Alert archive / Iowa / Winter Storm Warnings in 2009
Winter Storm Warning 4, NWS Quad Cities, IA
NWS Quad Cities, IA issued this winter storm warning at Apr 4, 2009, 3:43 PM CDT for 7 counties in Iowa; Jo Daviess County, Stephenson County, Illinois. It took effect at Apr 5, 2009, 4:00 AM CDT. It was in force for 16 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Apr 4, 2009, 3:43 PM CDT (20:43 UTC)
- In effect from
- Apr 5, 2009, 4:00 AM CDT
- Expired
- Apr 5, 2009, 7:33 PM CDT
- In force
- 16 hr
- Issued by
- NWS Quad Cities, IA
Counties Benton County, IA, Buchanan County, IA, Delaware County, IA, Dubuque County, IA, Jackson County, IA, Jones County, IA, Linn County, IA, Jo Daviess County, IL, Stephenson County, IL
The radar
The Quad Cities radar (KDVN), 84 km from the middle of the area, began a volume at 20:44 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
Davenport, (KDVN), launched 12:00Z, 8.7 hours before the alert went out and 86 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
- 1620 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- -62 m²/s²
- 0-3 km storm-relative helicity
- 11 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 KDVN 042043 WSWDVN URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE QUAD CITIES IA IL 343 PM CDT SAT APR 4 2009 ...POTENT WINTER STORM IS STILL ON TRACK FOR TONIGHT THROUGH SUNDAY NIGHT... .A POWERFUL EARLY SPRING STORM WILL PRODUCE A WIDE VARIETY OF WINTER WEATHER OVER THE AREA LATE TONIGHT THROUGH SUNDAY NIGHT. RAIN DEVELOPING THIS EVENING IS EXPECTED MIX WITH SLEET AND SNOW OVERNIGHT AND THEN CHANGE TO ALL SNOW BY SUNDAY AFTERNOON. THE SNOW IS EXPECTED TO CONTINUE INTO SUNDAY NIGHT. THUNDERSTORMS WILL ALSO BE POSSIBLE TONIGHT AND SUNDAY. DUE TO THE MIX OF PRECIPITATION AND ALSO THE POTENTIAL FOR THUNDERSTORMS...SNOW AND SLEET AMOUNTS WILL BE HIGHLY VARIABLE. AT THIS TIME IT APPEARS THAT AMOUNTS WILL BE IN THE 2 TO 6 INCH RANGE WITH LOCALLY HIGHER AMOUNTS BY MONDAY MORNING. VERY WINDY CONDITIONS ARE ALSO EXPECTED SUNDAY AND SUNDAY NIGHT WHICH COULD CREATE CONSIDERABLE BLOWING AND DRIFTING IN SOME AREAS. IAZ040>042-051>054-ILZ001-002-050445- /O.UPG.KDVN.WS.A.0004.090405T0900Z-090406T1200Z/ /O.NEW.KDVN.WS.W.0004.090405T0900Z-090406T1200Z/ BUCHANAN-DELAWARE-DUBUQUE-BENTON-LINN-JONES-JACKSON-JO DAVIESS- STEPHENSON- INCLUDING THE CITIES OF...INDEPENDENCE...MANCHESTER...DUBUQUE... VINTON...CEDAR RAPIDS...ANAMOSA...MAQUOKETA...GALENA...FREEPORT 343 PM CDT SAT APR 4 2009 ...WINTER STORM WARNING IN EFFECT FROM 4 AM SUNDAY TO 7 AM CDT MONDAY... THE NATIONAL WEATHER SERVICE IN QUAD CITIES HAS ISSUED A WINTER STORM WARNING FOR A MIX OF HEAVY SNOW AND SLEET FROM 4 AM SUNDAY TO 7 AM CDT MONDAY. THE WINTER STORM WATCH IS NO LONGER IN EFFECT. A MIXTURE OF RAIN...SLEET AND SNOW WILL DEVELOP OVERNIGHT... CHANGING TO SLEET AND THEN SNOW BY SUNDAY AFTERNOON. THE SLEET AND SNOW WILL BECOME HEAVY AT TIMES. THUNDERSTORMS WILL BE ALSO BE POSSIBLE LATE TONIGHT INTO SUNDAY. LOCATIONS THAT HAVE THUNDER SNOW AND SLEET COULD SEE INTENSE SNOW AND SLEET ACCUMULATION RATES. SNOW AND SLEET AMOUNTS WILL BE HIGHLY VARIABLE DUE TO THE MIXED PRECIPITATION AND THE POSSIBILITY OF THUNDERSTORMS. SOME AREAS COULD SEE SLEET ACCUMULATIONS TOTALING A HALF INCH TO AN INCH WITH SNOW TOTALS OF 2 TO 6 INCHES ON TOP OF THE SLEET. NORTHEAST WINDS OF 20 TO 30 MPH WITH GUSTS TO 40 MPH WILL MAKE FOR SOME DRIFTING AND BLOWING OF SNOW BY SUNDAY EVENING...RESULTING IN VERY LOW VISIBILITIES. SURFACE TEMPERATURES WILL FALL TO NEAR FREEZING RESULTING IN WINTER WEATHER DRIVING CONDITIONS ON MOST AREA ROADWAYS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING MEANS HEAVY SNOW ACCUMULATION AROUND 6 INCHES COMBINED WITH...SLEET ACCUMULATIONS OF A HALF INCH OR MORE ALONG WITH STRONG WINDS...ARE EXPECTED. THIS WILL MAKE TRAVEL VERY DANGEROUS OR IMPOSSIBLE...SO ONLY TRAVEL IN AN EMERGENCY AND TAKE YOUR WINTER SURVIVAL KIT. && $$ IAZ063>066-ILZ007-050445- /O.UPG.KDVN.WS.A.0004.090405T0900Z-090406T1200Z/ /O.NEW.KDVN.WW.Y.0010.090405T1200Z-090406T1200Z/ IOWA-JOHNSON-CEDAR-CLINTON-CARROLL- INCLUDING THE CITIES OF...MARENGO...IOWA CITY...TIPTON... CLINTON...MOUNT CARROLL 343 PM CDT SAT APR 4 2009 ...WINTER WEATHER ADVISORY IN EFFECT FROM 7 AM SUNDAY TO 7 AM CDT MONDAY... THE NATIONAL WEATHER SERVICE IN QUAD CITIES HAS ISSUED A WINTER WEATHER ADVISORY FOR 1 TO 4 INCHES OF SNOW AND SLEET...WHICH IS IN EFFECT FROM 7 AM SUNDAY TO 7 AM CDT MONDAY. THE WINTER STORM WATCH IS NO LONGER IN EFFECT RAIN AND A FEW THUNDERSTORMS ARE EXPECTED TO DEVELOP TONIGHT AND CONTINUE INTO SUNDAY MORNING. TEMPERATURES ARE EXPECTED TO FALL DURING THE DAY SUNDAY WHICH WILL CAUSE THE RAIN TO MIX WITH AND THEN CHANGE TO SLEET AND SNOW DURING THE MORNING. THE RAIN...SLEET AND SNOW MIX WITH THEN CHANGE TO ALL SNOW BY SUNDAY EVENING WITH THE SNOW CONTINUING INTO SUNDAY NIGHT. ACCUMULATIONS OF 2 TO 4 INCHES OF SNOW AND SLEET ARE EXPECTED BY THE TIME THE SNOW TAPERS OFF TO FLURRIES EARLY MONDAY MORNING. BLOWING AND DRIFTING SNOW IS POSSIBLE SUNDAY NIGHT AS NORTHWEST WINDS INCREASE TO 20 TO 30 MPH WITH GUSTS NEAR 40 MPH. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND BE CAREFUL WHILE DRIVING. && $$ IAZ067-068-076-077-ILZ009-015-050445- /O.NEW.KDVN.WW.Y.0010.090405T1200Z-090406T1200Z/ MUSCATINE-SCOTT-KEOKUK-WASHINGTON-WHITESIDE-ROCK ISLAND- INCLUDING THE CITIES OF...MUSCATINE...BETTENDORF...DAVENPORT... SIGOURNEY...WASHINGTON...STERLING...ROCK FALLS...MOLINE... ROCK ISLAND 343 PM CDT SAT APR 4 2009 ...WINTER WEATHER ADVISORY IN EFFECT FROM 7 AM SUNDAY TO 7 AM CDT MONDAY... THE NATIONAL WEATHER SERVICE IN QUAD CITIES HAS ISSUED A WINTER WEATHER ADVISORY FOR A MIX OF SNOW AND SLEET...WHICH IS IN EFFECT FROM 7 AM SUNDAY TO 7 AM CDT MONDAY. RAIN AND A FEW THUNDERSTORMS ARE EXPECTED TO DEVELOP TONIGHT AND CONTINUE INTO SUNDAY MORNING. TEMPERATURES ARE EXPECTED TO FALL DURING THE DAY SUNDAY WHICH WILL CAUSE THE RAIN TO MIX WITH AND THEN CHANGE TO SLEET AND SNOW DURING THE MORNING. THE RAIN...SLEET AND SNOW MIX WITH THEN CHANGE TO ALL SNOW BY SUNDAY EVENING WITH THE SNOW CONTINUING INTO SUNDAY NIGHT. ACCUMULATIONS OF 1 TO 3 INCHES OF SNOW AND SLEET ARE EXPECTED BY THE TIME THE SNOW TAPERS OFF TO FLURRIES EARLY MONDAY MORNING. BLOWING AND DRIFTING SNOW IS POSSIBLE SUNDAY NIGHT AS NORTHWEST WINDS INCREASE TO 20 TO 30 MPH WITH GUSTS NEAR 40 MPH. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND BE CAREFUL WHILE DRIVING. && $$
6 follow-up statements
000 WWUS43 KDVN 050413 WSWDVN URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE QUAD CITIES IA IL 1113 PM CDT SAT APR 4 2009 ...POTENT WINTER STORM IS STILL ON TRACK FOR SUNDAY MORNING THROUGH SUNDAY NIGHT... .A POWERFUL EARLY SPRING STORM WILL PRODUCE A WIDE VARIETY OF WINTER WEATHER OVER THE AREA EARLY SUNDAY MORNING THROUGH SUNDAY NIGHT. RAIN DEVELOPING DURING THE OVERNIGHT AND THROUGH EARLY SUNDAY IS EXPECTED MIX WITH SLEET AND SNOW THROUGH THE MORNING...THEN CHANGE TO ALL SNOW BY SUNDAY AFTERNOON. THE SNOW IS EXPECTED TO CONTINUE INTO SUNDAY NIGHT. THUNDERSTORMS WILL ALSO BE POSSIBLE. DUE TO THE MIX OF PRECIPITATION AND ALSO THE POTENTIAL FOR THUNDERSTORMS...SNOW AND SLEET AMOUNTS WILL BE HIGHLY VARIABLE. AT THIS TIME IT APPEARS THAT AMOUNTS WILL BE IN THE 2 TO 6 INCH RANGE WITH LOCALLY HIGHER AMOUNTS BY MONDAY MORNING. VERY WINDY CONDITIONS ARE ALSO EXPECTED SUNDAY AND SUNDAY NIGHT WHICH COULD CREATE CONSIDERABLE BLOWING AND DRIFTING IN SOME AREAS. IAZ040>042-051>054-ILZ001-002-051215- /O.CON.KDVN.WS.W.0004.090405T0900Z-090406T1200Z/ BUCHANAN-DELAWARE-DUBUQUE-BENTON-LINN-JONES-JACKSON-JO DAVIESS- STEPHENSON- INCLUDING THE CITIES OF...INDEPENDENCE...MANCHESTER...DUBUQUE... VINTON...CEDAR RAPIDS...ANAMOSA...MAQUOKETA...GALENA...FREEPORT 1113 PM CDT SAT APR 4 2009 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 4 AM SUNDAY TO 7 AM CDT MONDAY... A WINTER STORM WARNING REMAINS IN EFFECT FROM 4 AM SUNDAY TO 7 AM CDT MONDAY. A MIXTURE OF RAIN...SLEET AND SNOW WILL DEVELOP SUNDAY MORNING... CHANGING TO SLEET AND THEN SNOW BY SUNDAY AFTERNOON. THE SLEET AND SNOW WILL BECOME HEAVY AT TIMES. THUNDERSTORMS WILL BE ALSO BE POSSIBLE. LOCATIONS THAT HAVE THUNDER SNOW AND SLEET COULD SEE INTENSE SNOW AND SLEET ACCUMULATION RATES. SNOW AND SLEET AMOUNTS WILL BE HIGHLY VARIABLE DUE TO THE MIXED PRECIPITATION AND THE POSSIBILITY OF THUNDERSTORMS. SOME AREAS COULD SEE SLEET ACCUMULATIONS TOTALING A HALF INCH TO AN INCH WITH SNOW TOTALS OF 2 TO 6 INCHES ON TOP OF THE SLEET. NORTHEAST WINDS OF 20 TO 30 MPH WITH GUSTS TO 40 MPH WILL MAKE FOR SOME DRIFTING AND BLOWING OF SNOW BY SUNDAY EVENING... RESULTING IN VERY LOW VISIBILITIES. SURFACE TEMPERATURES WILL FALL TO NEAR FREEZING RESULTING IN WINTER WEATHER DRIVING CONDITIONS ON MOST AREA ROADWAYS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING MEANS HEAVY SNOW ACCUMULATION AROUND 6 INCHES COMBINED WITH...SLEET ACCUMULATIONS OF A HALF INCH OR MORE ALONG WITH STRONG WINDS...ARE EXPECTED. THIS WILL MAKE TRAVEL VERY DANGEROUS OR IMPOSSIBLE...SO ONLY TRAVEL IN AN EMERGENCY AND TAKE YOUR WINTER SURVIVAL KIT. && $$ IAZ063>068-076-077-ILZ007-009-015-051215- /O.CON.KDVN.WW.Y.0010.090405T1200Z-090406T1200Z/ IOWA-JOHNSON-CEDAR-CLINTON-MUSCATINE-SCOTT-KEOKUK-WASHINGTON- CARROLL-WHITESIDE-ROCK ISLAND- INCLUDING THE CITIES OF...MARENGO...IOWA CITY...TIPTON... CLINTON...MUSCATINE...BETTENDORF...DAVENPORT...SIGOURNEY... WASHINGTON...MOUNT CARROLL...STERLING...ROCK FALLS...MOLINE... ROCK ISLAND 1113 PM CDT SAT APR 4 2009 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 7 AM SUNDAY TO 7 AM CDT MONDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 7 AM SUNDAY TO 7 AM CDT MONDAY. RAIN AND A FEW THUNDERSTORMS ARE EXPECTED TO DEVELOP BY THE EARLY MORNING HOURS SUNDAY. TEMPERATURES ARE EXPECTED TO FALL DURING THE DAY SUNDAY WHICH WILL CAUSE THE RAIN TO MIX WITH AND THEN CHANGE TO SLEET AND SNOW AS THE MORNING PROGRESSES. THE RAIN... SLEET AND SNOW MIX WITH THEN CHANGE TO ALL SNOW BY SUNDAY EVENING WITH THE SNOW CONTINUING INTO SUNDAY NIGHT. ACCUMULATIONS OF 2 TO 4 INCHES OF SNOW AND SLEET ARE EXPECTED BY THE TIME THE SNOW TAPERS OFF TO FLURRIES EARLY MONDAY MORNING. BLOWING AND DRIFTING SNOW IS POSSIBLE SUNDAY NIGHT AS NORTHWEST WINDS INCREASE TO 20 TO 30 MPH WITH GUSTS NEAR 40 MPH. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND BE CAREFUL WHILE DRIVING. && $$ MAS
000 WWUS43 KDVN 050924 WSWDVN URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE QUAD CITIES IA IL 424 AM CDT SUN APR 5 2009 ...WINTER STORM TO AFFECT THE REGION TODAY AND TONIGHT... .A POWERFUL EARLY SPRING STORM WILL PRODUCE A WIDE VARIETY OF WINTER WEATHER OVER THE AREA TODAY AND TONIGHT. SHOWERS AND THUNDERSTORMS THAT DEVELOPED OVERNIGHT WILL BE REPLACED BY A MIXTURE OF RAIN...SLEET AND SNOW TODAY. THE PRECIPITATION WILL THEN CHANGE TO ALL SNOW LATE AFTERNOON INTO EARLY EVENING AS THE STORM CENTER MOVES INTO CENTRAL INDIANA. ACCUMULATIONS OF SNOW AND SLEET WILL RANGE FROM 3 TO 6 INCHES NORTH OF HIGHWAY 30...WITH 1 TO 3 INCHES OVER THE REMAINDER OF EASTERN IOWA AND NORTHWEST ILLINOIS BY LATE EVENING. STRONG WINDS WILL PRODUCE AREAS OF BLOWING SNOW IN THE AFTERNOON INTO EARLY EVENING...ESPECIALLY OVER EAST CENTRAL IOWA. IAZ040>042-051>054-ILZ001-002-051730- /O.CON.KDVN.WS.W.0004.000000T0000Z-090406T1200Z/ BUCHANAN-DELAWARE-DUBUQUE-BENTON-LINN-JONES-JACKSON-JO DAVIESS- STEPHENSON- INCLUDING THE CITIES OF...INDEPENDENCE...MANCHESTER...DUBUQUE... VINTON...CEDAR RAPIDS...ANAMOSA...MAQUOKETA...GALENA...FREEPORT 424 AM CDT SUN APR 5 2009 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 7 AM CDT MONDAY... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 7 AM CDT MONDAY. RAIN AND SNOW WILL CONTINUE ACROSS THE AREA THIS MORNING... POSSIBLY MIXED WITH SLEET AT TIMES. THE PRECIPITATION WILL CHANGE OVER TO A MIX OF SNOW AND SLEET IN THE AFTERNOON. ISOLATED THUNDERSTORMS WILL BE POSSIBLE IN THE MORNING INTO EARLY AFTERNOON. THESE WOULD MAY PRODUCE QUICK BURSTS OF HEAVY SLEET AND SNOW. PRECIPITATION WILL CHANGE OVER TO ALL SNOW BY LATE AFTERNOON AND CONTINUE INTO EVENING. NORTH TO NORTHEAST WINDS FROM 20 TO 30 MPH WILL RESULT IN AREAS OF BLOWING SNOW AND POOR VISIBILITY. TOTAL SNOW ACCUMULATIONS BY LATE EVENING ARE EXPECTED TO RANGE FROM 4 TO 6 INCHES. SOME AREAS MAY SEE SLEET ACCUMULATIONS UP TO A HALF INCH. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING MEANS HEAVY SNOW ACCUMULATIONS AROUND 6 INCHES...COMBINED WITH SLEET ACCUMULATIONS OF A HALF INCH OR MORE ALONG WITH STRONG WINDS...ARE EXPECTED. THIS WILL CREATE DANGEROUS TRAVEL CONDITIONS. TRAVEL ONLY IN AN EMERGENCY AND TAKE YOUR WINTER SURVIVAL KIT. && $$ IAZ063>068-076-077-ILZ007-009-015-051730- /O.CON.KDVN.WW.Y.0010.090405T1200Z-090406T1200Z/ IOWA-JOHNSON-CEDAR-CLINTON-MUSCATINE-SCOTT-KEOKUK-WASHINGTON- CARROLL-WHITESIDE-ROCK ISLAND- INCLUDING THE CITIES OF...MARENGO...IOWA CITY...TIPTON... CLINTON...MUSCATINE...BETTENDORF...DAVENPORT...SIGOURNEY... WASHINGTON...MOUNT CARROLL...STERLING...ROCK FALLS...MOLINE... ROCK ISLAND 424 AM CDT SUN APR 5 2009 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 7 AM CDT MONDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 7 AM CDT MONDAY. SCATTERED SHOWERS AND THUNDERSTORMS...MIXED WITH SLEET AND SNOW AT TIMES...WILL CONTINUE THIS MORNING. PRECIPITATION WILL CHANGE TO SLEET AND SNOW IN THE EARLY AFTERNOON...THEN CHANGE TO ALL SNOW BY EVENING WITH LIGHT SNOW CONTINUING OVERNIGHT. SNOW ACCUMULATIONS OF 2 TO 4 INCHES OF SNOW ARE EXPECTED...WITH UP TO A HALF INCH OF SLEET POSSIBLE TODAY. NORTHEAST TO NORTH WINDS INCREASING TO 20 TO 30 MPH WILL CAUSE AREAS OF BLOWING AND DRIFTING SNOW IN THE AFTERNOON. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW AND SLEET WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES. && $$ SHEETS
000 WWUS43 KDVN 051235 WSWDVN URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE QUAD CITIES IA IL 735 AM CDT SUN APR 5 2009 ...WINTER STORM TO AFFECT THE REGION TODAY AND TONIGHT... .A POWERFUL EARLY SPRING STORM WILL PRODUCE A WIDE VARIETY OF WINTER WEATHER OVER THE AREA TODAY AND TONIGHT. SHOWERS AND THUNDERSTORMS THAT DEVELOPED OVERNIGHT WILL BE REPLACED BY A MIXTURE OF RAIN...SLEET AND SNOW TODAY. THE PRECIPITATION WILL THEN CHANGE TO ALL SNOW LATE AFTERNOON INTO EARLY EVENING AS THE STORM CENTER MOVES INTO CENTRAL INDIANA. ACCUMULATIONS OF SNOW AND SLEET WILL RANGE FROM 3 TO 5 INCHES NORTH OF HIGHWAY 30... WITH 1 TO 3 INCHES OVER THE REMAINDER OF EASTERN IOWA AND NORTHWEST ILLINOIS BY LATE EVENING. STRONG WINDS WILL PRODUCE AREAS OF BLOWING SNOW IN THE AFTERNOON INTO EARLY EVENING... ESPECIALLY OVER EAST CENTRAL IOWA. IAZ040>042-051>054-ILZ001-002-052045- /O.CON.KDVN.WS.W.0004.000000T0000Z-090406T1200Z/ BUCHANAN-DELAWARE-DUBUQUE-BENTON-LINN-JONES-JACKSON-JO DAVIESS- STEPHENSON- INCLUDING THE CITIES OF...INDEPENDENCE...MANCHESTER...DUBUQUE... VINTON...CEDAR RAPIDS...ANAMOSA...MAQUOKETA...GALENA...FREEPORT 735 AM CDT SUN APR 5 2009 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 7 AM CDT MONDAY... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 7 AM CDT MONDAY. RAIN AND SNOW WILL BECOME MORE WIDESPREAD ACROSS THE AREA BY LATE MORNING. IT MAY BE MIXED WITH SLEET AT TIMES...AND A THUNDERSTORM IS POSSIBLE. THE PRECIPITATION WILL CHANGE OVER TO A MIX OF SNOW AND SLEET IN THE AFTERNOON. ANY THUNDERSTORMS MAY PRODUCE QUICK BURSTS OF HEAVY SLEET AND SNOW. PRECIPITATION WILL CHANGE OVER TO ALL SNOW BY LATE AFTERNOON AND CONTINUE INTO EVENING. NORTH TO NORTHEAST WINDS FROM 20 TO 30 MPH WILL RESULT IN AREAS OF BLOWING SNOW AND POOR VISIBILITY. TOTAL SNOW ACCUMULATIONS BY LATE EVENING ARE EXPECTED TO RANGE FROM 3 TO 5 INCHES. SOME AREAS MAY SEE SLEET ACCUMULATIONS UP TO A HALF INCH. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING MEANS HEAVY SNOW ACCUMULATIONS AROUND 6 INCHES...COMBINED WITH SLEET ACCUMULATIONS OF A HALF INCH OR MORE ALONG WITH STRONG WINDS...ARE EXPECTED. THIS WILL CREATE DANGEROUS TRAVEL CONDITIONS. TRAVEL ONLY IN AN EMERGENCY AND TAKE YOUR WINTER SURVIVAL KIT. && $$ IAZ063>068-076-077-ILZ007-009-015-052045- /O.EXT.KDVN.WW.Y.0010.090405T1500Z-090406T1200Z/ IOWA-JOHNSON-CEDAR-CLINTON-MUSCATINE-SCOTT-KEOKUK-WASHINGTON- CARROLL-WHITESIDE-ROCK ISLAND- INCLUDING THE CITIES OF...MARENGO...IOWA CITY...TIPTON... CLINTON...MUSCATINE...BETTENDORF...DAVENPORT...SIGOURNEY... WASHINGTON...MOUNT CARROLL...STERLING...ROCK FALLS...MOLINE... ROCK ISLAND 735 AM CDT SUN APR 5 2009 ...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 7 AM CDT MONDAY... THE WINTER WEATHER ADVISORY IS NOW IN EFFECT FROM 10 AM CDT THIS MORNING UNTIL 7 AM CDT MONDAY. SCATTERED SHOWERS AND THUNDERSTORMS...MIXED WITH SLEET AND SNOW AT TIMES...WILL REDEVELOP OVER THE AREA BY LATE MORNING. PRECIPITATION WILL CHANGE TO SLEET AND SNOW IN THE EARLY AFTERNOON...THEN BECOME ALL SNOW BY EVENING WITH LIGHT SNOW CONTINUING OVERNIGHT. SNOW ACCUMULATIONS OF 1 TO 3 INCHES OF SNOW ARE EXPECTED...WITH UP TO A HALF INCH OF SLEET POSSIBLE TODAY. NORTHEAST TO NORTH WINDS INCREASING TO 20 TO 30 MPH WILL CAUSE AREAS OF BLOWING AND DRIFTING SNOW IN THE AFTERNOON. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW AND SLEET WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES. && $$ DLS
000 WWUS43 KDVN 051622 WSWDVN URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE QUAD CITIES IA IL 1122 AM CDT SUN APR 5 2009 ...WINTER STORM TO AFFECT THE REGION TODAY AND TONIGHT... .A EARLY SPRING STORM WILL PRODUCE A VARIETY OF WINTER WEATHER OVER THE AREA THROUGH TONIGHT. A MIX OF RAIN...SLEET AND SNOW TODAY WILL CONTINUE TO DEVELOP IN THE NORTH AND THEN SPREAD SOUTH AND EAST THIS AFTERNOON AND THIS EVENING. THE PRECIPITATION WILL THEN CHANGE TO ALL SNOW LATE AFTERNOON INTO EARLY EVENING AS THE STORM CENTER MOVES INTO CENTRAL INDIANA. A FEW THUNDERSTORMS WILL ALSO BE POSSIBLE THIS AFTERNOON WHERE THE SNOW IS OCCURRING. ACCUMULATIONS OF SNOW AND SLEET WILL RANGE FROM 3 TO 5 INCHES NORTH OF HIGHWAY 30 IN EASTERN IOWA... WITH 1 TO 3 INCHES OVER THE REMAINDER OF EASTERN IOWA AND NORTHWEST ILLINOIS BY LATE EVENING. STRONG WINDS WILL PRODUCE AREAS OF BLOWING SNOW IN THE AFTERNOON INTO EARLY EVENING... ESPECIALLY OVER EAST CENTRAL IOWA. IAZ054-ILZ001-002-060030- /O.CAN.KDVN.WS.W.0004.000000T0000Z-090406T1200Z/ /O.EXA.KDVN.WW.Y.0010.000000T0000Z-090406T1200Z/ JACKSON-JO DAVIESS-STEPHENSON- INCLUDING THE CITIES OF...MAQUOKETA...GALENA...FREEPORT 1122 AM CDT SUN APR 5 2009 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 7 AM CDT MONDAY... ...WINTER STORM WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN QUAD CITIES HAS ISSUED A WINTER WEATHER ADVISORY FOR A MIX OF SLEET AND SNOW AND STRONG WINDS...WHICH IS IN EFFECT UNTIL 7 AM CDT MONDAY. THE WINTER STORM WARNING HAS BEEN CANCELLED. IT APPEARS THAT SNOW AND SLEET AMOUNTS WILL BE LESS THAN ORIGINALLY EXPECTED BUT STILL ENOUGH TO CREATE SOME TRAVEL DIFFICULTIES LATE THIS AFTERNOON AND TONIGHT...ESPECIALLY WHEN COMBINED WITH STRONG WINDS. SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS...MIXED WITH SLEET AND SNOW AT TIMES...WILL REDEVELOP OVER THE AREA BY BY EARLY AFTERNOON. THE PRECIPITATION WILL CHANGE TO SLEET AND SNOW IN THE EARLY AFTERNOON...THEN BECOME ALL SNOW BY EVENING WITH LIGHT SNOW CONTINUING OVERNIGHT. SNOW ACCUMULATIONS OF 1 TO 3 INCHES OF SNOW ARE EXPECTED...WITH UP TO A HALF INCH OF SLEET POSSIBLE TODAY. NORTHEAST TO NORTH WINDS INCREASING TO 20 TO 30 MPH AND GUSTING OVER 40 MPH WILL CAUSE AREAS OF BLOWING AND DRIFTING SNOW TONIGHT. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW AND SLEET WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES. && $$ IAZ040>042-051>053-060030- /O.CON.KDVN.WS.W.0004.000000T0000Z-090406T1200Z/ BUCHANAN-DELAWARE-DUBUQUE-BENTON-LINN-JONES- INCLUDING THE CITIES OF...INDEPENDENCE...MANCHESTER...DUBUQUE... VINTON...CEDAR RAPIDS...ANAMOSA 1122 AM CDT SUN APR 5 2009 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 7 AM CDT MONDAY... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 7 AM CDT MONDAY. RAIN AND SNOW WILL BECOME MORE WIDESPREAD ACROSS THE AREA THIS AFTERNOON. IT MAY BE MIXED WITH SLEET AT TIMES...AND A THUNDERSTORM IS POSSIBLE. THE PRECIPITATION WILL CHANGE OVER TO A MIX OF SNOW AND SLEET IN THE AFTERNOON. ANY THUNDERSTORMS MAY PRODUCE QUICK BURSTS OF HEAVY SLEET AND SNOW. PRECIPITATION WILL CHANGE OVER TO ALL SNOW BY LATE AFTERNOON AND CONTINUE INTO EVENING. NORTH TO NORTHEAST WINDS FROM 20 TO 30 MPH...GUSTING OVER 40 MPH WILL RESULT IN AREAS OF BLOWING SNOW AND POOR VISIBILITY. TOTAL SNOW ACCUMULATIONS BY LATE EVENING ARE EXPECTED TO RANGE FROM 3 TO 5 INCHES. SOME AREAS MAY SEE SLEET ACCUMULATIONS UP TO A HALF INCH. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING MEANS HEAVY SNOW ACCUMULATIONS AROUND 6 INCHES...COMBINED WITH SLEET ACCUMULATIONS OF A HALF INCH OR MORE ALONG WITH STRONG WINDS...ARE EXPECTED. THIS WILL CREATE DANGEROUS TRAVEL CONDITIONS. TRAVEL ONLY IN AN EMERGENCY AND TAKE YOUR WINTER SURVIVAL KIT. && $$ IAZ063>068-076-077-ILZ007-009-015-060030- /O.CON.KDVN.WW.Y.0010.000000T0000Z-090406T1200Z/ IOWA-JOHNSON-CEDAR-CLINTON-MUSCATINE-SCOTT-KEOKUK-WASHINGTON- CARROLL-WHITESIDE-ROCK ISLAND- INCLUDING THE CITIES OF...MARENGO...IOWA CITY...TIPTON... CLINTON...MUSCATINE...BETTENDORF...DAVENPORT...SIGOURNEY... WASHINGTON...MOUNT CARROLL...STERLING...ROCK FALLS...MOLINE... ROCK ISLAND 1122 AM CDT SUN APR 5 2009 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 7 AM CDT MONDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 7 AM CDT MONDAY. SCATTERED SHOWERS AND THUNDERSTORMS WILL BECOME MIXED WITH SLEET AND SNOW AT TIMES THIS AFTERNOON. THE PRECIPITATION WILL CHANGE TO ALL SLEET AND SNOW IN THE EARLY AFTERNOON...THEN BECOME ALL SNOW BY EVENING WITH LIGHT SNOW CONTINUING OVERNIGHT. SNOW ACCUMULATIONS OF 1 TO 3 INCHES OF SNOW ARE EXPECTED...WITH UP TO A HALF INCH OF SLEET POSSIBLE TODAY. NORTHEAST TO NORTH WINDS INCREASING TO 20 TO 30 MPH...GUSTING OVER 40 MPH WILL CAUSE AREAS OF BLOWING AND DRIFTING SNOW IN THE AFTERNOON. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW AND SLEET WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES. && $$
000 WWUS43 KDVN 052100 WSWDVN URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE QUAD CITIES IA IL 400 PM CDT SUN APR 5 2009 ...WINTER STORM TO AFFECT THE REGION TONIGHT... .SIGNIFICANT SNOWFALL IS STILL POSSIBLE AS AN EARLY SPRING STORM MOVES AWAY FROM THE REGION TONIGHT. SNOW...HEAVY AT TIMES... WILL CONTINUE EARLY THIS EVENING IN THE NORTH. A MIX OF RAIN SLEET AND SNOW WILL GRADUALLY SPREAD SOUTH AND CHANGE TO ALL SNOW LATER THIS EVENING. THUNDER SNOW WILL ALSO BE POSSIBLE IN THE NORTH THIS EVENING. ACCUMULATIONS OF SNOW AND SLEET WILL RANGE FROM 3 TO 5 INCHES NORTH OF HIGHWAY 30 IN EASTERN IOWA WITH AMOUNTS TAPERING OFF RAPIDLY TO THE SOUTH. IAZ053-060500- /O.CAN.KDVN.WS.W.0004.000000T0000Z-090406T1200Z/ /O.EXA.KDVN.WW.Y.0010.000000T0000Z-090406T1200Z/ JONES- INCLUDING THE CITY OF...ANAMOSA 400 PM CDT SUN APR 5 2009 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 7 AM CDT MONDAY... ...WINTER STORM WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN QUAD CITIES HAS ISSUED A WINTER WEATHER ADVISORY FOR 1 TO 3 INCHES OF SNOW AND STRONG NORTH WINDS GUSTING AROUND 40 MPH AT TIMES...WHICH IS IN EFFECT UNTIL 7 AM CDT MONDAY. THE WINTER STORM WARNING HAS BEEN CANCELLED. SNOW AND SLEET AMOUNTS WILL BE LESS THAN ORIGINALLY EXPECTED BUT STILL ENOUGH TO CREATE SOME TRAVEL DIFFICULTIES LATE THIS TONIGHT...ESPECIALLY WHEN COMBINED WITH STRONG WINDS. A MIX OF RAIN...SLEET AND SNOW IS EXPECTED TO DEVELOP BY EARLY EVENING THEN CHANGE TO ALL SNOW. THE SNOW IS EXPECTED TO TAPER OFF TO FLURRIES. SNOW ACCUMULATIONS OF 1 TO 3 INCHES OF SNOW ARE EXPECTED BY LATE TONIGHT. NORTHEAST TO NORTH WINDS INCREASING TO 20 TO 30 MPH AND GUSTING AROUND 40 MPH MAY CAUSE AREAS OF BLOWING AND DRIFTING SNOW TONIGHT. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW AND SLEET WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES. && $$ IAZ067-068-ILZ009-015-052200- /O.CAN.KDVN.WW.Y.0010.000000T0000Z-090406T1200Z/ MUSCATINE-SCOTT-WHITESIDE-ROCK ISLAND- INCLUDING THE CITIES OF...MUSCATINE...BETTENDORF...DAVENPORT... STERLING...ROCK FALLS...MOLINE...ROCK ISLAND 400 PM CDT SUN APR 5 2009 ...WINTER WEATHER ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN QUAD CITIES HAS CANCELLED THE WINTER WEATHER ADVISORY. IT APPEARS THAT THE HEAVIEST SNOW WILL STAY NORTH OF THE AREA TONIGHT. A MIX OF RAIN AND SNOW SHOULD DEVELOP BY EARLY THIS EVENING AND CHANGE TO ALL SNOW BY LATE THIS EVENING. SNOWFALL AMOUNTS AROUND AN INCH ARE POSSIBLE. STRONG NORTH WINDS ARE ALSO EXPECTED OVER NIGHT WITH GUSTS AROUND 40 MPH POSSIBLE AT TIMES. $$ IAZ040>042-051-052-060500- /O.CON.KDVN.WS.W.0004.000000T0000Z-090406T1200Z/ BUCHANAN-DELAWARE-DUBUQUE-BENTON-LINN- INCLUDING THE CITIES OF...INDEPENDENCE...MANCHESTER...DUBUQUE... VINTON...CEDAR RAPIDS 400 PM CDT SUN APR 5 2009 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 7 AM CDT MONDAY... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 7 AM CDT MONDAY. SNOW WILL BECOME MORE WIDESPREAD ACROSS THE AREA BY EARLY EVENING. IT MAY BE MIXED WITH SLEET AT TIMES. A FEW THUNDERSTORMS WILL ALSO OCCUR AND WILL PRODUCE QUICK BURSTS OF HEAVY SNOW. NORTH TO NORTHEAST WINDS FROM 20 TO 30 MPH...GUSTING AROUND 40 MPH WILL RESULT IN AREAS OF BLOWING SNOW AND POOR VISIBILITY OVERNIGHT. TOTAL SNOW ACCUMULATIONS BY LATE TONIGHT ARE EXPECTED TO RANGE FROM 3 TO 5 INCHES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING MEANS HEAVY SNOW ACCUMULATIONS AROUND 6 INCHES...COMBINED WITH SLEET ACCUMULATIONS OF A HALF INCH OR MORE ALONG WITH STRONG WINDS...ARE EXPECTED. THIS WILL CREATE DANGEROUS TRAVEL CONDITIONS. TRAVEL ONLY IN AN EMERGENCY AND TAKE YOUR WINTER SURVIVAL KIT. && $$ IAZ054-063>066-076-077-ILZ001-002-007-060500- /O.CON.KDVN.WW.Y.0010.000000T0000Z-090406T1200Z/ JACKSON-IOWA-JOHNSON-CEDAR-CLINTON-KEOKUK-WASHINGTON-JO DAVIESS- STEPHENSON-CARROLL- INCLUDING THE CITIES OF...MAQUOKETA...MARENGO...IOWA CITY... TIPTON...CLINTON...SIGOURNEY...WASHINGTON...GALENA...FREEPORT... MOUNT CARROLL 400 PM CDT SUN APR 5 2009 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 7 AM CDT MONDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 7 AM CDT MONDAY. A MIX OF RAIN SLEET AND SNOW WILL CONTINUE TO DEVELOP OVER THE AREA AND SHOULD CHANGE TO ALL SNOW EARLY THIS EVENING. AN ISOLATED THUNDERSTORM WITH HEAVY SNOW IS ALSO POSSIBLE. THE SNOW IS EXPECTED TO TAPER OFF TO FLURRIES LATE TONIGHT. SNOW ACCUMULATIONS OF 1 TO 3 INCHES OF SNOW ARE EXPECTED. NORTHEAST TO NORTH WINDS INCREASING TO 20 TO 30 MPH AND GUSTING AROUND 40 MPH WILL CAUSE AREAS OF BLOWING AND DRIFTING SNOW TONIGHT. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW AND SLEET WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES. && $$
000 WWUS43 KDVN 060033 WSWDVN URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE QUAD CITIES IA IL 733 PM CDT SUN APR 5 2009 IAZ040>042-051-052-060145- /O.CAN.KDVN.WS.W.0004.000000T0000Z-090406T1200Z/ BUCHANAN-DELAWARE-DUBUQUE-BENTON-LINN- INCLUDING THE CITIES OF...INDEPENDENCE...MANCHESTER...DUBUQUE... VINTON...CEDAR RAPIDS 733 PM CDT SUN APR 5 2009 ...WINTER STORM WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN QUAD CITIES HAS CANCELLED THE WINTER STORM WARNING. AIR AND GROUND TEMPERATURES ABOVE FREEZING WILL PRECLUDE SIGNIFICANT SNOW ACCUMULATIONS AND WIDESPREAD HAZARDOUS TRAVEL CONDITIONS. THEREFORE...THE WINTER STORM WARNING HAS BEEN CANCELLED. $$ IAZ053-054-063>066-076-077-ILZ001-002-007-060145- /O.CAN.KDVN.WW.Y.0010.000000T0000Z-090406T1200Z/ JONES-JACKSON-IOWA-JOHNSON-CEDAR-CLINTON-KEOKUK-WASHINGTON- JO DAVIESS-STEPHENSON-CARROLL- INCLUDING THE CITIES OF...ANAMOSA...MAQUOKETA...MARENGO... IOWA CITY...TIPTON...CLINTON...SIGOURNEY...WASHINGTON...GALENA... FREEPORT...MOUNT CARROLL 733 PM CDT SUN APR 5 2009 ...WINTER WEATHER ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN QUAD CITIES HAS CANCELLED THE WINTER WEATHER ADVISORY. AIR AND GROUND TEMPERATURES ABOVE FREEZING WILL PRECLUDE SIGNIFICANT SNOW ACCUMULATIONS. THEREFORE...THE WINTER WEATHER ADVISORY HAS BEEN CANCELLED. $$
What forecasters said that day
The local office's own words before this winter storm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Quad Cities, IA wrote its last area forecast discussion before this winter storm warning went out at Apr 4, 2:58 PM CDT, 45 minutes earlier.
Area forecast discussion, Apr 4, 2:58 PM CDT, 45 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
258 PM CDT SAT APR 4 2009
.SYNOPSIS...
12Z UA ANALYSIS SHOWED UPPER LOW HAD CLOSED OFF OVER THE CENTRAL
ROCKIES WITH THE H8 LOW IN WRN KS. S-SW H8 FLOW AHEAD OF THE LOW
WAS VERY DRY THIS MORNING...HOWEVER ELEVATED SHRA/TSRA WERE
BREAKING OUT THIS AFTERNOON OVER ERN KS/WRN MO SO SOME MOISTURE
WAS GETTING ENTRAINED INTO THE SYSTEM. AT THE SURFACE EARLY THIS
AFTERNOON THE MAIN SURFACE LOW WAS LIFTING NE THROUGH SRN KS WITH
THE WARM FRONT STRETCHING EAST THROUGH CNTRL AND SE MO.
&&
.SHORT TERM...TONIGHT THROUGH SUNDAY NIGHT...
THE NAM AND 00Z/12Z ECMWF WERE VERY SIMILAR WITH THE TRACK OF THE
SURFACE LOW THROUGH NRN MO SUNDAY WHILE THE GFS WAS SEVERAL HOURS
FASTER. RELIED MAINLY ON THE NAM FOR THE THIS
FORECAST...ESPECIALLY THE THERMAL FIELDS AND FORCING. EXPECT
SHRA/TSRA TO DEVELOP/MOVE INTO THE AREA THIS EVENING AS GULF
MOISTURE ARRIVES AND STRONG LOW LEVEL FORCING SETS UP ALONG H8
WARM FRONT LIFTING INTO SRN IA/W CENTRAL IL. AFTER MIDNIGHT LOW
LEVEL TEMPS TO COOL ENOUGH TO CHANGE PCPN IN THE NORTH TO A MIX OF
RN/SN/PL. THE MIX WILL SPREAD SOUTH TO THE I80 CORRIDOR BY LATE
SUNDAY MORNING. THEN AS THE SURFACE LOW HEADS THROUGH IL THE CAA
WITH INCREASE CAUSING THE MIX IN THE NORTH TO GO TO ALL SNOW WITH
THIS CHANGE OVER MOVING SOUTH THROUGH THE AFTERNOON. EXPECT SNOW
THEN OVER MOST OF THE AREA SUNDAY NIGHT AS DEF ZONE MOVES ACROSS
THE REGION. MODELS CONTINUE TO KEEP STEEP MID LEVEL LAPSE RATES
OVER THE AREA THROUGH SUNDAY WHICH SUPPORTS THE POSSIBILITY OF
THUNDER. OF COURSE ANY THUNDER SNOW OR SLEET COULD GREATLY ENHANCE
SNOW/SLEET AMOUNTS IN SOME AREAS. THE WINTER STORM WATCH HAS BEEN
CHANGED TO A WINTER STORM WARNING ALONG AND NORTH OF A CEDAR
RAPIDS/FREEPORT LINE FOR 4 TO 6 INCHES OF SNOW AND SLEET. IN SOME
AREAS SLEET ACCUMULATIONS ALONE COULD BE IN THE HALF INCH TO ONE
INCH CATEGORY. A WINTER WX ADVISORY HAS BEEN ISSUED SOUTH OF THE
WARNING AND INCLUDES IOWA CITY...THE QUAD CITIES AND THE
STERLING/ROCK FALLS AREA. SNOW/SLEET ACCUMULATIONS IN THE ADVISORY
AREA ARE EXPECTED TO BE IN THE 1 TO 3 INCH RANGE. OVER THE REST OF
THE AREA AMOUNTS UP TO AN INCH ARE POSSIBLE. STRONG N-NW WINDS
GUSTING TO 30 TO 40 MPH ARE ALSO EXPECTED TO DEVELOP AS THE SYSTEM
MOVES THROUGH THE AREA SUNDAY. IN AREAS WHERE THE GREATER SNOW
ACCUMULATIONS OCCUR...THE WIND WILL CAUSE CONSIDERABLE BLOWING AND
DRIFTING. ...DLF...
.LONG TERM...MONDAY THROUGH NEXT SATURDAY...
.MONDAY AND TUESDAY...AN ENERGETIC UPPER AIR PATTERN WILL CONTINUE
THROUGH THE EXTENDED FORECAST PERIOD WITH A BROAD LONG WAVE TROF
DEVELOPING OVER THE EASTERN HALF OF THE COUNTRY AND A UPPER LEVEL
RIDGE DEVELOPING OVER THE ROCKIES. THE ECMWF/GFS PROG SEVERAL SHORT
WAVES AND AREAS OF CHANNELED VORTICITY TO MOVE THROUGH THE EASTERN
TROF FROM MONDAY INTO TUESDAY. THESE SHORT WAVES AND VORTICITY...
COMBINED WITH COLD AIR ALOFT...SHOULD PRODUCE SNOW SHOWERS OVER THE
REGION FROM MONDAY INTO TUESDAY. OVERALL LITTLE SNOW ACCUMULATION IS
EXPECTED...BUT A QUICK INCH OR TWO OF SNOW IS POSSIBLE IN A FEW OF
THE HEAVIER SNOW SHOWERS. TEMPERATURES WILL BE WELL BELOW NORMAL AS
BLUSTERY NORTHWEST WINDS BUILD COLD CANADIAN HIGH PRESSURE ACROSS
THE UPPER MID WEST. DAYTIME HIGHS WILL ONLY BE IN THE MID TO UPPER
30S ON MONDAY AND IN THE MID 40S ON TUESDAY.
.WEDNESDAY THROUGH SATURDAY...WEDNESDAY WILL BE SUNNY AND CONTINUED
COOL WITH THE NEXT CHANCE FOR PRECIPITATION COMING FROM THURSDAY
INTO FRIDAY. THERE ARE SIGNIFICANT MODEL DISCREPANCIES WITH HANDLING
THE TIMING AND PLACEMENT OF THE NEXT SYSTEM APPROACHING THE AREA.
THE 12Z SAT RUN OF THE GFS IS FASTER THAN THE ECMWF AND PROGS A
CLOSED UPPER LOW TO BE LOCATED OVER KANSAS AT 12Z THURSDAY AND MOVE
DUE EAST TO NEAR KENTUCKY BY 12Z FRIDAY. THE ECMWF HOWEVER...DOES
NOT GENERATE A CLOSED UPPER LOW...BUT INSTEAD PHASES A NORTHERN
STREAM SHORT WAVE WITH A SOUTHERN STREAM WAVE NEAR OUR FORECAST AREA
ON FRIDAY. WITH THESE MODEL DIFFERENCES...I WILL MAINTAIN THE
CURRENT FORECAST OF A CHANCE OF RAIN ON THURSDAY WITH A CHANCE OF
RAIN/SNOW THURSDAY NIGHT INTO FRIDAY. NEXT SATURDAY SHOULD BE DRY
AND WARMER AS THE MODELS PROG AN UPPER LEVEL RIDGE TO BUILD OVER THE
MIDWEST. ..KUHL..
&&
.AVIATION...
VFR CONDITIONS ARE EXPECTED AT ALL TAF SITES THROUGH
050300. STRONG EASTERLY WINDS WITH GUSTS UP TO 30KT WILL DEVELOP
BETWEEN 042200 AND 050300 AS DEEPENING LOW PRESSURE APPROACHES FROM
THE SOUTHWEST. MVR CONDITIONS WITH AREAS -SHRA WILL DEVELOP AT
KDBQ/KCID BY 05300...MIX WITH PL BETWEEN 050600 AND 051000...AND
CHANGE TO ALL SNOW AROUND 051200 WITH IFR CIGS/VSBYS. -SHRA WILL MIX
WITH PL AND CHANGE TO ALL SNOW AT KMLI AROUND 051500. THE PRECIP
SHOULD REMAIN AS MIXED RA/SN AT KBRL ON SUN WITH IFR CIGS/VSBYS.
-TSRA WILL BE POSSIBLE IN VCNTY OF TAF SITES AFTER 050600. ..KUHL..
&&
.DVN WATCHES/WARNINGS/ADVISORIES...
IA...WINTER WEATHER ADVISORY FROM 7 AM SUNDAY TO 7 AM CDT MONDAY FOR
CEDAR-CLINTON-IOWA-JOHNSON-KEOKUK-MUSCATINE-SCOTT-
WASHINGTON.
WINTER STORM WARNING FROM 4 AM SUNDAY TO 7 AM CDT MONDAY FOR
BENTON-BUCHANAN-DELAWARE-DUBUQUE-JACKSON-JONES-LINN.
IL...WINTER WEATHER ADVISORY FROM 7 AM SUNDAY TO 7 AM CDT MONDAY FOR
CARROLL-ROCK ISLAND-WHITESIDE.
WINTER STORM WARNING FROM 4 AM SUNDAY TO 7 AM CDT MONDAY FOR JO
DAVIESS-STEPHENSON.
MO...NONE.
&&
DLF/KUHLHazardous weather outlook, Apr 4, 5:05 AM CDT, 10 hours 38 minutes before
HAZARDOUS WEATHER OUTLOOK...CORRECTION NATIONAL WEATHER SERVICE QUAD CITIES IA IL 505 AM CDT SAT APR 4 2009 ...WINTER STORM WATCH IN EFFECT LATE TONIGHT THROUGH SUNDAY NIGHT FOR LOCATIONS ALONG AND NORTH OF HIGHWAY 30... IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007- 009-015>018-024>026-034-035-MOZ009-010-050900- BENTON IA-BUCHANAN IA-BUREAU IL-CARROLL IL-CEDAR IA-CLARK MO-CLINTON IA-DELAWARE IA-DES MOINES IA-DUBUQUE IA-HANCOCK IL-HENDERSON IL-HENRY IA-HENRY IL-IOWA IA-JACKSON IA-JEFFERSON IA-JO DAVIESS IL-JOHNSON IA- JONES IA-KEOKUK IA-LEE IA-LINN IA-LOUISA IA-MCDONOUGH IL-MERCER IL- MUSCATINE IA-PUTNAM IL-ROCK ISLAND IL-SCOTLAND MO-SCOTT IA- STEPHENSON IL-VAN BUREN IA-WARREN IL-WASHINGTON IA-WHITESIDE IL- 505 AM CDT SAT APR 4 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL ILLINOIS...NORTHWEST ILLINOIS...WEST CENTRAL ILLINOIS...EAST CENTRAL IOWA...NORTHEAST IOWA...SOUTHEAST IOWA AND NORTHEAST MISSOURI. .DAY ONE...TODAY AND TONIGHT TONIGHT...A STRONG...EARLY SPRING STORM SYSTEM WILL ARRIVE AFTER MIDNIGHT. THE SYSTEM WILL PRODUCE AREAS OF RAIN AND EMBEDDED THUNDERSTORMS. THE RAIN WILL MIX WITH OR CHANGE TO SLEET AND SNOW... HEAVY AT TIMES ALONG AND NORTH OF HIGHWAY 30. SIGNIFICANT SLEET AND SNOW ACCUMULATIONS ARE POSSIBLE BY DAYBREAK. EMBEDDED THUNDERSTORMS SOME...WITH THUNDER-SLEET AND THUNDER-SNOW NORTH OF I-80 MAY DEVELOP TOWARD DAYBREAK. A WINTER STORM WATCH IS IN EFFECT LATE TONIGHT THROUGH SUNDAY NIGHT...PLEASE LATEST LOCAL PUBLIC FORECAST PRODUCTS FOR THE LATEST INFORMATION. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY SUNDAY AND SUNDAY NIGHT...A MIXTURE OF RAIN...SLEET AND SNOW WILL CHANGE TO SNOW BY LATE AFTERNOON. SIGNIFICANT AMOUNTS OF SLEET AND SNOW WITH ACCUMULATIONS OF 2 TO 6 INCHES ARE EXPECTED ALONG AND ESPECIALLY NORTH OF I-80. EMBEDDED THUNDERSTORMS WILL BE POSSIBLE INTO EARLY AFTERNOON WITH SMALL HAIL UP TO THE SIZE OF DIMES POSSIBLE ALONG AND SOUTH OF HIGHWAY 34. NORTHEAST...THEN NORTH WINDS OF 20 TO 25 MPH WITH GUSTS UP TO 40 MPH WILL RESULT IN LOCALIZED BLOWING AND DRIFTING OF ANY SIGNIFICANT SNOW SUNDAY EVENING. INTERESTED INDIVIDUALS SHOULD MONITOR THIS PRODUCT FOR ANY UPDATES ON THIS WEATHER SITUATION. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT. REPORTS OF SNOW AND SLEET WOULD BE APPRECIATED. SHEETS/NICHOLS
The office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 4, 4:00 AM CDT | Winter Storm Watch | DVN | Benton, Buchanan, Cedar, Clinton, Delaware, Dubuque and 5 more | 12 hr |
| Apr 4, 3:43 PM CDT | Winter Weather Advisory | DVN | Cedar, Clinton, Iowa, Jackson, Johnson, Jones and 4 more | 28 hr |
Nearby
Winter Storm Warnings in Iowa, 2009Winter Storm Warnings in Illinois, 2009Every winter storm warning in 2009
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.