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Hazardous Weather Outlook

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SIOUX FALLS SD
0704 AM CDT MON APR 21 2014

SDZ038>040-050-052>071-MNZ071-072-080-081-089-090-097-098-
IAZ001>003-012>014-020>022-031-032-NEZ013-014-221200-
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-
0704 AM CDT MON APR 21 2014

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

.DAY ONE...TODAY AND TONIGHT

FIRE DANGER...
GUSTY NORTHWEST WINDS WILL COMBINE WITH A DRY AIR MASS AND VERY
DRY VEGETATION TO PRODUCE DANGEROUS FIRE CONDITIONS THROUGHOUT
THE AREA  THIS AFTERNOON. THE STRONGEST WINDS WILL BE ALONG AND
EAST OF THE JAMES RIVER VALLEY...WHERE FIRE DANGER WILL BE IN THE
EXTREME CATEGORY. AREAS WEST OF THE JAMES RIVER VALLEY IN SOUTH
CENTRAL SOUTH DAKOTA WILL SEE VERY HIGH FIRE DANGER THIS
AFTERNOON. STRONGLY CONSIDER POSTPONING ANY DEBRIS BURNING.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

THE GRASSLAND FIRE DANGER INDEX WILL REACH THE VERY HIGH CATEGORY
AGAIN ON TUESDAY...GENERALLY WEST OF A LINE FROM VERMILLION TO
SALEM TO HURON SOUTH DAKOTA. STRONG WINDS COULD ALSO PRODUCE
ELEVATED FIRE DANGER THROUGHOUT THE AREA ON WEDNESDAY...THOUGH
HIGHER HUMIDITY LEVELS MAY KEEP THE FIRE DANGER A LITTLE LOWER.

ISOLATED THUNDERSTORMS WILL BE POSSIBLE TUESDAY NIGHT AND
WEDNESDAY MORNING...THOUGH ANY STORMS DURING THIS PERIOD ARE NOT
EXPECTED TO BE SEVERE. THE CHANCE OF THUNDERSTORMS WILL INCREASE
IN SOUTH CENTRAL SOUTH DAKOTA BY LATE WEDNESDAY AFTERNOON...THEN
SPREAD EAST ACROSS THE REGION WEDNESDAY NIGHT. WIDESPREAD SEVERE
WEATHER IS NOT EXPECTED WITH THIS ACTIVITY. HOWEVER...A FEW
STRONGER STORMS ARE POSSIBLE FROM SOUTH CENTRAL SOUTH DAKOTA INTO
THE LOWER JAMES RIVER VALLEY DURING THE LATE AFTERNOON AND EARLY
EVENING ON WEDNESDAY.

.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.

$$





Extreme Fire Danger

RANGELAND FIRE DANGER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
436 AM CDT MON APR 21 2014

.DISCUSSION...
NORTHWESTERLY WINDS ARE EXPECTED TO INCREASE TO 20 TO 25 MPH BY THIS
AFTERNOON WITH GUSTS TO 35 MPH ACROSS MOST OF THE AREA. IN
ADDITION... WITH GOOD MIXING IN A DRYING ATMOSPHERE...AFTERNOON
RELATIVE HUMIDITY WILL RANGE FROM AROUND 20 TO 25 PERCENT...THOUGH
SLIGHTLY HIGHER OVER SOUTHWESTERN MINNESOTA. THIS WILL PRODUCE
EXTREME FIRE DANGER ACROSS ALL AREAS EXCEPT THE LOWER BRULE REGION IN
SOUTH CENTRAL SOUTH DAKOTA THIS AFTERNOON...WHERE WINDS SHOULD BE A
LITTLE LIGHTER THIS AFTERNOON. THE MOST CRITICAL FIRE DANGER PERIOD
WILL BE FROM EARLY AFTERNOON INTO EARLY THIS EVENING.

TUESDAY WILL BE ANOTHER DAY TO WATCH FOR FIRE WEATHER CONCERNS...
ESPECIALLY IN OUR CENTRAL AND WEST WITH SOUTHEAST-SOUTH LOW LEVEL
FLOW INCREASING THROUGH THE DAY AS SURFACE RIDGE SHIFTS EAST...AND
STRONG MIXING LEADING TO HUMIDITY LEVELS OF 20 TO 25 PERCENT. WINDS
AT THIS TIME LOOK TO REMAIN SHY OF RED FLAG CRITERIA...BUT WILL
LIKELY BE ANOTHER DAY OF VERY HIGH DANGER FOR PARTS OF OUR AREA...
MAINLY ALONG AND WEST OF THE JAMES RIVER VALLEY.

CONSIDER POSTPONING BURNING DUE TO THE VERY HIGH OR EXTREME FIRE
DANGER.

IAZ001-012-013-020-021-031-032-MNZ097-098-NEZ013-014-SDZ038>040-
052>056-059>062-065>071-212315-
LYON-SIOUX-OBRIEN-PLYMOUTH-CHEROKEE-WOODBURY-IDA-PIPESTONE-ROCK-
DIXON-DAKOTA-BEADLE-KINGSBURY-BROOKINGS-JERAULD-SANBORN-MINER-
LAKE-MOODY-DAVISON-HANSON-MCCOOK-MINNEHAHA-HUTCHINSON-TURNER-
LINCOLN-BON HOMME-YANKTON-CLAY-UNION-
INCLUDING THE CITIES OF...ROCK RAPIDS...GEORGE...INWOOD...
LARCHWOOD...ORANGE CITY...SIOUX CENTER...SHELDON...HARTLEY...
SANBORN...LE MARS...CHEROKEE...SIOUX CITY...IDA GROVE...
HOLSTEIN...BATTLE CREEK...PIPESTONE...LUVERNE...WAKEFIELD...
PONCA...ALLEN...SOUTH SIOUX CITY...HURON...DE SMET...ARLINGTON...
LAKE PRESTON...BROOKINGS...WESSINGTON SPRINGS...ALPENA...
WOONSOCKET...HOWARD...MADISON...FLANDREAU...MITCHELL...
ALEXANDRIA...EMERY...SALEM...CANISTOTA...BRIDGEWATER...MONTROSE...
SIOUX FALLS...PARKSTON...FREEMAN...MENNO...TRIPP...PARKER...
CENTERVILLE...MARION...VIBORG...HURLEY...CHANCELLOR...CANTON...
LENNOX...TEA...HARRISBURG...TYNDALL...SCOTLAND...SPRINGFIELD...
AVON...TABOR...YANKTON...VERMILLION...NORTH SIOUX CITY...
BERESFORD...ELK POINT...ALCESTER...JEFFERSON
436 AM CDT MON APR 21 2014

...EXTREME FIRE DANGER...

THE GRASSLAND FIRE DANGER INDEX WILL REACH THE EXTREME CATEGORY
THIS AFTERNOON. EXTREME WEATHER CONDITIONS OR A VERY LOW
MOISTURE CONTENT OF GRASSES...AND OTHER DRY ORGANIC MATERIAL
ON THE GROUND...INDICATE THAT CRITICAL BURNING CONDITIONS EXIST.
A FIRE WILL START EASILY AND HAS THE POTENTIAL TO BECOME LARGE
AND SPREAD QUICKLY BECOMING ERRATIC WITH EXTREME BEHAVIORAL
CHARACTERISTICS. NO OUTDOOR BURNING SHOULD TAKE PLACE.

THE OUTLOOK FOR TUESDAY AFTERNOON...THE GRASSLAND FIRE DANGER
INDEX WILL REACH THE HIGH CATEGORY TO VERY HIGH CATEGORY.

$$



Red Flag Warning

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE SIOUX FALLS SD
246 AM CDT MON APR 21 2014

IAZ300-301-MNZ900-NEZ249-SDZ256>258-211600-
/O.UPG.KFSD.FW.A.0002.140421T1800Z-140422T0000Z/
/O.NEW.KFSD.FW.W.0003.140421T1800Z-140422T0000Z/
NORTHERN LOESS HILLS AND FLOYD RIVER BASIN-
IOWA GREAT LAKES/ROCK AND LITTLE SIOUX BASINS-SOUTHWEST MINNESOTA-
EXTREME NORTHEAST NEBRASKA-MIDDLE JAMES RIVER VALLEY-
MIDDLE BIG SIOUX RIVER VALLEY-
LOWER JAMES RIVER TO LOWER BIG SIOUX RIVER VALLEY-
246 AM CDT MON APR 21 2014

...RED FLAG WARNING IN EFFECT FROM 1 PM THIS AFTERNOON TO 7 PM
CDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE
WEATHER ZONES 249...256...257...258...300...301 AND 900...

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A RED FLAG
WARNING FOR WIND AND LOW RELATIVE HUMIDITY...WHICH IS IN EFFECT
FROM 1 PM THIS AFTERNOON TO 7 PM CDT THIS EVENING. THE FIRE
WEATHER WATCH IS NO LONGER IN EFFECT.

* AFFECTED AREA...IN IOWA...FIRE WEATHER ZONES 300 AND 301. IN
  MINNESOTA...FIRE WEATHER ZONE 900. IN NEBRASKA...FIRE WEATHER
  ZONE 249. IN SOUTH DAKOTA...FIRE WEATHER ZONES 256...257 AND
  258.

* WINDS...NORTHWEST 20 TO 25 MPH WITH GUSTS UP TO 35 MPH.

* RELATIVE HUMIDITY...AS LOW AS 21 PERCENT.

* IMPACTS...THE POTENTIAL EXISTS FOR FAST MOVING AND INTENSE
  GRASSLAND FIRES.

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
CAN CONTRIBUTE TO EXTREME FIRE BEHAVIOR.

&&

$$







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Page last modified: May 16, 2007
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