Alert archive / Minnesota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 67, NWS Twin Cities, MN

May 18, 2012Todd County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at May 18, 2012, 11:46 PM CDT for Todd County, Minnesota. It was in force for 23 min. 1 report 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
May 18, 2012, 11:46 PM CDT (04:46 UTC)
Expired
May 19, 2012, 12:09 AM CDT
In force
23 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Hail
1.0 in
Wind
65.0 mph

County Todd County, MN

The radar

The Minneapolis radar (KMPX), 162 km from the middle of the area, began a volume at 04:48 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
May 18, 11:50 PM CDTHAIL 15 N Sauk Centre, MNHAIL COVERING THE GROUND

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

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 4.8 hours before the alert went out and 160 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 2012-05-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 20 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 2012-05-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 9 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
20 J/kg
Mixed-layer CIN
-98 J/kg
Mixed-layer LCL
3382 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
9 m²/s²
0-3 km storm-relative helicity
63 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.

623 
WUUS53 KMPX 190446
SVRMPX
MNC153-190530-
/O.NEW.KMPX.SV.W.0067.120519T0446Z-120519T0530Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1146 PM CDT FRI MAY 18 2012

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL TODD COUNTY IN CENTRAL MINNESOTA...

* UNTIL 1230 AM CDT

* AT 1144 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF
  PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS OF 65 MPH. THIS
  STORM WAS LOCATED NEAR SAUK CENTRE...OR ABOUT 13 MILES SOUTH OF
  LONG PRAIRIE...AND MOVING NORTH AT 25 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  LONG PRAIRIE...
  LITTLE SAUK...
  CLOTHO...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR
DAMAGING WINDS IN EXCESS OF 60 MPH AND LARGE HAIL. SEEK SHELTER NOW
INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

THIS STORM STORM PRODUCED WINDS GUSTS TO 65 MPH AND HAIL TO GOLF BALL IN
SIZE IN SAUK CENTRE. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY
AWAY FROM WINDOWS!

&&

LAT...LON 4607 9475 4577 9480 4577 9507 4591 9508
      4609 9507
TIME...MOT...LOC 0446Z 184DEG 20KT 4581 9493
WIND...HAIL 65MPH 1.00IN

$$
1 follow-up statement
058 
WWUS53 KMPX 190509
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1209 AM CDT SAT MAY 19 2012

MNC153-190525-
/O.CAN.KMPX.SV.W.0067.000000T0000Z-120519T0530Z/
TODD MN-
1209 AM CDT SAT MAY 19 2012

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL TODD COUNTY IS
CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR
PROPERTY...HOWEVER GUSTY WINDS ARE STILL POSSIBLE WITH THIS
THUNDERSTORM.

LAT...LON 4607 9475 4577 9480 4577 9507 4591 9508
      4609 9507
TIME...MOT...LOC 0510Z 184DEG 20KT 4594 9492

$$

The office that day

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

IssuedProductOfficeCountiesLasted
May 18, 8:21 PM CDTSpecial Weather StatementMPXRedwood39 min
May 18, 9:34 PM CDTSpecial Weather StatementMPXKandiyohi41 min
May 18, 9:45 PM CDTSevere Thunderstorm WarningMPXKandiyohi45 min
May 18, 10:48 PM CDTSevere Thunderstorm WarningMPXStearns27 min
May 18, 11:13 PM CDTSevere Thunderstorm WarningMPXStearns, Todd47 min
May 19, 4:38 PM CDTSevere Thunderstorm WarningMPXRenville32 min
May 19, 5:17 PM CDTSevere Thunderstorm WarningMPXMcLeod, Renville, Sibley58 min
May 19, 5:53 PM CDTSevere Thunderstorm WarningMPXCarver, Hennepin, Wright52 min
May 19, 6:17 PM CDTSevere Thunderstorm WarningMPXAnoka, Hennepin43 min
May 19, 6:33 PM CDTSevere Thunderstorm WarningMPXHennepin, Sherburne27 min
May 19, 6:36 PM CDTSevere Thunderstorm WarningMPXAnoka, Chisago, Dakota, Hennepin, Ramsey, Washington54 min
May 19, 6:54 PM CDTSevere Thunderstorm WarningMPXAnoka, Hennepin, Isanti38 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2012Every severe thunderstorm warning in 2012

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.