Flash Flood Warning 48, NWS Sioux Falls, SD

736 
WGUS73 KFSD 292050
FFSFSD

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
350 PM CDT THU JUL 29 2010

SDC009-023-043-067-292101-
/O.CAN.KFSD.FF.W.0048.000000T0000Z-100730T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CHARLES MIX SD-DOUGLAS SD-HUTCHINSON SD-BON HOMME SD-
350 PM CDT THU JUL 29 2010

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR BON HOMME...
SOUTHWESTERN HUTCHINSON...SOUTHEASTERN DOUGLAS AND EASTERN CHARLES
MIX COUNTIES IS CANCELLED...

EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA. STREAMS
AND CREEKS IN THE WARNED AREA HAVE RECEDED OR WERE BEGINNING TO
RECEDE...ENDING THE FLOOD THREAT. IF FLOODING HAS BEEN OBSERVED...
PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT AGENCY.

LAT...LON 4221 9630 4227 9635 4228 9644 4253 9703
      4275 9702 4277 9713 4285 9724 4285 9756
      4286 9761 4313 9761 4263 9645

$$

IAC149-193-NEC043-051-SDC027-127-135-300030-
/O.CON.KFSD.FF.W.0048.000000T0000Z-100730T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PLYMOUTH IA-WOODBURY IA-DAKOTA NE-DIXON NE-YANKTON SD-UNION SD-
CLAY SD-
350 PM CDT THU JUL 29 2010

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR SOUTHERN CLAY...SOUTHERN
UNION...YANKTON...NORTHERN DIXON...DAKOTA...WESTERN WOODBURY AND
SOUTHWESTERN PLYMOUTH COUNTIES UNTIL 730 PM CDT...

AT 342 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA. 
DOPPLER RADAR ESTIMATES AND OBSERVER REPORTS SHOW THAT 1 TO 3 INCHES 
OF RAIN HAS FALLEN ALONG A LINE FROM TRIPP TO TYNDALL TO YANKTON TO 
VERMILLION TO SIOUX CITY. MOST OF THE HEAVY RAINFALL HAS ENDED...BUT 
AREAS FROM VERMILLION TO SIOUX CITY COULD STILL RECEIVE ANOTHER ONE 
QUARTER TO ONE HALF INCH THROUGH 500 PM CDT. RUNOFF FROM THE EARLIER 
HEAVY RAINS SHOULD BE DIMINISHING RAPIDLY THROUGH LATE AFTERNOON.

SHOWERS AND THUNDERSTORMS ARE PRODUCING LOCALLY HEAVY RAINFALL IN 
THE WARNED AREA. RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE 
FLASH FLOODING TO OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE 
FLOODING INCLUDE...PONCA...VERMILLION...YANKTON...DAKOTA CITY...ELK 
POINT...HOMER...HUBBARD...JACKSON...JEFFERSON...LEWIS AND CLARK STATE
RECREATION AREA...MARTINSBURG...MASKELL...MECKLING...MISSION 
HILL...NEWCASTLE...NORTH SIOUX CITY...SOUTH SIOUX CITY...STONE STATE 
PARK AND UTICA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM THESE STORMS WILL CAUSE FLOODING OF SMALL 
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY... 
COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND 
OTHER LOW LYING AREAS ARE ALSO SUBJECT TO FLOODING.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.

&&

LAT...LON 4221 9630 4227 9635 4228 9644 4253 9703
      4275 9702 4277 9713 4285 9724 4285 9756
      4286 9761 4313 9761 4263 9645

$$

GILLISPIE

677 
WGUS73 KFSD 292308
FFSFSD

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
608 PM CDT THU JUL 29 2010

IAC149-193-NEC043-051-SDC027-127-135-292321-
/O.CAN.KFSD.FF.W.0048.000000T0000Z-100730T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PLYMOUTH IA-WOODBURY IA-DAKOTA NE-DIXON NE-YANKTON SD-UNION SD-
CLAY SD-
608 PM CDT THU JUL 29 2010

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR SOUTHERN CLAY...
SOUTHERN UNION...SOUTHERN YANKTON...NORTHERN DIXON...DAKOTA...WESTERN
WOODBURY AND SOUTHWESTERN PLYMOUTH COUNTIES IS CANCELLED...

HEAVY RAINFALL AND EXCESS RUNOFF FROM THE RAIN HAS ENDED OVER THE 
WARNED AREA.  WATER ON ROADWAYS AND STREAMS AND CREEKS IN THE WARNED 
AREA HAVE RECEDED OR WERE BEGINNING TO RECEDE...ENDING THE FLOOD 
THREAT. IF FLOODING HAS BEEN OBSERVED...PLEASE REPORT IT TO YOUR 
LOCAL LAW ENFORCEMENT AGENCY.

LAT...LON 4221 9630 4227 9635 4228 9644 4253 9703
      4275 9702 4277 9713 4285 9724 4285 9756
      4286 9761 4313 9761 4263 9645

$$


WILLIAMS

AREA FORECAST DISCUSSION FOR SOUTHEAST SD/SOUTHWEST MN/NORTHWEST IA
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1034 AM CDT THU JUL 29 2010

.DISCUSSION...
AREA OF ELEVATED SHOWERS AND THUNDERSTORMS OVER CENTRAL SOUTH DAKOTA
CONTINUES TO SLOWLY WORK EASTWARD LATE THIS MORNING. INCREASED POPS
FROM THE JAMES VALLEY TO AROUND SIOUX FALLS FOR THE MORNING INTO THE
EARLY AFTERNOON. NEEDLESS TO SAY...THE EXTENSIVE CLOUD COVER COMING
FROM THIS ACTIVITY IS PUTTING THE KABASH ON TEMPERATURES...AND WILL
LIKELY DO SO INTO THE AFTERNOON. ALREADY SLOWED THE DIURNAL RISE FOR
THIS MORNING...BUT MAY NEED TO DECREASE HIGHS A BIT TO ACCOUNT FOR
THE ADDITIONAL CLOUD COVER.

FOR THE AFTERNOON INTO TONIGHT...TOUGH CALL BUT WE STILL LOOK ON
TARGET FOR THUNDERSTORMS...SOME OF WHICH COLD BE SEVERE...MAINLY
WEST OF THE JAMES...AND A FEW THAT COULD CONTAIN HEAVY
RAINFALL...PRETTY MUCH OVER SOUTHEAST SD INTO SW MN. MODELS PRETTY
MUCH CLUELESS ON CURRENT ACTIVITY AND WITH THE LACK OF PROFILER
INFORMATION AT NLG AND MRR IMPOSSIBLE TO TELL WHETHER OR NOT INFLOW
INTO THIS IS INCREASING OR DECREASING...SO UNFORTUNATELY AT THE WHIM
OF THE MODELS WITH THIS ONE. PWAT VALUES CLIMB TO ABOUT 1.50-1.75
INCHES SO PRETTY DARN JUICY. THE LOWEST LEVELS ARE A LITTLE DRIER
THAN THE LAST COUPLE OF EVENTS HOWEVER...SO HOPEFULLY CAN AVOID THE
WIDESPREAD 3 TO 5 INCH RAINS. THE OVERALL SEVERE THREAT LOOKS
MINIMAL WITH THE 0 TO 6 KM BULK SHEAR AROUND 35 TO 40 KNOTS AND CAPE
VALUES KINDA THIN AND RUNNING ABOUT 1000-1500 J/KG. CONFIDENCE JUST
NOT QUITE THERE YET FOR A POTENTIAL FLASH FLOOD THREAT...BUT ONE MAY
STILL BE NEEDED IF SOMETHING MORE ORGANIZED CAN DEVELOP BEHIND THIS
CURRENT ACTIVITY. /08

&&

.AVIATION...
GENERAL VFR CONDITIONS ACROSS THE AREA THROUGH 21Z...OUTSIDE OF AN
ISOLATED SHOWER/THUNDERSTORM IN THE JAMES RIVER VALLEY WHICH WOULD
LOCALLY LOWER CEILINGS/VISIBILITIES. COVERAGE OF SHOWERS AND
THUNDERSTORMS WILL INCREASE FROM WEST TO EAST ACROSS THE AREA AFTER
21Z THIS AFTERNOON...BECOMING MORE LIKELY AFTER 00Z...WITH LOWERING
CIGS/VISBYS IN THUNDERSTORM ACTIVITY BECOMING MORE WIDESPREAD
OVERNIGHT.

&&

.PREV DISCUSSION...
TRW- TRYING TO DEVELOP S OF MO RVR ALONG MID LVL FNT AND NOSE OF
WAA. THIS BNDRY WL CONT TO LIFT SLOWLY N TODAY AND WL NEED TO KEEP
CHC OF TRW IN FCST MAINLY W OF I29 WITH BEST CHC ACRS SWRN CWA. THIS
MAY BE PERSISTENT THRU MUCH OF THE DAY AS WEAK S/W MOVES ALONG SD/NE
BORDER. MORE EXTENSIVE CLOUD COVER EXPECTED TODAY BUT ENUF BREAKS
SHUD ALLOW TEMPS TO GET CLOSE TO YESTERDAY'S HIGHS.

TONIGHT SHUD SEE MORE WDSPRD TRW ACTIVITY AS SFC BNDRY LIFTS N INTO
FAR SRN CWA WHILE ANOTHER S/W MOVES EWD OUT OF THE WRN HIGHS PLAINS.
WUD EXPECT SCT TRW TO FIRE UP ACRS WRN HIGH PLAINS DURG THE AFTN AND
THEN LIKELY EVOLVE INTO AN MCS DURING THE NIGHT WITH INCREASING LLJ
AND DEEP MOISTURE RETURN. SO WL GO WITH HIGH POPS ACRS ENTIRE CWA
TONIGHT WITH BEST CHC ALONG AND N OF I90.

CUD SEE A FEW SVR STORMS LATE THIS AFTN AND EVE ACRS WRN
CWA...HOWEVER THE MAIN THREAT SHUD EVOLVE INTO HVY RAIN PSBLTY AFTER
SS AS IT MOVES EWD TOWARDS I29 AND THEN INTO MN AND NW IA. CUD AGAIN
SEE A WDSPRD AREA OF 1 TO 2 INCHES OF RAIN WITH THIS FEATURE WITH
LOCALLY HEAVIER AMOUNTS.

THIS S/W SHUD EXIT SERN CWA FRI MORN...BUT WITH WEAK SFC FNT LAGGING
BEHIND...CUD SEE MORE REDEVELOPMENT DURING THE AFTN ACRS NW IA WITH
SVR STORMS PSBL.

WL NOT CHANGE TEMPS FCST MUCH FOR FRI...BUT CUD BE COOLER ESPEC ERN
CWA IF WDSPRD STRATUS FIELD DEVELOPS ON BACKSIDE OF TONIGHT'S
COMPLEX.

MOST OF THE WEEKEND LOOKS DRY AND WARM AND HUMID...BUT CUD SEE SCT
TRW DEVELOPING MAINLY SUN NITE INTO MON WITH NEXT WAVE. DOESNT LOOK
LIKE MUCH CHANGE IN THE PATTERN THRU NEXT WEEK WITH WARM AND HUMID
CONDITIONS EXPECTED AND PERIODIC CHANCES FOR TRW.

&&

.FSD WATCHES/WARNINGS/ADVISORIES...

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

&&

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1110 AM CDT THU JUL 29 2010

SDZ038>040-050-052>071-MNZ071-072-080-081-089-090-097-098-
IAZ001>003-012>014-020>022-031-032-NEZ013-014-301200-
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-
1110 AM CDT THU JUL 29 2010

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

.DAY ONE...TODAY AND TONIGHT

THUNDERSTORMS...
SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS WILL CONTINUE TO
SLOWLY PROGRESS EAST INTO THE AFTERNOON. SOME PATCHY HEAVIER RAIN
AMOUNTS WILL BE POSSIBLE...MAINLY WEST OF INTERSTATE 29...WITH A
HALF TO THREE QUARTERS OF AN INCH OF RAIN POSSIBLE. AS THIS
ACTIVITY WEAKENS AND MOVES NORTHEAST...ANOTHER ROUND OF SHOWERS
AND THUNDERSTORMS WILL BE POSSIBLE...WITH THIS ACTIVITY POSING A
HIGHER THREAT FOR HEAVY RAIN AND SEVERE WEATHER. HAIL TO THE SIZE
OF HALF DOLLARS WILL BE THE MAIN THREAT FROM THESE STORMS AND
THEY SHOULD BE CONFINED TO AREAS MAINLY WEST OF THE JAMES RIVER.
THE HEAVY RAIN THREAT WILL BE HIGHEST MAINLY AFTER ABOUT 1000 PM
CDT AND NORTH OF INTERSTATE 90 INTO SOUTHWEST MINNESOTA.

FLOODING...
HEAVY RAINFALL LAST WEEK HAS PRODUCED AREAS OF RIVER FLOODING
ALONG THE VERMILLION...BIG SIOUX AND LITTLE SIOUX. FLOODING
CONTINUES ALONG THE JAMES RIVER.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

THERE WILL BE A LINGERING CHANCE OF THUNDERSTORMS ACROSS THE AREA
FRIDAY MORNING...WITH ADDITIONAL THUNDERSTORM REDEVELOPMENT
POSSIBLE EAST OF INTERSTATE 29 FRIDAY AFTERNOON. A FEW OF THESE
STORMS COULD BECOME SEVERE FRIDAY AFTERNOON ACROSS NORTHWEST
IOWA.

THERE WILL BE A CHANCE FOR THUNDERSTORM REDEVELOPMENT FRIDAY
AFTERNOON ACROSS NORTHWEST IOWA AHEAD OF A COLD FRONT. IF STORMS
DO DEVELOP...A FEW COULD BECOME SEVERE.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL BE POSSIBLE AFTER 600 PM CDT.

&&

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