Alert archive / Montana / Tornado Warnings in 2010
Tornado Warning 1, NWS Glasgow, MT
NWS Glasgow, MT issued this tornado warning at May 27, 2010, 9:01 PM MDT for McCone County, Prairie County, Montana. It was in force for 59 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- May 27, 2010, 9:01 PM MDT (03:01 UTC)
- Expired
- May 27, 2010, 10:00 PM MDT
- In force
- 59 min
- Issued by
- NWS Glasgow, MT
- Area
- Storm-based polygon
Counties McCone County, MT, Prairie County, MT
The radar
The Glasgow radar (KGGW), 131 km from the middle of the area, began a volume at 03:04 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 27, 4:39 PM MDT | Tornado Watch | SPC | 8 hr |
The nearest sounding before it
Glasgow Intl Airport, MT (KGGW), launched 00:00Z, 3.0 hours before the alert went out and 132 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
- 132 J/kg
- Mixed-layer CIN
- -220 J/kg
- Mixed-layer LCL
- 587 m above ground
- 0-6 km bulk shear
- 78 kt
- 0-1 km storm-relative helicity
- 297 m²/s²
- 0-3 km storm-relative helicity
- 346 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.0
What forecasters said that day
The local office's own words before this tornado 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 tornado warning went out at May 27, 5:49 PM MDT, 3 hours 12 minutes earlier.
Area forecast discussion, May 27, 5:49 PM MDT, 3 hours 12 minutes before
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</html>Hazardous weather outlook, May 27, 10:07 AM MDT, 10 hours 54 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GLASGOW MT 1007 AM MDT THU MAY 27 2010 MTZ016>027-059>062-281200- CENTRAL AND SOUTHEAST PHILLIPS-CENTRAL AND SOUTHERN VALLEY- DANIELS-SHERIDAN-WESTERN ROOSEVELT-PETROLEUM-GARFIELD-MCCONE- RICHLAND-DAWSON-PRAIRIE-WIBAUX-NORTHERN PHILLIPS- SOUTHWEST PHILLIPS-NORTHERN VALLEY-EASTERN ROOSEVELT- 1007 AM MDT THU MAY 27 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHEAST MONTANA. .DAY ONE...TODAY AND TONIGHT SCATTERED SHOWERS AND THUNDERSTORMS WILL AFFECT NORTHEAST MONTANA POSSIBLY THIS AFTERNOON BUT MORE LIKELY TONIGHT. SOME OF THESE STORMS WILL BECOME SEVERE WITH LARGE HAIL...DAMAGING WINDS AND POSSIBLY ISOLATED TORNADOES. HEAVY RAINFALL IS ALSO POSSIBLE. WITH MANY SMALL STREAMS NEAR BANKFULL AND GROUND SATURATED FROM RECENT RAINS...A FLASH FLOOD WATCH REMAINS IN EFFECT FOR TONIGHT FOR NORTHEAST MONTANA ROUGHLY EAST OF SACO TO COHAGEN LINE. A LAKE WIND ADVISORY IS IN EFFECT FOR FORT PECK LAKE THROUGH 9 PM THIS EVENING. LOOK FOR EAST WINDS 20 TO 30 MPH WITH GUSTS TO 40 MPH OVER FORT PECK LAKE TODAY. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ON FRIDAY NEAR THE NORTH DAKOTA BORDER. COLD AIR WILL IMPACT NORTHEAST MONTANA FOR THE MEMORIAL DAY WEEKEND. MORE RAIN IS LIKELY SATURDAY AND SATURDAY NIGHT. TEMPERATURES WILL BE COLD ENOUGH SATURDAY NIGHT AND SUNDAY MORNING THAT A MIX OF RAIN AND SNOW IS POSSIBLE NORTH OF THE MISSOURI RIVER. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
In the hours before
Local storm report, May 27, 6:39 PM MDT, 2 hours 22 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GLASGOW MT
639 PM MDT THU MAY 27 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0725 PM HAIL 12 NNE MCCLOUD 47.06N 105.47W
05/26/2010 E0.75 INCH PRAIRIE MT TRAINED SPOTTER
PENNY SIZED HAIL COVERED THE GROUND.
&&
RSMITHSpecial weather statement, May 27, 8:35 PM MDT, 26 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GLASGOW MT
835 PM MDT THU MAY 27 2010
MTZ019-280315-
SHERIDAN-
835 PM MDT THU MAY 27 2010
THE NATIONAL WEATHER SERVICE IN GLASGOW HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY FOR...
NORTHERN SHERIDAN COUNTY IN NORTHEAST MONTANA...
UNTIL 915 PM MDT.
AT 832 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR PORT OF RAYMOND...MOVING NORTH AT 25 MPH.
HAIL UP TO ONE-HALF INCH IN DIAMETER IS EXPECTED WITH THIS STORM...
ALONG WITH HEAVY RAIN.
LOCATIONS IN THE ADVISORY INCLUDE...
RURAL AREAS OF NORTHERN SHERIDAN COUNTY...
LAT...LON 4900 10434 4889 10450 4891 10472 4901 10465
4901 10434
TIME...MOT...LOC 0233Z 194DEG 23KT 4897 10458
SIMONSEN
WEATHER.GOV/GLASGOWThe office that day
Everything else NWS Glasgow, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 27, 8:34 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone, Prairie | 26 min |
| May 27, 8:35 PM MDT | Special Weather Statement | GGW | Sheridan | 40 min |
| May 27, 8:45 PM MDT | Severe Thunderstorm Warning | GGW | Sheridan | 30 min |
| May 27, 8:58 PM MDT | Severe Thunderstorm Warning | GGW | McCone, Prairie | 47 min |
| May 27, 9:25 PM MDT | Tornado Warning | GGW | Dawson, McCone, Prairie | 50 min |
| May 27, 9:29 PM MDT | Severe Thunderstorm Warning | GGW | McCone | 61 min |
| May 27, 9:57 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 23 min |
| May 27, 10:14 PM MDT | Tornado Warning | GGW | Dawson, Richland | 31 min |
| May 27, 10:27 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 63 min |
| May 27, 10:43 PM MDT | Severe Thunderstorm Warning | GGW | Daniels, Roosevelt, Valley | 62 min |
| May 27, 10:47 PM MDT | Tornado Warning | GGW | Garfield | 28 min |
| May 27, 10:55 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone | 64 min |
| May 27, 11:17 PM MDT | Severe Thunderstorm Warning | GGW | Daniels, Roosevelt, Valley | 58 min |
| May 27, 11:42 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone, Roosevelt | 63 min |
| May 27, 11:44 PM MDT | Special Weather Statement | GGW | Daniels | 61 min |
| May 28, 12:40 AM MDT | Severe Thunderstorm Warning | GGW | McCone, Roosevelt, Valley | 65 min |
| May 28, 1:05 AM MDT | Severe Thunderstorm Warning | GGW | Dawson, McCone, Richland, Roosevelt | 55 min |
| May 28, 1:18 AM MDT | Severe Thunderstorm Warning | GGW | Daniels, McCone, Roosevelt, Sheridan | 57 min |
| May 28, 1:51 AM MDT | Special Weather Statement | GGW | Roosevelt, Sheridan | 54 min |
| May 28, 2:06 AM MDT | Severe Thunderstorm Warning | GGW | Richland, Roosevelt, Sheridan | 39 min |
| May 28, 2:40 AM MDT | Severe Thunderstorm Warning | GGW | Roosevelt, Sheridan | 50 min |
| May 28, 6:03 AM MDT | Dense Fog Advisory | GGW | Dawson, Prairie, Richland, Wibaux | 4 hr |
| May 28, 10:04 AM MDT | Flash Flood Watch | GGW | Daniels, Dawson, McCone, Prairie, Richland, Roosevelt and 3 more | 18 hr |
Nearby
Tornado Warnings in Montana, 2010Every tornado warning in 2010Tornadoes in 2010
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.