Alert archive / Montana / Tornado Watches in 2005
Tornado Watch 431
The Storm Prediction Center issued this tornado watch at Jun 7, 2005, 5:25 PM MDT for 8 counties in Montana. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 7, 2005, 5:25 PM MDT (23:25 UTC)
- Expired
- Jun 8, 2005, 12:00 AM MDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
Counties Carter County, MT, Custer County, MT, Dawson County, MT, Fallon County, MT, Powder River County, MT, Prairie County, MT, Rosebud County, MT, Wibaux County, MT
The radar
The Billings radar (KBLX), 232 km from the middle of the area, began a volume at 23:27 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.
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Rapid City, SD (KUNR), launched 12:00Z, 11.4 hours before the alert went out and 281 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.
- Mixed-layer CAPE
- 149 J/kg
- Mixed-layer CIN
- -169 J/kg
- Mixed-layer LCL
- 1285 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 116 m²/s²
- 0-3 km storm-relative helicity
- 101 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted, in the capitals the NWS used until 2016.
000
WWUS20 KWNS 072324
SEL1
SPC WW 072324
MTZ000-WYZ000-080600-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 431
NWS STORM PREDICTION CENTER NORMAN OK
525 PM MDT TUE JUN 7 2005
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
SOUTHEAST MONTANA
NORTHEAST WYOMING
EFFECTIVE THIS TUESDAY AFTERNOON FROM 525 PM UNTIL MIDNIGHT MDT.
TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 65 STATUTE MILES
EAST AND WEST OF A LINE FROM 25 MILES WEST NORTHWEST OF GLENDIVE
MONTANA TO 55 MILES SOUTH OF BROADUS MONTANA. FOR A COMPLETE
DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE
(WOUS64 KWNS WOU1).
REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA.
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.
OTHER WATCH INFORMATION...THIS TORNADO WATCH REPLACES SEVERE
THUNDERSTORM WATCH NUMBER 426. WATCH NUMBER 426 WILL NOT BE IN
EFFECT AFTER 525 PM MDT. CONTINUE...WW 427...WW 428...WW 429...WW
430...
DISCUSSION...SUPERCELLS EXPECTED TO CONTINUE DEVELOPING IN EXIT
REGION OF STRONG JET STREAK ASSOCIATED WITH WRN WY UPR VORT.
STRONGLY BACKED LOW LEVEL UPSLOPE FLOW AND MOISTURE TRANSPORT WILL
CREATE ENVIRONMENT SUPPORTIVE OF ISOLATED TORNADOES IN ADDITION TO
LARGE HAIL.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450.
MEAN STORM MOTION VECTOR 20020.
...CORFIDI
471,1035 443,1040 443,1064 471,1064SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 7, 12:45 PM MDT | Severe Thunderstorm Watch | SPC | Carbon | 7 hr |
| Jun 7, 2:52 PM MDT | Mesoscale Discussion | SPC | Big Horn, Carbon, Carter, Powder River | 53 min |
| Jun 7, 3:40 PM MDT | Mesoscale Discussion | SPC | Carter, Fallon | 65 min |
Nearby
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.