Alert archive / Minnesota / Flash Flood Warnings in 2024
Flash Flood Warning 9, NWS Twin Cities, MN
NWS Twin Cities, MN issued this flash flood warning at Jul 21, 2024, 10:46 AM CDT for Dakota County, Hennepin County, Ramsey County, Minnesota. It was in force for 84 min. 1 report 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
- Jul 21, 2024, 10:46 AM CDT (15:46 UTC)
- Expired
- Jul 21, 2024, 12:10 PM CDT
- In force
- 84 min
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
- Flood severity
- None
Counties Dakota County, MN, Hennepin County, MN, Ramsey County, MN
The radar
The Minneapolis radar (KMPX), 36 km from the middle of the area, began a volume at 15:47 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 |
|---|---|---|---|
| Jul 21, 10:46 AM CDT | FLASH FLOOD | 1 Nw Lilydale, MN | MN DOT webcam shows I35E at Shepard road flooded with one car stranded in the flood water. Other cars using entrance ramp to get around flood water with regular traffic lanes all underwater. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 3.8 hours before the alert went out and 39 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
- 882 J/kg
- Mixed-layer CIN
- -40 J/kg
- Mixed-layer LCL
- 918 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 14 m²/s²
- 0-3 km storm-relative helicity
- 11 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
023
WGUS53 KMPX 211546
FFWMPX
MNC037-053-123-211745-
/O.NEW.KMPX.FF.W.0009.240721T1546Z-240721T1745Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Twin Cities/Chanhassen MN
1046 AM CDT Sun Jul 21 2024
The National Weather Service in the Twin Cities has issued a
* Flash Flood Warning for...
Northwestern Dakota County in east central Minnesota...
Southeastern Hennepin County in east central Minnesota...
Southern Ramsey County in east central Minnesota...
* Until 1245 PM CDT.
* At 1046 AM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 2 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.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 4495 9321 4504 9321 4503 9298 4492 9298
4489 9301 4489 9302 4488 9302 4487 9301
4484 9304 4477 9322 4480 9329 4492 9329
FLASH FLOOD...RADAR INDICATED
$$
CTG2 follow-up statements
932
WGUS73 KMPX 211644
FFSMPX
Flash Flood Statement
National Weather Service Twin Cities/Chanhassen MN
1144 AM CDT Sun Jul 21 2024
MNC037-053-211654-
/O.CAN.KMPX.FF.W.0009.000000T0000Z-240721T1745Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Dakota MN-Hennepin MN-
1144 AM CDT Sun Jul 21 2024
...FLASH FLOOD WARNING IS CANCELLED FOR NORTHWESTERN DAKOTA AND
SOUTHEASTERN HENNEPIN COUNTIES...
Flash Flooding is no longer expected to pose a threat. Please
continue to heed remaining road closures.
&&
LAT...LON 4492 9298 4489 9301 4489 9302 4490 9304
4492 9305 4492 9309 4492 9310 4492 9313
4490 9314 4489 9316 4489 9318 4491 9320
4494 9320 4495 9320 4495 9321 4498 9318
4498 9298
$$
MNC123-211745-
/O.CON.KMPX.FF.W.0009.000000T0000Z-240721T1745Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Ramsey MN-
1144 AM CDT Sun Jul 21 2024
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1245 PM CDT THIS
AFTERNOON FOR SOUTHERN RAMSEY COUNTY...
At 1144 AM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 2 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.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 4492 9298 4489 9301 4489 9302 4490 9304
4492 9305 4492 9309 4492 9310 4492 9313
4490 9314 4489 9316 4489 9318 4491 9320
4494 9320 4495 9320 4495 9321 4498 9318
4498 9298
FLASH FLOOD...RADAR INDICATED
$$
CTG722
WGUS73 KMPX 211710
FFSMPX
Flash Flood Statement
National Weather Service Twin Cities/Chanhassen MN
1210 PM CDT Sun Jul 21 2024
MNC123-211720-
/O.CAN.KMPX.FF.W.0009.000000T0000Z-240721T1745Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Ramsey MN-
1210 PM CDT Sun Jul 21 2024
...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHERN RAMSEY COUNTY...
The heavy rain has ended. Flash Flooding is no longer expected to
pose a threat. Please continue to heed remaining road closures.
&&
LAT...LON 4492 9298 4489 9301 4489 9302 4490 9304
4492 9305 4492 9309 4492 9310 4492 9313
4490 9314 4489 9316 4489 9318 4491 9320
4494 9320 4495 9320 4495 9321 4498 9318
4498 9298
$$
CTGThe office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 9:59 AM CDT | Special Weather Statement | MPX | Ramsey | 91 min |
| Jul 21, 12:28 PM CDT | Special Weather Statement | MPX | Nicollet | 32 min |
| Jul 21, 12:31 PM CDT | Special Weather Statement | MPX | McLeod | 29 min |
| Jul 21, 1:51 PM CDT | Special Weather Statement | MPX | Brown | 24 min |
Nearby
Flash Flood Warnings in Minnesota, 2024Every flash flood warning in 2024
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.