Red Flag Warning 1, NWS Sioux Falls, SD

Issued

Apr 30, 2007, 1:58 PM CDT (18:58 UTC)

Expired

Apr 30, 2007, 7:00 PM CDT

In force

5 hr

Issued by

NWS Sioux Falls, SD

000 
WWUS83 KFSD 301858
RFWFSD

RED FLAG WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
158 PM CDT MON APR 30 2007

...RED FLAG WARNING FOR EXTREME SOUTHEAST SOUTH DAKOTA...NORTHEAST
NEBRASKA AND NORTHWEST IOWA THIS AFTERNOON...

.AREAS AHEAD OF LOW PRESSURE SLIDING ACROSS SOUTHEAST SOUTH DAKOTA
AT EARLY AFTERNOON WILL FIND UNSEASONABLE WARMTH...ALONG WITH LOW
RELATIVE HUMIDITIES AND SOUTHWEST WINDS OF 20 TO 35 MPH. THIS WILL
CREATE ESPECIALLY HAZARDOUS FIRE BEHAVIOR THIS AFTERNOON. THESE
CONDITIONS WILL BE FOUND IN AREAS SOUTHEAST OF A LINE FROM YANKTON...
TO SIOUX FALLS...TO SPIRIT LAKE. A RED FLAG WARNING IS ISSUED
WHEN ALL THREE OF THE FOLLOWING CONDITIONS ARE MET OR IMMINENT:

SUSTAINED ONE MINUTE WINDS OF 25 MPH OR GREATER.
RELATIVE HUMIDITY AT 25 PERCENT OR LESS.
TEMPERATURES EQUAL OR EXCEEDING 75 DEGREES F.

HANDLE ALL FIRE WITH CAUTION...A LITTLE FLAME CAN GO A LONG WAY
THIS AFTERNOON. PLEASE ADVISE APPROPRIATE OFFICIALS AND FIRE CREWS
IN THE FIELD OF THIS RED FLAG WARNING.

IAZ300-301-NEZ249-SDZ258-010000-
/O.NEW.KFSD.FW.W.0001.070430T1858Z-070501T0000Z/
NORTHERN LOESS HILLS AND FLOYD RIVER BASIN-
IOWA GREAT LAKES/ROCK AND LITTLE SIOUX BASINS-
EXTREME NORTHEAST NEBRASKA-
LOWER JAMES RIVER TO LOWER BIG SIOUX RIVER VALLEY-
158 PM CDT MON APR 30 2007

...RED FLAG WARNING IN EFFECT UNTIL 7 PM CDT THIS EVENING FOR VERY
WARM TEMPERATURES...STRONG SOUTHWEST WINDS...AND DRY RELATIVE
HUMIDITIES FOR EXTREME SOUTHEAST SOUTH DAKOTA...NORTHEAST
NEBRASKA...AND NORTHWEST IOWA...

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

TEMPERATURES WILL SOAR INTO THE LOWER 90S THIS AFTERNOON...WITH
GUSTY SOUTHWEST WINDS FROM 20 TO 35 MPH...AND RELATIVE HUMIDITIES
OF 20 TO 25 PERCENT. THIS WILL CREATE CRITICAL FIRE BEHAVIOR
CONDITIONS.

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

000 
WWUS83 KFSD 010000
RFWFSD

RED FLAG WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
700 PM CDT MON APR 30 2007

IAZ300-301-NEZ249-SDZ258-010100-
/O.EXP.KFSD.FW.W.0001.000000T0000Z-070501T0000Z/
NORTHERN LOESS HILLS AND FLOYD RIVER BASIN-
IOWA GREAT LAKES/ROCK AND LITTLE SIOUX BASINS-
EXTREME NORTHEAST NEBRASKA-
LOWER JAMES RIVER TO LOWER BIG SIOUX RIVER VALLEY-
700 PM CDT MON APR 30 2007

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


TEMPERATURES AND WIND SPEEDS ARE EXPECTED TO DROP OFF SHORTLY
AFTER SUNSET...WITH RISING RELATIVE HUMIDITY VALUES THROUGH THE
EARLY EVENING HOURS. THEREFORE THE RED FLAG WARNING WILL BE
ALLOWED TO EXPIRE.



$$

Red Flag Warnings in South Dakota, 2007Red Flag Warnings in Nebraska, 2007Red Flag Warnings in Iowa, 2007Every red flag warning in 2007

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