HYDROLOGIC OUTLOOK
Issue Date: 529 AM CST WED DEC 23 2009
Expiration: 530 PM CST WED DEC 23 2009 ...FLOODING RESULTING FROM SIGNIFICANT RAINFALL...ALONG WITH
SNOW MELT AND ICE JAMS...POSSIBLE WEDNESDAY AND THURSDAY...
A PRODIGIOUS LOW PRESSURE SYSTEM WILL BRING THE POSSIBILITY OF
FLOODING TO CENTRAL AND ESPECIALLY SOUTHERN IOWA THROUGH THURSDAY
EVENING. PRECIPITATION TYPE WILL BE A MAJOR DRIVING FORCE IN THE
FLOODING THREAT. AREAS OF FREEZING RAIN AND DRIZZLE ARE POSSIBLE
TODAY AND TONIGHT OVER CENTRAL PORTIONS OF THE AREA...WITH
GENERALLY RAIN AND ISOLATED THUNDERSTORMS EXPECTED OVER FAR
SOUTHERN IOWA. RAINFALL AMOUNTS OF A HALF INCH TO NEARLY TWO
INCHES ARE ANTICIPATED THROUGH THURSDAY NIGHT.
THE COMBINATION OF ABOVE FREEZING TEMPERATURES...ALONG WITH
SEASONALLY MODERATE TO HEAVY RAINFALL...WILL LEAD TO A POTENTIALLY
SIGNIFICANT AMOUNT OF SNOW MELT AND RUNOFF INTO AREA STREAMS.
LOCALIZED FLOODING MAY ALSO OCCUR IN OTHER AREAS...SUCH AS URBAN
AREAS...WHERE THE DRAINAGE SYSTEMS MAY BE IMPAIRED DUE TO SNOW AND
ICE CLOGGED INTAKES.
ANOTHER CONCERN IS BREAK UP ICE JAMS ON AREA RIVERS. ESTIMATED RIVER
ICE DEPTHS RANGE FROM 2 INCHES IN SOUTHEAST IOWA...TO 6 INCHES IN
CENTRAL IOWA. THE RUNOFF WILL LIKELY BE ENOUGH TO BREAK UP THE ICE
ESPECIALLY AS ONE MOVES SOUTHWARD. SINCE THE RIVER ICE IS
RELATIVELY THIN...THOUGH...ONLY MINOR...LOCALIZED PROBLEMS DUE TO
ICE JAMS ARE EXPECTED.
RIVERS MOST LIKELY TO BE AFFECTED INCLUDE THE CHARITON...DES
MOINES RIVER FROM DES MOINES DOWNSTREAM...AS WELL AS THE SOUTH
SKUNK...CEDAR CREEK...AND THE THOMPSON RIVERS. OTHER SMALLER
STREAMS AND CREEKS MAY ALSO BE AFFECTED.
KEEP CURRENT ON THE LATEST FORECASTS...INCLUDING POSSIBLE WATCHES
AND WARNINGS.
$$
PODRAZIK/ZOGG
HAZARDOUS WEATHER OUTLOOK
Issue Date: 529 AM CST WED DEC 23 2009
Expiration: 530 AM CST THU DEC 24 2009 Expires:200912241130;;
FLUS43 KDMX 231122
HWODMX
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DES MOINES IA
522 AM CST WED DEC 23 2009
IAZ061-073-081>083-092>094-241130-
JASPER-WARREN-ADAMS-UNION-CLARKE-TAYLOR-RINGGOLD-DECATUR-
522 AM CST WED DEC 23 2009
THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA.
.DAY ONE...TODAY AND TONIGHT
AREAS OF FREEZING DRIZZLE WITH INTENSIFY THROUGHOUT THE DAY TODAY
INTO THE POTENTIAL FOR FREEZING RAIN. HOWEVER...WARMER AIR WILL
ALSO MOVE INTO SOUTHERN IOWA...LEADING TO THE POTENTIAL FOR MUCH
OF THE AREA TO RECEIVE ALL RAIN THROUGHOUT MUCH OF THE DAY TODAY
AND INTO THIS EVENING.
.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY
A WINTER STORM WATCH IS IN EFFECT FOR THE AREA FROM THURSDAY
AFTERNOON THROUGH FRIDAY NIGHT. PLEASE REFER TO THE NATIONAL
WEATHER SERVICE WEBSITE AT WEATHER.GOV/DESMOINES FOR FURTHER
DETAILS.
A VERY STRONG LOW PRESSURE SYSTEM IS FORECAST TO SLOWLY APPROACH
THE STATE AND BRING A WINTRY MIX OF SNOW...SLEET...AND FREEZING
RAIN TO THE AREA BY THURSDAY AFTERNOON. THURSDAY NIGHT INTO FRIDAY
MORNING...LOOK FOR THE PRECIPITATION TO CHANGE OVER TO ALL SNOW.
MODERATE SNOW AND ICE ACCUMULATIONS ARE POSSIBLE.
.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION WILL NOT BE NEEDED...BUT ANY SNOWFALL AND ICE
ACCUMULATION REPORTS ARE APPRECIATED AND ENCOURAGED.
AN EMERGENCY MANAGER CONFERENCE CALL IS SCHEDULED AT 11AM CST
WEDNESDAY MORNING.
$$
WINTER WEATHER ADVISORY
Issue Date: 507 AM CST WED DEC 23 2009
Expiration: 300 PM CST WED DEC 23 2009 ...ICY CONDITIONS TONIGHT...FOLLOWED BY A MAJOR WINTER STORM
WEDNESDAY THROUGH FRIDAY...
.ICY CONDITIONS WILL AFFECT OUR REGION TONIGHT INTO WEDNESDAY.
THEN...AN APPROACHING LOW PRESSURE SYSTEM WILL BRING RAIN AND A
MIX OF WINTRY WEATHER STATEWIDE THROUGH FRIDAY. HEAVY
PRECIPITATION IS EXPECTED AT TIMES FROM WEDNESDAY ONWARD...
FOLLOWED BY STRONG WINDS ON THURSDAY AND FRIDAY.
IAZ061-073-081>083-231600-
/O.CAN.KDMX.ZR.Y.0001.000000T0000Z-091223T1800Z/
/O.NEW.KDMX.WW.Y.0026.091223T1107Z-091223T2100Z/
/O.EXB.KDMX.WS.A.0007.091224T1800Z-091226T0600Z/
JASPER-WARREN-ADAMS-UNION-CLARKE-
INCLUDING THE CITIES OF...NEWTON...INDIANOLA...CORNING...
CRESTON...OSCEOLA
507 AM CST WED DEC 23 2009
...WINTER WEATHER ADVISORY IN EFFECT UNTIL 3 PM CST THIS
AFTERNOON...
...WINTER STORM WATCH IN EFFECT FROM THURSDAY AFTERNOON THROUGH
FRIDAY EVENING...
...FREEZING RAIN ADVISORY IS CANCELLED...
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A WINTER
WEATHER ADVISORY FOR FREEZING RAIN AND FREEZING RAIN AND SLEET...WHICH
IS IN EFFECT UNTIL 3 PM CST THIS AFTERNOON. A WINTER STORM WATCH
HAS ALSO BEEN ISSUED. THIS WINTER STORM WATCH IS IN EFFECT FROM
THURSDAY AFTERNOON THROUGH FRIDAY EVENING. THE FREEZING RAIN
ADVISORY HAS BEEN CANCELED.
...WINTER WEATHER ADVISORY...
* SHORT TERM TRENDS...AN AREA OF SHOWERS...AND EVEN A FEW
THUNDERSTORMS...OVER KANSAS AND MISSOURI WILL ADVANCE NORTHWARD
INTO SOUTHERN IOWA THIS MORNING. AS IT DOES THE PRECIPITATION
WILL SWITCH TO A MORE WINTER VARIETY BECOMING FREEZING RAIN AND
THEN EVENTUALLY SLEET OR SNOW BY THE TIME IT HITS CENTRAL IOWA
TOWARD MIDDAY. UP TO A TENTH OF AN INCH OF ICE...AND AN INCH OR
LESS OF SNOW MAY ACCUMULATE BY THROUGH THIS EVENING.
...WINTER STORM WATCH...
* LONG TERM TRENDS...THE PRECIPITATION SHOULD SWITCH TO MAINLY
RAIN LATE TONIGHT AND EARLY THURSDAY BEFORE TRANSITIONING BACK
TO A WINTRY MIX AND EVENTUALLY ALL SNOW LATE THURSDAY. ONCE IT
DOES THE SNOW MAY BE HEAVY AND WIND BLOWN...ESPECIALLY INTO
FRIDAY WHEN THE WINDS INCREASE.
* STORM TOTAL SNOW ACCUMULATIONS...BY THE TIME THE PRECIPITATION
DIMINISHES SATURDAY...THREE TO SIX INCHES OF SNOW IS EXPECTED.
* WINDS...BRISK EAST WINDS OF 15 TO 25 MPH WILL BE COMMON
WEDNESDAY INTO THURSDAY. BY FRIDAY...WINDS WILL BECOME
NORTHWEST AT 25 TO 35 MPH WITH HIGHER GUSTS.
* VISIBILITY...DURING THE PERIODS OF HEAVIER SNOW LATE THURSDAY
AND FRIDAY...VISIBILITIES WILL GENERALLY BE LESS THAN ONE MILE
AND EVEN DOWN TO A QUARTER MILE DURING THE HEAVIEST SNOWS. WITH
INCREASING WINDS AND SNOW COINCIDENT BY FRIDAY...BLOWING SNOW
AND GREATLY REDUCED VISIBILITIES NEAR BLIZZARD CONDITIONS ARE
POSSIBLE.
* IMPACTS...TRAVEL WILL BECOME INCREASINGLY DIFFICULT IN THE WATCH
AREA ON ON CHRISTMAS EVE NIGHT AND CHRISTMAS DAY AS SNOW
ACCUMULATES AND WINDS INCREASE. IN THE HEAVIEST SNOW AREAS...
TRAVEL MAY BECOME NEARLY IMPOSSIBLE DUE TO BLOWING AND DRIFTING
SNOW THURSDAY NIGHT INTO FRIDAY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR
FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR
SLIPPERY ROADS AND LIMITED VISIBILITY...AND USE CAUTION WHILE
DRIVING.
A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT
SNOW...SLEET...OR ICE ACCUMULATIONS THAT MAY IMPACT TRAVEL.
CONTINUE TO MONITOR THE LATEST FORECASTS.
$$
WINTER STORM WATCH
Issue Date: 507 AM CST WED DEC 23 2009
Expiration: 1200 AM CST SAT DEC 26 2009 ...ICY CONDITIONS TONIGHT...FOLLOWED BY A MAJOR WINTER STORM
WEDNESDAY THROUGH FRIDAY...
.ICY CONDITIONS WILL AFFECT OUR REGION TONIGHT INTO WEDNESDAY.
THEN...AN APPROACHING LOW PRESSURE SYSTEM WILL BRING RAIN AND A
MIX OF WINTRY WEATHER STATEWIDE THROUGH FRIDAY. HEAVY
PRECIPITATION IS EXPECTED AT TIMES FROM WEDNESDAY ONWARD...
FOLLOWED BY STRONG WINDS ON THURSDAY AND FRIDAY.
IAZ061-073-081>083-231600-
/O.CAN.KDMX.ZR.Y.0001.000000T0000Z-091223T1800Z/
/O.NEW.KDMX.WW.Y.0026.091223T1107Z-091223T2100Z/
/O.EXB.KDMX.WS.A.0007.091224T1800Z-091226T0600Z/
JASPER-WARREN-ADAMS-UNION-CLARKE-
INCLUDING THE CITIES OF...NEWTON...INDIANOLA...CORNING...
CRESTON...OSCEOLA
507 AM CST WED DEC 23 2009
...WINTER WEATHER ADVISORY IN EFFECT UNTIL 3 PM CST THIS
AFTERNOON...
...WINTER STORM WATCH IN EFFECT FROM THURSDAY AFTERNOON THROUGH
FRIDAY EVENING...
...FREEZING RAIN ADVISORY IS CANCELLED...
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A WINTER
WEATHER ADVISORY FOR FREEZING RAIN AND FREEZING RAIN AND SLEET...WHICH
IS IN EFFECT UNTIL 3 PM CST THIS AFTERNOON. A WINTER STORM WATCH
HAS ALSO BEEN ISSUED. THIS WINTER STORM WATCH IS IN EFFECT FROM
THURSDAY AFTERNOON THROUGH FRIDAY EVENING. THE FREEZING RAIN
ADVISORY HAS BEEN CANCELED.
...WINTER WEATHER ADVISORY...
* SHORT TERM TRENDS...AN AREA OF SHOWERS...AND EVEN A FEW
THUNDERSTORMS...OVER KANSAS AND MISSOURI WILL ADVANCE NORTHWARD
INTO SOUTHERN IOWA THIS MORNING. AS IT DOES THE PRECIPITATION
WILL SWITCH TO A MORE WINTER VARIETY BECOMING FREEZING RAIN AND
THEN EVENTUALLY SLEET OR SNOW BY THE TIME IT HITS CENTRAL IOWA
TOWARD MIDDAY. UP TO A TENTH OF AN INCH OF ICE...AND AN INCH OR
LESS OF SNOW MAY ACCUMULATE BY THROUGH THIS EVENING.
...WINTER STORM WATCH...
* LONG TERM TRENDS...THE PRECIPITATION SHOULD SWITCH TO MAINLY
RAIN LATE TONIGHT AND EARLY THURSDAY BEFORE TRANSITIONING BACK
TO A WINTRY MIX AND EVENTUALLY ALL SNOW LATE THURSDAY. ONCE IT
DOES THE SNOW MAY BE HEAVY AND WIND BLOWN...ESPECIALLY INTO
FRIDAY WHEN THE WINDS INCREASE.
* STORM TOTAL SNOW ACCUMULATIONS...BY THE TIME THE PRECIPITATION
DIMINISHES SATURDAY...THREE TO SIX INCHES OF SNOW IS EXPECTED.
* WINDS...BRISK EAST WINDS OF 15 TO 25 MPH WILL BE COMMON
WEDNESDAY INTO THURSDAY. BY FRIDAY...WINDS WILL BECOME
NORTHWEST AT 25 TO 35 MPH WITH HIGHER GUSTS.
* VISIBILITY...DURING THE PERIODS OF HEAVIER SNOW LATE THURSDAY
AND FRIDAY...VISIBILITIES WILL GENERALLY BE LESS THAN ONE MILE
AND EVEN DOWN TO A QUARTER MILE DURING THE HEAVIEST SNOWS. WITH
INCREASING WINDS AND SNOW COINCIDENT BY FRIDAY...BLOWING SNOW
AND GREATLY REDUCED VISIBILITIES NEAR BLIZZARD CONDITIONS ARE
POSSIBLE.
* IMPACTS...TRAVEL WILL BECOME INCREASINGLY DIFFICULT IN THE WATCH
AREA ON ON CHRISTMAS EVE NIGHT AND CHRISTMAS DAY AS SNOW
ACCUMULATES AND WINDS INCREASE. IN THE HEAVIEST SNOW AREAS...
TRAVEL MAY BECOME NEARLY IMPOSSIBLE DUE TO BLOWING AND DRIFTING
SNOW THURSDAY NIGHT INTO FRIDAY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR
FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR
SLIPPERY ROADS AND LIMITED VISIBILITY...AND USE CAUTION WHILE
DRIVING.
A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT
SNOW...SLEET...OR ICE ACCUMULATIONS THAT MAY IMPACT TRAVEL.
CONTINUE TO MONITOR THE LATEST FORECASTS.
$$
FREEZING RAIN ADVISORY
Issue Date: 408 PM CST TUE DEC 22 2009
Expiration: 1200 PM CST WED DEC 23 2009 ...ICY CONDITIONS TONIGHT...FOLLOWED BY A MAJOR WINTER STORM
WEDNESDAY THROUGH FRIDAY...
.ICY CONDITIONS WILL AFFECT OUR REGION TONIGHT INTO WEDNESDAY.
THEN...AN APPROACHING LOW PRESSURE SYSTEM WILL BRING US RAIN AND A
MIX OF WINTRY WEATHER STATEWIDE THROUGH FRIDAY. HEAVY
PRECIPITATION IS EXPECTED AT TIMES FROM WEDNESDAY
ONWARD...FOLLOWED BY STRONG WINDS ON THURSDAY AND FRIDAY.
IAZ061-062-072>075-081>084-230615-
/O.EXB.KDMX.ZR.Y.0001.091223T0300Z-091223T1800Z/
JASPER-POWESHIEK-MADISON-WARREN-MARION-MAHASKA-ADAMS-UNION-CLARKE-
LUCAS-
INCLUDING THE CITIES OF...NEWTON...GRINNELL...WINTERSET...
INDIANOLA...KNOXVILLE...OSKALOOSA...CORNING...CRESTON...OSCEOLA...
CHARITON
408 PM CST TUE DEC 22 2009
...FREEZING RAIN ADVISORY IN EFFECT FROM 9 PM THIS EVENING TO
NOON CST WEDNESDAY...
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A FREEZING
RAIN ADVISORY...WHICH IS IN EFFECT FROM 9 PM THIS EVENING TO NOON
CST WEDNESDAY.
...FREEZING RAIN ADVISORY...
* TIMING...FREEZING DRIZZLE WILL SPREAD SOUTHWARD WITH
TIME...INTO CENTRAL AND SOUTHERN IOWA BY LATE THIS EVENING.
* TOTAL ICE ACCUMULATIONS...AROUND A TENTH OF AN INCH OF ICE
ACCUMULATION IS EXPECTED THROUGH MIDDAY WEDNESDAY.
* VISIBILITY...THE FREEZING DRIZZLE WILL COMBINE WITH AREAS OF
FOG TO REDUCE VISIBILITIES TO LESS THAN ONE MILE IN AREAS.
* IMPACTS...TRAVEL WILL BE HAZARDOUS WITH AREAS OF BLACK ICE...
ESPECIALLY ON LESS TREATED ROADS. IT WILL TAKE ONLY VERY MINOR
ICE ACCUMULATIONS TO CAUSE TRAVEL DIFFICULTIES. IN ADDITION...
THE ICE CAN BE DIFFICULT TO SEE ON THE ROAD...SO A ROAD THAT
APPEARS TO BE CLEAR MAY ACTUALLY BE ICY.
...WINTER STORM WATCH...
* TIMING...ALTHOUGH FREEZING DRIZZLE OR LIGHT FREEZING RAIN MAY
OCCUR THROUGH TONIGHT AND WEDNESDAY MORNING...THE MOST
SIGNIFICANT IMPACTS WITH THIS STORM SHOULD OCCUR FROM WEDNESDAY
AFTERNOON THROUGH FRIDAY.
* STORM TOTAL ICE ACCUMULATIONS...ICING OF UP TO ONE QUARTER OF AN
INCH IS EXPECTED NEAR THE INTERSTATE 80 CORRIDOR THROUGH
THURSDAY...WITH LESSER AMOUNTS TO THE SOUTH.
* STORM TOTAL SNOW ACCUMULATIONS...THE PRECIPITATION SHOULD
BECOME PRIMARILY SNOW LATE THURSDAY INTO FRIDAY WITH TOTAL
ACCUMULATIONS BY THE END OF THE STORM FROM 2 TO 6 INCHES FROM
ATLANTIC...DES MOINES AND GRINNELL...UP TO OVER A FOOT ALONG AND
WEST OF A DENISON...TO FORT DODGE...TO MASON CITY LINE.
* WINDS...BRISK EAST WINDS OF 15 TO 25 MPH WILL BE IN PLACE
THROUGH MUCH OF WEDNESDAY AND THURSDAY BEFORE INCREASING EVEN
FURTHER BY FRIDAY AND TURNING AROUND TO NORTH AND NORTHWEST.
WINDS BY THAT TIME MAY BE SUSTAINED AT 25 TO 35 MPH WITH GUSTS
EVEN HIGHER.
* VISIBILITY...DURING THE PERIODS OF HEAVY SNOW THURSDAY INTO
FRIDAY...VISIBILITIES WILL GENERALLY BE LESS THAN ONE MILE AND
EVEN DOWN TO A QUARTER MILE DURING THE HEAVIEST SNOWS. WITH
INCREASING WINDS AND SNOW COINCIDENT BY FRIDAY...BLOWING SNOW
AND GREATLY REDUCED VISIBILITIES NEAR BLIZZARD CONDITIONS WILL
BE POSSIBLE BY THAT TIME.
* IMPACTS...TRAVEL WILL BECOME INCREASINGLY DIFFICULT IN THE
WATCH AREA ON WEDNESDAY DURING THE WINTRY MIX OF PRECIPITATION
AND CONTINUE TO BE DIFFICULT INTO THURSDAY AND FRIDAY AS SNOW
ACCUMULATES AND WINDS INCREASE. IN THE HEAVIEST SNOW AREAS...
TRAVEL MAY BECOME NEARLY IMPOSSIBLE DUE TO BLOWING AND
DRIFTING SNOW THURSDAY NIGHT INTO FRIDAY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT
SNOW...SLEET...OR ICE ACCUMULATIONS THAT MAY IMPACT TRAVEL.
CONTINUE TO MONITOR THE LATEST FORECASTS.
A FREEZING RAIN ADVISORY MEANS THAT PERIODS OF FREEZING RAIN OR
FREEZING DRIZZLE WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR
SLIPPERY ROADS. SLOW DOWN AND USE CAUTION WHILE DRIVING.
$$
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