Alert archive / North Dakota / Flash Flood Warnings in 2025
Flash Flood Warning 1, NWS Bismarck, ND
NWS Bismarck, ND issued this flash flood warning at Aug 5, 2025, 6:12 PM CDT for Dickey County, McIntosh County, North Dakota. It was in force for 6 hr. 5 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 5, 2025, 6:12 PM CDT (23:12 UTC)
- Expired
- Aug 6, 2025, 12:15 AM CDT
- In force
- 6 hr
- Issued by
- NWS Bismarck, ND
- Area
- Storm-based polygon
- Flood severity
- None
Counties Dickey County, ND, McIntosh County, ND
The radar
The Aberdeen radar (KABR), 92 km from the middle of the area, began a volume at 23:16 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
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 5, 6:25 PM CDT | FLASH FLOOD | 4 Ene Ashley, ND | Spotter reports widespread standing water in her yard, with 3 to 4 inches of rainfall estimated to have fallen over the past 45 minutes. |
| Aug 5, 6:30 PM CDT | FLASH FLOOD | 5 Ne Ashley, ND | 3.5 inches of rain so far. Water was reported to have filled all low lying areas, overflowing into other areas. |
| Aug 5, 6:35 PM CDT | RAIN 3 | 6 Ssw Kulm, ND | Trained spotter reports 3 inches of rainfall, with small pea-sized hail mixed in. Still raining. |
| Aug 5, 6:45 PM CDT | RAIN 6.19 | 12 Ssw Kulm, ND | North Dakota Agriculture Weather Network (NDAWN) rainfall report as of 1845 CDT. Still raining. |
| Aug 5, 10:05 PM CDT | RAIN 7.2 | 12 Ssw Kulm, ND | NDAWN Station Wirch 7NW. 24 hour rain total. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
Did it verify
Verified. The Iowa Environmental Mesonet's Cow matched 2 storm reports to this flash flood warning; the first came 13 minutes after it went out.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 12:00Z, 11.2 hours before the alert went out and 146 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
- 515 J/kg
- Mixed-layer CIN
- -199 J/kg
- Mixed-layer LCL
- 970 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 55 m²/s²
- 0-3 km storm-relative helicity
- 145 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
881
WGUS53 KBIS 052312
FFWBIS
NDC021-051-060215-
/O.NEW.KBIS.FF.W.0001.250805T2312Z-250806T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Bismarck ND
612 PM CDT Tue Aug 5 2025
The National Weather Service in Bismarck has issued a
* Flash Flood Warning for...
Northwestern Dickey County in southeastern North Dakota...
Northeastern McIntosh County in southeastern North Dakota...
* Until 915 PM CDT.
* At 612 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 2 and 4 inches of rain
have fallen. Flash flooding is ongoing or expected to begin
shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban
areas, highways, streets and underpasses as well as
other poor drainage and low-lying areas.
* Some locations that will experience flash flooding include...
Merricourt City and Merricourt.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 4627 9884 4628 9862 4612 9864 4605 9897
4601 9917 4606 9938 4610 9938 4627 9919
4628 9905
FLASH FLOOD...RADAR INDICATED
$$
Anglin3 follow-up statements
305
WGUS73 KBIS 060007
FFSBIS
Flash Flood Statement
National Weather Service Bismarck ND
707 PM CDT Tue Aug 5 2025
NDC021-051-060215-
/O.CON.KBIS.FF.W.0001.000000T0000Z-250806T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Dickey ND-McIntosh ND-
707 PM CDT Tue Aug 5 2025
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 915 PM CDT THIS
EVENING FOR NORTHWESTERN DICKEY AND NORTHEASTERN MCINTOSH COUNTIES...
At 707 PM CDT, Observation networks and trained weather spotters
have reported thunderstorms producing heavy rain across the warned
area. Between 3 and 7 inches of rain have fallen according to
observations. Flash flooding is ongoing and expected to continue.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Trained spotters and mesonet observations reported.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
Some locations that will experience flash flooding include...
Merricourt City and Merricourt, along with rural areas of eastern
McIntosh and western Dickey counties.
An additional one inch of rain is possible, with heavier rainfall
now east of the warned area.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 4627 9884 4628 9862 4612 9864 4605 9897
4601 9917 4606 9938 4610 9938 4627 9919
4628 9905
FLASH FLOOD...OBSERVED
$$
Heinert829
WGUS53 KBIS 060150
FFWBIS
NDC021-051-060515-
/O.EXT.KBIS.FF.W.0001.000000T0000Z-250806T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Bismarck ND
850 PM CDT Tue Aug 5 2025
The National Weather Service in Bismarck has extended the
* Flash Flood Warning for...
Northwestern Dickey County in southeastern North Dakota...
Northeastern McIntosh County in southeastern North Dakota...
* Until 1215 AM CDT.
* At 850 PM CDT, trained weather spotters reported thunderstorms
producing heavy rain across the warned area. Between 2 and 7
inches of rain have fallen. Flash flooding is ongoing or expected
to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Trained spotters reported.
IMPACT...Flash flooding of small creeks and streams, urban
areas, highways, streets and underpasses as well as
other poor drainage and low-lying areas.
* Some locations that will experience flash flooding include...
Merricourt City and Merricourt.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 4610 9938 4627 9919 4628 9905 4627 9884
4628 9862 4612 9864 4605 9897 4601 9917
4606 9938
FLASH FLOOD...OBSERVED
$$
Anglin485
WGUS73 KBIS 060513
FFSBIS
Flash Flood Statement
National Weather Service Bismarck ND
1213 AM CDT Wed Aug 6 2025
NDC021-051-060523-
/O.EXP.KBIS.FF.W.0001.000000T0000Z-250806T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Dickey ND-McIntosh ND-
1213 AM CDT Wed Aug 6 2025
...FLASH FLOOD WARNING WILL EXPIRE AT 1215 AM CDT EARLY THIS MORNING
FOR NORTHWESTERN DICKEY AND NORTHEASTERN MCINTOSH COUNTIES...
The Flash Flood Warning will be allowed to expire as the threat for
heavy rain has ended. However, a Flood Advisory remains in effect
until 915 AM CDT Wednesday morning. Please continue to heed
remaining road closures and avoid areas of high water.
&&
LAT...LON 4610 9938 4627 9919 4628 9905 4627 9884
4628 9862 4612 9864 4605 9897 4601 9917
4606 9938
$$
HollanWhat 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 Bismarck, ND wrote its last area forecast discussion before this flash flood warning went out at Aug 5, 2:21 PM CDT, 3 hours 51 minutes earlier. Its key messages:
- Isolated to scattered severe thunderstorms are possible today.
- Severe weather is possible again on Thursday, possibly lingering into eastern portions of the area into Friday.
- Quieter and seasonably cool weather expected for the upcoming weekend.
Area forecast discussion, Aug 5, 2:21 PM CDT, 3 hours 51 minutes before
Area Forecast Discussion National Weather Service Bismarck ND 221 PM CDT Tue Aug 5 2025 .KEY MESSAGES... - Isolated to scattered severe thunderstorms are possible today. - Severe weather is possible again on Thursday, possibly lingering into eastern portions of the area into Friday. - Quieter and seasonably cool weather expected for the upcoming weekend. && .DISCUSSION... Issued at 221 PM CDT Tue Aug 5 2025 Showers continue over parts of northwestern and north central North Dakota, while scattered sub-severe (though strong at times) thunderstorms continue to develop in south central ND. The big question remains as to what exactly will happen this afternoon. The RAP suggests plenty of instability at around 2000 to 3000 J/kg of MUCAPE near the ND/SD border with little CIN by mid- afternoon. However, with convection that passed through this morning, and continues at this time, stratus still covers much of the forecast area. So there definitely remains some question as to how much the environment can recover this afternoon, and just how widespread the severe weather threat will be. Based on current satellite imagery and forecast models, there seem to be two areas most likely to see more organized thunderstorm development today. The first is in northwestern ND, where skies have mostly cleared and isolated strong to severe thunderstorms are possible. The second, and probably the most favorable area for severe weather, is the south central, especially along and south of I94. The south central is where both skies have begun to clear and elevated mixed layer dewpoints at around 65 degrees are present. That said, definitely can't rule out development in the southwest either, or a few storms north of I94 becoming severe. Should additional organized thunderstorms develop this afternoon in the south central, adequate shear is progged with around 30 to 40 kts of 0 to 6 km bulk shear. Overall storm mode is favored to be more clustered, though a few discrete cells may develop during the afternoon. Combined with more than adequate shear and the potential for a few discrete cells, along with aforementioned 2000 to 3000 J/kg of MUCAPE, golf ball size hail, winds up to 70 mph, and a tornado or two remain the biggest threats. Once any thunderstorms clear out late this afternoon or evening, expect mostly dry conditions for the remainder of the night through Wednesday. There are low chances for shower and thunderstorm development in southwestern ND Wednesday evening, but severe weather seems unlikely at this time. Beyond Wednesday, severe thunderstorm potential returns both Thursday and Friday. On Thursday, elevated instability and increasing shear are progged in some model output. This could result in scattered severe thunderstorm development anywhere in the CWA. Models then agree that upper low pressure moves from west to east across south central Canada to end the week. A stronger trough off this low could produce additional severe weather on Friday, especially in southeastern parts of the forecast area. A gradual warming trend is expected through Thursday with highs forecast to reach the low 80s to low 90s. A cooldown is then favored to finish out the week with highs in the 70s possibly returning for much of the state. Lows will also return to the 50s for much of the area. && .AVIATION /18Z TAFS THROUGH 18Z WEDNESDAY/... Issued at 1256 PM CDT Tue Aug 5 2025 Isolated to scattered showers and thunderstorms are expected this afternoon and evening before ending from west to east tonight. Central and eastern parts of the state are those most likely to be impacted, with the southwest the least likely. Still, storms could develop anywhere in the state today. Large hail, erratic winds, and MVFR/IFR ceilings are possible with any storms that develop, especially in the south central. Further MVFR/IFR ceilings are currently present mainly in northern ND right now, with additional low ceilings expected later tonight over much of the eastern half of the state. && .BIS WATCHES/WARNINGS/ADVISORIES... None. && DISCUSSION...Telken AVIATION...Telken
Hazardous weather outlook, Aug 5, 2:22 PM CDT, 3 hours 50 minutes before
Hazardous Weather Outlook National Weather Service Bismarck ND 222 PM CDT Tue Aug 5 2025 NDZ010>013-018>023-025-032>037-040>048-050-051-061930- Mountrail-Ward-McHenry-Pierce-Dunn-Mercer-Oliver-McLean-Sheridan- Wells-Foster-Billings-Stark-Morton-Burleigh-Kidder-Stutsman-Slope- Hettinger-Grant-Bowman-Adams-Sioux-Emmons-Logan-La Moure-McIntosh- Dickey- 222 PM CDT Tue Aug 5 2025 /122 PM MDT Tue Aug 5 2025/ This Hazardous Weather Outlook is for portions of north central North Dakota, northwest North Dakota, south central North Dakota, southeast North Dakota, and southwest North Dakota. .DAY ONE...This Afternoon and Tonight Scattered severe thunderstorms are possible today. The primary threats are golf ball size hail, 70 mph wind gusts, and a tornado or two possible. .DAYS TWO THROUGH SEVEN...Wednesday through Monday Severe thunderstorms will be possible again on Thursday into Friday. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed this afternoon and evening. NDZ001>005-009-017-031-061930- Divide-Burke-Renville-Bottineau-Rolette-Williams-McKenzie- Golden Valley- 222 PM CDT Tue Aug 5 2025 /122 PM MDT Tue Aug 5 2025/ This Hazardous Weather Outlook is for portions of north central North Dakota, northwest North Dakota, and southwest North Dakota. .DAY ONE...This Afternoon and Tonight Isolated severe thunderstorms are possible today. The primary threats are quarter size hail and 60 mph wind gusts. .DAYS TWO THROUGH SEVEN...Wednesday through Monday Severe thunderstorms will be possible again on Thursday. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed this afternoon and evening. Telken
In the hours before
Special weather statement, Aug 5, 1:25 PM CDT, 4 hours 47 minutes before
Special Weather Statement
National Weather Service Bismarck ND
125 PM CDT Tue Aug 5 2025
NDZ020-021-035-051900-
Oliver ND-McLean ND-Burleigh ND-
125 PM CDT Tue Aug 5 2025
...A STRONG THUNDERSTORM WILL IMPACT SOUTHEASTERN MCLEAN...WEST
CENTRAL BURLEIGH AND EASTERN OLIVER COUNTIES THROUGH 200 PM CDT...
At 125 PM CDT, Doppler radar was tracking a strong thunderstorm 7
miles east of Center, or 22 miles northwest of Mandan, moving
northeast at 20 mph.
HAZARD...Wind gusts up to 40 mph and penny size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
Locations impacted include...
Washburn, Sanger, Hensler, Cross Ranch State Park, Price, and Nelson
Lake.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4700 10113 4708 10123 4717 10121 4729 10107
4729 10089 4717 10081 4707 10091
TIME...MOT...LOC 1825Z 224DEG 16KT 4711 10114
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...40 MPH
HAMILTONSpecial weather statement, Aug 5, 3:24 PM CDT, 2 hours 48 minutes before
Special Weather Statement
National Weather Service Bismarck ND
324 PM CDT Tue Aug 5 2025
NDZ021-022-052100-
McLean ND-Sheridan ND-
324 PM CDT Tue Aug 5 2025
...STRONG THUNDERSTORMS WILL IMPACT SOUTHWESTERN SHERIDAN AND EAST
CENTRAL MCLEAN COUNTIES THROUGH 400 PM CDT...
At 323 PM CDT, Doppler radar was tracking a cluster of strong
thunderstorms near Mercer, or 38 miles east of Garrison, moving north
at 20 mph.
HAZARD...Wind gusts up to 50 mph and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
Locations impacted include...
Mcclusky, Mercer, and Hoffer Lake.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4737 10063 4742 10082 4763 10081 4764 10056
4756 10028
TIME...MOT...LOC 2023Z 193DEG 19KT 4747 10065
MAX HAIL SIZE...0.88 IN
MAX WIND GUST...50 MPH
HAMILTONLocal storm report, Aug 5, 3:36 PM CDT, 2 hours 36 minutes before
Preliminary Local Storm Report
National Weather Service Bismarck ND
336 PM CDT Tue Aug 5 2025
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0308 PM Tstm Wnd Gst 5 SSE Mercer 47.42N 100.67W
08/05/2025 M60 MPH Sheridan ND Mesonet
NDAWN 10 meter wind gust to 60 mph.
&&
twhLocal storm report, Aug 5, 5:37 PM CDT, 35 minutes before
Preliminary Local Storm Report
National Weather Service Bismarck ND
537 PM CDT Tue Aug 5 2025
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0536 PM Hail 5 NE Ashley 46.08N 99.29W
08/05/2025 E0.50 Inch McIntosh ND Trained Spotter
A lot of half inch hail. Rainfall of 1.75
inches so far.
&&
JAASpecial weather statement, Aug 5, 5:58 PM CDT, 14 minutes before
Special Weather Statement
National Weather Service Bismarck ND
558 PM CDT Tue Aug 5 2025
NDZ037-052330-
Stutsman ND-
558 PM CDT Tue Aug 5 2025
...A STRONG THUNDERSTORM WILL IMPACT NORTHERN STUTSMAN COUNTY THROUGH
630 PM CDT...
At 558 PM CDT, Doppler radar was tracking a strong thunderstorm 10
miles southeast of Woodworth, or 22 miles northwest of Jamestown,
moving east at 25 mph.
HAZARD...Wind gusts up to 50 mph and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
Locations impacted include...
Buchanan and Pingree.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.
A Tornado Watch remains in effect until 1000 PM CDT for southeastern
North Dakota.
&&
LAT...LON 4700 9919 4713 9926 4729 9876 4719 9862
4697 9866
TIME...MOT...LOC 2258Z 254DEG 21KT 4707 9912
MAX HAIL SIZE...0.88 IN
MAX WIND GUST...50 MPH
HEINERTThe office that day
Everything else NWS Bismarck, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 4, 7:10 PM CDT | Special Weather Statement | BIS | Emmons | 35 min |
| Aug 5, 3:35 AM CDT | Special Weather Statement | BIS | Adams | 25 min |
| Aug 5, 3:59 AM CDT | Special Weather Statement | BIS | Hettinger | 31 min |
| Aug 5, 4:49 AM CDT | Special Weather Statement | BIS | Hettinger | 26 min |
| Aug 5, 5:14 AM CDT | Special Weather Statement | BIS | Hettinger | 31 min |
| Aug 5, 5:33 AM CDT | Special Weather Statement | BIS | Sioux | 27 min |
| Aug 5, 5:39 AM CDT | Severe Thunderstorm Warning | BIS | Hettinger, Stark | 51 min |
| Aug 5, 6:32 AM CDT | Areal Flood Advisory | BIS | Stark | 3 hr |
| Aug 5, 6:38 AM CDT | Special Weather Statement | BIS | Dunn | 37 min |
| Aug 5, 7:00 AM CDT | Special Weather Statement | BIS | Morton | 30 min |
| Aug 5, 7:17 AM CDT | Severe Thunderstorm Warning | BIS | Grant, Mercer, Morton, Oliver | 45 min |
| Aug 5, 8:18 AM CDT | Special Weather Statement | BIS | Morton, Sioux | 27 min |
| Aug 5, 8:44 AM CDT | Special Weather Statement | BIS | Emmons, Morton, Sioux | 31 min |
| Aug 5, 9:14 AM CDT | Special Weather Statement | BIS | Burleigh | 31 min |
| Aug 5, 9:30 AM CDT | Special Weather Statement | BIS | Emmons | 30 min |
| Aug 5, 9:59 AM CDT | Special Weather Statement | BIS | Emmons | 31 min |
| Aug 5, 11:30 AM CDT | Special Weather Statement | BIS | Emmons | 30 min |
| Aug 5, 1:25 PM CDT | Special Weather Statement | BIS | Oliver | 35 min |
| Aug 5, 3:24 PM CDT | Special Weather Statement | BIS | Sheridan | 36 min |
| Aug 5, 3:56 PM CDT | Severe Thunderstorm Warning | BIS | Kidder | 49 min |
| Aug 5, 4:02 PM CDT | Severe Thunderstorm Warning | BIS | Sheridan | 46 min |
| Aug 5, 4:25 PM CDT | Severe Thunderstorm Warning | BIS | LaMoure, Logan, McIntosh | 65 min |
| Aug 5, 4:39 PM CDT | Severe Thunderstorm Warning | BIS | Dickey, LaMoure, McIntosh | 51 min |
| Aug 5, 4:44 PM CDT | Severe Thunderstorm Warning | BIS | Kidder, Stutsman | 61 min |
| Aug 5, 4:46 PM CDT | Severe Thunderstorm Warning | BIS | Dickey | 59 min |
| Aug 5, 5:34 PM CDT | Severe Thunderstorm Warning | BIS | Dickey, LaMoure, Logan, McIntosh | 41 min |
| Aug 5, 5:43 PM CDT | Tornado Warning | BIS | Dickey, McIntosh | 32 min |
| Aug 5, 5:58 PM CDT | Special Weather Statement | BIS | Stutsman | 32 min |
| Aug 5, 6:02 PM CDT | Tornado Warning | BIS | Dickey, McIntosh | 28 min |
| Aug 5, 6:12 PM CDT | Severe Thunderstorm Warning | BIS | Dickey, McIntosh | 63 min |
| Aug 5, 6:23 PM CDT | Tornado Warning | BIS | Dickey | 24 min |
| Aug 5, 6:38 PM CDT | Severe Thunderstorm Warning | BIS | Dickey | 67 min |
Nearby
Flash Flood Warnings in North Dakota, 2025Every flash flood warning in 2025
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.