Alert archive / Minnesota / Special Weather Statements in 2018

Special Weather Statement, NWS Twin Cities, MN

May 23, 2018Martin County, Watonwan County, Minnesota

NWS Twin Cities, MN issued this special weather statement at May 23, 2018, 3:22 AM CDT for Martin County, Watonwan County, Minnesota. It was in force for 113 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 23, 2018, 3:22 AM CDT (08:22 UTC)
Expired: May 23, 2018, 5:15 AM CDT
In force: 113 min
Issued by: NWS Twin Cities, MN

Counties Martin County, MN, Watonwan County, MN

The radar

The Minneapolis radar (KMPX), 146 km from the middle of the area, began a volume at 08:26 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, 8.4 hours before the alert went out and 144 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: 1364 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 53 m²/s²
0-3 km storm-relative helicity: 107 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 Twin Cities, MN wrote its last area forecast discussion before this special weather statement went out at May 22, 11:00 PM CDT, 4 hours 22 minutes earlier.

Area forecast discussion, May 22, 11:00 PM CDT, 4 hours 22 minutes before

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Hazardous weather outlook, May 22, 9:20 PM CDT, 6 hours 2 minutes before

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In the hours before

Special weather statement, May 23, 3:22 AM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Twin Cities/Chanhassen MN
322 AM CDT WED MAY 23 2018

MNZ082-091-231015-
Watonwan-Martin-
322 AM CDT WED MAY 23 2018

...VERY HEAVY RAIN AND LOCALIZED MINOR FLOODING EXPECTED...

VERY HEAVY RAIN WITH THE POTENTIAL FOR LOCALIZED FLOODING WILL AFFECT
THE FOLLOWING COUNTIES...

Watonwan...Martin...

At 315 AM CDT...VERY HEAVY RAIN WITH THE POTENTIAL FOR LOCALIZED
FLOODING WAS over Fairmont, and other communities in Watonwan and
Martin counties. Thunderstorms continued to form in western Watonwan
and Martin counties since midnight. These storms were moving very
slowly to the southeast and producing rainfall rates of 1 to 2
inches per hour. Through 5 am, an additional one or two inches of
rainfall is possible in the same areas that have already received
heavy rainfall since midnight.

LOCATIONS IMPACTED INCLUDE...
Fairmont, St. James, Sherburn, Truman, Trimont, Iowa Lake and
Okamanpedan Lake.

This includes Interstate 90 between mile markers 82 and 109.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...AS WELL AS FARM AND COUNTRY ROADS. DO NOT
ATTEMPT TO TRAVEL ACROSS FLOODED ROADS. FIND ALTERNATE ROUTES.

TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE.

LAT...LON 4350 9485 4411 9485 4411 9438 4385 9437
      4350 9425
TIME...MOT...LOC 0817Z 180DEG 0KT 4398 9475

JLT

The office that day

Everything else NWS Twin Cities, MN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 23, 4:42 AM CDT	Areal Flood Warning	MPX	Martin	3 hr
May 23, 5:11 AM CDT	Special Weather Statement	MPX	Watonwan	2 hr

Nearby

Special Weather Statements in Minnesota, 2018 Every special weather statement in 2018

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.