Alert archive / Iowa / Winter Storm Warnings in 2009

Winter Storm Warning 1, NWS Quad Cities, IA

January 10, 20098 counties in Iowa; Jo Daviess County, Stephenson County, Illinois

NWS Quad Cities, IA issued this winter storm warning at Jan 10, 2009, 3:04 AM CST for 8 counties in Iowa; Jo Daviess County, Stephenson County, Illinois. It was in force for 9 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
Jan 10, 2009, 3:04 AM CST (09:04 UTC)
Expired
Jan 10, 2009, 12:00 PM CST
In force
9 hr
Issued by
NWS Quad Cities, IA

Counties Benton County, IA, Cedar County, IA, Dubuque County, IA, Iowa County, IA, Jackson County, IA, Johnson County, IA, Jones County, IA, Linn County, IA, Jo Daviess County, IL, Stephenson County, IL

The radar

The Quad Cities radar (KDVN), 67 km from the middle of the area, began a volume at 09:05 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 00:00Z, 9.1 hours before the alert went out and 71 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-pSkew-T log-p diagram, Davenport, at 00:00Z on 2009-01-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Davenport, at 00:00Z on 2009-01-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 61 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
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
667 m above ground
0-6 km bulk shear
71 kt
0-1 km storm-relative helicity
61 m²/s²
0-3 km storm-relative helicity
63 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 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 Jan 9, 10:22 PM CST, 4 hours 42 minutes earlier.

Area forecast discussion, Jan 9, 10:22 PM CST, 4 hours 42 minutes before
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Hazardous weather outlook, Jan 9, 4:48 AM CST, 22 hours 16 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
448 AM CST FRI JAN 9 2009

IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-101100-
BUCHANAN-DELAWARE-DUBUQUE-BENTON-LINN-JONES-JACKSON-IOWA-JOHNSON-
CEDAR-CLINTON-MUSCATINE-SCOTT-KEOKUK-WASHINGTON-LOUISA-JEFFERSON-
HENRY IA-DES MOINES-VAN BUREN-LEE-JO DAVIESS-STEPHENSON-CARROLL-
WHITESIDE-ROCK ISLAND-HENRY IL-BUREAU-PUTNAM-MERCER-HENDERSON-
WARREN-HANCOCK-MCDONOUGH-SCOTLAND-CLARK-
448 AM CST FRI JAN 9 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

SNOW WILL REDEVELOP OVER THE AREA FROM MID TO LATE AFTERNOON AND
CONTINUE OVERNIGHT. THE SNOW MAY BE MIXED WITH FREEZING DRIZZLE OR
SLEET IN THE AFTERNOON AND EARLY EVENING. SNOW ACCUMULATIONS FROM
1 TO 3 INCHES ARE EXPECTED WITH SOME DRIFTING SNOW OVERNIGHT AS
NORTH WINDS INCREASE. A WINTER WEATHER ADVISORY REMAINS IN EFFECT FOR
NORTHERN PORTIONS OF THE OUTLOOK AREA. MORE DETAILED AND UPDATED
INFORMATION CAN BE FOUND IN THE LATEST WINTER WEATHER PRODUCT.

MINOR FLOODING IS ONGOING ON THE ROCK RIVER IN NORTHWEST ILLINOIS.
THE FLOODING MAY BE COMPOUNDED BY ICE ACTION ON CERTAIN PORTIONS OF
THE RIVER. SEE THE LATEST FLOOD STATEMENT FOR UPDATED INFORMATION.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

SEVERAL CHANCES FOR ACCUMULATING SNOW WILL BE FOUND OVER THE AREA
DURING THE UPCOMING WEEK...ESPECIALLY MONDAY THROUGH TUESDAY
NIGHT. IT IS TOO EARLY TO DETERMINE SNOW AMOUNTS. EXTREMELY COLD
ARCTIC AIR IS EXPECTED TO SPREAD ACROSS THE MIDWEST EARLY THIS
UPCOMING WEEK. DANGEROUS WIND CHILLS AND HAZARDOUS TRAVEL IN SNOW
AND BLOWING SNOW MAY ACCOMPANY THE COLD CONDITIONS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT. HOWEVER...
ANY SNOWFALL REPORTS WILL BE GREATLY APPRECIATED.

SHEETS/ERVIN

In the hours before

Local storm report, Jan 9, 9:46 PM CST, 5 hours 18 minutes before
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Local storm report, Jan 9, 9:56 PM CST, 5 hours 8 minutes before
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Local storm report, Jan 9, 10:55 PM CST, 4 hours 9 minutes before
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Local storm report, Jan 10, 12:58 AM CST, 2 hours 6 minutes before
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Local storm report, Jan 10, 2:12 AM CST, 52 minutes before
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Local storm report, Jan 10, 2:17 AM CST, 47 minutes before
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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.