Alert archive / Minnesota / Tornado Warnings in 2014

Tornado Warning 9, NWS Twin Cities, MN

May 8, 2014Sibley County, Minnesota

NWS Twin Cities, MN issued this tornado warning at May 8, 2014, 8:05 PM CDT for Sibley County, Minnesota. It was in force for 25 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 8, 2014, 8:05 PM CDT (01:05 UTC)
Expired
May 8, 2014, 8:30 PM CDT
In force
25 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Tornado
Observed
Hail
1.75 in

County Sibley County, MN

The radar

The Minneapolis radar (KMPX), 61 km from the middle of the area, began a volume at 01:04 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
May 8, 1:46 PM CDTTornado WatchSPC7 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 1.1 hours before the alert went out and 59 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 2014-05-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 18 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 00:00Z on 2014-05-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 115 square meters per square second.19395878Sfc1 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
18 J/kg
Mixed-layer CIN
-160 J/kg
Mixed-layer LCL
785 m above ground
0-6 km bulk shear
58 kt
0-1 km storm-relative helicity
115 m²/s²
0-3 km storm-relative helicity
184 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.9

Open this sounding in Storm Lab

The text

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

815 
WFUS53 KMPX 090105
TORMPX
MNC143-090130-
/O.NEW.KMPX.TO.W.0009.140509T0105Z-140509T0130Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
805 PM CDT THU MAY 8 2014

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL SIBLEY COUNTY IN CENTRAL MINNESOTA...

* UNTIL 830 PM CDT

* AT 804 PM CDT...A CONFIRMED TORNADO WAS LOCATED NEAR GAYLORD...AND
  MOVING NORTHEAST AT 30 MPH.

  HAZARD...DAMAGING TORNADO AND GOLF BALL SIZE HAIL.

  SOURCE...WEATHER SPOTTERS CONFIRMED TORNADO.

  IMPACT...FLYING DEBRIS WILL BE DANGEROUS TO THOSE CAUGHT WITHOUT
           SHELTER. MOBILE HOMES WILL BE DAMAGED OR DESTROYED. DAMAGE
           TO ROOFS...WINDOWS AND VEHICLES WILL OCCUR. TREE DAMAGE IS
           LIKELY.

* THE TORNADO WILL AFFECT MAINLY RURAL AREAS OF CENTRAL SIBLEY
  COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPEAT...A TORNADO IS ON THE GROUND. TAKE COVER NOW. MOVE TO AN
INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING. AVOID
WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR OUTDOORS...MOVE TO THE
CLOSEST SUBSTANTIAL SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4458 9435 4469 9417 4461 9409 4454 9431
TIME...MOT...LOC 0106Z 239DEG 27KT 4459 9426

TORNADO...OBSERVED
HAIL...1.75IN

$$

JRB
2 follow-up statements
556 
WWUS53 KMPX 090110
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
810 PM CDT THU MAY 8 2014

MNC143-090130-
/O.CON.KMPX.TO.W.0009.000000T0000Z-140509T0130Z/
SIBLEY MN-
810 PM CDT THU MAY 8 2014

...A TORNADO WARNING REMAINS IN EFFECT FOR CENTRAL SIBLEY COUNTY
UNTIL 830 PM CDT...

AT 809 PM CDT...A CONFIRMED TORNADO WAS LOCATED NEAR GAYLORD...AND
MOVING NORTHEAST AT 35 MPH.

HAZARD...DAMAGING TORNADO AND GOLF BALL SIZE HAIL.

SOURCE...LAW ENFORCEMENT CONFIRMED TORNADO.

IMPACT...FLYING DEBRIS WILL BE DANGEROUS TO THOSE CAUGHT WITHOUT
         SHELTER. MOBILE HOMES WILL BE DAMAGED OR DESTROYED. DAMAGE
         TO ROOFS...WINDOWS AND VEHICLES WILL OCCUR. TREE DAMAGE IS
         LIKELY.

LOCATIONS IMPACTED INCLUDE...
  MAINLY RURAL AREAS OF CENTRAL SIBLEY COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPEAT...A TORNADO IS ON THE GROUND. TAKE COVER NOW. MOVE TO AN
INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING. AVOID
WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR OUTDOORS...MOVE TO THE
CLOSEST SUBSTANTIAL SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4457 9421 4463 9426 4464 9425 4469 9417
      4461 9409
TIME...MOT...LOC 0111Z 239DEG 29KT 4462 9418

TORNADO...OBSERVED
HAIL...1.75IN

$$

JRB
940 
WWUS53 KMPX 090120
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
820 PM CDT THU MAY 8 2014

MNC143-090130-
/O.CAN.KMPX.TO.W.0009.000000T0000Z-140509T0130Z/
SIBLEY MN-
820 PM CDT THU MAY 8 2014

...THE TORNADO WARNING FOR CENTRAL SIBLEY COUNTY IS CANCELLED...

THE TORNADO THREAT HAS DIMINISHED...THEREFORE THE TORNADO WARNING HAS
BEEN CANCELLED. HOWEVER...A SEVERE THUNDERSTORM WARNING REMAINS IN 
EFFECT FOR THE AREA AND LARGE HAIL IS STILL POSSIBLE WITH THIS 
THUNDERSTORM.

IN ADDITION...STRONG THUNDERSTORMS MAY REDEVELOP...AND A TORNADO 
WATCH REMAINS IN EFFECT UNTIL 9PM CDT.

LAT...LON 4457 9421 4463 9426 4464 9425 4469 9417
      4461 9409
TIME...MOT...LOC 0120Z 239DEG 29KT 4466 9409

$$

JRB

The office that day

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

IssuedProductOfficeCountiesLasted
May 8, 7:23 PM CDTSevere Thunderstorm WarningMPXNicollet, Sibley22 min
May 8, 7:50 PM CDTSevere Thunderstorm WarningMPXMcLeod, Sibley40 min
May 8, 8:38 PM CDTSpecial Weather StatementMPXAnoka, Carver, Hennepin, Isanti67 min
May 8, 9:33 PM CDTSpecial Weather StatementMPXIsanti42 min

Nearby

Tornado Warnings in Minnesota, 2014Every tornado warning in 2014Tornadoes 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.