Alert archive / Montana / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 39, NWS Glasgow, MT
NWS Glasgow, MT issued this severe thunderstorm warning at Jul 1, 2001, 3:01 PM MDT for Dawson County, Montana. It was in force for 59 min. 1 report 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 1, 2001, 3:01 PM MDT (21:01 UTC)
- Expired
- Jul 1, 2001, 4:00 PM MDT
- In force
- 59 min
- Issued by
- NWS Glasgow, MT
- Area
- Whole counties
County Dawson County, MT
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 1, 3:10 PM MDT | Hail 0.75 | Bloomfield, MT |
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
Glasgow Intl Airport, MT (KGGW), launched 12:00Z, 9.0 hours before the alert went out and 166 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 925 m above ground
- 0-6 km bulk shear
- 70 kt
- 0-1 km storm-relative helicity
- 202 m²/s²
- 0-3 km storm-relative helicity
- 302 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS55 KGGW 012101 SVRGGW MTC021-012200- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE GLASGOW MT 301 PM MDT SUN JUL 1 2001 THE NATIONAL WEATHER SERVICE IN GLASGOW HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHEASTERN DAWSON COUNTY IN NORTHEAST MONTANA * UNTIL 400 PM MDT * AT 256 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 18 MILES NORTHWEST OF INTAKE...OR ABmOUT 25 MILES NORTH OF GLENDIVE...MOVING SOUTHEAST AT 30 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... INTAKE BY 335 PM MDT THIS STORM HAS A HISTORY OF PRODUCING DAMAGING WINDS AND LARGE HAIL. .END 95
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 Glasgow, MT wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 1, 2:58 PM MDT, 3 minutes earlier.
Area forecast discussion, Jul 1, 2:58 PM MDT, 3 minutes before
NORTHEAST MONTANA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GLASGOW MT
258 PM MDT SUN JUL 1 2001
...WILL ALLOW LAKE WIND ADVISORY TO EXPIRE FOR FORT PECK LAKE...
SEVERE TSTORMS IN PROGRESS OVER MCCONE AND DAWSON COUNTIES MOVING
SE. ASSOCIATED WITH STRONG VORT MAX CROSSING W CONUS RIDGE...RIDGE
AXIS OVER CNTRL MT. NO EVIDENCE OF ANY SIGNIFICANT FEATURES
IMMEDIATELY UPSTREAM...BUT VORT OVER OREGON EJECTING FROM MAIN TROF
OVER NE PAC WITH SW FLOW OVER PAC NW INTO NW MT. ETA CARRIES THIS
FEATURE ACROSS S AND CNTRL MT OVERNIGHT...PLUS SHOWS SIGNS OF
WEAKENING FURTHER... WILL DISCOUNT FOR ALL BUT S ZONES. ETA
GRADUALLY RETROGRADES W CONUS RIDGE TO IDAHO BY END OF PD...ALLOWING
FLOW OVER NEMONT TO TURN MORE NW/LY. WK VORT MAX PROGGED TO CROSS
NEMONT MIDDAY TUES...CURRENTLY LOOKS QUITE WK AND PROGGED TO DAMP
OUT...WILL CARRY PTLY CLOUDY BUT NOT INCLUDE MENTION OF PRECIP. HI
PRESSURE PROGGED TO BUILD SE FROM SASK WITH SLIGHT THICKNESS
DECREASE EVIDENT TUESDAY IN ETA...IN LINE WITH FWC MOS GUIDANCE.
THIS SOLN LOOKS REASONABLE...WILL STAY CLOSE TO MOS TEMPS.
EXTENDED...W CONUS TROF PROGGED TO RETROGRADE AS CENTRAL NOAM LOW
DIGS INTO GT LAKES...AMPLIFYING FLOW AND BRINGING MORE NW FLOW TO
NEMONT BEFORE LOW BEGINS TO SHIFT INTO ST LAWRENCE VALLEY BY LATE IN
WK. AFTER INITIAL COOLING EARLY IN PD...GRADUAL WARMING AND DRY...
ALTHOUGH NW FLOW THIS TIME OF YEAR ALWAYS CARRIES POTENTIAL FOR
ISOLD CONVECTION. WILL KEEP FCST DRY...ESP AFTER READING NCEP
DISCUSSION ADVISING SLOWER PROGRESSION OF PATTERN. SECORA
KGGW 055/087 055/084 049/084 053/088 057/085 057/087 055/087
BBBUUUU 861101/8611111
KGDV 055/085 055/085 051/0M85 054/088 055/085 057/086 057/088
BBBUUUV 864101/8611111In the hours before
Local storm report, Jul 1, 2:36 PM MDT, 25 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GLASGOW MT
236 PM MDT SUN JUL 1 2001
TIME(MDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1241 PM VIDA MT .88 INCH HAIL
07/01/01 MCCONE
0136 PM 11 NW VIDA MT .75 INCH HAIL
07/01/01 MCCONE
0100 PM 13 NW VIDA MT 1.75 INCH HAIL
07/01/01 MCCONE CROPS FLATTENED
1132 AM NASHUA MT .88 INCH HAIL
07/01/01 VALLEY
0110 PM 2 S FRAZER MT .75 INCH HAIL
07/01/01 VALLEY
0205 PM VIDA MT .88 INCH HAIL
07/01/01 MCCONEThe office that day
Everything else NWS Glasgow, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 1, 7:57 AM MDT | Severe Thunderstorm Warning | GGW | Phillips | 63 min |
| Jul 1, 11:37 AM MDT | Severe Thunderstorm Warning | GGW | Roosevelt, Valley | 53 min |
| Jul 1, 11:58 AM MDT | Severe Thunderstorm Warning | GGW | McCone, Roosevelt, Valley | 32 min |
| Jul 1, 12:30 PM MDT | Severe Thunderstorm Warning | GGW | McCone | 30 min |
| Jul 1, 12:34 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 26 min |
| Jul 1, 12:51 PM MDT | Severe Thunderstorm Warning | GGW | McCone | 54 min |
| Jul 1, 12:56 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 64 min |
| Jul 1, 1:41 PM MDT | Severe Thunderstorm Warning | GGW | McCone | 64 min |
| Jul 1, 2:04 PM MDT | Severe Thunderstorm Warning | GGW | Dawson | 56 min |
Nearby
Severe Thunderstorm Warnings in Montana, 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.