha, NE issued this red flag warning at Apr 26, 2021, 3:22 AM CDT for Jefferson County, Saline County, Seward County, Nebraska. It took effect at Apr 26, 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 26, 2021, 3:22 AM CDT (08:22 UTC)
- In effect from
- Apr 26, 2021, 12:00 PM CDT
- Expired
- Apr 26, 2021, 8:00 PM CDT
- In force
- 8 hr
- Issued by
- NWS Omaha, NE
Counties Jefferson County, NE, Saline County, NE, Seward County, NE
The radar
The Omaha radar (KOAX), 110 km from the middle of the area, began a volume at 08:21 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, 8.4 hours before the alert went out and 110 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
- 2302 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 28 m²/s²
- 0-3 km storm-relative helicity
- 129 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
483 WWUS83 KOAX 260822 RFWOAX URGENT - FIRE WEATHER MESSAGE National Weather Service Omaha/Valley NE 322 AM CDT Mon Apr 26 2021 NEZ030-042-043-050-260930- /O.CAN.KOAX.FW.A.0004.210426T1700Z-210427T0100Z/ Boone-Platte-Colfax-Butler- 322 AM CDT Mon Apr 26 2021 ...FIRE WEATHER WATCH IS CANCELLED FOR PORTIONS OF EAST CENTRAL NEBRASKA... The National Weather Service in Omaha/Valley has cancelled the Fire Weather Watch. The strongest winds today are expected to remain south and east of the area while the lowest relative humidity values are expected to remain south and west. Therefore, the Fire Weather Watch has been cancelled. However, very high fire danger conditions are still expected. $$ NEZ065-078-088-270100- /O.UPG.KOAX.FW.A.0004.210426T1700Z-210427T0100Z/ /O.NEW.KOAX.FW.W.0007.210426T1700Z-210427T0100Z/ Seward-Saline-Jefferson- 322 AM CDT Mon Apr 26 2021 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 8 PM CDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR PORTIONS OF SOUTHEAST NEBRASKA... The National Weather Service in Omaha/Valley has issued a Red Flag Warning for wind and low relative humidity, which is in effect from noon today to 8 PM CDT this evening. The Fire Weather Watch is no longer in effect. * Affected Area...In Nebraska, Seward, Saline and Jefferson. * Winds...South 15 to 20 mph with gusts up to 30 mph. * Relative Humidity...As low as 18 percent. * Impacts...Any fires that ignite may spread rapidly and exhibit extreme fire behavior. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity and warm temperatures can contribute to extreme fire behavior. && $$
2 follow-up statements
553 WWUS83 KOAX 262103 RFWOAX URGENT - FIRE WEATHER MESSAGE National Weather Service Omaha/Valley NE 403 PM CDT Mon Apr 26 2021 NEZ065-078-088-270100- /O.CON.KOAX.FW.W.0007.000000T0000Z-210427T0100Z/ Seward-Saline-Jefferson- 403 PM CDT Mon Apr 26 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM CDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY IN SALINE, SEWARD AND JEFFERSON COUNTIES... * Affected Area...In Nebraska, Seward, Saline and Jefferson. * Winds...South 10 to 15 mph with gusts up to 25 mph. * Relative Humidity...As low as 15 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. && $$ Albright
994 WWUS83 KOAX 270058 RFWOAX URGENT - FIRE WEATHER MESSAGE National Weather Service Omaha/Valley NE 758 PM CDT Mon Apr 26 2021 NEZ065-078-088-270200- /O.EXP.KOAX.FW.W.0007.000000T0000Z-210427T0100Z/ Seward-Saline-Jefferson- 758 PM CDT Mon Apr 26 2021 ...RED FLAG WARNING WILL EXPIRE AT 8 PM CDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR SALINE, SEWARD AND JEFFERSON COUNTIES... Winds are expected to continue diminishing and RH's are rebounding, allowing for the Red Flag Warning to expire. $$
Nearby
Red Flag Warnings in Nebraska, 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.