Alert archive / Iowa / Special Weather Statements in 2015

Special Weather Statement, NWS La Crosse, WI

July 24, 20154 counties in Iowa

NWS La Crosse, WI issued this special weather statement at Jul 24, 2015, 8:33 AM CDT for 4 counties in Iowa. It was in force for 72 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: Jul 24, 2015, 8:33 AM CDT (13:33 UTC)
Expired: Jul 24, 2015, 9:45 AM CDT
In force: 72 min
Issued by: NWS La Crosse, WI

Counties Chickasaw County, IA, Fayette County, IA, Floyd County, IA, Howard County, IA

The radar

The La Crosse radar (KARX), 130 km from the middle of the area, began a volume at 13:35 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, 1.6 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-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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1385 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 13 m²/s²
0-3 km storm-relative helicity: 81 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 Jul 24, 6:40 AM CDT, 1 hour 53 minutes earlier.

Area forecast discussion, Jul 24, 6:40 AM CDT, 1 hour 53 minutes before

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Hazardous weather outlook, Jul 24, 6:31 AM CDT, 2 hours 2 minutes before

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In the hours before

Special weather statement, Jul 24, 3:29 AM CDT, 5 hours 4 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
329 AM CDT FRI JUL 24 2015

MNZ079-086-087-094-095-241030-
DODGE-WABASHA-MOWER-FILLMORE-OLMSTED-
329 AM CDT FRI JUL 24 2015

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT MOWER...WESTERN
FILLMORE...WABASHA...DODGE AND OLMSTED COUNTIES...

AT 326 AM CDT...A LINE OF STRONG THUNDERSTORMS WAS ALONG A LINE
EXTENDING FROM STANTON TO NEAR BLOOMING PRAIRIE TO GLENVILLE...AND
MOVING EAST AT 40 MPH.

FREQUENT LIGHTNING AND WINDS UP TO 40 MPH ARE POSSIBLE WITH THESE
STORMS.

THESE STORMS WILL BE NEAR...

MANTORVILLE AND KASSON AROUND 345 AM CDT.
AUSTIN...LYLE...BYRON AND RAMSEY AROUND 350 AM CDT.
ROCHESTER...ROSE CREEK AND STEWARTVILLE AROUND 400 AM CDT.

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

LAT...LON 4420 9305 4419 9255 4437 9255 4437 9243
      4445 9243 4445 9224 4441 9210 4350 9211
      4350 9305
TIME...MOT...LOC 0826Z 268DEG 40KT 4447 9303 4393 9302 4357 9331

BOYNE

Special weather statement, Jul 24, 4:13 AM CDT, 4 hours 20 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
413 AM CDT FRI JUL 24 2015

MNZ086-087-094-095-241015-
DODGE-MOWER-FILLMORE-OLMSTED-
413 AM CDT FRI JUL 24 2015

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT MOWER...WESTERN
FILLMORE...SOUTHEASTERN DODGE AND OLMSTED COUNTIES...

AT 411 AM CDT...A LINE OF STRONG THUNDERSTORMS WAS ALONG A LINE
EXTENDING FROM NEAR KASSON TO NEAR LYLE...AND MOVING EAST AT 25 MPH.

WINDS UP TO 30 MPH ARE POSSIBLE WITH THESE STORMS.

THESE STORMS WILL BE NEAR...
  KASSON AROUND 415 AM CDT.
  BYRON AROUND 420 AM CDT.
  ADAMS AROUND 440 AM CDT.
  ROCHESTER AND STEWARTVILLE AROUND 445 AM CDT.

OTHER LOCATIONS IMPACTED BY THESE STORMS INCLUDE FILLMORE...MARION...
HIGH FOREST...PLEASANT GROVE AND WASHINGTON.

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

LAT...LON 4402 9276 4409 9208 4402 9208 4350 9233
      4350 9301
TIME...MOT...LOC 0911Z 269DEG 17KT 4396 9270 4354 9291

BOYNE

Special weather statement, Jul 24, 7:19 AM CDT, 1 hour 14 minutes before

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Special weather statement, Jul 24, 8:33 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.

Issued	Product	Office	Counties	Lasted
Jul 24, 3:29 AM CDT	Special Weather Statement	ARX	Dodge, Mower, Olmsted, Wabasha	2 hr
Jul 24, 4:13 AM CDT	Special Weather Statement	ARX	Mower, Olmsted	62 min
Jul 24, 7:47 AM CDT	Areal Flood Advisory	ARX	Mower	118 min

Nearby

Special Weather Statements in Iowa, 2015 Every special weather statement in 2015

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.