Alert archive / Iowa / Special Weather Statements in 2016

Special Weather Statement, NWS La Crosse, WI

June 20, 2016Floyd County, Iowa

NWS La Crosse, WI issued this special weather statement at Jun 20, 2016, 4:20 AM CDT for Floyd County, Iowa. It was in force for 25 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 20, 2016, 4:20 AM CDT (09:20 UTC)
Expired
Jun 20, 2016, 4:45 AM CDT
In force
25 min
Issued by
NWS La Crosse, WI

County Floyd County, IA

The radar

The La Crosse radar (KARX), 156 km from the middle of the area, began a volume at 09:22 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

Minneapolis, MN (KMPX), launched 00:00Z, 9.3 hours before the alert went out and 216 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 00:00Z on 2016-06-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 616 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 00:00Z on 2016-06-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 216 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
616 J/kg
Mixed-layer CIN
-295 J/kg
Mixed-layer LCL
1984 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
216 m²/s²
0-3 km storm-relative helicity
396 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

As transmitted.

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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 20, 2:00 AM CDT, 2 hours 20 minutes earlier.

Area forecast discussion, Jun 20, 2:00 AM CDT, 2 hours 20 minutes before
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Hazardous weather outlook, Jun 19, 4:26 AM CDT, 23 hours 54 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LA CROSSE WI
426 AM CDT SUN JUN 19 2016

IAZ008>011-018-019-029-030-MNZ079-086>088-094>096-WIZ017-029-
032>034-041>044-053>055-061-201100-
MITCHELL-HOWARD-WINNESHIEK-ALLAMAKEE-FLOYD-CHICKASAW-FAYETTE-
CLAYTON-WABASHA-DODGE-OLMSTED-WINONA-MOWER-FILLMORE-HOUSTON-
TAYLOR-CLARK-BUFFALO-TREMPEALEAU-JACKSON-LA CROSSE-MONROE-JUNEAU-
ADAMS-VERNON-CRAWFORD-RICHLAND-GRANT-
426 AM CDT SUN JUN 19 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHEAST
IOWA...SOUTHEAST MINNESOTA...AND SOUTHWEST INTO CENTRAL
WISCONSIN.

.DAY ONE...TODAY AND TONIGHT

THERE IS A CHANCE FOR THUNDERSTORMS LATE TONIGHT. A FEW STRONGER
TO ISOLATED SEVERE STORMS ARE POSSIBLE...MOSTLY ACROSS SOUTHEAST
MINNESOTA INTO NORTH-CENTRAL WISCONSIN. STRONG WINDS AND HAIL
WOULD BE THE MAIN THREATS.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

THUNDERSTORM CHANCES RETURN FOR TUESDAY NIGHT INTO THURSDAY...AND
AGAIN SATURDAY.

.SPOTTER INFORMATION STATEMENT...

GIVEN THE TIME OF NIGHT AND LOW RISK OF SEVERE WEATHER...SPOTTER
ACTIVATION IS NOT ANTICIPATED TONIGHT.

.EMERGENCY MANAGEMENT COORDINATION...

NO WEBINAR IS SCHEDULED.

RIECK

In the hours before

Special weather statement, Jun 20, 12:46 AM CDT, 3 hours 34 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
1246 AM CDT MON JUN 20 2016

MNZ079-086>088-094-095-WIZ017-029-032>034-200715-
WINONA-DODGE-WABASHA-MOWER-FILLMORE-OLMSTED-TREMPEALEAU-TAYLOR-CLARK-
BUFFALO-JACKSON-
1246 AM CDT MON JUN 20 2016

...A FEW STRONG THUNDERSTORMS COULD IMPACT SOUTHEAST MINNESOTA
INTO NORTH CENTRAL WISCONSIN EARLY THIS MORNING...

CLUSTERS OF THUNDERSTORMS WERE MOVING ACROSS SOUTHERN MINNESOTA AND
NORTHWEST WISCONSIN EARLY THIS MORNING. SOME OF THE STRONGER STORMS
HAVE BEEN PRODUCING WIND GUSTS OF 40 TO 45 MPH ALONG WITH HAIL AND
FREQUENT LIGHTNING.

WHILE SEVERE WEATHER IS NOT EXPECTED...BE ALERT FOR THESE WIND GUSTS
AND THE LIGHTNING THREAT...ESPECIALLY IF YOU ARE CAMPING OVERNIGHT.

A ROUND OF HEAVY RAIN WILL ALSO ACCOMPANY THE STORMS AS THEY MOVE
THROUGH.

LAT...LON 4538 9004 4512 9004 4503 9031 4415 9032
      4407 9131 4398 9142 4385 9129 4384 9173
      4350 9173 4350 9305 4420 9304 4419 9255
      4437 9255 4437 9243 4445 9243 4441 9208
      4460 9200 4460 9092 4538 9092
TIME...MOT...LOC 0543Z 240DEG 49KT 4404 9250

SHEA
Local storm report, Jun 20, 1:19 AM CDT, 3 hours 1 minute before
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Special weather statement, Jun 20, 1:53 AM CDT, 2 hours 27 minutes before
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Special weather statement, Jun 20, 4:20 AM CDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jun 20, 12:46 AM CDTSpecial Weather StatementARXBuffalo, Clark, Jackson, Taylor, Trempealeau89 min
Jun 20, 1:53 AM CDTSpecial Weather StatementARXBuffalo, Clark, Jackson, La Crosse, Monroe, Taylor and 1 more82 min

Nearby

Special Weather Statements in Iowa, 2016Every special weather statement in 2016

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.