Alert archive / Iowa / Wind Advisories in 2007

Wind Advisory 7, NWS Des Moines, IA

April 21, 200717 counties in Iowa

NWS Des Moines, IA issued this wind advisory at Apr 21, 2007, 11:18 AM CDT for 17 counties in Iowa. It took effect at Apr 21, 2007, 12:00 PM CDT. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued
Apr 21, 2007, 11:18 AM CDT (16:18 UTC)
In effect from
Apr 21, 2007, 12:00 PM CDT
Expired
Apr 21, 2007, 8:00 PM CDT
In force
8 hr
Issued by
NWS Des Moines, IA

Counties Audubon County, IA, Calhoun County, IA, Carroll County, IA, Cerro Gordo County, IA, Crawford County, IA, Emmet County, IA, Greene County, IA, Hancock County, IA, Humboldt County, IA, Kossuth County, IA, Palo Alto County, IA, Pocahontas County, IA, Sac County, IA, Webster County, IA, Winnebago County, IA, Worth County, IA, Wright County, IA

The radar

The Des Moines radar (KDMX), 118 km from the middle of the area, began a volume at 16:22 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

Omaha, NE (KOAX), launched 12:00Z, 4.3 hours before the alert went out and 227 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, Omaha, NE at 12:00Z on 2007-04-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 157 joules per kilogram.LCLLFCEL10008507005003002001001 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, Omaha, NE at 12:00Z on 2007-04-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 210 square meters per square second.193958Sfc1 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
157 J/kg
Mixed-layer CIN
-505 J/kg
Mixed-layer LCL
961 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
210 m²/s²
0-3 km storm-relative helicity
240 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.

000 
WWUS73 KDMX 211618
NPWDMX

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE DES MOINES IA
1118 AM CDT SAT APR 21 2007

...GUSTY SOUTHERLY WINDS CAN BE EXPECTED THIS AFTERNOON ACROSS
NORTH CENTRAL AND NORTHWEST IOWA...

.GUSTY SOUTH WINDS WILL CONTINUE TO INCREASE TODAY AS A RESULT OF
HIGH PRESSURE TO THE EAST AND STRENGTHENING LOW PRESSURE TO THE
WEST.

IAZ004>007-015>017-023>025-033>035-044>046-057-220030-
/O.NEW.KDMX.WI.Y.0007.070421T1700Z-070422T0100Z/
EMMET-KOSSUTH-WINNEBAGO-WORTH-PALO ALTO-HANCOCK-CERRO GORDO-
POCAHONTAS-HUMBOLDT-WRIGHT-SAC-CALHOUN-WEBSTER-CRAWFORD-CARROLL-
GREENE-AUDUBON-
INCLUDING THE CITIES OF...ESTHERVILLE...ALGONA...FOREST CITY...
NORTHWOOD...EMMETSBURG...GARNER...MASON CITY...POCAHONTAS...
HUMBOLDT...CLARION...SAC CITY...ROCKWELL CITY...FORT DODGE...
DENISON...CARROLL...JEFFERSON...AUDUBON
1118 AM CDT SAT APR 21 2007

...WIND ADVISORY IN EFFECT UNTIL 8 PM CDT THIS EVENING...

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A WIND
ADVISORY...WHICH IS IN EFFECT UNTIL 8 PM CDT THIS EVENING. 

SOUTH WINDS WILL INCREASE TO 25 TO 35 MPH THIS AFTERNOON. GUSTS TO
45 MPH ARE POSSIBLE AS WELL. EXPECT THE WINDS TO DIMINISH THIS
EVENING TOWARD SUNSET.

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

$$

DONAVON
1 follow-up statement
000 
WWUS73 KDMX 212041
NPWDMX

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE DES MOINES IA
341 PM CDT SAT APR 21 2007

...GUSTY SOUTHERLY WINDS CAN BE EXPECTED THIS AFTERNOON AND EARLY EVENING
ACROSS NORTH CENTRAL AND NORTHWEST IOWA...

.LOW PRESSURE STRENGTHENING OVER EASTERN COLORADO WILL RESULT IN
GUSTY SOUTH WINDS.

IAZ004>007-015>017-023>025-033>035-044>046-057-220100-
/O.CON.KDMX.WI.Y.0007.000000T0000Z-070422T0100Z/
EMMET-KOSSUTH-WINNEBAGO-WORTH-PALO ALTO-HANCOCK-CERRO GORDO-
POCAHONTAS-HUMBOLDT-WRIGHT-SAC-CALHOUN-WEBSTER-CRAWFORD-CARROLL-
GREENE-AUDUBON-
INCLUDING THE CITIES OF...ESTHERVILLE...ALGONA...FOREST CITY...
NORTHWOOD...EMMETSBURG...GARNER...MASON CITY...POCAHONTAS...
HUMBOLDT...CLARION...SAC CITY...ROCKWELL CITY...FORT DODGE...
DENISON...CARROLL...JEFFERSON...AUDUBON
341 PM CDT SAT APR 21 2007

...WIND ADVISORY REMAINS IN EFFECT UNTIL 8 PM CDT THIS EVENING...

SOUTH WINDS OF TO 25 TO 35 MPH WILL CONTINUE THIS AFTERNOON. A
FEW GUSTS TO 45 MPH CAN ALSO BE EXPECTED. THE WINDS WILL DIMINISH
THIS EVENING TOWARD SUNSET.

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

$$

DONAVON

Nearby

Wind Advisories in Iowa, 2007Every wind advisory in 2007

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.