Alert archive / Minnesota / Flash Flood Warnings in 2019
Flash Flood Warning 9, NWS Grand Forks, ND
NWS Grand Forks, ND issued this flash flood warning at Sep 20, 2019, 10:59 PM CDT for Polk County, Minnesota; Grand Forks County, North Dakota. It was in force for 8 hr. 11 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
- Sep 20, 2019, 10:59 PM CDT (03:59 UTC)
- Expired
- Sep 21, 2019, 7:00 AM CDT
- In force
- 8 hr
- Issued by
- NWS Grand Forks, ND
- Area
- Storm-based polygon
- Flood severity
- None
Counties Polk County, MN, Grand Forks County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 56 km from the middle of the area, began a volume at 04:00 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 |
|---|---|---|---|
| Sep 20, 11:58 PM CDT | FLASH FLOOD | 1 Nw Grand Forks, ND | UNIVERSITY OF NORTH DAKOTA POLICE REPORT UNIVERSITY AVENUE FROM COLUMBIA ROAD TO NORTH 42ND STREET IS TEMPORARILY CLOSED DUE TO FLOODED STREETS |
| Sep 21, 12:00 AM CDT | HEAVY RAIN 3.59 | 3 S Grand Forks, ND | RAINFALL TOTAL FROM SEPTEMBER 20 2019 |
| Sep 21, 1:00 AM CDT | HEAVY RAIN 3.63 | Grand Forks Afb, ND | 3.79 INCHES MEASURED FROM 7 PM TO 1 AM CDT. STILL RAINING AT OBSERVATION TIME. |
| Sep 21, 1:00 AM CDT | HEAVY RAIN 4.73 | 1 Wnw Grand Forks, ND | 4.73 INCHES FROM 7 PM TO 1 AM CDT. STILL RAINING AT OBSERVATION TIME. |
| Sep 21, 1:30 AM CDT | FLASH FLOOD | 1 Sse Grand Forks, ND | AROUND A DOZEN CARS STALLED IN APPROXIMATELY ANKLE TO KNEE DEEP WATER ALONG MAIN ROADS FROM COLUMBIA RD/13TH AVE TO 20TH ST/32ND AVE IN THE CITY OF GRAND FORKS |
| Sep 21, 3:34 AM CDT | HEAVY RAIN 6.37 | 2 E Grand Forks, ND | STORM TOTAL ACCUMULATION VIA RAIN GAUGE PICTURE ON SOCIAL MEDIA |
| Sep 21, 5:25 AM CDT | FLASH FLOOD | Grand Forks, ND | INTERSTATE 29 CLOSED BETWEEN EXITS 141 AND 145 DUE TO FLOODING NORTH OF HIGHWAY 2 AT GRAND FORKS. TRAFFIC SHIFTED TO OTHER ROUTES. |
| Sep 21, 7:00 AM CDT | HEAVY RAIN 4.07 | 4 Sse Grand Forks, ND | COCORAHS STATION ND-GF-13 GRAND FORKS ND 3.7 SSE. |
| Sep 21, 7:00 AM CDT | HEAVY RAIN 4.9 | 3 Sse Grand Forks, ND | COCORAHS STATION ND-GF-14 GRAND FORKS ND 3.4 SSE. |
| Sep 21, 7:00 AM CDT | HEAVY RAIN 5.05 | 2 Se Grand Forks, ND | COCORAHS STATION ND-GF-8 GRAND FORKS ND 2.5 SE. |
| Sep 21, 7:00 AM CDT | HEAVY RAIN 5.29 | 1 Wsw Grand Forks, ND | OFFICIAL NWS MEASUREMENT OF 24 HR RAINFALL ENDED 700 AM CDT. LIGHT RAIN STILL OCCURRING AT THAT TIME. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
International Fa, MN (KINL), launched 00:00Z, 4.0 hours before the alert went out and 280 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
- 635 J/kg
- Mixed-layer CIN
- -153 J/kg
- Mixed-layer LCL
- 1044 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 134 m²/s²
- 0-3 km storm-relative helicity
- 144 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 7.3
The text
As transmitted.
789 WGUS53 KFGF 210359 FFWFGF MNC119-NDC035-210730- /O.NEW.KFGF.FF.W.0009.190921T0359Z-190921T0730Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED Flash Flood Warning National Weather Service Grand Forks ND 1059 PM CDT Fri Sep 20 2019 The National Weather Service in Grand Forks has issued a * Flash Flood Warning for... Northwestern Polk County in northwestern Minnesota... Eastern Grand Forks County in northeastern North Dakota... * Until 230 AM CDT. * At 1057 PM CDT, Doppler radar indicated thunderstorms producing heavy rain over eastern Grand Forks and northwest Polk counties. Several rounds of thunderstorms have already passed through these areas. Therefore flash flooding is expected, especially in the Grand Forks and East Grand Forks areas. * Some locations that will experience flooding include... Grand Forks, East Grand Forks, Thompson, Fisher, Emerado, Manvel and Reynolds. This includes Interstate 29 between mile markers 123 and 159. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. && LAT...LON 4817 9672 4767 9670 4767 9738 4817 9738 $$
2 follow-up statements
765 WGUS53 KFGF 210700 FFWFGF MNC119-NDC035-211200- /O.EXT.KFGF.FF.W.0009.000000T0000Z-190921T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED Flash Flood Warning National Weather Service Grand Forks ND 200 AM CDT Sat Sep 21 2019 The National Weather Service in Grand Forks has extended the * Flash Flood Warning for... Northwestern Polk County in northwestern Minnesota... Eastern Grand Forks County in northeastern North Dakota... * Until 700 AM CDT. * At 159 AM CDT, trained weather spotters reported flash flooding across the warned area. Many streets are underwater and water is flooding yards and approaching homes in parts of Grand Forks and East Grand Forks. Over 4 inches of rain fell due to slow moving thunderstorms late Friday evening into the early morning hours Saturday. Flash flooding is already occurring. * Some locations that will experience flooding include... Grand Forks, East Grand Forks, Thompson, Fisher, Emerado, Manvel and Reynolds. This includes Interstate 29 between mile markers 123 and 159. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be especially cautious at night when it is harder to recognize the dangers of flooding. Excessive runoff from heavy rainfall will cause flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other drainage areas and low lying spots. && LAT...LON 4817 9672 4767 9670 4767 9738 4817 9738 $$ DJR
338 WGUS73 KFGF 211144 FFSFGF Flash Flood Statement National Weather Service Grand Forks ND 644 AM CDT Sat Sep 21 2019 MNC119-NDC035-211200- /O.CON.KFGF.FF.W.0009.000000T0000Z-190921T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Polk MN-Grand Forks ND- 644 AM CDT Sat Sep 21 2019 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 700 AM CDT FOR NORTHWESTERN POLK AND EASTERN GRAND FORKS COUNTIES... At 642 AM CDT, thunderstorms with heavy rain continued across the Grand Forks and Polk county areas. This warning will likely be replaced soon with an areal flood warning. Some locations that will experience flooding include... Grand Forks, East Grand Forks, Thompson, Fisher, Emerado, Manvel and Reynolds. This includes Interstate 29 between mile markers 123 and 159. 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. Excessive runoff from heavy rainfall will cause flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other drainage areas and low lying spots. && LAT...LON 4817 9672 4767 9670 4767 9738 4817 9738 $$ VG
The office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 20, 7:26 PM CDT | Flash Flood Watch | FGF | Beltrami, Kittson, Lake of the Woods, Marshall, Pennington, Polk and 2 more | 8 hr |
| Sep 20, 7:33 PM CDT | Severe Thunderstorm Warning | FGF | Polk | 57 min |
| Sep 20, 7:57 PM CDT | Severe Thunderstorm Warning | FGF | Clay, Norman, Polk | 63 min |
| Sep 20, 8:05 PM CDT | Severe Thunderstorm Warning | FGF | Marshall, Polk | 55 min |
| Sep 20, 8:22 PM CDT | Severe Thunderstorm Warning | FGF | Kittson, Marshall, Roseau | 38 min |
| Sep 20, 8:28 PM CDT | Severe Thunderstorm Warning | FGF | Marshall, Pennington, Polk, Red Lake | 47 min |
| Sep 20, 8:45 PM CDT | Severe Thunderstorm Warning | FGF | Kittson, Marshall, Polk, Roseau | 45 min |
| Sep 20, 8:55 PM CDT | Severe Thunderstorm Warning | FGF | Norman, Polk | 65 min |
| Sep 20, 9:00 PM CDT | Tornado Warning | FGF | Norman, Polk | 23 min |
| Sep 20, 9:01 PM CDT | Special Weather Statement | FGF | Kittson | 29 min |
| Sep 20, 9:12 PM CDT | Severe Thunderstorm Warning | FGF | Marshall, Pennington, Polk, Red Lake | 48 min |
| Sep 20, 9:27 PM CDT | Severe Thunderstorm Warning | FGF | Kittson, Marshall, Roseau | 48 min |
| Sep 20, 9:27 PM CDT | Severe Thunderstorm Warning | FGF | Kittson, Marshall, Roseau | 3 min |
| Sep 20, 9:53 PM CDT | Flash Flood Warning | FGF | Roseau | 2 hr |
| Sep 20, 9:55 PM CDT | Severe Thunderstorm Warning | FGF | Marshall, Pennington, Polk, Red Lake | 50 min |
| Sep 20, 10:11 PM CDT | Severe Thunderstorm Warning | FGF | Beltrami, Lake of the Woods, Marshall, Pennington, Roseau | 64 min |
| Sep 20, 11:03 PM CDT | Special Weather Statement | FGF | Pennington | 27 min |
| Sep 20, 11:25 PM CDT | Areal Flood Warning | FGF | Kittson | 10 hr |
| Sep 20, 11:39 PM CDT | Flash Flood Warning | FGF | Beltrami, Marshall, Pennington, Polk, Red Lake, Roseau | 7 hr |
| Sep 21, 12:18 AM CDT | Areal Flood Warning | FGF | Kittson, Lake of the Woods, Marshall, Roseau | 15 hr |
| Sep 21, 2:54 AM CDT | Flash Flood Warning | FGF | Norman, Polk, Red Lake | 4 hr |
| Sep 21, 6:58 AM CDT | Areal Flood Warning | FGF | Beltrami, Marshall, Norman, Pennington, Polk, Red Lake | 9 hr |
| Sep 21, 9:47 AM CDT | River Flood Warning | FGF | Marshall | 4 days |
| Sep 21, 9:47 AM CDT | River Flood Warning | FGF | Kittson | 4 days |
| Sep 21, 9:47 AM CDT | River Flood Warning | FGF | Roseau | 5 days |
| Sep 21, 11:37 AM CDT | River Flood Warning | FGF | Marshall | 46 hr |
| Sep 21, 3:29 PM CDT | Areal Flood Warning | FGF | Kittson, Lake of the Woods, Marshall, Roseau | 18 hr |
| Sep 21, 3:46 PM CDT | Areal Flood Warning | FGF | Pennington, Polk, Red Lake | 17 hr |
| Sep 21, 3:55 PM CDT | Severe Thunderstorm Warning | FGF | Polk | 37 min |
| Sep 21, 4:34 PM CDT | Special Weather Statement | FGF | Polk | 56 min |
| Sep 21, 5:19 PM CDT | Severe Thunderstorm Warning | FGF | Clay | 41 min |
| Sep 21, 5:27 PM CDT | Special Weather Statement | FGF | Polk | 33 min |
| Sep 21, 5:56 PM CDT | Special Weather Statement | FGF | Clearwater | 64 min |
| Sep 21, 5:58 PM CDT | Severe Thunderstorm Warning | FGF | Becker, Clay, Mahnomen, Norman | 62 min |
| Sep 21, 6:51 PM CDT | Severe Thunderstorm Warning | FGF | Beltrami, Clearwater | 54 min |
| Sep 21, 6:53 PM CDT | Severe Thunderstorm Warning | FGF | Becker, Beltrami, Clearwater, Hubbard, Mahnomen | 67 min |
| Sep 20, 7:00 PM CDT | Flash Flood Warning | FGF | Cavalier, Pembina | 3 hr |
| Sep 20, 7:03 PM CDT | Severe Thunderstorm Warning | FGF | Cass, Traill | 57 min |
| Sep 20, 7:14 PM CDT | Special Weather Statement | FGF | Ramsey | 61 min |
| Sep 20, 7:14 PM CDT | Tornado Warning | FGF | Cass | 31 min |
| Sep 20, 7:17 PM CDT | Special Weather Statement | FGF | Cavalier | 58 min |
| Sep 20, 7:21 PM CDT | Special Weather Statement | FGF | Eddy, Nelson | 24 min |
| Sep 20, 7:39 PM CDT | Tornado Warning | FGF | Cass | 36 min |
| Sep 20, 8:06 PM CDT | Special Weather Statement | FGF | Nelson, Walsh | 24 min |
| Sep 20, 8:09 PM CDT | Special Weather Statement | FGF | Pembina | 66 min |
| Sep 20, 8:36 PM CDT | Tornado Warning | FGF | Cass, Traill | 24 min |
| Sep 20, 9:26 PM CDT | Areal Flood Advisory | FGF | Cass, Traill | 3 hr |
| Sep 20, 9:51 PM CDT | Special Weather Statement | FGF | Grand Forks, Steele | 39 min |
| Sep 20, 10:37 PM CDT | Flash Flood Warning | FGF | Eddy, Griggs, Nelson, Steele | 8 hr |
| Sep 20, 11:33 PM CDT | Flash Flood Warning | FGF | Grand Forks, Nelson | 7 hr |
| Sep 21, 12:29 AM CDT | Flash Flood Warning | FGF | Barnes, Grand Forks, Griggs, Steele, Traill | 7 hr |
| Sep 21, 12:51 AM CDT | Areal Flood Warning | FGF | Benson, Cavalier, Eddy, Nelson, Pembina, Ramsey and 2 more | 7 hr |
| Sep 21, 8:11 AM CDT | Areal Flood Warning | FGF | Benson, Cavalier, Eddy, Nelson, Pembina, Ramsey and 2 more | 8 hr |
| Sep 21, 3:07 PM CDT | Special Weather Statement | FGF | Steele | 38 min |
| Sep 21, 3:43 PM CDT | Special Weather Statement | FGF | Steele, Traill | 47 min |
| Sep 21, 4:15 PM CDT | Special Weather Statement | FGF | Cass | 60 min |
Nearby
Flash Flood Warnings in Minnesota, 2019Flash Flood Warnings in North Dakota, 2019Every flash flood warning in 2019
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.