Alert archive / Minnesota / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 97, NWS Twin Cities, MN

July 17, 2015Chippewa County, Renville County, Yellow Medicine County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 17, 2015, 10:17 PM CDT for Chippewa County, Renville County, Yellow Medicine County, Minnesota. It was in force for 28 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Jul 17, 2015, 10:17 PM CDT (03:17 UTC)
Expired
Jul 17, 2015, 10:45 PM CDT
In force
28 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Hail
1.0 in
Wind
70.0 mph

Counties Chippewa County, MN, Renville County, MN, Yellow Medicine County, MN

The radar

The Sioux Falls radar (KFSD), 149 km from the middle of the area, began a volume at 03:20 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.

What was reported inside it

TimeReportWhereRemark
Jul 17, 10:50 PM CDTTSTM WND GST 58Granite Falls, MN
Jul 17, 10:52 PM CDTTSTM WND GST 58Granite Falls, MN

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jul 17, 8:39 PM CDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 3.3 hours before the alert went out and 179 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 2015-07-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 888 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 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 2015-07-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 29 square meters per square second.193958Sfc1 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
888 J/kg
Mixed-layer CIN
-162 J/kg
Mixed-layer LCL
1752 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
29 m²/s²
0-3 km storm-relative helicity
104 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

908 
WUUS53 KMPX 180317
SVRMPX
MNC023-129-173-180345-
/O.NEW.KMPX.SV.W.0097.150718T0317Z-150718T0345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1017 PM CDT FRI JUL 17 2015

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  YELLOW MEDICINE COUNTY IN WEST CENTRAL MINNESOTA...
  SOUTHEASTERN CHIPPEWA COUNTY IN WEST CENTRAL MINNESOTA...
  NORTHWESTERN RENVILLE COUNTY IN CENTRAL MINNESOTA...

* UNTIL 1045 PM CDT

* AT 1017 PM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM MONTEVIDEO TO NEAR CLARKFIELD TO CANBY...MOVING
  SOUTHEAST AT 35 MPH.

  HAZARD...70 MPH WIND GUSTS AND QUARTER SIZE HAIL. 

  SOURCE...RADAR INDICATED. 

  IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT CONSIDERABLE 
           TREE DAMAGE. WIND DAMAGE IS ALSO LIKELY TO MOBILE 
           HOMES...ROOFS AND OUTBUILDINGS. 

* SEVERE THUNDERSTORMS WILL BE NEAR...
  CLARKFIELD AROUND 1025 PM CDT.
  GRANITE FALLS AND MAYNARD AROUND 1035 PM CDT.
  HANLEY FALLS AROUND 1040 PM CDT.
  SACRED HEART AND WOOD LAKE AROUND 1045 PM CDT.

OTHER LOCATIONS IMPACTED BY THESE SEVERE THUNDERSTORMS INCLUDE
MINNESOTA FALLS...HAZEL RUN...SPELLMAN LAKE...ST. LEO...SPRING
CREEK...GRANITE FALLS AIRPORT AND BURR.

THIS INCLUDES THE FOLLOWING HIGHWAYS...
 U.S. HIGHWAY 212 BETWEEN MILE MARKERS 37 AND 63.
 U.S. HIGHWAY 59 BETWEEN MILE MARKERS 87 AND 104.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4481 9613 4481 9585 4488 9585 4489 9575
      4493 9573 4489 9514 4468 9539 4462 9561
      4463 9563 4463 9623 4473 9644 4474 9644
TIME...MOT...LOC 0317Z 296DEG 29KT 4492 9570 4482 9583 4474 9629 

HAIL...1.00IN
WIND...70MPH
 
$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 17, 8:48 PM CDTSevere Thunderstorm WarningMPXChippewa, Lac qui Parle, Swift, Yellow Medicine57 min
Jul 17, 8:57 PM CDTSevere Thunderstorm WarningMPXStevens, Swift63 min
Jul 17, 9:28 PM CDTSevere Thunderstorm WarningMPXChippewa, Pope, Stevens, Swift47 min
Jul 17, 9:44 PM CDTSevere Thunderstorm WarningMPXChippewa, Kandiyohi, Lac qui Parle, Swift61 min
Jul 17, 10:30 PM CDTSevere Thunderstorm WarningMPXChippewa, Kandiyohi, Meeker, Stearns45 min
Jul 17, 10:41 PM CDTSevere Thunderstorm WarningMPXRedwood, Renville, Yellow Medicine34 min
Jul 17, 11:03 PM CDTSevere Thunderstorm WarningMPXBrown, McLeod, Nicollet, Redwood, Renville, Sibley42 min
Jul 17, 11:09 PM CDTSevere Thunderstorm WarningMPXMcLeod, Meeker, Stearns, Wright51 min
Jul 17, 11:44 PM CDTSevere Thunderstorm WarningMPXBrown, Carver, Le Sueur, McLeod, Nicollet, Scott and 1 more46 min
Jul 17, 11:52 PM CDTSevere Thunderstorm WarningMPXHennepin, Sherburne, Wright38 min
Jul 18, 12:01 AM CDTTornado WarningMPXCarver, Hennepin, Wright29 min
Jul 18, 12:26 AM CDTSevere Thunderstorm WarningMPXAnoka, Dakota, Hennepin, Ramsey, Sherburne, Washington and 1 more49 min
Jul 18, 12:29 AM CDTSevere Thunderstorm WarningMPXDakota, Le Sueur, Rice, Scott31 min
Jul 18, 12:55 AM CDTSevere Thunderstorm WarningMPXDakota, Goodhue, Rice, Steele, Waseca, Washington50 min
Jul 18, 1:06 AM CDTSevere Thunderstorm WarningMPXChisago, Washington39 min
Jul 18, 1:25 AM CDTSevere Thunderstorm WarningMPXChippewa, Kandiyohi, Renville, Yellow Medicine34 min
Jul 18, 1:27 AM CDTSevere Thunderstorm WarningMPXGoodhue48 min
Jul 18, 1:42 AM CDTSpecial Weather StatementMPXAnoka, Dakota, Hennepin, Ramsey63 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2015Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.