Alert archive / Montana / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 29, NWS Great Falls, MT

June 27, 2002Blaine County, Fergus County, Montana

NWS Great Falls, MT issued this severe thunderstorm warning at Jun 27, 2002, 9:08 PM MDT for Blaine County, Fergus County, Montana. It was in force for 37 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 27, 2002, 9:08 PM MDT (03:08 UTC)
Expired: Jun 27, 2002, 9:45 PM MDT
In force: 37 min
Issued by: NWS Great Falls, MT
Area: Counties, with a storm outline in the text

Counties Blaine County, MT, Fergus County, MT

The radar

The Great Falls radar (KTFX), 164 km from the middle of the area, began a volume at 03:09 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

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

Issued	Product	Office	Lasted
Jun 27, 6:00 PM MDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Great_falls, MT (KTFX), launched 00:00Z, 3.1 hours before the alert went out and 108 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 586 J/kg
Mixed-layer CIN: -54 J/kg
Mixed-layer LCL: 3449 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: -16 m²/s²
0-3 km storm-relative helicity: -9 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.4

Open this sounding in Storm Lab

The text

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

000 
WUUS55 KTFX 280308
SVRTFX
MTC005-027-280345-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREAT FALLS MT
907 PM MDT THU JUN 27 2002

THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTH CENTRAL FERGUS COUNTY IN CENTRAL MONTANA
  SOUTHWESTERN BLAINE COUNTY IN NORTH CENTRAL MONTANA

* UNTIL 945 PM MDT

* AT 859 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER NORTH CENTRAL FERGUS COUNTY...OR ABOUT 41
  MILES NORTH OF LEWISTOWN...MOVING NORTHEAST AT 20 MPH.

DAMAGING WINDS IN EXCESS OF 55 MPH ARE LIKELY WITH THIS SEVERE 
THUNDERSTORM. LARGE HAIL IS 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.

LAT...LON 4768 10952 4756 10933 4809 10875 4817 10924

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Great Falls, MT wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 27, 8:45 PM MDT, 23 minutes earlier.

Area forecast discussion, Jun 27, 8:45 PM MDT, 23 minutes before

SOUTHWEST AND NORTH CENTRAL MONTANA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREAT FALLS MT
845 PM MDT THU JUN 27 2002

WILL UPDATE ZFP AND SFP BY 930 PM.

.SHORT TERM...CONVECTION CONTINUING TO GO STRONG OVER NORTH CENTRAL
MONTANA IN RESPONSE TO A COUPLE OF SHORTWAVES MOVING THROUGH THE
AREA. STORMS WILL CONTINUE TO TRACK SLOWLY TO THE NORTHEAST...
EXITING THE CWA BY MIDNIGHT. THE POTENTIAL FOR HAIL OR STRONG WINDS
SHOULD DIMINISH BY MIDNIGHT...BUT SHOWERS AND EMBEDDED THUNDERSTORMS
WILL CONTINUE IN THE FAR EASTERN ZONES INTO THE EARLY MORNING HOURS.
COOLER AIR AND SUBSIDENCE BEHIND THE SHORTWAVES HAVE STABILIZED MOST
OF SOUTHWEST MONTANA...SO WILL REMOVE POPS IN THESE AREAS.
CONSIDERABLE CONVECTIVE DEBRIS WILL HANG OVER THE CWA TONIGHT SO WILL
ADJUST CLOUD COVER MOST AREAS. TEMPERATURES WILL REMAIN WARM WITH
EXTENSIVE CLOUD COVER...AND CURRENT NUMBERS LOOK REASONABLE. JCA

.EXTENDED...A BROAD UPPER LEVEL TROUGH OVER WESTERN CANADA WILL
LEAVE THE REGION IN A WEST TO SOUTHWEST FLOW THROUGH THE EXTENDED
PERIOD. FLOW ALOFT MONDAY LOOKS TO BE MAINLY WESTERLY WHICH WILL
KEEP THE CWA DRY. THERE WILL BE A CHANCE OF THUNDERSTORMS ON TUESDAY
AS THE FLOW ALOFT SHIFTS MORE SOUTHWESTERLY. WILL CONTINUE THE
CHANCE OF THUNDERSTORMS WEDNESDAY AND THURSDAY AS SOUTHWEST FLOW
PERSIST. TEMPERATURES DURING THE PERIOD WILL BE AROUND NORMAL. MEIER

.CCF NUMBERS
GTF BB 062/092 060/085 052 14124
    NBBBB 080/047 075/045 078/048 082/048 080 32111133333
CTB BB 059/086 056/078 050 14324
    NBBBB 074/045 072/042 077/046 078/048 078 32111133333
HLN BB 062/092 060/086 052 14124
    BBBBB 082/048 077/050 080/050 082/050 082 32111133333
BZN BB 055/091 054/084 050 14222
    BBBBB 082/045 075/045 077/049 080/049 080 32111133333
WEY BB 044/085 045/081 042 14222
    BBBBB 079/042 072/041 076/041 075/041 075 32111133333
DLN BB 057/090 056/085 050 14122
    NBBBB 082/048 079/045 078/048 080/050 082 32111133333
HVR BB 063/095 064/089 054 14414
    BBBBB 083/048 078/048 078/050 082/050 082 32111133333
LWT BB 060/088 058/083 052 14423
    BBBBB 080/045 075/044 079/050 080/050 080 32111133333=

.TFX...FLOOD WARNING CONTINUES FOR GLACIER COUNTY (ZONES 9 AND 10).

In the hours before

Local storm report, Jun 27, 7:43 PM MDT, 1 hour 25 minutes before

LOCAL STORM REPORT...UPDATED
NATIONAL WEATHER SERVICE GREAT FALLS MT
743 PM MDT THU JUN 27 2002

TIME(MDT)  .....EVENT  LOCATION..... ST   ...EVENT/REMARKS...........
           .....COUNTY LOCATION.....

0223 PM    35 SW DILLON              MT   64 MPH TSTM GUST
06/27/02   BEAVERHEAD                     BRENNER RAWS

0555 PM    LINCOLN                   MT   0.50 INCH HAIL
06/27/02   LEWIS  AND  CLARK              TREES OVER POWER LINES
                                          AND HEAVY RAIN

0555 PM    LINCOLN                   MT   60 MPH TSTM GUST
06/27/02   LEWIS  AND  CLARK

0555 PM    LINCOLN                   MT   WIND DAMAGE
06/27/02   LEWIS  AND  CLARK

0720 PM    CONRAD                    MT   60 MPH TSTM GUST
06/27/02   PONDERA

0720 PM    CONRAD                    MT   60 MPH TSTM GUST
06/27/02   PONDERA

0605 PM    20 SE CASCADE             MT   70 MPH TSTM GUST
06/27/02   CASCADE                        2X4 LIFTED OFF GROUND

0715 PM    5 W CHOTEAU               MT   60 MPH TSTM GUST
06/27/02   TETON

0720 PM    CONRAD                    MT   60 MPH TSTM GUST
06/27/02   PONDERA

NNNN

Local storm report, Jun 27, 8:05 PM MDT, 1 hour 3 minutes before

LOCAL STORM REPORT...UPDATED
NATIONAL WEATHER SERVICE GREAT FALLS MT
805 PM MDT THU JUN 27 2002

TIME(MDT)  .....EVENT  LOCATION..... ST   ...EVENT/REMARKS...........
           .....COUNTY LOCATION.....

0223 PM    35 SW DILLON              MT   64 MPH TSTM GUST
06/27/02   BEAVERHEAD

0555 PM    LINCOLN                   MT   0.50 INCH HAIL
06/27/02   LEWIS  AND  CLARK              TREES OVER POWER LINES AND
                                          HEAVY RAIN

0555 PM    LINCOLN                   MT   60 MPH TSTM GUST
06/27/02   LEWIS  AND  CLARK              WIND DAMAGE

0720 PM    CONRAD                    MT   60 MPH TSTM GUST
06/27/02   PONDERA

0720 PM    CONRAD                    MT   60 MPH TSTM GUST
06/27/02   PONDERA

0605 PM    20 SE CASCADE             MT   70 MPH TSTM GUST
06/27/02   CASCADE                        2X4 LIFTED OFF GROUND

0715 PM    5 W CHOTEAU               MT   60 MPH TSTM GUST
06/27/02   TETON

0720 PM    CONRAD                    MT   60 MPH TSTM GUST
06/27/02   PONDERA

0730 PM    2 N RAYNESFORD            MT   60 MPH TSTM GUST
06/27/02   JUDITH  BASIN

0735 PM    11 SE CONRAD              MT   62 MPH TSTM GUST
06/27/02   PONDERA

NNNN

Local storm report, Jun 27, 8:15 PM MDT, 53 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
815 PM MDT THU JUN 27 2002

TIME(MDT)  .....EVENT  LOCATION..... ST   ...EVENT/REMARKS...........
           .....COUNTY LOCATION.....

0223 PM    35 SW DILLON              MT   64 MPH TSTM GUST
06/27/02   BEAVERHEAD

0555 PM    LINCOLN                   MT   0.50 INCH HAIL
06/27/02   LEWIS  AND  CLARK              TREES OVER POWER LINES AND
                                          HEAVY RAIN

0555 PM    LINCOLN                   MT   60 MPH TSTM GUST
06/27/02   LEWIS  AND  CLARK

0555 PM    LINCOLN                   MT   WIND DAMAGE
06/27/02   LEWIS  AND  CLARK

0720 PM    CONRAD                    MT   60 MPH TSTM GUST
06/27/02   PONDERA

0720 PM    CONRAD                    MT   60 MPH TSTM GUST
06/27/02   PONDERA

0605 PM    20 SE CASCADE             MT   70 MPH TSTM GUST
06/27/02   CASCADE                        2X4 LIFTED OFF GROUND

0715 PM    5 W CHOTEAU               MT   60 MPH TSTM GUST
06/27/02   TETON

0720 PM    CONRAD                    MT   60 MPH TSTM GUST
06/27/02   PONDERA

0730 PM    2 N RAYNESFORD            MT   60 MPH TSTM GUST
06/27/02   JUDITH  BASIN

0735 PM    MALMSTROM AFB             MT   59 MPH TSTM GUST
06/27/02   CASCADE

0735 PM    11 SE CONRAD              MT   62 MPH TSTM GUST
06/27/02   PONDERA

NNNN

Local storm report, Jun 27, 8:22 PM MDT, 46 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
822 PM MDT THU JUN 27 2002

TIME(MDT)  .....EVENT  LOCATION..... ST   ...EVENT/REMARKS...........
           .....COUNTY LOCATION.....

0223 PM    35 SW DILLON              MT   64 MPH TSTM GUST
06/27/02   BEAVERHEAD

0555 PM    LINCOLN                   MT   0.50 INCH HAIL
06/27/02   LEWIS  AND  CLARK              TREES OVER POWER LINES AND
                                          HEAVY RAIN

0555 PM    LINCOLN                   MT   60 MPH TSTM GUST
06/27/02   LEWIS  AND  CLARK

0555 PM    LINCOLN                   MT   WIND DAMAGE
06/27/02   LEWIS  AND  CLARK

0605 PM    20 SE CASCADE             MT   70 MPH TSTM GUST
06/27/02   CASCADE                        2X4 LIFTED OFF GROUND

0715 PM    5 W CHOTEAU               MT   60 MPH TSTM GUST
06/27/02   TETON

0720 PM    CONRAD                    MT   60 MPH TSTM GUST
06/27/02   PONDERA

0730 PM    2 N RAYNESFORD            MT   60 MPH TSTM GUST
06/27/02   JUDITH  BASIN

0735 PM    MALMSTROM AFB             MT   59 MPH TSTM GUST
06/27/02   CASCADE

0735 PM    11 SE CONRAD              MT   62 MPH TSTM GUST
06/27/02   PONDERA

0810 PM    14 SW SUNBURST            MT   1 INCH HAIL
06/27/02   TOOLE

NNNN

Local storm report, Jun 27, 8:56 PM MDT, 12 minutes before

LOCAL STORM REPORT...UPDATED
NATIONAL WEATHER SERVICE GREAT FALLS MT
856 PM MDT THU JUN 27 2002

TIME(MDT)  .....EVENT  LOCATION..... ST   ...EVENT/REMARKS...........
           .....COUNTY LOCATION.....

0223 PM    35 SW DILLON              MT   64 MPH TSTM GUST
06/27/02   BEAVERHEAD

0555 PM    LINCOLN                   MT   0.50 INCH HAIL
06/27/02   LEWIS  AND  CLARK              TREES OVER POWER LINES AND
                                          HEAVY RAIN

0555 PM    LINCOLN                   MT   60 MPH TSTM GUST
06/27/02   LEWIS  AND  CLARK

0555 PM    LINCOLN                   MT   WIND DAMAGE
06/27/02   LEWIS  AND  CLARK

0720 PM    CONRAD                    MT   60 MPH TSTM GUST
06/27/02   PONDERA

0605 PM    20 SE CASCADE             MT   70 MPH TSTM GUST
06/27/02   CASCADE                        2X4 LIFTED OFF GROUND

0715 PM    5 W CHOTEAU               MT   60 MPH TSTM GUST
06/27/02   TETON

0730 PM    2 N RAYNESFORD            MT   60 MPH TSTM GUST
06/27/02   JUDITH  BASIN

0735 PM    8 E GREAT FALLS           MT   59 MPH TSTM GUST
06/27/02   CASCADE

0735 PM    11 SE CONRAD              MT   62 MPH TSTM GUST
06/27/02   PONDERA

0821 PM    14 SW SUNBURST            MT   1 INCH HAIL
06/27/02   TOOLE

0855 PM    16 S RUDYARD              MT   1 INCH HAIL
06/27/02   HILL

NNNN

Special weather statement, Jun 27, 9:00 PM MDT, 8 minutes before

MTZ012-014-046-048>050-053-054-280345-

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREAT FALLS MT
900 PM MDT THU JUN 27 2002

..THE SEVERE THUNDERSTORM WATCH FOR A PORTION OF CENTRAL MONTANA HAS
BEEN CANCELLED...

THE SEVERE THUNDERSTORM WATCH WHICH INCLUDED
CHOUTEAU..CASCADE...JUDITH BASIN...TETON...PONDERA...BROADWATER
MEAGHER AND LEWIS AND CLARK COUNTIES HAS BEEN CANCELLED. SCATTERED
THUNDERSTORMS WILL CONTINUE OVER THE AREA THROUGH THE EVENING BUT
ARE NO LONGER EXPECTED TO BE SEVERE.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 27, 6:11 PM MDT	Severe Thunderstorm Warning	TFX	Toole	34 min
Jun 27, 7:06 PM MDT	Severe Thunderstorm Warning	TFX	Pondera, Teton	39 min
Jun 27, 7:08 PM MDT	Severe Thunderstorm Warning	TFX	Glacier	52 min
Jun 27, 7:20 PM MDT	Severe Thunderstorm Warning	TFX		40 min
Jun 27, 8:09 PM MDT	Severe Thunderstorm Warning	TFX	Toole	51 min
Jun 27, 8:56 PM MDT	Severe Thunderstorm Warning	TFX	Hill	34 min
Jun 28, 4:43 PM MDT	Severe Thunderstorm Warning	TFX	Beaverhead, Madison	47 min

Nearby

Severe Thunderstorm Warnings in Montana, 2002 Every severe thunderstorm warning in 2002

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.