Alert archive / Nebraska / Red Flag Warnings in 2011

Red Flag Warning 2, NWS Omaha, NE

April 5, 20115 counties in Nebraska

NWS Omaha, NE issued this red flag warning at Apr 5, 2011, 4:48 AM CDT for 5 counties in Nebraska. It took effect at Apr 5, 2011, 2:00 PM CDT. It was in force for 3 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 5, 2011, 4:48 AM CDT (09:48 UTC)
In effect from: Apr 5, 2011, 2:00 PM CDT
Expired: Apr 5, 2011, 5:00 PM CDT
In force: 3 hr
Issued by: NWS Omaha, NE

Counties Gage County, NE, Jefferson County, NE, Pawnee County, NE, Richardson County, NE, Saline County, NE

The radar

The Omaha radar (KOAX), 121 km from the middle of the area, began a volume at 09:46 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, 9.8 hours before the alert went out and 121 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2684 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 9 m²/s²
0-3 km storm-relative helicity: 113 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

796 
WWUS83 KOAX 050948
RFWOAX

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
448 AM CDT TUE APR 5 2011

...GUSTY WINDS AND LOW RELATIVE HUMIDITIES EXPECTED THIS AFTERNOON...

NEZ078-088-089-092-093-052200-
/O.NEW.KOAX.FW.W.0002.110405T1900Z-110405T2200Z/
SALINE-JEFFERSON-GAGE-PAWNEE-RICHARDSON-
448 AM CDT TUE APR 5 2011

...RED FLAG WARNING IN EFFECT FROM 2 PM TO 5 PM CDT THIS
AFTERNOON FOR GUSTY WINDS AND LOW HUMIDITY FOR COUNTIES ALONG 
THE KANSAS BORDER AS WELL AS JOHNSON AND SALINE...

THE NATIONAL WEATHER SERVICE IN OMAHA/VALLEY HAS ISSUED A RED
FLAG WARNING...WHICH IS IN EFFECT FROM 2 PM TO 5 PM CDT THIS
AFTERNOON. 

* AFFECTED AREA...IN NEBRASKA...FIRE WEATHER ZONE 078 SALINE...
  FIRE WEATHER ZONE 088 JEFFERSON...FIRE WEATHER ZONE 089 
  GAGE...FIRE WEATHER ZONE 092 PAWNEE...FIRE WEATHER ZONE 093 
  RICHARDSON.

* WIND...SUSTAINED WEST TO SOUTHWEST WINDS OF 15 TO 20 MPH WITH
  GUSTS OF 25 TO 30 MPH WILL BE COMMON THIS AFTERNOON.  

* HUMIDITY...RELATIVE HUMIDITY VALUES WILL RANGE FROM 15 TO 20
  PERCENT WITH TEMPERATURES IN THE UPPER 60S.  

* IMPACTS...THESE FIRE WEATHER CONDITIONS INDICATE THERE IS A
  POTENTIAL FOR RAPID FIRE GROWTH THIS AFTERNOON IF A WILDFIRE
  WERE TO START. FIRES COULD BECOME OUT OF CONTROL QUICKLY.

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.

&&

$$

NIETFELD

1 follow-up statement

368 
WWUS83 KOAX 052201
RFWOAX

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
501 PM CDT TUE APR 5 2011


NEZ078-088-089-092-093-052315-
/O.EXP.KOAX.FW.W.0002.000000T0000Z-110405T2200Z/
SALINE-JEFFERSON-GAGE-PAWNEE-RICHARDSON-
501 PM CDT TUE APR 5 2011

...RED FLAG WARNING EXPIRED AT 5 PM CDT THIS AFTERNOON FOR GUSTY
WINDS AND LOW HUMIDITY FOR COUNTIES ALONG THE KANSAS BORDER AS
WELL AS JOHNSON AND SALINE COUNTIES...

THE RED FLAG WARNING EXPIRED AT 5 PM CDT THIS AFTERNOON.

HOWEVER...SOUTHWEST WINDS OF 15 TO 25 MPH WITH A FEW HIGHER GUSTS
WILL PERSIST THROUGH 700 PM ALONG WITH RELATIVE HUMIDITY VALUES
THAT WILL GRADUALLY INCREASE TO 30 PERCENT.

$$
CHERMOK

Nearby

Red Flag Warnings in Nebraska, 2011 Every red flag warning in 2011

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.