Alert archive / Iowa / Winter Storm Watches in 2015
Winter Storm Watch 7, NWS Des Moines, IA
NWS Des Moines, IA issued this winter storm watch at Dec 26, 2015, 3:46 PM CST for 51 counties in Iowa. It took effect at Dec 28, 2015, 12:00 AM CST. It was in force for .
The area
The counties it named.
The facts
- Issued
- Dec 26, 2015, 3:46 PM CST (21:46 UTC)
- In effect from
- Dec 28, 2015, 12:00 AM CST
- Expired
- Dec 27, 2015, 3:12 PM CST
- In force
- Issued by
- NWS Des Moines, IA
All 51 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, Emmet 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, Kossuth County, IA, Lucas County, IA, Madison County, IA, Mahaska County, IA, Marion County, IA, Marshall County, IA, Monroe County, IA, Palo Alto County, IA, Pocahontas 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), 23 km from the middle of the area, began a volume at 21:52 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, 9.8 hours before the alert went out and 270 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
- 904 m above ground
- 0-6 km bulk shear
- 81 kt
- 0-1 km storm-relative helicity
- 623 m²/s²
- 0-3 km storm-relative helicity
- 753 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this winter storm watch 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 winter storm watch went out at Dec 26, 12:39 PM CST, 3 hours 7 minutes earlier.
Area forecast discussion, Dec 26, 12:39 PM CST, 3 hours 7 minutes before
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</html>Hazardous weather outlook, Dec 26, 5:42 AM CST, 10 hours 4 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DES MOINES IA 542 AM CST SAT DEC 26 2015 IAZ050-062-074-075-084>086-094>097-271145- TAMA-POWESHIEK-MARION-MAHASKA-LUCAS-MONROE-WAPELLO-DECATUR-WAYNE- APPANOOSE-DAVIS- 542 AM CST SAT DEC 26 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA. .DAY ONE...TODAY AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY A SIGNIFICANT WINTER STORM IS POSSIBLE MONDAY INTO MONDAY NIGHT. THIS STORM WILL PRODUCE A WINTRY MIX OF PRECIPITATION WITH SNOW AND ICE ACCUMULATIONS POSSIBLE. STRONG AND GUSTY WINDS IN COMBINATION WITH ICING ON TREES AND POWER LINES MAY CAUSE POWER OUTAGES. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED. IAZ004>007-015>017-024>028-036>039-271145- EMMET-KOSSUTH-WINNEBAGO-WORTH-PALO ALTO-HANCOCK-CERRO GORDO- HUMBOLDT-WRIGHT-FRANKLIN-BUTLER-BREMER-HAMILTON-HARDIN-GRUNDY- BLACK HAWK- 542 AM CST SAT DEC 26 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL IOWA. .DAY ONE...TODAY AND TONIGHT A WINTER WEATHER ADVISORY IS IN EFFECT FOR THE AREA. PLEASE REFER TO THE NATIONAL WEATHER SERVICE WEBSITE AT WEATHER.GOV/DESMOINES FOR FURTHER DETAILS. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY A SIGNIFICANT WINTER STORM IS POSSIBLE MONDAY INTO MONDAY NIGHT. THIS STORM WILL HAVE THE POTENTIAL TO PRODUCE MODERATE TO HEAVY SNOWFALL. IN ADDITION...A WINTRY MIX MAY OCCUR FOR A PERIOD WITH FREEZING RAIN AND SLEET POSSIBLE. STRONG AND GUSTY WINDS MAY PRODUCE AREAS OF BLOWING AND DRIFTING OF SNOW. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED BUT REPORTS OF SNOWFALL AND ICE ACCRUAL WOULD BE APPRECIATED. IAZ023-033>035-044>049-057>061-070>073-081>083-092-093-271145- POCAHONTAS-SAC-CALHOUN-WEBSTER-CRAWFORD-CARROLL-GREENE-BOONE- STORY-MARSHALL-AUDUBON-GUTHRIE-DALLAS-POLK-JASPER-CASS-ADAIR- MADISON-WARREN-ADAMS-UNION-CLARKE-TAYLOR-RINGGOLD- 542 AM CST SAT DEC 26 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA. .DAY ONE...TODAY AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY A SIGNIFICANT WINTER STORM IS POSSIBLE MONDAY INTO MONDAY NIGHT. THIS STORM WILL HAVE THE POTENTIAL TO PRODUCE MODERATE TO HEAVY SNOWFALL. IN ADDITION...A WINTRY MIX MAY OCCUR FOR A PERIOD WITH FREEZING RAIN AND SLEET POSSIBLE. IN ADDITIONAL...STRONG AND GUSTY WINDS MAY CAUSE BLOWING SNOW IN ADDITION TO LOCAL POWER OUTAGES WHERE ICING ON TREES AND POWER LINES OCCURS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY.
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 25, 6:49 PM CST | River Flood Warning | DMX | Mahaska, Wapello | 8 days |
| Dec 26, 9:43 AM CST | River Flood Warning | DMX | Davis, Wapello | 4 days |
Nearby
Winter Storm Watches in Iowa, 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.