Alert archive / Iowa / Snow Advisories in 2008
Snow Advisory 2, NWS Des Moines, IA
NWS Des Moines, IA issued this snow advisory at Jan 16, 2008, 10:50 AM CST for 47 counties in Iowa. It took effect at Jan 16, 2008, 4:00 PM CST. It was in force for 21 hr.
The area
The counties it named.
The facts
- Issued
- Jan 16, 2008, 10:50 AM CST (16:50 UTC)
- In effect from
- Jan 16, 2008, 4:00 PM CST
- Expired
- Jan 17, 2008, 1:14 PM CST
- In force
- 21 hr
- Issued by
- NWS Des Moines, IA
All 47 counties
Adair County, IA, Adams County, IA, Appanoose County, IA, Audubon County, IA, Black Hawk County, IA, Boone County, IA, Bremer County, IA, Butler County, IA, Calhoun County, IA, Carroll County, IA, Cass County, IA, Cerro Gordo County, IA, Clarke County, IA, Crawford County, IA, Dallas County, IA, Davis County, IA, Decatur County, IA, Franklin County, IA, Greene County, IA, Grundy County, IA, Guthrie County, IA, Hamilton County, IA, Hancock County, IA, Hardin County, IA, Humboldt County, IA, Jasper County, IA, Lucas County, IA, Madison County, IA, Mahaska County, IA, Marion County, IA, Marshall County, IA, Monroe County, IA, Polk County, IA, Poweshiek County, IA, Ringgold County, IA, Sac County, IA, Story County, IA, Tama County, IA, Taylor County, IA, Union County, IA, Wapello County, IA, Warren County, IA, Wayne County, IA, Webster County, IA, Winnebago County, IA, Worth County, IA, Wright County, IA
The radar
The Des Moines radar (KDMX), 13 km from the middle of the area, began a volume at 16:51 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 4.8 hours before the alert went out and 233 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 688 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- -183 m²/s²
- 0-3 km storm-relative helicity
- 82 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WWUS43 KDMX 161650 WSWDMX URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DES MOINES IA 1050 AM CST WED JAN 16 2008 ...SIGNIFICANT SNOWFALL HEADING FOR IOWA LATE THIS AFTERNOON THROUGH THURSDAY AFTERNOON... .LOW PRESSURE WILL MOVE NORTH FROM THE SOUTHERN PLAINS TODAY AND TONIGHT...AND THEN TRACK NEAR THE IOWA...ILLINOIS BORDER THURSDAY. THIS SYSTEM WILL PRODUCE MODERATE TO HEAVY SNOWFALL ESPECIALLY OVERNIGHT INTO THURSDAY MORNING ACROSS PORTIONS OF CENTRAL IOWA. IAZ007-016-017-024>026-035>037-046>048-057>059-070>072-081-082- 092-093-170100- /O.UPG.KDMX.WS.A.0001.080116T2200Z-080117T2100Z/ /O.NEW.KDMX.SN.Y.0002.080116T2200Z-080117T1800Z/ WORTH-HANCOCK-CERRO GORDO-HUMBOLDT-WRIGHT-FRANKLIN-WEBSTER- HAMILTON-HARDIN-GREENE-BOONE-STORY-AUDUBON-GUTHRIE-DALLAS-CASS- ADAIR-MADISON-ADAMS-UNION-TAYLOR-RINGGOLD- INCLUDING THE CITIES OF...NORTHWOOD...GARNER...MASON CITY... HUMBOLDT...CLARION...HAMPTON...FORT DODGE...WEBSTER CITY... ELDORA...JEFFERSON...BOONE...AMES...AUDUBON...GUTHRIE CENTER... ADEL...ATLANTIC...GREENFIELD...WINTERSET...CORNING...CRESTON... BEDFORD...MOUNT AYR 1050 AM CST WED JAN 16 2008 ...SNOW ADVISORY IN EFFECT FROM 4 PM THIS AFTERNOON TO 12 PM CST THURSDAY... THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A SNOW ADVISORY...WHICH IS IN EFFECT FROM 4 PM THIS AFTERNOON TO 12 PM CST THURSDAY. THE WINTER STORM WATCH IS NO LONGER IN EFFECT. LOW PRESSURE MOVING NORTHEAST OUT OF THE SOUTHERN PLAINS WILL SPREAD SNOW ACROSS THE AREA BEGINNING THIS AFTERNOON AND CONTINUING THROUGH THURSDAY MORNING. THE HEAVIEST SNOW IS EXPECTED TO OCCUR LATER THIS EVENING...THROUGH EARLY THURSDAY MORNING. THE SNOW WILL GRADUALLY DIMINISH THURSDAY MORNING. SNOWFALL IS EXPECTED TO BE IN THE 2 TO 5 INCH RANGE WITH THE HEAVIER AMOUNTS ALONG AND EAST OF AN ATLANTIC TO FORT DODGE TO MASON CITY LINE. A NORTH WIND AT 10 TO 20 MPH WITH HIGHER GUSTS WILL CAUSE SOME BLOWING AND DRIFTING SNOW IN OPEN AREAS...MAINLY OVERNIGHT TONIGHT INTO EARLY THURSDAY MORNING. A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. $$ IAZ027-028-038-039-049-050-060>062-073>075-083>086-094>097-170100- /O.UPG.KDMX.WS.A.0001.080116T2200Z-080117T2100Z/ /O.NEW.KDMX.SN.Y.0002.080117T0000Z-080117T2100Z/ BUTLER-BREMER-GRUNDY-BLACK HAWK-MARSHALL-TAMA-POLK-JASPER- POWESHIEK-WARREN-MARION-MAHASKA-CLARKE-LUCAS-MONROE-WAPELLO- DECATUR-WAYNE-APPANOOSE-DAVIS- INCLUDING THE CITIES OF...ALLISON...WAVERLY...GRUNDY CENTER... WATERLOO...MARSHALLTOWN...TOLEDO...DES MOINES...NEWTON... GRINNELL...INDIANOLA...KNOXVILLE...OSKALOOSA...OSCEOLA... CHARITON...ALBIA...OTTUMWA...LEON...CORYDON...CENTERVILLE... BLOOMFIELD 1050 AM CST WED JAN 16 2008 ...SNOW ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO 3 PM CST THURSDAY... THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A SNOW ADVISORY...WHICH IS IN EFFECT FROM 6 PM THIS EVENING TO 3 PM CST THURSDAY. THE WINTER STORM WATCH IS NO LONGER IN EFFECT. LOW PRESSURE MOVING NORTHEAST OUT OF THE SOUTHERN PLAINS WILL SPREAD SNOW ACROSS THE AREA BEGINNING LATE THIS AFTERNOON AND CONTINUING THROUGH THURSDAY AFTERNOON. THE HEAVIEST SNOW IS EXPECTED TO OCCUR AFTER MIDNIGHT TONIGHT...THROUGH MID MORNING THURSDAY. THE SNOW WILL GRADUALLY DIMINISH DURING THE LATE MORNING TO EARLY AFTERNOON HOURS THURSDAY. SNOWFALL IS EXPECTED TO BE IN THE 4 TO 6 INCH RANGE...WITH HEAVIER TOTALS LIKELY TO BE ALONG AND EAST OF A LAMONI...TO DES MOINES...TO THE WATERLOO LINE. A NORTH WIND AT 10 TO 20 MPH WITH HIGHER GUSTS WILL CAUSE SOME BLOWING AND DRIFTING SNOW IN OPEN AREAS...MAINLY OVERNIGHT TONIGHT THROUGH NOON THURSDAY. A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. $$ IAZ034-044-045-170100- /O.NEW.KDMX.SN.Y.0002.080116T2200Z-080117T1800Z/ CALHOUN-CRAWFORD-CARROLL- INCLUDING THE CITIES OF...ROCKWELL CITY...DENISON...CARROLL 1050 AM CST WED JAN 16 2008 ...SNOW ADVISORY IN EFFECT FROM 4 PM THIS AFTERNOON TO 12 PM CST THURSDAY... THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A SNOW ADVISORY...WHICH IS IN EFFECT FROM 4 PM THIS AFTERNOON TO 12 PM CST THURSDAY. LOW PRESSURE MOVING NORTHEAST OUT OF THE SOUTHERN PLAINS WILL SPREAD SNOW ACROSS THE AREA BEGINNING THIS AFTERNOON AND CONTINUING THROUGH THURSDAY MORNING. THE HEAVIEST SNOW IS EXPECTED TO OCCUR LATER THIS EVENING...THROUGH EARLY THURSDAY MORNING. THE SNOW WILL GRADUALLY DIMINISH THURSDAY MORNING. SNOWFALL IS EXPECTED TO BE IN THE 2 TO 5 INCH RANGE WITH THE HEAVIER AMOUNTS ALONG AND EAST OF AN ATLANTIC TO FT DODGE TO MASON CITY LINE. A NORTH WIND AT 10 TO 20 MPH WITH HIGHER GUSTS WILL CAUSE SOME BLOWING AND DRIFTING SNOW IN OPEN AREAS...MAINLY OVERNIGHT TONIGHT INTO EARLY THURSDAY MORNING. A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. $$ REV
7 follow-up statements
000 WWUS43 KDMX 162134 WSWDMX URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DES MOINES IA 334 PM CST WED JAN 16 2008 ...SIGNIFICANT SNOWFALL HEADING FOR IOWA LATE THIS AFTERNOON THROUGH THURSDAY AFTERNOON... .LOW PRESSURE WILL MOVE NORTH FROM THE SOUTHERN PLAINS TODAY AND TONIGHT...AND THEN TRACK NEAR THE IOWA...ILLINOIS BORDER THURSDAY. THIS SYSTEM WILL PRODUCE MODERATE TO HEAVY SNOWFALL ESPECIALLY OVERNIGHT INTO THURSDAY MORNING ACROSS PORTIONS OF CENTRAL IOWA. IAZ007-016-017-024>026-034>037-044>048-057>059-070>072-081-082- 092-093-170545- /O.CON.KDMX.SN.Y.0002.080116T2200Z-080117T1800Z/ WORTH-HANCOCK-CERRO GORDO-HUMBOLDT-WRIGHT-FRANKLIN-CALHOUN- WEBSTER-HAMILTON-HARDIN-CRAWFORD-CARROLL-GREENE-BOONE-STORY- AUDUBON-GUTHRIE-DALLAS-CASS-ADAIR-MADISON-ADAMS-UNION-TAYLOR- RINGGOLD- INCLUDING THE CITIES OF...NORTHWOOD...GARNER...MASON CITY... HUMBOLDT...CLARION...HAMPTON...ROCKWELL CITY...FORT DODGE... WEBSTER CITY...ELDORA...DENISON...CARROLL...JEFFERSON...BOONE... AMES...AUDUBON...GUTHRIE CENTER...ADEL...ATLANTIC...GREENFIELD... WINTERSET...CORNING...CRESTON...BEDFORD...MOUNT AYR 334 PM CST WED JAN 16 2008 ...SNOW ADVISORY REMAINS IN EFFECT UNTIL 12 PM CST THURSDAY... A SNOW ADVISORY REMAINS IN EFFECT UNTIL 12 PM CST THURSDAY. LOW PRESSURE MOVING NORTHEAST OUT OF THE SOUTHERN PLAINS WILL SPREAD SNOW ACROSS THE AREA BEGINNING THIS AFTERNOON AND CONTINUING THROUGH THURSDAY MORNING. THE HEAVIEST SNOW IS EXPECTED TO OCCUR LATER THIS EVENING...THROUGH EARLY THURSDAY MORNING. THE SNOW WILL GRADUALLY DIMINISH THURSDAY MORNING. SNOWFALL IS EXPECTED TO BE IN THE 2 TO 5 INCH RANGE WITH THE HEAVIER AMOUNTS ALONG AND EAST OF AN ATLANTIC TO FORT DODGE TO MASON CITY LINE. A NORTH WIND AT 10 TO 20 MPH WITH HIGHER GUSTS WILL CAUSE SOME BLOWING AND DRIFTING SNOW IN OPEN AREAS...MAINLY OVERNIGHT TONIGHT INTO EARLY THURSDAY MORNING. A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. $$ IAZ027-028-038-039-049-050-060>062-073>075-083>086-094>097-170545- /O.CON.KDMX.SN.Y.0002.080117T0000Z-080117T2100Z/ BUTLER-BREMER-GRUNDY-BLACK HAWK-MARSHALL-TAMA-POLK-JASPER- POWESHIEK-WARREN-MARION-MAHASKA-CLARKE-LUCAS-MONROE-WAPELLO- DECATUR-WAYNE-APPANOOSE-DAVIS- INCLUDING THE CITIES OF...ALLISON...WAVERLY...GRUNDY CENTER... WATERLOO...MARSHALLTOWN...TOLEDO...DES MOINES...NEWTON... GRINNELL...INDIANOLA...KNOXVILLE...OSKALOOSA...OSCEOLA... CHARITON...ALBIA...OTTUMWA...LEON...CORYDON...CENTERVILLE... BLOOMFIELD 334 PM CST WED JAN 16 2008 ...SNOW ADVISORY REMAINS IN EFFECT UNTIL 3 PM CST THURSDAY... A SNOW ADVISORY REMAINS IN EFFECT UNTIL 3 PM CST THURSDAY. LOW PRESSURE MOVING NORTHEAST OUT OF THE SOUTHERN PLAINS WILL SPREAD SNOW ACROSS THE AREA BEGINNING LATE THIS AFTERNOON AND CONTINUING THROUGH THURSDAY AFTERNOON. THE HEAVIEST SNOW IS EXPECTED TO OCCUR AFTER MIDNIGHT TONIGHT...THROUGH MID MORNING THURSDAY. THE SNOW WILL GRADUALLY DIMINISH DURING THE LATE MORNING TO EARLY AFTERNOON HOURS THURSDAY. SNOWFALL IS EXPECTED TO BE IN THE 4 TO 6 INCH RANGE...WITH HEAVIER TOTALS LIKELY TO BE ALONG AND EAST OF A LAMONI...TO DES MOINES...TO THE WATERLOO LINE. A NORTH WIND AT 10 TO 20 MPH WITH HIGHER GUSTS WILL CAUSE SOME BLOWING AND DRIFTING SNOW IN OPEN AREAS...MAINLY OVERNIGHT TONIGHT THROUGH NOON THURSDAY. A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. $$ REV
000 WWUS43 KDMX 170305 WSWDMX URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DES MOINES IA 905 PM CST WED JAN 16 2008 ...SIGNIFICANT SNOWFALL TO IMPACT MUCH OF CENTRAL IOWA THROUGH THURSDAY MORNING... .LOW PRESSURE WILL MOVE NORTH FROM THE SOUTHERN PLAINS TONIGHT...AND THEN TRACK NEAR THE IOWA...ILLINOIS BORDER THURSDAY. THIS SYSTEM WILL PRODUCE GENERALLY LIGHT TO MODERATE SNOWFALL...BUT COULD BE LOCALLY HEAVY AT TIMES LATE TONIGHT AND THURSDAY MORNING. IAZ007-016-017-024>026-034>037-044>048-057>059-070>072-081-082- 092-093-171115- /O.CON.KDMX.SN.Y.0002.000000T0000Z-080117T1800Z/ WORTH-HANCOCK-CERRO GORDO-HUMBOLDT-WRIGHT-FRANKLIN-CALHOUN- WEBSTER-HAMILTON-HARDIN-CRAWFORD-CARROLL-GREENE-BOONE-STORY- AUDUBON-GUTHRIE-DALLAS-CASS-ADAIR-MADISON-ADAMS-UNION-TAYLOR- RINGGOLD- INCLUDING THE CITIES OF...NORTHWOOD...GARNER...MASON CITY... HUMBOLDT...CLARION...HAMPTON...ROCKWELL CITY...FORT DODGE... WEBSTER CITY...ELDORA...DENISON...CARROLL...JEFFERSON...BOONE... AMES...AUDUBON...GUTHRIE CENTER...ADEL...ATLANTIC...GREENFIELD... WINTERSET...CORNING...CRESTON...BEDFORD...MOUNT AYR 905 PM CST WED JAN 16 2008 ...SNOW ADVISORY REMAINS IN EFFECT UNTIL 12 PM CST THURSDAY... A SNOW ADVISORY REMAINS IN EFFECT UNTIL 12 PM CST THURSDAY. LIGHT TO MODERATE SNOW WILL CONTINUE OVERNIGHT...THEN END FROM THE SOUTHWEST THURSDAY MORNING. THE HEAVIEST SNOW IS EXPECTED TO OCCUR BETWEEN MIDNIGHT AND 6 AM THURSDAY...WHEN SNOWFALL RATES COULD BE AS MUCH AS ONE HALF INCH PER HOUR. TOTAL SNOWFALL BY MIDDAY THURSDAY IS EXPECTED TO BE 2 TO 5 INCHES...WITH THE HEAVIEST AMOUNTS ALONG AND EAST OF AN ATLANTIC TO FORT DODGE TO MASON CITY LINE. A NORTH WIND AT 10 TO 20 MPH WITH HIGHER GUSTS WILL CAUSE SOME BLOWING AND DRIFTING SNOW IN OPEN AREAS...MAINLY OVERNIGHT TONIGHT INTO EARLY THURSDAY MORNING. A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITY...AND USE CAUTION WHILE DRIVING. $$ IAZ027-028-038-039-049-050-060>062-073>075-083>086-094>097-171115- /O.CON.KDMX.SN.Y.0002.000000T0000Z-080117T2100Z/ BUTLER-BREMER-GRUNDY-BLACK HAWK-MARSHALL-TAMA-POLK-JASPER- POWESHIEK-WARREN-MARION-MAHASKA-CLARKE-LUCAS-MONROE-WAPELLO- DECATUR-WAYNE-APPANOOSE-DAVIS- INCLUDING THE CITIES OF...ALLISON...WAVERLY...GRUNDY CENTER... WATERLOO...MARSHALLTOWN...TOLEDO...DES MOINES...NEWTON... GRINNELL...INDIANOLA...KNOXVILLE...OSKALOOSA...OSCEOLA... CHARITON...ALBIA...OTTUMWA...LEON...CORYDON...CENTERVILLE... BLOOMFIELD 905 PM CST WED JAN 16 2008 ...SNOW ADVISORY REMAINS IN EFFECT UNTIL 3 PM CST THURSDAY... A SNOW ADVISORY REMAINS IN EFFECT UNTIL 3 PM CST THURSDAY. LIGHT TO MODERATE SNOW WILL CONTINUE OVERNIGHT...THEN END FROM THE SOUTHWEST THURSDAY MORNING. THE HEAVIEST SNOW IS EXPECTED TO OCCUR BETWEEN MIDNIGHT AND 6 AM THURSDAY ACROSS SOUTH CENTRAL IOWA...AND BETWEEN 3 AM AND 9 AM THURSDAY NORTHEAST OF DES MOINES TOWARD WATERLOO. DURING THESE TIMES SNOWFALL RATES COULD BE AS MUCH AS ONE HALF TO THREE QUARTERS OF AN INCH PER HOUR. TOTAL SNOWFALL BY EARLY THURSDAY AFTERNOON IS EXPECTED TO BE 4 TO 6 INCHES...WITH HEAVIEST TOTALS LIKELY TO BE ALONG AND EAST OF A LAMONI...TO DES MOINES...AND WATERLOO LINE. A NORTH WIND AT 10 TO 20 MPH WITH HIGHER GUSTS WILL CAUSE SOME BLOWING AND DRIFTING SNOW IN OPEN AREAS...MAINLY OVERNIGHT TONIGHT THROUGH NOON THURSDAY. A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITY...AND USE CAUTION WHILE DRIVING. $$ MOYER
000 WWUS43 KDMX 170938 WSWDMX URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DES MOINES IA 338 AM CST THU JAN 17 2008 ...SIGNIFICANT SNOWFALL WILL CONTINUE THROUGH THIS MORNING... .LOW PRESSURE WILL MOVE TRACK NEAR THE IOWA...ILLINOIS BORDER THIS MORNING THEN LIFT NORTHEAST INTO THE GREAT LAKES REGION THIS AFTERNOON. THIS SYSTEM WILL PRODUCE MAINLY LIGHT TO MODERATE SNOWFALL...BUT COULD BE LOCALLY HEAVY AT TIMES THIS MORNING. IAZ033-171745- /O.EXA.KDMX.SN.Y.0002.000000T0000Z-080117T1800Z/ SAC- INCLUDING THE CITY OF...SAC CITY 338 AM CST THU JAN 17 2008 ...SNOW ADVISORY IN EFFECT UNTIL NOON CST TODAY... THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A SNOW ADVISORY...WHICH IS IN EFFECT UNTIL NOON CST TODAY. LIGHT TO MODERATE SNOW WILL CONTINUE THROUGH LATE MORNING BEFORE TAPERING OFF. TOTAL SNOWFALL AMOUNTS OF 3 TO 4 INCHES ARE EXPECTED. A NORTH WIND AT 10 TO 20 MPH WITH HIGHER GUSTS WILL CAUSE SOME DRIFTING SNOW IN OPEN AREAS THIS MORNING. A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITY...AND USE CAUTION WHILE DRIVING. $$ IAZ006-171745- /O.EXA.KDMX.SN.Y.0002.000000T0000Z-080117T2100Z/ WINNEBAGO- INCLUDING THE CITY OF...FOREST CITY 338 AM CST THU JAN 17 2008 ...SNOW ADVISORY IN EFFECT UNTIL 3 PM CST THIS AFTERNOON... THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A SNOW ADVISORY...WHICH IS IN EFFECT UNTIL 3 PM CST THIS AFTERNOON. LIGHT TO MODERATE SNOW WILL CONTINUE THROUGH EARLY AFTERNOON BEFORE TAPERING OFF. TOTAL SNOWFALL AMOUNTS OF 3 TO 4 INCHES ARE EXPECTED. A NORTH WIND AT 10 TO 20 MPH WITH HIGHER GUSTS WILL CAUSE SOME DRIFTING SNOW IN OPEN AREAS THIS MORNING. A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITY...AND USE CAUTION WHILE DRIVING. $$ IAZ038-039-049-050-060>062-073>075-083>086-094>097-171745- /O.EXT.KDMX.SN.Y.0002.000000T0000Z-080117T1800Z/ GRUNDY-BLACK HAWK-MARSHALL-TAMA-POLK-JASPER-POWESHIEK-WARREN- MARION-MAHASKA-CLARKE-LUCAS-MONROE-WAPELLO-DECATUR-WAYNE- APPANOOSE-DAVIS- INCLUDING THE CITIES OF...GRUNDY CENTER...WATERLOO... MARSHALLTOWN...TOLEDO...DES MOINES...NEWTON...GRINNELL... INDIANOLA...KNOXVILLE...OSKALOOSA...OSCEOLA...CHARITON...ALBIA... OTTUMWA...LEON...CORYDON...CENTERVILLE...BLOOMFIELD 338 AM CST THU JAN 17 2008 ...SNOW ADVISORY NOW IN EFFECT UNTIL NOON CST TODAY... THE SNOW ADVISORY IS NOW IN EFFECT UNTIL NOON CST TODAY. LIGHT TO MODERATE SNOW...AND BRIEFLY HEAVY AT TIMES...WILL CONTINUE THROUGH LATE MORNING BEFORE TAPERING OFF. TOTAL SNOWFALL AMOUNTS OF 3 TO 6 INCHES ARE EXPECTED...WITH THE HIGHER TOTALS ALONG THE INTERSTATE 35 CORRIDOR. A NORTH WIND AT 10 TO 20 MPH WITH HIGHER GUSTS WILL CAUSE SOME DRIFTING SNOW IN OPEN AREAS THIS MORNING. A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITY...AND USE CAUTION WHILE DRIVING. $$ IAZ007-017-026-171745- /O.EXT.KDMX.SN.Y.0002.000000T0000Z-080117T2100Z/ WORTH-CERRO GORDO-FRANKLIN- INCLUDING THE CITIES OF...NORTHWOOD...MASON CITY...HAMPTON 338 AM CST THU JAN 17 2008 ...SNOW ADVISORY NOW IN EFFECT UNTIL 3 PM CST THIS AFTERNOON... THE SNOW ADVISORY IS NOW IN EFFECT UNTIL 3 PM CST THIS AFTERNOON. LIGHT TO MODERATE SNOW WILL CONTINUE THROUGH EARLY AFTERNOON BEFORE TAPERING OFF. TOTAL SNOWFALL AMOUNTS OF 3 TO 4 INCHES ARE EXPECTED. A NORTH WIND AT 10 TO 20 MPH WITH HIGHER GUSTS WILL CAUSE SOME DRIFTING SNOW IN OPEN AREAS THIS MORNING. A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITY...AND USE CAUTION WHILE DRIVING. $$ IAZ016-024-025-034>037-044>048-057>059-070>072-081-082-092-093- 171745- /O.CON.KDMX.SN.Y.0002.000000T0000Z-080117T1800Z/ HANCOCK-HUMBOLDT-WRIGHT-CALHOUN-WEBSTER-HAMILTON-HARDIN-CRAWFORD- CARROLL-GREENE-BOONE-STORY-AUDUBON-GUTHRIE-DALLAS-CASS-ADAIR- MADISON-ADAMS-UNION-TAYLOR-RINGGOLD- INCLUDING THE CITIES OF...GARNER...HUMBOLDT...CLARION... ROCKWELL CITY...FORT DODGE...WEBSTER CITY...ELDORA...DENISON... CARROLL...JEFFERSON...BOONE...AMES...AUDUBON...GUTHRIE CENTER... ADEL...ATLANTIC...GREENFIELD...WINTERSET...CORNING...CRESTON... BEDFORD...MOUNT AYR 338 AM CST THU JAN 17 2008 ...SNOW ADVISORY REMAINS IN EFFECT UNTIL NOON CST TODAY... A SNOW ADVISORY REMAINS IN EFFECT UNTIL NOON CST TODAY. LIGHT TO MODERATE SNOW...AND BRIEFLY HEAVY AT TIMES...WILL CONTINUE THROUGH LATE MORNING BEFORE TAPERING OFF. TOTAL SNOWFALL AMOUNTS OF 3 TO 7 INCHES ARE EXPECTED...WITH THE HIGHER TOTALS WEST OF INTERSTATE 35 IN SOUTHERN IOWA. A NORTH WIND AT 10 TO 20 MPH WITH HIGHER GUSTS WILL CAUSE SOME DRIFTING SNOW IN OPEN AREAS THIS MORNING. A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITY...AND USE CAUTION WHILE DRIVING. $$ IAZ027-028-171745- /O.CON.KDMX.SN.Y.0002.000000T0000Z-080117T2100Z/ BUTLER-BREMER- INCLUDING THE CITIES OF...ALLISON...WAVERLY 338 AM CST THU JAN 17 2008 ...SNOW ADVISORY REMAINS IN EFFECT UNTIL 3 PM CST THIS AFTERNOON... A SNOW ADVISORY REMAINS IN EFFECT UNTIL 3 PM CST THIS AFTERNOON. LIGHT TO MODERATE SNOW WILL CONTINUE THROUGH EARLY AFTERNOON BEFORE TAPERING OFF. TOTAL SNOWFALL AMOUNTS AROUND 4 INCHES ARE EXPECTED. A NORTH WIND AT 10 TO 20 MPH WITH HIGHER GUSTS WILL CAUSE SOME DRIFTING SNOW IN OPEN AREAS THIS MORNING. A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITY...AND USE CAUTION WHILE DRIVING. $$ KINNEY
000 WWUS43 KDMX 171006 WSWDMX URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DES MOINES IA 406 AM CST THU JAN 17 2008 ...SIGNIFICANT SNOWFALL WILL CONTINUE THROUGH THIS MORNING... .LOW PRESSURE WILL MOVE TRACK NEAR THE IOWA...ILLINOIS BORDER THIS MORNING THEN LIFT NORTHEAST INTO THE GREAT LAKES REGION THIS AFTERNOON. THIS SYSTEM WILL PRODUCE MAINLY LIGHT TO MODERATE SNOWFALL...BUT COULD BE LOCALLY HEAVY AT TIMES THIS MORNING. IAZ016-024-025-033>039-044>050-057>062-070>075-081>086-092>097- 171800- /O.CON.KDMX.SN.Y.0002.000000T0000Z-080117T1800Z/ HANCOCK-HUMBOLDT-WRIGHT-SAC-CALHOUN-WEBSTER-HAMILTON-HARDIN- GRUNDY-BLACK HAWK-CRAWFORD-CARROLL-GREENE-BOONE-STORY-MARSHALL- TAMA-AUDUBON-GUTHRIE-DALLAS-POLK-JASPER-POWESHIEK-CASS-ADAIR- MADISON-WARREN-MARION-MAHASKA-ADAMS-UNION-CLARKE-LUCAS-MONROE- WAPELLO-TAYLOR-RINGGOLD-DECATUR-WAYNE-APPANOOSE-DAVIS- INCLUDING THE CITIES OF...GARNER...HUMBOLDT...CLARION... SAC CITY...ROCKWELL CITY...FORT DODGE...WEBSTER CITY...ELDORA... GRUNDY CENTER...WATERLOO...DENISON...CARROLL...JEFFERSON... BOONE...AMES...MARSHALLTOWN...TOLEDO...AUDUBON...GUTHRIE CENTER... ADEL...DES MOINES...NEWTON...GRINNELL...ATLANTIC...GREENFIELD... WINTERSET...INDIANOLA...KNOXVILLE...OSKALOOSA...CORNING... CRESTON...OSCEOLA...CHARITON...ALBIA...OTTUMWA...BEDFORD... MOUNT AYR...LEON...CORYDON...CENTERVILLE...BLOOMFIELD 406 AM CST THU JAN 17 2008 ...SNOW ADVISORY REMAINS IN EFFECT UNTIL NOON CST TODAY... A SNOW ADVISORY REMAINS IN EFFECT UNTIL NOON CST TODAY. LIGHT TO MODERATE SNOW...AND BRIEFLY HEAVY AT TIMES...WILL CONTINUE THROUGH LATE MORNING BEFORE TAPERING OFF. TOTAL SNOWFALL AMOUNTS OF 3 TO 7 INCHES ARE EXPECTED...WITH THE HIGHER TOTALS WEST OF INTERSTATE 35 IN SOUTHERN IOWA. A NORTH WIND AT 10 TO 20 MPH WITH HIGHER GUSTS WILL CAUSE SOME DRIFTING SNOW IN OPEN AREAS THIS MORNING. A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITY...AND USE CAUTION WHILE DRIVING. $$ IAZ006-007-017-026>028-171815- /O.CON.KDMX.SN.Y.0002.000000T0000Z-080117T2100Z/ WINNEBAGO-WORTH-CERRO GORDO-FRANKLIN-BUTLER-BREMER- INCLUDING THE CITIES OF...FOREST CITY...NORTHWOOD...MASON CITY... HAMPTON...ALLISON...WAVERLY 406 AM CST THU JAN 17 2008 ...SNOW ADVISORY REMAINS IN EFFECT UNTIL 3 PM CST THIS AFTERNOON... A SNOW ADVISORY REMAINS IN EFFECT UNTIL 3 PM CST THIS AFTERNOON. LIGHT TO MODERATE SNOW WILL CONTINUE THROUGH EARLY AFTERNOON BEFORE TAPERING OFF. TOTAL SNOWFALL AMOUNTS OF 3 TO 4 INCHES ARE EXPECTED. A NORTH WIND AT 10 TO 20 MPH WITH HIGHER GUSTS WILL CAUSE SOME DRIFTING SNOW IN OPEN AREAS THIS MORNING. A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITY...AND USE CAUTION WHILE DRIVING. $$ KINNEY
000 WWUS43 KDMX 171333 WSWDMX URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DES MOINES IA 733 AM CST THU JAN 17 2008 ...SNOWFALL WINDING DOWN ACROSS SOUTHERN IOWA... .LOW PRESSURE WILL MOVE TRACK NEAR THE IOWA...ILLINOIS BORDER THIS MORNING THEN LIFT NORTHEAST INTO THE GREAT LAKES REGION THIS AFTERNOON. THIS SYSTEM WILL PRODUCE ADDITIONAL LIGHT TO MODERATE SNOWFALL THIS MORNING...BEFORE TAPERING OFF FROM CENTRAL INTO NORTHERN IOWA. IAZ070>073-081>086-092>097-171445- /O.CAN.KDMX.SN.Y.0002.000000T0000Z-080117T1800Z/ CASS-ADAIR-MADISON-WARREN-ADAMS-UNION-CLARKE-LUCAS-MONROE-WAPELLO- TAYLOR-RINGGOLD-DECATUR-WAYNE-APPANOOSE-DAVIS- INCLUDING THE CITIES OF...ATLANTIC...GREENFIELD...WINTERSET... INDIANOLA...CORNING...CRESTON...OSCEOLA...CHARITON...ALBIA... OTTUMWA...BEDFORD...MOUNT AYR...LEON...CORYDON...CENTERVILLE... BLOOMFIELD 733 AM CST THU JAN 17 2008 ...SNOW ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN DES MOINES HAS CANCELLED THE SNOW ADVISORY. SNOWFALL HAS DIMINISHED SOUTH OF INTERSTATE 80 THIS MORNING WITH LITTLE OR NO ADDITIONAL ACCUMULATION EXPECTED. $$ IAZ016-024-025-033>039-044>050-057>062-074-075-171800- /O.CON.KDMX.SN.Y.0002.000000T0000Z-080117T1800Z/ HANCOCK-HUMBOLDT-WRIGHT-SAC-CALHOUN-WEBSTER-HAMILTON-HARDIN- GRUNDY-BLACK HAWK-CRAWFORD-CARROLL-GREENE-BOONE-STORY-MARSHALL- TAMA-AUDUBON-GUTHRIE-DALLAS-POLK-JASPER-POWESHIEK-MARION-MAHASKA- INCLUDING THE CITIES OF...GARNER...HUMBOLDT...CLARION... SAC CITY...ROCKWELL CITY...FORT DODGE...WEBSTER CITY...ELDORA... GRUNDY CENTER...WATERLOO...DENISON...CARROLL...JEFFERSON... BOONE...AMES...MARSHALLTOWN...TOLEDO...AUDUBON...GUTHRIE CENTER... ADEL...DES MOINES...NEWTON...GRINNELL...KNOXVILLE...OSKALOOSA 733 AM CST THU JAN 17 2008 ...SNOW ADVISORY REMAINS IN EFFECT UNTIL NOON CST TODAY... A SNOW ADVISORY REMAINS IN EFFECT UNTIL NOON CST TODAY. LIGHT TO MODERATE SNOW WILL CONTINUE THROUGH LATE MORNING BEFORE TAPERING OFF. TOTAL SNOWFALL AMOUNTS OF 3 TO 7 INCHES ARE EXPECTED...WITH THE HIGHER TOTALS ALONG AND WEST OF INTERSTATE 35 IN SOUTHERN IOWA. A NORTH WIND AT 10 TO 20 MPH WITH HIGHER GUSTS WILL CAUSE SOME DRIFTING SNOW IN OPEN AREAS THIS MORNING. A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITY...AND USE CAUTION WHILE DRIVING. $$ IAZ006-007-017-026>028-172100- /O.CON.KDMX.SN.Y.0002.000000T0000Z-080117T2100Z/ WINNEBAGO-WORTH-CERRO GORDO-FRANKLIN-BUTLER-BREMER- INCLUDING THE CITIES OF...FOREST CITY...NORTHWOOD...MASON CITY... HAMPTON...ALLISON...WAVERLY 733 AM CST THU JAN 17 2008 ...SNOW ADVISORY REMAINS IN EFFECT UNTIL 3 PM CST THIS AFTERNOON... A SNOW ADVISORY REMAINS IN EFFECT UNTIL 3 PM CST THIS AFTERNOON. LIGHT TO MODERATE SNOW WILL CONTINUE THROUGH EARLY AFTERNOON BEFORE TAPERING OFF. TOTAL SNOWFALL AMOUNTS OF 2 TO 4 INCHES ARE EXPECTED. A NORTH WIND AT 10 TO 20 MPH WITH HIGHER GUSTS WILL CAUSE SOME DRIFTING SNOW IN OPEN AREAS THIS MORNING. A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITY...AND USE CAUTION WHILE DRIVING. $$ KINNEY
000 WWUS43 KDMX 171600 WSWDMX URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DES MOINES IA 1000 AM CST THU JAN 17 2008 ...SNOWFALL WINDING DOWN ACROSS CENTRAL IOWA... .LOW PRESSURE WILL MOVE TRACK THROUGH SOUTHERN WISCONSIN AND INTO THE GREAT LAKES REGION BY THIS EVENING. SNOW COVERAGE IS FORECAST TO DECREASE FROM SOUTH TO NORTH ACROSS CENTRAL IOWA THROUGH EARLY AFTERNOON. IAZ016-024-025-033>039-044>050-057>062-074-075-171700- /O.CAN.KDMX.SN.Y.0002.000000T0000Z-080117T1800Z/ HANCOCK-HUMBOLDT-WRIGHT-SAC-CALHOUN-WEBSTER-HAMILTON-HARDIN- GRUNDY-BLACK HAWK-CRAWFORD-CARROLL-GREENE-BOONE-STORY-MARSHALL- TAMA-AUDUBON-GUTHRIE-DALLAS-POLK-JASPER-POWESHIEK-MARION-MAHASKA- INCLUDING THE CITIES OF...GARNER...HUMBOLDT...CLARION... SAC CITY...ROCKWELL CITY...FORT DODGE...WEBSTER CITY...ELDORA... GRUNDY CENTER...WATERLOO...DENISON...CARROLL...JEFFERSON... BOONE...AMES...MARSHALLTOWN...TOLEDO...AUDUBON...GUTHRIE CENTER... ADEL...DES MOINES...NEWTON...GRINNELL...KNOXVILLE...OSKALOOSA 1000 AM CST THU JAN 17 2008 ...SNOW ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN DES MOINES HAS CANCELLED THE SNOW ADVISORY. SOME LIGHT SNOW OR FLURRIES MAY OCCUR...HOWEVER NO ADDITIONAL ACCUMULATIONS ARE EXPECTED. $$ IAZ006-007-017-026>028-172100- /O.CON.KDMX.SN.Y.0002.000000T0000Z-080117T2100Z/ WINNEBAGO-WORTH-CERRO GORDO-FRANKLIN-BUTLER-BREMER- INCLUDING THE CITIES OF...FOREST CITY...NORTHWOOD...MASON CITY... HAMPTON...ALLISON...WAVERLY 1000 AM CST THU JAN 17 2008 ...SNOW ADVISORY REMAINS IN EFFECT UNTIL 3 PM CST THIS AFTERNOON... A SNOW ADVISORY REMAINS IN EFFECT UNTIL 3 PM CST THIS AFTERNOON. LIGHT TO MODERATE SNOW WILL CONTINUE THROUGH EARLY AFTERNOON BEFORE TAPERING OFF. ADDITIONAL SNOW OF 1 INCH IS EXPECTED WITH TOTAL SNOWFALL AMOUNTS OF 2 TO 4 INCHES. A NORTH WIND AT 10 TO 20 MPH WITH HIGHER GUSTS WILL CAUSE SOME DRIFTING SNOW IN OPEN AREAS THIS MORNING. A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITY...AND USE CAUTION WHILE DRIVING. $$ CC
000 WWUS43 KDMX 171914 WSWDMX URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DES MOINES IA 114 PM CST THU JAN 17 2008 ...STORM MOVING AWAY FROM IOWA TODAY... .A STORM THAT BROUGHT SNOW TO THE STATE WEDNESDAY THROUGH THIS MORNING IS MOVING EAST OF THE STATE. THE SNOWFALL ACROSS NORTHERN IOWA IS DIMINISHING AND LITTLE ADDITIONAL ACCUMULATION IS EXPECTED. IAZ006-007-017-026>028-172015- /O.CAN.KDMX.SN.Y.0002.000000T0000Z-080117T2100Z/ WINNEBAGO-WORTH-CERRO GORDO-FRANKLIN-BUTLER-BREMER- INCLUDING THE CITIES OF...FOREST CITY...NORTHWOOD...MASON CITY... HAMPTON...ALLISON...WAVERLY 114 PM CST THU JAN 17 2008 ...SNOW ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN DES MOINES HAS CANCELLED THE SNOW ADVISORY. LIGHT SNOW OR FLURRIES CAN BE EXPECTED THIS AFTERNOON WITH LITTLE IF ANY ADDITIONAL ACCUMULATION. MOTORISTS SHOULD STILL USE CAUTION WHEN TRAVELING ON AREA ROADS THIS AFTERNOON. $$ REV
What forecasters said that day
The local office's own words before this snow advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Des Moines, IA wrote its last area forecast discussion before this snow advisory went out at Jan 16, 6:55 AM CST, 3 hours 55 minutes earlier.
Area forecast discussion, Jan 16, 6:55 AM CST, 3 hours 55 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DES MOINES IA 655 AM CST WED JAN 16 2008 .UPDATED 16/12Z AVIATION DISCUSSION .DISCUSSION... TWO PERIODS OF CONCERN WITH FORECAST. FIRST BEING THE NEAR TERM POTENTIAL FOR MODERATE SNOWFALL AND THE SECOND BEING THE PASSING OF AN ARCTIC BOUNDARY ON FRIDAY. FOR TODAY COLD FRONT HAS ENTERED FAR NORTHWEST IOWA WHILE THE PRIMARY UPPER LEVEL SYSTEM IS LAGGING OVER WESTERN COLORADO. THE COLD FRONT WILL MOVE SLOWLY EAST OVER IOWA TODAY AND WILL PROVIDE A LARGE TEMPERATURE GRADIENT ACROSS THE STATE WITH FALLING TEMPERATURES OVER THE NORTHWEST AND UNSEASONABLY WARM TO THE SOUTHEAST. THE UPPER LEVEL SHORT WAVE WILL BEGIN TO EJECT OUT INTO THE PLAINS LATE THIS AFTERNOON AND THEN PASS THOUGH THE REGION OVERNIGHT TONIGHT. SOME SNOWFALL IS ANTICIPATED TO BEGIN BY THIS AFTERNOON WITH UP TO AN INCH POSSIBLE OVER THE SOUTHWEST. THE 12Z AND 18Z MODEL RUNS WERE PRETTY GENEROUS REGARDING PRECIPITATION AMOUNTS OVER ONE HALF INCH OVER MUCH OF CENTRAL IOWA. HOWEVER HAVING DIFFICULTY FINDING ENOUGH AVAILABLE MOISTURE TO FEED INTO THIS SYSTEM AS A STRONGER AREA OF LOW PRESSURE TRACKS ACROSS THE NORTHEN GULF OF MEXICO...EFFECTIVELY LIMITING THE MOISTURE SUPPLY TO THE MIDWEST. THE 00Z AND 06Z MODEL RUNS SEEM TO BE CATCHING ON TO THIS AND HAVE BEEN GRADUALLY SCALING BACK THE QPF AND FALLS MORE IN LINE WITH THE FAVORED EASTNMM4 WITH QPF IN THE .3 TO .4 TENTH OF AN INCH RANGE. THESE QPF AMOUNTS COMBINED WITH SNOWFALL RATIOS OF 11-13 TO 1 YIELDS A BAND OF 4 TO 6 INCHES. THE 00Z GFS AND NAM EACH FAVORED PEAK LIFT/OMEGA BELOW THE DEDRITIC ZONE...FAVORING SMALL PLATE GROWTH INSTEAD AND SUGGESTING LESSER SNOW AMOUNTS UNTIL THE PRIMARY SHORT WAVE PUSHES THROUGH THE AREA LATE TONIGHT. THE 06Z NAM NOW SUGGESTING A MORE PROLONGED PERIOD OF DENDRITES SO UNCERTAINTY STILL EXISTS. ANOTHER FACTOR IS THE POTENTIAL DRY SLOT AFFECTING A PORTION OF THE SOUTHEAST TONIGHT AS THE SHORT WAVE ARRIVES. OVERALL EXPECT A PROLONGED PERIOD OF LIGHT SNOW TONIGHT...BECOMING MODERATE AT TIMES THEN BEST CHANCE FOR WIDESPREAD MODERATE SNOW OCCURRING BETWEEN 06Z AND 12Z. WILL LEAVE THE WINTER STORM WATCH INTACT THOUGH DELAYED AN HOUR TO COINCIDE WITH NEW FORECAST PACKAGE. CURRENTLY EXPECT A HIGH END ADVISORY EVENT. WITH A PROLONGED SNOW EVENT...WARNING CRITERIA BECOMES 8 INCHES IF TIME PERIOD EXCEEDS 12 HOURS AND NOT CONFIDENT 6 INCHES WILL OCCUR IN ANY 12 HOUR PERIOD WITH EVENT. BY LEAVING AS A WATCH...WILL GIVE DAY SHIFT ANOTHER FEW MODELS RUNS TO LOOK AT AS WELL AS THE DEVELOPING SITUATION AND YET ALLOW FOR A LARGE LEAD TIME YET IF A WARNING WOULD NEED TO BE ISSUED. OVERALL THE LACK OF A MOISTURE SUPPLY MAY VERY WELL BE THIS EVENTS DOWNFALL BUT THE PROLONGED PERIOD OF SNOWFALL CAN NOT BE DISCOUNTED. THURSDAY THE SNOW WILL COME TO AN END FROM WEST TO EAST AND IT WILL BE COLD. WARMED LOWS FOR THURSDAY NIGHT AS WARM ADVECTION COMMENCES AHEAD OF THE APPROACHING POLAR BOUNDARY. ALSO WARMED HIGHS ON FRIDAY SOMEWHAT THOUGH THEY WONT BE AROUND LONG AS STRONG COLD ADVECTION SWEEPS ACROSS THE STATE IN THE MORNING RESULTING IN FALLING TEMPERATURES. LIGHT SNOW UP TO ONE INCH CAN ALSO BE EXPECTED. THE TWO CONCERNS WITH THIS SYSTEM LATE FRIDAY AND FRIDAY NIGHT WILL BE THE WIND CHILLS AND THEN BLOWING SNOW FROM NORTHWEST WINDS GUSTING TO 40 MPH. COULD VERY WELL EXCEED WIND CHILL WARNING CRITERIA OF -30F BELOW ZERO AND APPROACH BLIZZARD CONDITIONS WITH ALL OF THE NEW FLUFF ON THE GROUND. WILL HIGHLIGHT IN THE HWO. BITTERLY COLD ON SATURDAY WITH MANY LOCATIONS STAYING BELOW ZERO. && AVIATION...16/12Z MVFR CIGS WILL CONTINUE TO PUSH SOUTH ACROSS IOWA THIS MORNING AHEAD OF -SN EXPECTED TO BEGIN BY MID TO LATE AFTERNOON. KALO/KDSM STILL IN LINE TO GET HIGHER INTENSITY SNOW OVERNIGHT AND HAVE PERIODS OF 1/2SM VSBY AND MODERATE SNOW PRIOR TO 12Z. && .DMX WATCHES/WARNINGS/ADVISORIES... WINTER STORM WATCH FROM WEDNESDAY AFTERNOON THROUGH THURSDAY AFTERNOON FOR ADAIR-ADAMS-APPANOOSE-AUDUBON-BLACK HAWK-BOONE- BREMER-BUTLER-CASS-CERRO GORDO-CLARKE-DALLAS-DAVIS-DECATUR- FRANKLIN-GREENE-GRUNDY-GUTHRIE-HAMILTON-HANCOCK-HARDIN-HUMBOLDT- JASPER-LUCAS-MADISON-MAHASKA-MARION-MARSHALL-MONROE-POLK- POWESHIEK-RINGGOLD-STORY-TAMA-TAYLOR-UNION-WAPELLO-WARREN-WAYNE- WEBSTER-WORTH-WRIGHT. && SHORT TERM/AVIATION...KINNEY LONG TERM...DONAVON
Hazardous weather outlook, Jan 16, 5:13 AM CST, 5 hours 37 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DES MOINES IA 513 AM CST WED JAN 16 2008 IAZ007-016-017-024>028-035>039-046>050-057>062-070>075-081>086- 092>097-171115- WORTH-HANCOCK-CERRO GORDO-HUMBOLDT-WRIGHT-FRANKLIN-BUTLER-BREMER- WEBSTER-HAMILTON-HARDIN-GRUNDY-BLACK HAWK-GREENE-BOONE-STORY- MARSHALL-TAMA-AUDUBON-GUTHRIE-DALLAS-POLK-JASPER-POWESHIEK-CASS- ADAIR-MADISON-WARREN-MARION-MAHASKA-ADAMS-UNION-CLARKE-LUCAS- MONROE-WAPELLO-TAYLOR-RINGGOLD-DECATUR-WAYNE-APPANOOSE-DAVIS- 513 AM CST WED JAN 16 2008 THIS HAZARDOUS WEATHER OUTLOOK IS FOR MUCH OF CENTRAL IOWA. .DAY ONE...TODAY AND TONIGHT SNOW IS EXPECTED TO DEVELOP ACROSS THE AREA TODAY AND INCREASE IN INTENSITY OVERNIGHT WITH SNOWFALL AMOUNTS OF 3 TO 5 INCHES POSSIBLE BY 6 AM THURSDAY MORNING. AREAS OF BLOWING SNOW ARE ALSO EXPECTED AS NORTHWEST WINDS INCREASE TO 15 TO 20 MPH WITH HIGHER GUSTS. A WINTER STORM WATCH IS IN EFFECT FOR THE AREA. PLEASE REFER TO THE NATIONAL WEATHER SERVICE WEBSITE AT WEATHER.GOV/DESMOINES. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY AN ADDITIONAL INCH OF SNOW IS POSSIBLE THURSDAY MORNING WITH STORM TOTALS OF 4 TO 6 INCHES EXPECTED. A POLAR COLD FRONT WILL SWEEP THROUGH THE REGION ON FRIDAY AND WILL BRING MUCH COLDER AIR AND INCREASING NORTHWEST WINDS OF 20 TO 30 MPH WITH GUSTS TO 40 MPH. THIS WILL CREATE DANGEROUS WIND CHILLS OF 20 TO 35 BELOW ZERO FOR FRIDAY AFTERNOON AND FRIDAY NIGHT. IN ADDITION...THE STRONG NORTHWEST WINDS BLOWING THE FRESH SNOW COVER WILL CREATE NEAR BLIZZARD CONDITIONS AT TIMES. A WINTER STORM WATCH IS IN EFFECT FOR THE AREA. PLEASE REFER TO THE NATIONAL WEATHER SERVICE WEBSITE AT WEATHER.GOV/DESMOINES. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE REQUIRED THOUGH SNOWFALL REPORTS WOULD BE APPRECIATED. IAZ004>006-015-023-033-034-044-045-171115- EMMET-KOSSUTH-WINNEBAGO-PALO ALTO-POCAHONTAS-SAC-CALHOUN-CRAWFORD- CARROLL- 513 AM CST WED JAN 16 2008 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST IOWA MAINLY NORTHWEST OF A CARROLL TO NORTHWOOD LINE. .DAY ONE...TODAY AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY A POLAR COLD FRONT WILL SWEEP THROUGH THE REGION ON FRIDAY AND WILL BRING MUCH COLDER AIR AND INCREASING NORTHWEST WINDS OF 20 TO 30 MPH WITH GUSTS TO 40 MPH. THIS WILL CREATE DANGEROUS WIND CHILLS OF 25 TO 35 BELOW ZERO FOR FRIDAY AFTERNOON AND FRIDAY NIGHT. IN ADDITION...THE STRONG NORTHWEST WINDS BLOWING THE FRESH SNOW COVER WILL CREATE NEAR BLIZZARD CONDITIONS AT TIMES. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE REQUIRED. DONAVON
Nearby
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.