Alert archive / Iowa / Special Weather Statements in 2014

Special Weather Statement, NWS La Crosse, WI

June 29, 2014Floyd County, Mitchell County, Iowa

NWS La Crosse, WI issued this special weather statement at Jun 29, 2014, 9:01 AM CDT for Floyd County, Mitchell County, Iowa. It was in force for 59 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jun 29, 2014, 9:01 AM CDT (14:01 UTC)
Expired: Jun 29, 2014, 10:00 AM CDT
In force: 59 min
Issued by: NWS La Crosse, WI

Counties Floyd County, IA, Mitchell County, IA

The radar

The La Crosse radar (KARX), 150 km from the middle of the area, began a volume at 14:02 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, 2.0 hours before the alert went out and 194 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 4 J/kg
Mixed-layer CIN: -215 J/kg
Mixed-layer LCL: 1253 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 140 m²/s²
0-3 km storm-relative helicity: 201 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.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS La Crosse, WI wrote its last area forecast discussion before this special weather statement went out at Jun 29, 6:48 AM CDT, 2 hours 13 minutes earlier.

Area forecast discussion, Jun 29, 6:48 AM CDT, 2 hours 13 minutes before

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Hazardous weather outlook, Jun 29, 4:13 AM CDT, 4 hours 48 minutes before

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In the hours before

Special weather statement, Jun 29, 9:01 AM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
901 AM CDT SUN JUN 29 2014

IAZ008-018-291500-
FLOYD-MITCHELL-
901 AM CDT SUN JUN 29 2014

...STRONG THUNDERSTORMS WILL AFFECT FLOYD AND MITCHELL COUNTIES...

AT 854 AM CDT...RADAR INDICATED A CLUSTER OF STRONG THUNDERSTORMS
WITH THE LEADING EDGE ABOUT 9 MILES NORTHWEST OF BRITT...OR 13 MILES
WEST OF FOREST CITY...MOVING EAST AROUND 50 MPH. PLAN ON THESE
STORMS IMPACTING THE AREA BY 930 AM.

WINDS IN EXCESS OF 40 MPH AND DIME SIZE HAIL ARE POSSIBLE WITH THESE
STORMS.

LOCATIONS LIKELY TO BE IMPACTED INCLUDE... CHARLES
CITY...OSAGE...NASHUA...NORA SPRINGS...ST. ANSGAR...
ROCKFORD...RUDD...FLOYD...MARBLE ROCK...MITCHELL...COLWELL...
ORCHARD...HOWARDVILLE...FLOYD CROSSING...ROCK CREEK...COLWELL COUNTY
PARK...AND NEW HAVEN.

THESE STORMS ARE ASLO CAPABLE OF TORRENTIAL RAINFALL...AND MAY CAUSE
SOME LOCALIZED FLOODING. REMEMBER...NEVER DRIVE YOUR VEHICLE THROUGH
FLOODED ROADWAYS.

FREQUENT CLOUD TO GROUND LIGHTNING IS ALSO OCCURRING WITH THESE
STORMS. LIGHTNING CAN STRIKE UP TO 15 MILES AWAY FROM A
THUNDERSTORM. SEEK A SAFE SHELTER INSIDE A BUILDING OR VEHICLE.

LAT...LON 4337 9303 4341 9257 4291 9255 4291 9302
TIME...MOT...LOC 1354Z 269DEG 48KT 4322 9390

DAS

The office that day

Everything else NWS La Crosse, WI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 28, 7:37 PM CDT	Special Weather Statement	ARX	Crawford, Grant, Richland	53 min
Jun 28, 8:11 PM CDT	Special Weather Statement	ARX	La Crosse, Trempealeau	79 min
Jun 28, 8:46 PM CDT	Areal Flood Advisory	ARX	Buffalo	3 hr
Jun 28, 8:50 PM CDT	Severe Thunderstorm Warning	ARX	Jackson, La Crosse, Monroe, Trempealeau	40 min
Jun 28, 9:24 PM CDT	Areal Flood Advisory	ARX	La Crosse	51 min
Jun 29, 2:25 PM CDT	Special Weather Statement	ARX	La Crosse	35 min
Jun 28, 7:06 PM CDT	Special Weather Statement	ARX	Chickasaw, Fayette, Howard, Winneshiek	69 min
Jun 29, 10:43 AM CDT	Special Weather Statement	ARX	Howard, Mitchell	47 min
Jun 29, 11:19 AM CDT	Special Weather Statement	ARX	Fillmore, Houston	41 min

Nearby

Special Weather Statements in Iowa, 2014 Every special weather statement in 2014

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.