Alert archive / Iowa / Special Weather Statements in 2016

Special Weather Statement, NWS La Crosse, WI

May 25, 20164 counties in Iowa

NWS La Crosse, WI issued this special weather statement at May 25, 2016, 11:49 AM CDT for 4 counties in Iowa. It was in force for 26 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: May 25, 2016, 11:49 AM CDT (16:49 UTC)
Expired: May 25, 2016, 12:15 PM CDT
In force: 26 min
Issued by: NWS La Crosse, WI

Counties Chickasaw County, IA, Fayette County, IA, Howard County, IA, Winneshiek County, IA

The radar

The La Crosse radar (KARX), 99 km from the middle of the area, began a volume at 16:49 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, 4.8 hours before the alert went out and 210 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: 31 J/kg
Mixed-layer CIN: -227 J/kg
Mixed-layer LCL: 1220 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: -15 m²/s²
0-3 km storm-relative helicity: 60 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 May 25, 6:18 AM CDT, 5 hours 31 minutes earlier.

Area forecast discussion, May 25, 6:18 AM CDT, 5 hours 31 minutes before

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Hazardous weather outlook, May 25, 4:27 AM CDT, 7 hours 22 minutes before

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In the hours before

Special weather statement, May 25, 11:49 AM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
1149 AM CDT WED MAY 25 2016

IAZ009>011-019-029-030-MNZ094>096-251715-
CHICKASAW-FAYETTE-ALLAMAKEE-WINNESHIEK-HOWARD-CLAYTON-HOUSTON-MOWER-
FILLMORE-
1149 AM CDT WED MAY 25 2016

...STRONG THUNDERSTORMS WILL AFFECT NORTHWESTERN CLAYTON...
FAYETTE...EASTERN CHICKASAW...HOWARD...WESTERN ALLAMAKEE...
WINNESHIEK...SOUTHEASTERN MOWER...SOUTHERN FILLMORE AND SOUTHWESTERN
HOUSTON COUNTIES...

AT 1145 AM CDT...A COUPLE CLUSTERS OF STRONG THUNDERSTORM WAS
MOVING NORTHEAST ACROSS NORTHEAST IOWA...MOVING NORTHEAST AT 20 MPH.

WINDS IN EXCESS OF 30 MPH AND HALF INCH HAIL ARE POSSIBLE WITH THESE
STORMS.

LOCATIONS IMPACTED INCLUDE...
DECORAH...CRESCO...NEW HAMPTON...WEST UNION...PRESTON...ELKADER...
POSTVILLE...FAYETTE...SPRING GROVE...HARMONY...CALMAR...FREDERICKSBURG...
OSSIAN...MABEL...ELGIN...CLERMONT...MAYNARD...LIME SPRINGS...HAWKEYE AND
LAWLER.

FREQUENT CLOUD TO GROUND LIGHTNING IS ALSO LIKELY WITH THESE STORMS.
REMEMBER...LIGHTNING CAN STRIKE 10 MILES AWAY FROM A THUNDERSTORM.
SEEK A SAFE SHELTER INSIDE A BUILDING OR VEHICLE.

LAT...LON 4290 9208 4291 9226 4336 9248 4367 9251
      4366 9163 4343 9157 4278 9133 4273 9208
TIME...MOT...LOC 1645Z 210DEG 16KT 4310 9183

DAS

The office that day

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

Issued	Product	Office	Counties	Lasted
May 25, 1:16 PM CDT	Severe Thunderstorm Warning	ARX	Crawford, Vernon	30 min
May 25, 2:11 PM CDT	Special Weather Statement	ARX	Richland	34 min
May 25, 2:14 PM CDT	Severe Thunderstorm Warning	ARX	Richland, Vernon	46 min
May 25, 2:51 PM CDT	Special Weather Statement	ARX	Juneau	24 min
May 25, 3:00 PM CDT	Severe Thunderstorm Warning	ARX	Juneau	30 min
May 25, 3:08 PM CDT	Special Weather Statement	ARX	Adams, Juneau	22 min
May 25, 3:09 PM CDT	Severe Thunderstorm Warning	ARX	Adams	36 min
May 25, 3:26 PM CDT	Severe Thunderstorm Warning	ARX	Adams, Juneau	49 min
May 25, 3:34 PM CDT	Special Weather Statement	ARX	Adams, Juneau	41 min
May 25, 4:22 PM CDT	Special Weather Statement	ARX	Taylor	38 min
May 25, 4:26 PM CDT	Severe Thunderstorm Warning	ARX	Clark	49 min
May 25, 4:43 PM CDT	Special Weather Statement	ARX	Trempealeau	32 min
May 25, 5:14 PM CDT	Special Weather Statement	ARX	Jackson	31 min
May 25, 5:40 PM CDT	Special Weather Statement	ARX	Adams	35 min
May 25, 5:53 PM CDT	Special Weather Statement	ARX	Clark	37 min
May 25, 6:17 PM CDT	Special Weather Statement	ARX	Clark	28 min
May 25, 6:42 PM CDT	Special Weather Statement	ARX	Adams	33 min
May 25, 12:16 PM CDT	Special Weather Statement	ARX	Allamakee	59 min

Nearby

Special Weather Statements in Iowa, 2016 Every 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.