Alert archive / North Dakota / Red Flag Warnings in 2010

Red Flag Warning 6, NWS Bismarck, ND

August 21, 2010Bowman County, Slope County, North Dakota

NWS Bismarck, ND issued this red flag warning at Aug 21, 2010, 3:47 AM MDT for Bowman County, Slope County, North Dakota. It took effect at Aug 21, 2010, 11:00 AM MDT. It was in force for 9 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: Aug 21, 2010, 3:47 AM MDT (09:47 UTC)
In effect from: Aug 21, 2010, 11:00 AM MDT
Expired: Aug 21, 2010, 8:00 PM MDT
In force: 9 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 09:48 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.

What forecasters said that day

The local office's own words before this red flag warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Bismarck, ND wrote its last area forecast discussion before this red flag warning went out at Aug 21, 2:49 AM MDT, 58 minutes earlier.

Area forecast discussion, Aug 21, 2:49 AM MDT, 58 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BISMARCK ND
349 AM CDT SAT AUG 21 2010

.SHORT TERM...TODAY THROUGH MONDAY NIGHT
MAIN FORECAST CONCERNS INVOLVE TEMPS...WINDS AND RESULTING FIRE
WEATHER ISSUES. SEE BELOW FOR FIRE WEATHER DISCUSSION. MODELS IN
DECENT AGREEMENT WITH BROAD RIDGE OVER NORTHERN PLAINS THROUGH MOST
OF THE WEEKEND LEADING TO DRY CONDITIONS AND SOME OF THE HOTTEST
WEATHER OF THE SEASON. MOST GUIDANCE PUSHES MAX TEMPS ON SUNDAY TO
AROUND 100. BY SUNDAY...LONGWAVE TROUGH BEGINS MOVING ACROSS THE
PACIFIC NORTHWEST AND ASSOCIATED SURFACE LOW MOVING ACROSS NORTHERN
MONTANA. SOME DIFFERENCES EXIST WITH NAM/GFS WITH PLACEMENT OF
SURFACE LOW BY 00Z MON. HAVE CONTINUED LOW POPS ON SUN AFTERNOON
ACROSS FAR WESTERN ND WITH FRONT APPROACHING THE AREA. AHEAD OF
SURFACE FRONT...STRONG SOUTHERLY WINDS WILL DOMINATE WITH WINDS
VEERING WEST/NORTHWEST BEHIND THE FRONT SUN NIGHT. HAVE ALSO
CONTINUED LOW POPS BEGINNING SUN NIGHT ASSOCIATED WITH THIS SYSTEM.
UPPER TROUGH SHOULD PUSH EAST OF REGION BY 12Z TUE.

.LONG TERM...TUESDAY THROUGH FRIDAY NIGHT...

MODELS ARE IN GOOD AGREEMENT WITH THE OVERALL TREND DURING THE
EXTENDED PERIOD. BY TUESDAY MORNING...THE LAST REMNANTS OF THE
SYSTEM THAT PUSHED THROUGH MONDAY SHOULD BE EXITING THE
REGION...MAKING WAY FOR A LARGE RIDGE TO BUILD IN OVER THE ROCKIES
AND CENTRAL PLAINS. THIS RIDGE IS EXPECTED TO DOMINATE THE
ATMOSPHERE OVER THE CWA THROUGH THE MAJORITY OF THE LONG
TERM...RESULTING IN DRY CONDITIONS AND A GRADUAL WARMING TREND OF
HIGHS IN THE 70S TUESDAY TO HIGHS IN THE 90S BY THURSDAY. MODELS GO
FROM STRONG AGREEMENT TO DRASTIC DIVERGENCE FRIDAY...MOSTLY
CONCERNING THE APPROACH OF THE NEXT TROUGH. THE 12Z ECMWF BRINGS THE
TROUGH THROUGH LATE FRIDAY...BRINGING A SLIGHT CHANCE OF PRECIP TO
MY WESTERN COUNTIES FRIDAY NIGHT. MEANWHILE THE 00Z GFS MERELY MOVES
SOUTHWESTERLY FLOW OVER THE NORTHERN PLAINS WITH THE MAIN TROUGH
HANGING BACK OVER THE WEST COAST. WILL LEAVE THE MENTION OF POPS IN
MY WEST...AS THE ECMWF SOLUTION HAS BEEN MORE CONSISTENT
RUN-TO-RUN.

.AVIATION...

LOWERED VISIBILITIES DUE TO SMOKE CONTINUE TO BE AN ISSUE THIS
MORNING...BUT DO NOT EXPECT CONDITIONS TO BE REDUCED TO ANYTHING
LESS THAN HIGH MVFR. OTHERWISE...SHOULD SEE VFR CONDITIONS PREVAIL
AT ALL TERMINALS THROUGH THE TAF PERIOD. LIGHT AND VARIABLE WINDS
SHOULD INCREASE AND SHIFT TO THE SOUTH AND SOUTHEAST TODAY AS A LOW
PRESSURE SYSTEM APPROACHES FROM THE WEST. THIS SHOULD HELP TO SCOUR
OUT ANY SMOKE AT THE LOWER LEVELS. ANY PRECIP ASSOCIATED WITH THE
SYSTEM SHOULD HOLD OFF UNTIL AT LEAST SUNDAY NIGHT.

&&

.FIRE WEATHER...WINDS LOOK TO BE A LITTLE STRONGER...15-25 MPH OUT
OF THE SOUTH...ON SATURDAY ACROSS SOUTHWEST ND. THESE WINDS COUPLED
WITH VERY WARM TEMPERATURES AND RELATIVE HUMIDITY AROUND 15 PERCENT
WILL RESULT IN RED FLAG CONDITIONS ON SATURDAY. RANGELAND FIRE
DANGER VALUES ALSO REACH THE VERY HIGH TO EXTREME CATEGORY ACROSS
BOWMAN AND SLOPE COUNTIES ON SATURDAY.

A FIRE WEATHER WATCH WILL ALSO BE ISSUED FOR SUNDAY ACROSS PORTIONS
OF SOUTHWEST AND SOUTH CENTRAL NORTH DAKOTA FOR VERY WARM
TEMPERATURES...STRONG WINDS AND LOW RELATIVE HUMIDITY. SOUTHERLY
WINDS OF 15-30 MPH WILL DEVELOP ON SUNDAY WHILE RELATIVE HUMIDITY
RANGES FROM 15-20 PERCENT. THERE IS SOME UNCERTAINTY ACROSS EXTREME
SOUTHWEST NORTH DAKOTA REGARDING WINDS ON SUNDAY AS A SURFACE FRONT
APPROACHES WESTERN NORTH DAKOTA. RANGELAND FIRE DANGER VALUES ARE
ALSO EXPECTED TO REACH THE VERY HIGH RANGE ACROSS THE WATCH AREA.

&&

.BIS WATCHES/WARNINGS/ADVISORIES...
FIRE WEATHER WATCH FROM SUNDAY AFTERNOON THROUGH SUNDAY EVENING
FOR NDZ033-034-040>045.

RED FLAG WARNING FROM 11 AM THIS MORNING TO 8 PM MDT THIS
EVENING FOR NDZ040-043.

&&

SHORT TERM...SAVADEL
LONG TERM/AVIATION...ABELING/NIEUWENHUIS
FIRE WEATHER...SAVADEL

Hazardous weather outlook, Aug 20, 3:10 PM MDT, 12 hours 37 minutes before

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The office that day

Everything else NWS Bismarck, ND issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 21, 3:47 AM MDT	Fire Weather Watch	BIS	Adams, Bowman, Grant, Hettinger, Morton, Sioux and 2 more	10 hr
Aug 21, 1:51 PM MDT	Red Flag Warning	BIS	Adams, Bowman, Burleigh, Emmons, Grant, Hettinger and 5 more	30 hr

Nearby

Red Flag Warnings in North Dakota, 2010 Every red flag warning in 2010

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.