Alert archive / Montana / Flash Flood Warnings in 2001

Flash Flood Warning 16, NWS Billings, MT

July 15, 2001Treasure County, Montana

NWS Billings, MT issued this flash flood warning at Jul 15, 2001, 3:17 PM MDT for Treasure 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 15, 2001, 3:17 PM MDT (21:17 UTC)
Expired: Jul 15, 2001, 6:15 PM MDT
In force: 3 hr
Issued by: NWS Billings, MT
Area: Whole counties

County Treasure County, MT

The radar

The Billings radar (KBLX), 110 km from the middle of the area, began a volume at 21:18 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, 9.3 hours before the alert went out and 229 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: 429 J/kg
Mixed-layer CIN: -191 J/kg
Mixed-layer LCL: 1665 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 82 m²/s²
0-3 km storm-relative helicity: 120 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WGUS55 KBYZ 152117
FFWBIL
FFWBIL
MTC103-160015-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BILLINGS MT
317 PM MDT SUN JUL 15 2001

THE NATIONAL WEATHER SERVICE IN BILLINGS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHERN TREASURE COUNTY IN SOUTHEAST MONTANA

* UNTIL 615 PM MDT

* AT 316 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  THUNDERSTORMS WITH VERY HEAVY RAIN 5 MILES SOUTH OF HYSHAM.

* BILLINGS RADAR ESTIMATES 3 TO 4 INCHES OF RAIN HAS FALLEN OVER 
SOUTHERN TREASURE COUNTY IN THE LAST HOUR.

SMALL CREEKS AND STREAMS WILL RAPIDLY FLOOD IN THE WARNED AREA...
POSSIBLY WASHING OUT ROADS AND FLOODING NEARBLY LOW AREAS.

A SEVERE THUNDERSTORM WATCH IS ALSO IN EFFECT UNTIL 8 PM.

$$

LAT...LON 4630 10708 4629 10743 4597 10742 4597 10717
          4588 10704 4588 10694 4614 10694 4615 10701
          4630 10701

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 Billings, MT wrote its last area forecast discussion before this flash flood warning went out at Jul 15, 2:30 PM MDT, 47 minutes earlier.

Area forecast discussion, Jul 15, 2:30 PM MDT, 47 minutes before

SOUTH CENTRAL AND SOUTHEAST MONTANA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BILLINGS MT
230 PM MDT SUN JUL 15 2001

.MON AND TUE...
WAVE PUSHES NORTH THROUGH AREA TONIGHT FOR MAINLY EVENING
THUNDERSTORMS.

MONDAY...UPPER LOW MOVES ONTO PACIFIC NORTHWEST COAST. SURFACE LOW
DEVELOPS IN RESPONSE OVER SOUTHWEST MONTANA..WITH SOUTH TO SOUTHEAST
LOW LEVEL FLOW OVER EASTERN MONTANA. POSSIBILITY OF A WAVE IN SOUTHWEST
FLOW INTERACTING WITH THE SURFACE LOW FOR SCATTERED POPS. MOISTURE
NOT AS MOIST AS LAST FEW DAYS WITH SUBTROPICAL MOISTURE GETTING SHUNTED
TO THE EAST.

TUESDAY...MID LEVEL FLOW BECOMES MORE CONFLUENT AS UPPER LOW MOVES
CLOSER TO AREA. THICKNESS DON'T DROP TOO MUCH...BUT SHOULD BE SLIGHTLY
COOLER. SURFACE TROUGH EDGES TO THE EAST FOR CONTINUED CHANCE OF
THUNDERSTORMS...BUT NOT AS GOOD AS MAIN ENERGY CONTINUES TO SHIFT TO
THE EAST INTO THE PLAINS.

.WED...THU...FRI...SAT...SUN...
UPPER LOW SLOWLY LUMBERS ACROSS THE SOUTHERN CANADA THROUGH THURSDAY.
EXTENDED MODELS PRETTY CONSISTENT ON THIS WILL SOME SMALL DIFFERENCES IN
TIMING. OVERALL TREND OF SOUTHWEST FLOW CONTINUING DAYS 3-5 LOOKS GOOD.
THE UPPER TROUGH PUSHES EAST ON SATURDAY AS ANOTHER UPPER LOW FORMS OFF
THE PACIFIC NORTHWEST COAST. THE ECMWF IN WEAKER AND FARTHER EAST WITH
THIS LOW. THE MRF BUILDS A SMALL SCALE RIDGE OVER FORECAST AREA IN
RESPONSE TO UPPER LOW FORMING. THIS RIDGE TO HOLD IN PLACE OVER THE
WEEKEND. WILL KEEP CONVECTION IN THROUGH FRIDAY AND GO MAINLY DRY OVER
THE WEEKEND. HUMPHREY

    MON     TUE     WED     THU     FRI     SAT     SUN
-----------------------------------------------------------
BIL 060/087 059/084 060/083 060/085 060/085 060/088 062/092
    43/T    32/T    33/T    33/T    33/T    22/B    11/B
LVM 055/085 055/081 056/081 056/083 056/083 058/087 058/091
    34/T    42/T    33/T    33/T    33/T    22/B    11/B
HDN 058/089 057/087 059/085 059/087 059/087 059/089 060/093
    43/T    32/T    33/T    33/T    33/T    22/B    11/B
MLS 065/092 065/088 064/087 064/087 062/087 062/089 062/093
    33/T    32/T    33/T    33/T    33/T    22/B    11/B
4BQ 064/091 064/087 064/086 064/086 062/086 062/088 062/092
    33/T    32/T    33/T    33/T    33/T    22/B    11/B
BHK 063/090 063/086 062/085 062/085 060/085 060/087 060/091
    33/T    32/T    33/T    33/T    33/T    22/B    11/B
SHR 055/087 055/084 056/083 056/085 056/085 058/088 058/092
    43/T    32/T    33/T    33/T    33/T    22/B    11/B

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 14, 6:56 PM MDT	Flash Flood Warning	BYZ	Carbon	2 hr
Jul 14, 7:00 PM MDT	Flash Flood Warning	BYZ	Yellowstone	2 hr
Jul 14, 7:21 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn	54 min
Jul 14, 7:49 PM MDT	Severe Thunderstorm Warning	BYZ	Rosebud	56 min
Jul 14, 8:20 PM MDT	Flash Flood Warning	BYZ	Big Horn	115 min
Jul 14, 8:29 PM MDT	Severe Thunderstorm Warning	BYZ	Custer	61 min
Jul 14, 11:13 PM MDT	Flash Flood Warning	BYZ	Carter	2 hr
Jul 15, 3:31 PM MDT	Severe Thunderstorm Warning	BYZ	Treasure	59 min
Jul 15, 4:44 PM MDT	Severe Thunderstorm Warning	BYZ	Powder River	61 min
Jul 15, 5:31 PM MDT	Severe Thunderstorm Warning	BYZ	Carter	59 min
Jul 15, 5:44 PM MDT	Severe Thunderstorm Warning	BYZ	Carter	61 min

Nearby

Flash Flood Warnings in Montana, 2001 Every flash flood 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.