Alert archive / Iowa / Wind Advisories in 2012

Wind Advisory 14, NWS Des Moines, IA

December 9, 20129 counties in Iowa

NWS Des Moines, IA issued this wind advisory at Dec 9, 2012, 3:28 PM CST for 9 counties in Iowa. It was in force for 9 hr.

The area

The counties it named.

The facts

Issued
Dec 9, 2012, 3:28 PM CST (21:28 UTC)
Expired
Dec 10, 2012, 12:00 AM CST
In force
9 hr
Issued by
NWS Des Moines, IA

Counties Calhoun County, IA, Emmet County, IA, Hancock County, IA, Humboldt County, IA, Kossuth County, IA, Palo Alto County, IA, Pocahontas County, IA, Sac County, IA, Winnebago County, IA

The radar

The Des Moines radar (KDMX), 145 km from the middle of the area, began a volume at 21:29 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

Minneapolis, MN (KMPX), launched 12:00Z, 9.5 hours before the alert went out and 223 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, Minneapolis, MN at 12:00Z on 2012-12-09Temperature 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°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 12:00Z on 2012-12-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 285 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
611 m above ground
0-6 km bulk shear
78 kt
0-1 km storm-relative helicity
285 m²/s²
0-3 km storm-relative helicity
275 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

274 
WWUS73 KDMX 092128
NPWDMX

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE DES MOINES IA
328 PM CST SUN DEC 9 2012

...GUSTY NORTHWEST WINDS TO IMPACT THE AREA TONIGHT...

.A SECONDARY COLD FRONT WILL MOVE INTO IOWA LATE THIS AFTERNOON
INTO THIS EVENING AND WILL BRING STRONG AND GUSTY WINDS TO
PORTIONS OF NORTH CENTRAL AND NORTHWEST IOWA.

IAZ004>006-015-016-023-024-033-034-100530-
/O.NEW.KDMX.WI.Y.0014.121209T2128Z-121210T0600Z/
EMMET-KOSSUTH-WINNEBAGO-PALO ALTO-HANCOCK-POCAHONTAS-HUMBOLDT-SAC-
CALHOUN-
INCLUDING THE CITIES OF...ESTHERVILLE...ALGONA...FOREST CITY...
EMMETSBURG...GARNER...POCAHONTAS...HUMBOLDT...SAC CITY...
ROCKWELL CITY
328 PM CST SUN DEC 9 2012

...WIND ADVISORY IN EFFECT UNTIL MIDNIGHT CST TONIGHT...

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A WIND
ADVISORY...WHICH IS IN EFFECT UNTIL MIDNIGHT CST TONIGHT. 

* TIMING...THROUGH THIS EVENING WITH THE STRONGEST WINDS EXPECTED
  BETWEEN 6 PM AND MIDNIGHT.

* WINDS...NORTHWEST WINDS OF 25 TO 35 MPH GUSTING TO 45 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND ADVISORY MEANS THAT WINDS OF 30 MPH ARE EXPECTED. WINDS
THIS STRONG CAN MAKE DRIVING DIFFICULT...ESPECIALLY FOR HIGH
PROFILE VEHICLES. USE EXTRA CAUTION.

&&

$$
2 follow-up statements
056 
WWUS73 KDMX 100302
NPWDMX

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE DES MOINES IA
902 PM CST SUN DEC 9 2012

...GUSTY NORTHWEST WINDS TO IMPACT THE AREA TONIGHT...

.A SECONDARY COLD FRONT WILL CONTINUE MOVING THROUGH NORTHWEST
IOWA TONIGHT KEEPING STRONG AND GUSTY WINDS ACROSS THE ADVISORY
AREA.

IAZ004>006-015-016-023-024-033-034-100600-
/O.CON.KDMX.WI.Y.0014.000000T0000Z-121210T0600Z/
EMMET-KOSSUTH-WINNEBAGO-PALO ALTO-HANCOCK-POCAHONTAS-HUMBOLDT-SAC-
CALHOUN-
INCLUDING THE CITIES OF...ESTHERVILLE...ALGONA...FOREST CITY...
EMMETSBURG...GARNER...POCAHONTAS...HUMBOLDT...SAC CITY...
ROCKWELL CITY
902 PM CST SUN DEC 9 2012

...WIND ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT CST TONIGHT...

* TIMING...STRONG GUSTY WINDS WILL PERSIST LATE THIS EVENING
  BEFORE GRADUALLY DIMINISHING SHORTLY AFTER MIDNIGHT.

* WINDS...NORTHWEST WINDS OF 25 TO 35 MPH GUSTING TO 40 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND ADVISORY MEANS THAT WINDS OF AT LEAST 30 MPH ARE EXPECTED.
WINDS THIS STRONG CAN MAKE DRIVING DIFFICULT...ESPECIALLY FOR HIGH
PROFILE VEHICLES. USE EXTRA CAUTION.

&&

$$

SMALL
717 
WWUS73 KDMX 100549
NPWDMX

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE DES MOINES IA
1149 PM CST SUN DEC 9 2012

IAZ004>006-015-016-023-024-033-034-100700-
/O.EXP.KDMX.WI.Y.0014.000000T0000Z-121210T0600Z/
EMMET-KOSSUTH-WINNEBAGO-PALO ALTO-HANCOCK-POCAHONTAS-HUMBOLDT-SAC-
CALHOUN-
INCLUDING THE CITIES OF...ESTHERVILLE...ALGONA...FOREST CITY...
EMMETSBURG...GARNER...POCAHONTAS...HUMBOLDT...SAC CITY...
ROCKWELL CITY
1149 PM CST SUN DEC 9 2012

...WIND ADVISORY WILL EXPIRE AT MIDNIGHT CST TONIGHT...

GUSTY NORTHWEST WINDS WILL CONTINUE OVERNIGHT BUT GRADUALLY
DIMINISH AND REMAIN BELOW ADVISORY CRITERIA. SUSTAINED SPEEDS
SHOULD MAINLY BE 25 MPH OR LESS WITH GUSTS LESS THAN 35 MPH.

$$

SMALL

The office that day

Everything else NWS Des Moines, IA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Dec 9, 5:31 PM CSTWinter Weather AdvisoryDMXBlack Hawk, Bremer, Butler, Cerro Gordo, Franklin, Grundy and 1 more3 hr

Nearby

Wind Advisories in Iowa, 2012Every wind advisory in 2012

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.