Alert archive / Montana / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 21, NWS Missoula, MT

June 23, 2012Lincoln County, Montana

NWS Missoula, MT issued this severe thunderstorm warning at Jun 23, 2012, 4:25 PM MDT for Lincoln County, Montana. It was in force for 31 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 23, 2012, 4:25 PM MDT (22:25 UTC)
Expired
Jun 23, 2012, 4:56 PM MDT
In force
31 min
Issued by
NWS Missoula, MT
Area
Storm-based polygon

County Lincoln County, MT

The radar

The Spokane radar (KOTX), 197 km from the middle of the area, began a volume at 22:27 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 nearest sounding before it

Spokane, WA (KOTX), launched 12:00Z, 10.4 hours before the alert went out and 128 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 12:00Z on 2012-06-23Temperature 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°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Spokane, WA at 12:00Z on 2012-06-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -5 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
779 m above ground
0-6 km bulk shear
59 kt
0-1 km storm-relative helicity
-5 m²/s²
0-3 km storm-relative helicity
164 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

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

019 
WUUS55 KMSO 232225
SVRMSO
MTC053-232315-
/O.NEW.KMSO.SV.W.0021.120623T2225Z-120623T2315Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MISSOULA MT
425 PM MDT SAT JUN 23 2012

THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A

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

* UNTIL 515 PM MDT.

* AT 418 PM MDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING ONE INCH HAIL...AND DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED OVER CENTRAL LINCOLN COUNTY...OR
  ABOUT NEAR LIBBY...AND WAS MOVING NORTHEAST AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF THE
  INDICATED COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS AND HAIL...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.

&&

LAT...LON 4883 11546 4872 11501 4835 11538 4842 11563
TIME...MOT...LOC 2225Z 203DEG 17KT 4847 11545

$$
KITSMILLER
2 follow-up statements
520 
WWUS55 KMSO 232247
SVSMSO

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MISSOULA MT
447 PM MDT SAT JUN 23 2012

MTC053-232315-
/O.CON.KMSO.SV.W.0021.000000T0000Z-120623T2315Z/
LINCOLN MT-
447 PM MDT SAT JUN 23 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM MDT
FOR CENTRAL LINCOLN COUNTY...

* AT 442 PM MDT...DOPPLER RADAR CONTINUED TO INDICATE A SEVERE
  THUNDERSTORM CAPABLE OF PRODUCING HAIL UP TO ONE INCH IN DIAMETER. 
  THIS STORM WAS LOCATED OVER CENTRAL LINCOLN COUNTY...OR ABOUT 13
  MILES NORTHEAST OF LIBBY...AND WAS MOVING NORTHEAST AT 20 MPH.

LAT...LON 4882 11545 4871 11503 4844 11530 4851 11557
TIME...MOT...LOC 2247Z 203DEG 17KT 4857 11539

$$
KITSMILLER
699 
WWUS55 KMSO 232256
SVSMSO

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MISSOULA MT
456 PM MDT SAT JUN 23 2012

MTC053-232306-
/O.CAN.KMSO.SV.W.0021.000000T0000Z-120623T2315Z/
LINCOLN MT-
456 PM MDT SAT JUN 23 2012

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

LAT...LON 4882 11545 4871 11503 4844 11530 4851 11557
TIME...MOT...LOC 2256Z 203DEG 17KT 4861 11536

$$
KITSMILLER

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 23, 2:43 PM MDTSpecial Weather StatementMSOGranite47 min
Jun 23, 2:55 PM MDTRed Flag WarningMSOBeaverhead, Deer Lodge, Granite, Jefferson, Madison, Powell and 1 more30 hr
Jun 23, 2:56 PM MDTSevere Thunderstorm WarningMSOGranite, Missoula, Ravalli64 min
Jun 23, 3:56 PM MDTSpecial Weather StatementMSOLincoln49 min
Jun 23, 4:21 PM MDTSpecial Weather StatementMSO54 min
Jun 23, 5:51 PM MDTSpecial Weather StatementMSOMissoula39 min

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.