Alert archive / Montana / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 18, NWS Missoula, MT

June 4, 2012Lincoln County, Montana

NWS Missoula, MT issued this severe thunderstorm warning at Jun 4, 2012, 11:10 PM MDT for Lincoln County, Montana. It was in force for 22 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
Jun 4, 2012, 11:10 PM MDT (05:10 UTC)
Expired
Jun 4, 2012, 11:32 PM MDT
In force
22 min
Issued by
NWS Missoula, MT
Area
Storm-based polygon

County Lincoln County, MT

The radar

The Missoula radar (KMSX), 222 km from the middle of the area, began a volume at 05:12 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
Jun 4, 1:46 PM MDTSevere Thunderstorm WatchSPC10 hr

The nearest sounding before it

Spokane, WA (KOTX), launched 00:00Z, 5.2 hours before the alert went out and 158 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, Spokane, WA at 00:00Z on 2012-06-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Spokane, WA at 00:00Z on 2012-06-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -34 square meters per square second.1939587897117Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1397 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
-34 m²/s²
0-3 km storm-relative helicity
211 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.

301 
WUUS55 KMSO 050510
SVRMSO
MTC053-050600-
/O.NEW.KMSO.SV.W.0018.120605T0510Z-120605T0600Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MISSOULA MT
1110 PM MDT MON JUN 4 2012

THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN LINCOLN COUNTY IN NORTHWEST MONTANA...

* UNTIL MIDNIGHT MDT.

* AT 1108 PM MDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING HAIL UP TO ONE INCH IN DIAMETER.  THIS STORM
  WAS LOCATED 27 MILES SOUTH OF EUREKA...OR ABOUT 26 MILES EAST OF
  LIBBY...AND WAS MOVING NORTH AT 60 MPH.

* LOCATIONS IMPACTED INCLUDE...EUREKA AND REXFORD.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

LARGE HAIL IS LIKELY WITH THIS SEVERE THUNDERSTORM. DAMAGING WINDS
ARE POSSIBLE...ALONG WITH FREQUENT LIGHTNING AND HEAVY RAIN. FOR YOUR
PROTECTION...GO INDOORS AND STAY AWAY FROM WINDOWS. IF YOU ARE CAUGHT
OUTSIDE...MOVE TO A WELL PROTECTED AREA.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM MDT
TUESDAY MORNING FOR NORTH CENTRAL IDAHO AND NORTHWESTERN MONTANA.

&&

LAT...LON 4901 11524 4901 11489 4844 11490 4843 11516
      4901 11543 4902 11538 4902 11525
TIME...MOT...LOC 0511Z 174DEG 50KT 4852 11501

$$
2 follow-up statements
760 
WWUS55 KMSO 050525
SVSMSO

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MISSOULA MT
1125 PM MDT MON JUN 4 2012

MTC053-050600-
/O.CON.KMSO.SV.W.0018.000000T0000Z-120605T0600Z/
LINCOLN MT-
1125 PM MDT MON JUN 4 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT
FOR NORTHERN LINCOLN COUNTY...

* AT 1124 PM MDT...DOPPLER RADAR CONTINUED TO INDICATE A SEVERE   
THUNDERSTORM CAPABLE OF PRODUCING HAIL UP TO ONE INCH IN 
DIAMETER...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS 
LOCATED 12 MILES SOUTH OF EUREKA...OR ABOUT 32 MILES NORTHEAST OF 
LIBBY...AND WAS MOVING NORTH AT 55 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM MDT
TUESDAY MORNING FOR NORTH CENTRAL IDAHO AND NORTHWESTERN MONTANA.

&&

LAT...LON 4901 11524 4901 11489 4865 11493 4865 11525
      4901 11543 4902 11538 4902 11525
TIME...MOT...LOC 0524Z 174DEG 50KT 4870 11504

$$
397 
WWUS55 KMSO 050532
SVSMSO

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MISSOULA MT
1132 PM MDT MON JUN 4 2012

MTC053-050542-
/O.CAN.KMSO.SV.W.0018.000000T0000Z-120605T0600Z/
LINCOLN MT-
1132 PM MDT MON JUN 4 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN LINCOLN COUNTY IS
CANCELLED...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM MDT
TUESDAY MORNING FOR NORTH CENTRAL IDAHO AND NORTHWESTERN MONTANA.

LAT...LON 4901 11524 4901 11489 4865 11493 4865 11525
      4901 11543 4902 11538 4902 11525
TIME...MOT...LOC 0532Z 174DEG 50KT 4881 11506

$$

The office that day

Everything else NWS Missoula, MT issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 4, 7:05 PM MDTSpecial Weather StatementMSO40 min
Jun 4, 11:11 PM MDTSevere Thunderstorm WarningMSOMineral, Sanders35 min
Jun 5, 2:34 PM MDTWinter Weather AdvisoryMSOFlathead, Lake27 hr

Nearby

Severe Thunderstorm Warnings in Montana, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.