Alert archive / Iowa / Winter Storm Watches in 2015

Winter Storm Watch 3, NWS Quad Cities, IA

November 19, 201516 counties in Iowa; 9 counties in Illinois

NWS Quad Cities, IA issued this winter storm watch at Nov 19, 2015, 4:11 AM CST for 16 counties in Iowa; 9 counties in Illinois. It took effect at Nov 20, 2015, 6:00 PM CST. It was in force for .

The area

The counties it named.

The facts

Issued
Nov 19, 2015, 4:11 AM CST (10:11 UTC)
In effect from
Nov 20, 2015, 6:00 PM CST
Expired
Nov 19, 2015, 3:32 PM CST
In force
Issued by
NWS Quad Cities, IA
All 25 counties

Benton County, IA, Buchanan County, IA, Cedar County, IA, Clinton County, IA, Delaware County, IA, Dubuque County, IA, Iowa County, IA, Jackson County, IA, Johnson County, IA, Jones County, IA, Keokuk County, IA, Linn County, IA, Louisa County, IA, Muscatine County, IA, Scott County, IA, Washington County, IA, Bureau County, IL, Carroll County, IL, Henry County, IL, Jo Daviess County, IL, Mercer County, IL, Putnam County, IL, Rock Island County, IL, Stephenson County, IL, Whiteside County, IL

The radar

The Quad Cities radar (KDVN), 32 km from the middle of the area, began a volume at 10:17 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, 10.2 hours before the alert went out and 37 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 2015-11-19Temperature 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 2015-11-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 203 square meters per square second.19395878Sfc1 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
892 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
203 m²/s²
0-3 km storm-relative helicity
224 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

Everything else NWS Quad Cities, IA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Nov 19, 3:36 AM CSTWind AdvisoryDVNBenton, Buchanan, Cedar, Clinton, Delaware, Dubuque and 7 more14 hr
Nov 19, 3:32 PM CSTWinter Storm WarningDVNBenton, Buchanan, Cedar, Clinton, Delaware, Dubuque and 10 more44 hr
Nov 19, 3:32 PM CSTWinter Weather AdvisoryDVNDes Moines, Henry, Jefferson, Lee, Van Buren44 hr

Nearby

Winter Storm Watches in Iowa, 2015Winter Storm Watches in Illinois, 2015Every winter storm watch in 2015

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.