Alert archive / North Dakota / Red Flag Warnings in 2011

Red Flag Warning 3, NWS Bismarck, ND

September 20, 2011Bowman County, Slope County, North Dakota

NWS Bismarck, ND issued this red flag warning at Sep 20, 2011, 3:07 AM MDT for Bowman County, Slope County, North Dakota. It took effect at Sep 20, 2011, 9:00 AM MDT. It was in force for 5 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: Sep 20, 2011, 3:07 AM MDT (09:07 UTC)
In effect from: Sep 20, 2011, 9:00 AM MDT
Expired: Sep 20, 2011, 2:12 PM MDT
In force: 5 hr
Issued by: NWS Bismarck, ND

Counties Bowman County, ND, Slope County, ND

The radar

The Bismarck radar (KBIS), 216 km from the middle of the area, began a volume at 09:09 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

Bismarck Municip, ND (KBIS), launched 00:00Z, 9.1 hours before the alert went out and 220 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: 2931 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 70 m²/s²
0-3 km storm-relative helicity: 136 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.

982 
WWUS83 KBIS 200907
RFWBIS

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE BISMARCK ND
407 AM CDT TUE SEP 20 2011

...A RED FLAG WARNING IS IN EFFECT FOR FAR SOUTHWEST NORTH DAKOTA
TODAY FOR STRONG NORTHWEST WINDS AND CURING FUELS...

.WHILE DAYTIME MINIMUM RELATIVE HUMIDITY VALUES ARE ONLY FORECAST TO 
FALL INTO THE 35 TO 40 PERCENT RANGE THIS AFTERNOON ACROSS THE FAR 
SOUTHWEST...SUSTAINED SURFACE WINDS OF 30 TO 40 MPH WITH GUSTS IN 
EXCESS OF 50 MPH COUPLED WITH THE LOWEST PERCENT GREEN VALUES IN THE 
STATE WILL YIELD VERY HIGH FIRE DANGER ACROSS BOWMAN AND SLOPE 
COUNTIES TODAY. DUE TO THE CONCERN FOR RAPID FIRE GROWTH WITH THE
STRONG WINDS AND DRY VEGETATION...THE FIRE WEATHER WATCH HAS BEEN
UPGRADED TO A RED FLAG WARNING FOR BOWMAN AND SLOPE COUNTIES..DESPITE
RELATIVE HUMIDITY VALUES REMAINING ABOVE CRITICAL LEVELS.

NDZ040-043-202200-
/O.UPG.KBIS.FW.A.0003.110920T1500Z-110921T0000Z/
/O.NEW.KBIS.FW.W.0003.110920T1500Z-110921T0000Z/
SLOPE-BOWMAN-
307 AM MDT TUE SEP 20 2011

...RED FLAG WARNING IN EFFECT FROM 9 AM THIS MORNING TO 6 PM MDT
THIS EVENING FOR VERY STRONG WINDS AND CURING FUELS FOR FIRE
WEATHER ZONES 040 AND 043...

THE NATIONAL WEATHER SERVICE IN BISMARCK HAS ISSUED A RED FLAG
WARNING...WHICH IS IN EFFECT FROM 9 AM THIS MORNING TO 6 PM MDT
THIS EVENING. THE FIRE WEATHER WATCH IS NO LONGER IN EFFECT. 

THIS INCLUDES THE FOLLOWING FIRE WEATHER ZONES...
IN NORTH DAKOTA...40...43

* VERY STRONG NORTHWEST WINDS SUSTAINED AT 30 TO 40 MPH WITH
  GUSTS IN EXCESS OF 50 MPH...COUPLED WITH DRY VEGETATION WILL
  YIELD VERY HIGH FIRE DANGER TODAY ACROSS BOWMAN AND SLOPE
  COUNTIES.

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.

&&

$$

AYD

1 follow-up statement

855 
WWUS83 KBIS 202012
RFWBIS

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE BISMARCK ND
312 PM CDT TUE SEP 20 2011

...RED FLAG WARNING CANCELLED...

.CLOUDY SKIES AND HIGH AFTERNOON HUMIDITIES HAVE KEPT FIRE HAZARDS
MINIMAL TODAY.  

NDZ040-043-202115-
/O.CAN.KBIS.FW.W.0003.000000T0000Z-110921T0000Z/
SLOPE-BOWMAN-
212 PM MDT TUE SEP 20 2011

...THE RED FLAG WARNING IS CANCELLED FOR FAR SOUTHWEST NORTH
DAKOTA...

CLOUDY SKIES AND HIGH AFTERNOON HUMIDITIES HAVE KEPT FIRE HAZARDS
MINIMAL TODAY.  

$$

NH

Nearby

Red Flag Warnings in North Dakota, 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.