Alert archive / Montana / Flash Flood Warnings in 2013

Flash Flood Warning 16, NWS Glasgow, MT

July 8, 2013Dawson County, Montana

NWS Glasgow, MT issued this flash flood warning at Jul 8, 2013, 5:50 PM MDT for Dawson County, Montana. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 8, 2013, 5:50 PM MDT (23:50 UTC)
Expired: Jul 8, 2013, 8:45 PM MDT
In force: 3 hr
Issued by: NWS Glasgow, MT
Area: Storm-based polygon
Flood severity: None

County Dawson County, MT

The radar

The Glasgow radar (KGGW), 166 km from the middle of the area, began a volume at 23:53 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 nearest sounding before it

Glasgow Intl Airport, MT (KGGW), launched 12:00Z, 11.8 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.

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: 467 J/kg
Mixed-layer CIN: -141 J/kg
Mixed-layer LCL: 1005 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: -26 m²/s²
0-3 km storm-relative helicity: 30 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -1.5

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood 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 flash flood warning went out at Jul 8, 4:30 PM MDT, 1 hour 20 minutes earlier.

Area forecast discussion, Jul 8, 4:30 PM MDT, 1 hour 20 minutes before

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Hazardous weather outlook, Jul 8, 3:08 AM MDT, 14 hours 42 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GLASGOW MT
308 AM MDT MON JUL 8 2013

MTZ016>027-059>062-091000-
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-
308 AM MDT MON JUL 8 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHEAST
MONTANA.

.DAY ONE...TODAY AND TONIGHT

STRONG TO SEVERE THUNDERSTORMS ARE POSSIBLE FROM LATE THIS
AFTERNOON THROUGH THE EVENING HOURS. LARGE HAIL... HIGH WINDS IN
EXCESS OF 70 MPH AND HEAVY RAIN IS POSSIBLE WITH ANY OF THESE
STORMS AS THEY PASS THROUGH.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

In the hours before

Local storm report, Jul 8, 3:34 PM MDT, 2 hours 16 minutes before

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Local storm report, Jul 8, 4:46 PM MDT, 1 hour 4 minutes before

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Local storm report, Jul 8, 5:20 PM MDT, 30 minutes before

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Local storm report, Jul 8, 5:32 PM MDT, 18 minutes before

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Local storm report, Jul 8, 5:36 PM MDT, 14 minutes before

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Local storm report, Jul 8, 5:49 PM MDT, 1 minute before

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      </p>
      <p id="message2">
        Please try again in a few minutes.
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 7, 8:10 PM MDT	Severe Thunderstorm Warning	GGW	Phillips, Valley	50 min
Jul 7, 8:54 PM MDT	Special Weather Statement	GGW	Valley	66 min
Jul 7, 9:13 PM MDT	Severe Thunderstorm Warning	GGW	Valley	62 min
Jul 7, 10:12 PM MDT	Severe Thunderstorm Warning	GGW	Valley	48 min
Jul 7, 10:55 PM MDT	Special Weather Statement	GGW	Valley	65 min
Jul 8, 12:19 AM MDT	Severe Thunderstorm Warning	GGW	McCone, Roosevelt	26 min
Jul 8, 12:41 AM MDT	Special Weather Statement	GGW	Roosevelt	64 min
Jul 8, 1:57 AM MDT	Areal Flood Advisory	GGW	McCone, Richland, Roosevelt	3 hr
Jul 8, 12:26 PM MDT	Special Weather Statement	GGW	Phillips	64 min
Jul 8, 1:17 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Phillips, Valley	58 min
Jul 8, 2:10 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Valley	65 min
Jul 8, 3:11 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, McCone	64 min
Jul 8, 4:01 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Petroleum	59 min
Jul 8, 4:10 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, McCone, Prairie	65 min
Jul 8, 4:29 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, McCone, Richland	61 min
Jul 8, 5:09 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, Prairie	66 min
Jul 8, 5:23 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, Richland, Wibaux	52 min

Nearby

Flash Flood Warnings in Montana, 2013 Every flash flood warning in 2013

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.