Red Flag Warning 1, NWS Sioux Falls, SD

063 
WWUS83 KFSD 302044
RFWFSD

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE SIOUX FALLS SD
344 PM CDT TUE MAR 30 2010

.GUSTY WINDS...DRY GRASSES...AND LOW RELATIVE HUMIDITY HAVE
PRODUCED CONDITIONS FAVORABLE FOR THE RAPID SPREAD OF WILDFIRE.
CONDITIONS WILL IMPROVE THIS EVENING AS WINDS DECREASE AND
RELATIVE HUMIDITY IMPROVES.

MNZ900-SDZ257-258-310000-
/O.EXA.KFSD.FW.W.0001.000000T0000Z-100331T0000Z/
SOUTHWEST MINNESOTA-MIDDLE BIG SIOUX RIVER VALLEY-
LOWER JAMES RIVER TO LOWER BIG SIOUX RIVER VALLEY-
344 PM CDT TUE MAR 30 2010

...RED FLAG WARNING IN EFFECT UNTIL 7 PM CDT THIS EVENING...

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A RED FLAG
WARNING...WHICH IS IN EFFECT UNTIL 7 PM CDT THIS EVENING. 

THIS INCLUDES THE FOLLOWING FIRE WEATHER ZONES...
IN SOUTH DAKOTA...257...258
IN MINNESOTA...900

GUSTY WINDS...DRY GRASSES...AND LOW RELATIVE HUMIDITY HAVE
PRODUCED CONDITIONS FAVORABLE FOR THE RAPID SPREAD OF WILDFIRE.
CONDITIONS WILL IMPROVE THIS EVENING AS WINDS DECREASE AND
RELATIVE HUMIDITY IMPROVES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS
ARE EITHER OCCURRING NOW...OR IN THE NEAR FUTURE. A COMBINATION
OF STRONG AND GUSTY WINDS FROM 25 TO 35 MPH...LOW RELATIVE
HUMIDITY OF 20 TO 25 PERCENT...AND WARM TEMPERATURES IN THE UPPER
70S WILL CREATE EXPLOSIVE FIRE GROWTH POTENTIAL.

&&

$$

IAZ300-301-NEZ249-310000-
/O.CON.KFSD.FW.W.0001.000000T0000Z-100331T0000Z/
NORTHERN LOESS HILLS AND FLOYD RIVER BASIN-
IOWA GREAT LAKES/ROCK AND LITTLE SIOUX BASINS-
EXTREME NORTHEAST NEBRASKA-
344 PM CDT TUE MAR 30 2010

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM CDT THIS
EVENING...

A RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING.

THIS INCLUDES THE FOLLOWING FIRE WEATHER ZONES...
IN NEBRASKA...249
IN IOWA...300...301

GUSTY WINDS...DRY GRASSES...AND LOW RELATIVE HUMIDITY HAVE
PRODUCED CONDITIONS FAVORABLE FOR THE RAPID SPREAD OF WILDFIRE.
CONDITIONS WILL IMPROVE THIS EVENING AS WINDS DECREASE AND
RELATIVE HUMIDITY IMPROVES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS
ARE EITHER OCCURRING NOW...OR IN THE NEAR FUTURE. A COMBINATION
OF STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES
WILL CREATE EXPLOSIVE FIRE GROWTH POTENTIAL.

&&

$$

CHAPMAN

978 
WWUS83 KFSD 302359
RFWFSD

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE SIOUX FALLS SD
659 PM CDT TUE MAR 30 2010

.EVENING COOLING...THE CORRESPONDING INCREASE IN RELATIVE
HUMIDITY...AND A SLOW DECREASE IN WINDS WILL CONTINUE TO ALLEVIATE
THE FIRE DANGER OVER THE AREA THIS EVENING.

IAZ300-301-NEZ249-310100-
/O.EXP.KFSD.FW.W.0001.000000T0000Z-100331T0000Z/
NORTHERN LOESS HILLS AND FLOYD RIVER BASIN-
IOWA GREAT LAKES/ROCK AND LITTLE SIOUX BASINS-
EXTREME NORTHEAST NEBRASKA-
659 PM CDT TUE MAR 30 2010

...RED FLAG WARNING WILL EXPIRE AT 7 PM CDT THIS EVENING...

THE RED FLAG WARNING WILL EXPIRE AT 7 PM CDT THIS EVENING. 

THIS INCLUDES THE FOLLOWING FIRE WEATHER ZONES...
IN NEBRASKA...249
IN IOWA...300...301

COOLING WITH THE APPROACH AND PASSAGE OF SUNSET...INCREASING
RELATIVE HUMIDITIES...AND SLOWLY DECREASING WINDS WILL ALLOW THE
FIRE DANGER TO CONTINUE TO DECREASE THIS EVENING.

$$

MNZ900-SDZ257-258-310100-
/O.EXP.KFSD.FW.W.0001.000000T0000Z-100331T0000Z/
SOUTHWEST MINNESOTA-MIDDLE BIG SIOUX RIVER VALLEY-
LOWER JAMES RIVER TO LOWER BIG SIOUX RIVER VALLEY-
659 PM CDT TUE MAR 30 2010

...RED FLAG WARNING WILL EXPIRE AT 7 PM CDT THIS EVENING...

THE RED FLAG WARNING WILL EXPIRE AT 7 PM CDT THIS EVENING. 

THIS INCLUDES THE FOLLOWING FIRE WEATHER ZONES...
IN SOUTH DAKOTA...257...258
IN MINNESOTA...900

COOLING WITH THE APPROACH AND PASSAGE OF SUNSET...INCREASING
RELATIVE HUMIDITIES...AND SLOWLY DECREASING WINDS WILL ALLOW THE
FIRE DANGER TO CONTINUE TO DECREASE THIS EVENING.

$$
WILLIAMS

AREA FORECAST DISCUSSION FOR SOUTHEAST SD/SOUTHWEST MN/NORTHWEST IA
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1018 AM CDT TUE MAR 30 2010

.DISCUSSION...
ONLY CHANGE FOR TODAY WAS TO BUMP UP THE FIRE DANGER TO THE EXTREME
CATEGORY INTO SW MN AND MUCH NW IA AND THICKEN CLOUD COVER SLIGHTLY.
MAIN CONCERN IS WITH THE WIND...WHICH CURRENTLY IS GUSTING AT 25 TO
35 MPH OVER THIS AREA...AND EVEN CLOSE TO 40 MPH AT SLB AND SPW.
THERE IS THE POTENTIAL FOR RED FLAG TYPE CONDITIONS...BUT IT APPEARS
THICK CIRRUS WILL INHIBIT DEEP MIXING TODAY...AT LEAST NOT MIXING TO
THE POTENTIAL MAX...AND MAY HOLD TEMPERATURES DOWN A FEW DEGREES
BELOW THE CURRENT HIGHS DEPENDING HOW THICK THE CIRRUS REMAINS. LACK
OF DEEP MIXING SHOULD KEEP RELATIVE HUMIDITY ABOVE RED FLAG CRITERIA
WHERE THE WINDS ARE THE STRONGEST. /97

&&

.AVIATION...

VFR CONDITIONS EXPECTED THROUGH TODAY. BRISK SOUTHERLY WINDS WILL BE
PRESENT...ESPECIALLY TO THE EAST OF INTERSTATE 29 WHERE SUSTAINED
WINDS WILL BE 20 TO 25 KTS...WITH GUSTS TO 30-35 KTS. WINDS WILL
DIMINSH TONIGHT

&&

.PREV DISCUSSION...
MAIN ISSUE AGAIN TODAY WL BE THE FIRE DANGER THREAT ACRS CWA.
WARMERST TEMPS AND LOWEST RH LEVELS WL BE ACRS WRN CWA...BUT WNDS WL
NOT BE AS STRONG. THIS WL LIKELY KEEP FIRE DANGER BLO RED FLAG
CRITERIA...BUT DEF IN THE EXTREME CAT ACRS THE SW. FURTHER E...TEMPS
WL NOT BE AS WARM WITH HIGHER RH. HWVR...FEEL MODELS TOO HIGH ON THE
DPS AND FEEL MOST OF DAY WL BE IN THE MID 30S TO LOWER 40S. THESE
LOWER DPS COMBINED WITH THE STRONGER WNDS WL PUSH THE FIRE DANGER
INTO THE VERY HIGH CATEGORY. SHUD SEE FAIRLY WDSPRD CI ACRS CWA
EARLY THIS MORN...BUT SHUD THIN OUT DURING DAY AND SHUD BE MOSUNNY
THIS AFTN.

WEAK S/W WL PUSH WEAK CDFNT SEWD ACRS CWA TONIGHT INTO WED. TEMPS WL
BE ABOUT 10 DEG COOLER ACRS WRN CWA BEHIND THIS FNT ON WED...WITH
70S ACRS THE E WHERE IT SHUD MIX OUT AHEAD OF FNT. WL PBLY SEE SOME
CI WITH THIS S/W AND WNDS LIKELY NOT TO BE AS STG AS TODAY ACRS THE
ERN CWA...SO FIRE DANGER WL NOT BE AS HIGH ON WED.

FNT WL STALL OUT JUST SE OF CWA ON THU AND MAY LIFT A LTL FURTHER
N THU AFTN. MOST OF CWA WL BE COOLER ON THU WITH HIGHS FM ONLY THE
LOWER 50S NW WHERE MORE CLOUD COVER AND NELY LOW LEVEL FLOW EXPECTED
TO THE MID TO UPPER 70S ACRS FAR SERN CWA WHERE LOW LEVEL FLOW WL
BECOME MORE SLY IN THE AFTN. MOST OF CWA CAPPED OFF ON THU ANY ANY
RAIN THAT CAN DEVELOP BEHIND FNT WL BE WELL NW OF FNT. WAS TEMPTED
TO PULL POPS ACRS WRN CWA THU DURING THE DAY...BUT WL KEEP SMALL POP
IN FCST.

MODELS STILL NOT IN AGREEMENT ON PRECIP CHC THU NITE INTO FRI MORN.
BOTH GFS AND EC HAVE FAIRLY DECENT ELEVATED INSTABIL LATE THU NITE E
OF I29...BUT CAP IS FAIRLY STG. IF ELEVATED STORMS CAN GET
GOING...THE BEST CHC WUD BE E OF I29 AFTER 06Z FRI. FURTHER NW ACRS
FAR NW CWA...S/W SHEARING OFF TO THE NE DURING THE NIGHT MAY PRODUCE
SOME FAIRLY WDSPRD R-...BUT HOW FAR NW OF SFC FNT IS STILL IN
QUESTION. THIS AREA OF RAIN CUD REMAIN NW OF CWA...BUT MODELS DO
SHOW SOME MID LVL FNTLGEN THERE AND WL KEEP FAIRLY HIGH POP THERE.

FRI CUD BE AN INTERESTING DAY ESPEC ERN CWA FRI AFTN AND FRI NITE.
BOTH EC AND GEM LIFT SRN WAVE FURTHER N THAN GFS. IF THIS SOLUTION
OCCURS...THEN BEST CHC FOR RW/TRW ACRS ERN CWA CUD BE FRI AFTN AND
NITE...PSBLY LINGERING INTO SAT. GFS ON THE OTHER HAND KEEPS WAVE
WELL S AND DOESNT LIFT IT NEWD. GFS UPPER PATTERN SEEMS A BIG
CHAOTIC AND PREFER SMOOTHER SOLUTION OF GEM/EC. SO WL KEEP HIGH POPS
GOING ACRS SERN CWA FRI AND FRI NITE. WL NEED TO WATCH THIS AS CUD
SEE 1+ INCHES OF RAIN ACRS NW IA FRI AFTN AND NITE. SHUD ALSO BE
QUITE A BIT COOLER FRI ACRS CWA WITH CLOUDS...RAIN AND NELY LOW
LEVEL FLOW. SAT CUD BE A CLOUDY AND COOL DAY ACRS THE E IF THIS
WAVE SLOWS DOWN EVEN MORE OR LIFTS FURTHER NWD FRI NITE.

&&

.FSD WATCHES/WARNINGS/ADVISORIES...

SD...NONE.
MN...NONE.
IA...NONE.
NE...NONE.

&&

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SIOUX FALLS SD
916 AM CDT TUE MAR 30 2010

SDZ038>040-050-052>071-MNZ071-072-080-081-089-090-097-098-
IAZ001>003-012>014-020>022-031-032-NEZ013-014-311200-
AURORA-BEADLE-BON HOMME-BROOKINGS-BRULE-BUENA VISTA IA-
CHARLES MIX-CHEROKEE IA-CLAY-CLAY IA-COTTONWOOD MN-DAKOTA NE-
DAVISON-DICKINSON IA-DIXON NE-DOUGLAS-GREGORY-HANSON-HUTCHINSON-
IDA IA-JACKSON MN-JERAULD-KINGSBURY-LAKE-LINCOLN-LINCOLN MN-
LYON IA-LYON MN-MCCOOK-MINER-MINNEHAHA-MOODY-MURRAY MN-NOBLES MN-
OBRIEN IA-OSCEOLA IA-PIPESTONE MN-PLYMOUTH IA-ROCK MN-SANBORN-
SIOUX IA-TURNER-UNION-WOODBURY IA-YANKTON-
916 AM CDT TUE MAR 30 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST SOUTH DAKOTA...
SOUTHWEST MINNESOTA...NORTHWEST IOWA...AND NORTHEAST NEBRASKA.

.DAY ONE...TODAY AND TONIGHT

FLOODING...
FLOODING WILL CONTINUE ALONG THE JAMES RIVER UNTIL FURTHER
NOTICE. OTHER MAIN STEM RIVERS CONTINUE TO FALL.

FIRE DANGER...
GUSTY WINDS...DRY GRASSES...AND LOW RELATIVE HUMIDITY WILL PUSH
THE GRASSLAND FIRE INDEX INTO THE EXTREME CATEGORY ALONG THE
MISSOURI RIVER AND THROUGH THE JAMES RIVER VALLEY THIS AFTERNOON.
THE GRASSLAND FIRE INDEX WILL ALSO REACH THE EXTREME CATEGORY
ACROSS SOUTHWEST MINNESOTA AND MUCH OF NORTHWEST IOWA. THE VERY
HIGH CATEGORY WILL BE FOUND ALONG THE INTERSTATE 29 CORRIDOR.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY AND TONIGHT.

&&

FOR MORE INFORMATION PLEASE VISIT OUR WEBSITE AT
WWW.WEATHER.GOV/SIOUXFALLS. THIS INCLUDES THE GRAPHICAL HAZARDOUS
WEATHER OUTLOOK.