Alert archive / Wyoming / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 293, NWS Billings, MT

July 28, 2001Sheridan County, Wyoming

NWS Billings, MT issued this severe thunderstorm warning at Jul 28, 2001, 3:14 PM MDT for Sheridan County, Wyoming. It was in force for 61 min. 2 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Jul 28, 2001, 3:14 PM MDT (21:14 UTC)
Expired
Jul 28, 2001, 4:15 PM MDT
In force
61 min
Issued by
NWS Billings, MT
Area
Whole counties

County Sheridan County, WY

The radar

The Billings radar (KBLX), 180 km from the middle of the area, began a volume at 21:13 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.

What was reported inside it

TimeReportWhereRemark
Jul 28, 3:22 PM MDTThunderstorm Wind 64 MSheridan Arpt, WY64 mph thunderstorm wind gust reported at the airport
Jul 28, 3:26 PM MDTThunderstorm Wind 72 ESheridan, WY72 mph thunderstorm wind gust estimated by spotter.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Rapid City, SD (KUNR), launched 12:00Z, 9.2 hours before the alert went out and 327 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, Rapid City, SD at 12:00Z on 2001-07-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1178 joules per kilogram.LCLLFCEL10008507005003002001001 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, Rapid City, SD at 12:00Z on 2001-07-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 116 square meters per square second.193958Sfc1 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
1178 J/kg
Mixed-layer CIN
-276 J/kg
Mixed-layer LCL
1500 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
116 m²/s²
0-3 km storm-relative helicity
114 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 Billings, MT wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 28, 2:05 PM MDT, 1 hour 9 minutes earlier.

Area forecast discussion, Jul 28, 2:05 PM MDT, 1 hour 9 minutes before
SOUTH CENTRAL AND SOUTHEAST MONTANA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BILLINGS MT
205 PM MDT SAT JUL 28 2001

.SUN AND MON...
ACTIVE EVENING SETTING UP. MODELS FAIRLY SIMILAR IN TROUGH PLACEMENT.
THE ETA IS A LITTLE SLOWER AND PREFERRED BASED ON THE TROUGH BECOMING
NEGATIVELY TILTED. STRONG COLD FRONT MOVING INTO WESTERN MONTANA AT THE
MOMENT. SURFACE TROUGH AHEAD OF THE FRONT SEPARATES QUITE A DEWPOINT
DIFFERENCE. FRONT SHOULD GET INTO THE LIVINGSTON AREA AROUND 00Z AND
THEN SLIDE INTO THE SOUTHEAST BY MIDNIGHT. CAPES AROUND 1500-3500 JKG
FROM SOUTH CENTRAL MONTANA INTO THE SOUTHEAST. SHEAR POWERFUL OVER THE
SOUTHEAST. SEVERE MULTICELLULAR STORMS EXPECTED OVER SOUTH CENTRAL
MONTANA WITH SUPERCELLS OVER THE SOUTHEAST. WILL MENTION SEVERE. SUNDAY
SHOULD BE FAIRLY QUIET AS THE FRONT CLEARS THIS OUT. STILL SOUTHWEST
FLOW HOWEVER LEFT OVER AT 500MB. FRONT LAYS DOWN OVER WYOMING WITH A
TONGUE OF INSTABILITY PUSHING BACK ALONG THE MOUNTAINS. WAVES PROGGED TO
CRUISE NORTH OF THE AREA AS NEXT UPSTREAM TROUGH DIGS OVER THE
NORTHWEST. WILL INCLUDE A LOW POP OVER THE MOUNTAINS AS RIGHT REAR QUAD
OF THE JET TO BE IN THIS AREA AIDING ASCENT. THE SOUTHEAST SHOULD BE
FAIRLY STABLE FOR A CHANGE BEHIND THE FRONT. MORE MOISTURE GETS DRAWN IN
FROM MONDAY FOR LOW POPS ALL AROUND. TEMPERATURES WILL BE DRAMATICALLY
COOLER THE NEXT TWO DAYS. WILL NOT BE AGGRESSIVE IN THE COOLING THE
GUIDANCE...AS FRONT SHOULD NOT DRIVE THAT FAR SOUTH AND BEST COOLING
WILL BE NORTH. HUMPHREY

.TUE...WED...THU...FRI...SAT...
NEW AVN RUN IS KEEPING QUITE A BIT OF TROUGHINESS OVER THE AREA ON
TUESDAY WITH PRECIPITABLE H20S STILL RUNNING FROM .75 TO 1.00. THUS
THUNDER STAYS IN THE FORECAST WITH TEMPS JUST A FEW DEGREES WARMER THAN
MONDAY. WEDNESDAY WILL STILL SEE ISOLATED ACTIVITY BUT SURFACE PATTERN
IS INDICATED RETURN MOISTURE MAY BE CUTOFF FROM REACHING THE AREA AS
SURFACE PRESSURE FAVORS THE AREA. SOUTHWEST FLOW REDEVELOPS LATER IN THE
EXTENDED AND THE SURFACE PATTERN BECOMES A BIT MORE FAVORABLE FOR RETURN
MOISTURE. WILL GO WITH A MOSTLY DRY FORECAST FOR WESTERN SECTIONS ON
WEDNESDAY AND THE WHOLE AREA ON THURSDAY...OTHERWISE MOST AFTERNOONS AND
EVENINGS WILL CONTINUE THE SUMMER OF THUNDER. BORSUM

    SUN     MON     TUE     WED     THU     FRI     SAT
-----------------------------------------------------------
BIL 056/082 054/082 056/080 058/085 060/088 060/088 055/088
    40/T    22/T    33/T    32/B    22/B    33/T    33/T
LVM 048/079 046/079 050/078 052/083 055/086 055/086 055/086
    32/T    23/T    33/T    32/B    22/B    33/T    33/T
HDN 054/082 052/082 054/082 056/087 058/090 058/090 058/090
    40/T    22/T    33/T    32/B    22/B    33/T    33/T
MLS 062/082 058/082 060/085 062/090 062/092 062/092 059/092
    40/B    22/T    33/T    33/T    22/B    33/T    33/T
4BQ 062/082 058/082 060/085 062/090 062/092 062/092 062/092
    60/B    02/T    33/T    33/T    22/B    33/T    33/T
BHK 061/081 057/081 058/084 060/089 060/091 060/091 060/091
    60/B    02/T    33/T    33/T    22/B    33/T    33/T
SHR 054/082 050/084 052/083 054/088 057/090 057/092 052/092
    32/T    23/T    33/T    33/B    22/B    33/T    33/T

In the hours before

Local storm report, Jul 28, 10:45 AM MDT, 4 hours 29 minutes before
PRELIMINARY LOCAL STORM REPORT...AMENDED
NATIONAL WEATHER SERVICE BILLINGS, MT
1045 AM MDT SAT JUL 28 2001

TIME(MDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0900 PM    6 SW MOLT                 MT   60-70 MPH TSTM WIND GUST
07/27/01   STILLWATER                     WIND BLEW OVER 4 LARGE
                                          TREES. REPORTED BY SPOTTERS

0920 PM    3 NE LAUREL               MT   .88 INCH HAIL
07/27/01   YELLOWSTONE                    REPORTED BY SPOTTERS

0935 PM    BILLINGS                  MT   .75 INCH HAIL
07/27/01   YELLOWSTONE                    REPORTED BY NATIONAL WEATHER SERVICE

1044 PM    5 W HARDIN                MT   60 MPH TSTM WIND GUST
07/27/01   BIG HORN                       REPORTED BY LAW ENFORCEMENT

1103 PM    HARDIN                    MT   .75 INCH HAIL
07/27/01   BIG HORN                       REPORTED BY SPOTTERS

1109 PM    8 N HARDIN                MT   100 MPH TSTM WIND GUST. SEVERAL 5 TO
07/27/01   BIG HORN                       6 FOOT DIAMETER TREES BLOWN DOWN.
                                          REPORTED BY LAW ENFORCEMENT

RC

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 27, 8:20 PM MDTSevere Thunderstorm WarningBYZGolden Valley55 min
Jul 27, 8:53 PM MDTSevere Thunderstorm WarningBYZStillwater, Yellowstone67 min
Jul 27, 9:00 PM MDTSevere Thunderstorm WarningBYZMusselshell60 min
Jul 27, 9:22 PM MDTSevere Thunderstorm WarningBYZCarbon38 min
Jul 27, 9:52 PM MDTSevere Thunderstorm WarningBYZBig Horn53 min
Jul 27, 10:00 PM MDTSevere Thunderstorm WarningBYZYellowstone60 min
Jul 27, 10:49 PM MDTSevere Thunderstorm WarningBYZBig Horn56 min
Jul 27, 11:10 PM MDTSevere Thunderstorm WarningBYZTreasure, Yellowstone65 min
Jul 27, 11:38 PM MDTSevere Thunderstorm WarningBYZRosebud, Treasure67 min
Jul 28, 1:15 AM MDTSevere Thunderstorm WarningBYZCuster60 min
Jul 28, 1:47 AM MDTSevere Thunderstorm WarningBYZCuster, Powder River58 min
Jul 28, 2:25 AM MDTSevere Thunderstorm WarningBYZCarter, Fallon80 min
Jul 28, 3:53 AM MDTSevere Thunderstorm WarningBYZFallon67 min
Jul 28, 3:20 PM MDTSevere Thunderstorm WarningBYZBig Horn, Yellowstone55 min
Jul 28, 4:07 PM MDTSevere Thunderstorm WarningBYZTreasure38 min
Jul 28, 4:15 PM MDTSevere Thunderstorm WarningBYZMusselshell, Rosebud60 min
Jul 28, 4:40 PM MDTSevere Thunderstorm WarningBYZRosebud60 min
Jul 28, 5:40 PM MDTSevere Thunderstorm WarningBYZCuster, Rosebud60 min

Nearby

Severe Thunderstorm Warnings in Wyoming, 2001Every severe thunderstorm warning in 2001

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.