Alert archive / Iowa / Snow Advisories in 2005

Snow Advisory 3, NWS Quad Cities, IA

December 7, 200514 counties in Iowa; 11 counties in Illinois; Clark County, Scotland County, Missouri

NWS Quad Cities, IA issued this snow advisory at Dec 7, 2005, 2:38 PM CST for 14 counties in Iowa; 11 counties in Illinois; Clark County, Scotland County, Missouri. It took effect at Dec 8, 2005, 12:00 AM CST. It was in force for 23 hr.

The area

The counties it named.

The facts

Issued: Dec 7, 2005, 2:38 PM CST (20:38 UTC)
In effect from: Dec 8, 2005, 12:00 AM CST
Expired: Dec 8, 2005, 10:35 PM CST
In force: 23 hr
Issued by: NWS Quad Cities, IA

All 27 counties

Cedar County, IA, Clinton County, IA, Des Moines County, IA, Henry County, IA, Iowa County, IA, Jefferson County, IA, Johnson County, IA, Keokuk County, IA, Lee County, IA, Louisa County, IA, Muscatine County, IA, Scott County, IA, Van Buren County, IA, Washington County, IA, Bureau County, IL, Carroll County, IL, Hancock County, IL, Henderson County, IL, Henry County, IL, McDonough County, IL, Mercer County, IL, Putnam County, IL, Rock Island County, IL, Warren County, IL, Whiteside County, IL, Clark County, MO, Scotland County, MO

The radar

The Quad Cities radar (KDVN), 59 km from the middle of the area, began a volume at 20:42 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

Lincoln, IL (KILX), launched 12:00Z, 8.6 hours before the alert went out and 235 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1007 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 15 m²/s²
0-3 km storm-relative helicity: 84 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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 Quad Cities, IA wrote its last area forecast discussion before this snow advisory went out at Dec 7, 3:45 AM CST, 10 hours 53 minutes earlier.

Area forecast discussion, Dec 7, 3:45 AM CST, 10 hours 53 minutes before

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Hazardous weather outlook, Dec 7, 5:10 AM CST, 9 hours 28 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
510 AM CST WED DEC 7 2005

IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-081100-
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-
510 AM CST WED DEC 7 2005

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
BITTERLY COLD TEMPERATURES WILL BE OVER THE AREA AGAIN THIS
MORNING. IF YOU WILL BE GOING OUTSIDE EARLY THIS MORNING DRESS
APPROPRIATELY FOR THE COLD TEMPERATURES.  LAYER CLOTHING FOR
MAXIMUM WARMTH AND COVER AS MUCH EXPOSED SKIN AS POSSIBLE TO PROTECT
AGAINST FROSTBITE.

LIGHT SNOW IS EXPECTED TO DEVELOP OVER AREAS SOUTHWEST OF AN
INDEPENDENCE...QUAD CITIES LINE LATE TONIGHT.  BY THURSDAY MORNING
SNOWFALL AMOUNTS SHOULD RANGE FROM JUST OVER AN INCH IN NORTHEAST
MISSOURI TO AROUND A HALF INCH IN EAST CENTRAL IOWA.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

SNOW WILL SPREAD OVER MUCH OF THE AREA ON THURSDAY AS AN UPPER
LEVEL DISTURBANCE PASSES OVERHEAD. LATEST INDICATIONS SUGGEST 3 TO 5
INCHES OF SNOW MAY FALL SOUTHEAST OF A LINE FROM FAIRFIELD IOWA...TO
ALEDO...AND TO PRINCETON ILLINOIS BY THURSDAY EVENING. THERE MAY
EVEN BE SOME LOCALIZED HIGHER AMOUNTS IN THESE AREAS. 2 TO 4 INCHES
OF POWDERY SNOW ACCUMULATION WILL BE POSSIBLE ALONG AN AXIS FROM
SIGOURNEY...THROUGH THE QUAD CITY AREA...AND TO STERLING. LIGHTER
AMOUNTS IN THE 1 TO 3 INCH RANGE MAY OCCUR FROM MARENGO...TO
MAQUOKETA...AND TO FREEPORT. AREAS WEST OF DUBUQUE SUCH AS MANCHESTER
AND INDEPENDENCE MAY ONLY RECEIVE AN INCH OR LESS. AT THIS POINT...
THERE STILL IS SOME UNCERTAINTY OF THE EXACT TRACK OF THE SYSTEM AND
HOW MUCH MOISTURE IT WILL HAVE TO WORK WITH TO PRODUCE SNOW. THUS IT
IS RECOMMENDED TO STAY TUNED FOR FURTHER UPDATES AND POTENTIAL
ADVISORIES OR WARNINGS CONCERNING THIS WINTER STORM SYSTEM.

ALTHOUGH THE WINDS WILL BE ON THE LIGHT SIDE ON THURSDAY LIMITING
THE BLOWING AND DRIFTING SNOW POTENTIAL...AREA ROADS MAY STILL BECOME
SNOW PACKED AND SLIPPERY. THURSDAY TRAVELERS ARE URGED TO PREPARE FOR
POTENTIAL WINTER DRIVING CONDITIONS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED.

DLF/12

Nearby

Snow Advisories in Iowa, 2005 Snow Advisories in Illinois, 2005 Snow Advisories in Missouri, 2005 Every snow advisory in 2005

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.