Alert archive / Minnesota / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 69, NWS Twin Cities, MN

July 21, 2014Benton County, Morrison County, Stearns County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 21, 2014, 11:36 PM CDT for Benton County, Morrison County, Stearns County, Minnesota. It was in force for 39 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 21, 2014, 11:36 PM CDT (04:36 UTC)
Expired
Jul 22, 2014, 12:15 AM CDT
In force
39 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Benton County, MN, Morrison County, MN, Stearns County, MN

The radar

The Minneapolis radar (KMPX), 150 km from the middle of the area, began a volume at 04:38 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 watch it was issued in

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

IssuedProductOfficeLasted
Jul 21, 9:24 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 4.6 hours before the alert went out and 149 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 2014-07-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3298 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 2014-07-22The 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
3298 J/kg
Mixed-layer CIN
-73 J/kg
Mixed-layer LCL
1091 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
29 m²/s²
0-3 km storm-relative helicity
133 m²/s²
Significant tornado parameter
0.6
Supercell composite
5.7

Open this sounding in Storm Lab

The text

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

738 
WUUS53 KMPX 220436
SVRMPX
MNC009-097-145-220515-
/O.NEW.KMPX.SV.W.0069.140722T0436Z-140722T0515Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1136 PM CDT MON JUL 21 2014

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN BENTON COUNTY IN CENTRAL MINNESOTA...
  MORRISON COUNTY IN CENTRAL MINNESOTA...
  NORTHERN STEARNS COUNTY IN CENTRAL MINNESOTA...

* UNTIL 1215 AM CDT

* AT 1136 PM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM 14 MILES NORTHWEST OF CAMP RIPLEY TO 13 MILES
  SOUTHEAST OF LONG PRAIRIE TO 10 MILES SOUTHEAST OF SAUK CENTRE...
  AND MOVING EAST AT 50 MPH.

  HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL.

  SOURCE...LAW ENFORCEMENT.

  IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE TO
           ROOFS...SIDING AND TREES.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  CAMP RIPLEY AND LITTLE FALLS AROUND 1150 PM CDT.

OTHER LOCATIONS IN THE WARNING INCLUDE UPSALA...SOBIESKI...ELMDALE...
FARMING...LITTLE FALLS AIRPORT...HOLDINGFORD...BOWLUS...AVON...OPOLE
AND ROYALTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4635 9465 4631 9455 4634 9443 4630 9435
      4627 9433 4623 9438 4616 9436 4616 9400
      4579 9411 4564 9423 4554 9440 4556 9497
      4578 9464
TIME...MOT...LOC 0437Z 268DEG 46KT 4628 9446 4589 9462
          4564 9478

HAIL...1.00IN
WIND...60MPH

$$

BORGHOFF
1 follow-up statement
401 
WWUS53 KMPX 220512 RRA
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1212 AM CDT TUE JUL 22 2014

MNC009-097-145-220522-
/O.EXP.KMPX.SV.W.0069.000000T0000Z-140722T0515Z/
BENTON MN-MORRISON MN-STEARNS MN-
1212 AM CDT TUE JUL 22 2014

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN STEARNS...MORRISON
AND NORTHWESTERN BENTON COUNTIES WILL EXPIRE AT 1215 AM CDT...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAS WEAKENED BELOW
SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR
PROPERTY.

ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A SEVERE 
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 4 AM CDT.

LAT...LON 4635 9465 4631 9455 4634 9443 4630 9435
      4627 9433 4623 9438 4616 9436 4616 9400
      4579 9411 4564 9423 4554 9440 4556 9497
      4578 9464
TIME...MOT...LOC 0512Z 268DEG 46KT 4629 9381 4590 9398
          4565 9414

$$

BORGHOFF

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 21, 10:13 PM CDTSevere Thunderstorm WarningMPXStevens47 min
Jul 21, 10:33 PM CDTSevere Thunderstorm WarningMPXDouglas, Pope42 min
Jul 21, 11:08 PM CDTSevere Thunderstorm WarningMPXDouglas, Pope, Stearns, Todd67 min
Jul 22, 12:11 AM CDTSpecial Weather StatementMPXBenton, Isanti, Kanabec, Mille Lacs79 min
Jul 22, 12:47 AM CDTSevere Thunderstorm WarningMPXKanabec, Mille Lacs58 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2014Every severe thunderstorm warning in 2014

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.