Alert archive / Minnesota / Flash Flood Warnings in 2020
Flash Flood Warning 9, NWS Twin Cities, MN
NWS Twin Cities, MN issued this flash flood warning at Jul 5, 2020, 3:03 PM CDT for Ramsey County, Washington County, Minnesota. It was in force for 3 hr. 2 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
- Jul 5, 2020, 3:03 PM CDT (20:03 UTC)
- Expired
- Jul 5, 2020, 6:00 PM CDT
- In force
- 3 hr
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
- Flood severity
- None
Counties Ramsey County, MN, Washington County, MN
The radar
The Minneapolis radar (KMPX), 48 km from the middle of the area, began a volume at 20:03 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 5, 3:20 PM CDT | FLASH FLOOD | 2 Se Maplewood, MN | REPORTED AT LAKEWOOD DR AND MARYLAND AVE IN MAPLEWOOD. |
| Jul 5, 3:36 PM CDT | FLASH FLOOD | 2 Wsw Oakdale, MN | REPORTED AT 2530 ROSE MAPLEWOOD, MN. |
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, 8.1 hours before the alert went out and 51 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
- 492 J/kg
- Mixed-layer CIN
- -93 J/kg
- Mixed-layer LCL
- 1517 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- 33 m²/s²
- 0-3 km storm-relative helicity
- 50 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
931
WGUS53 KMPX 052003
FFWMPX
MNC123-163-052300-
/O.NEW.KMPX.FF.W.0009.200705T2003Z-200705T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Twin Cities/Chanhassen MN
303 PM CDT Sun Jul 5 2020
The National Weather Service in the Twin Cities has issued a
* Flash Flood Warning for...
East Central Ramsey County in east central Minnesota...
West Central Washington County in east central Minnesota...
* Until 600 PM CDT.
* At 303 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 3 inches of rain
have fallen. Flash flooding is ongoing or expected to begin
shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Doppler radar.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other
drainage and low lying areas.
* Additional rainfall amounts of 1 to 2 inches are possible.
* Some locations that will experience flash flooding include...
St. Paul, Maplewood, Oakdale, Lake Elmo, North St. Paul, Landfall,
Pine Springs and Lake Phalen.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
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 4495 9304 4499 9309 4503 9304 4503 9300
4503 9298 4503 9293 4500 9288 4495 9290
FLASH FLOOD...RADAR INDICATED
$$
CTG1 follow-up statement
871
WGUS73 KMPX 052058
FFSMPX
Flash Flood Statement
National Weather Service Twin Cities/Chanhassen MN
358 PM CDT Sun Jul 5 2020
MNC123-163-052300-
/O.CON.KMPX.FF.W.0009.000000T0000Z-200705T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Ramsey MN-Washington MN-
358 PM CDT Sun Jul 5 2020
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 6 PM CDT THIS EVENING
FOR EAST CENTRAL RAMSEY AND WEST CENTRAL WASHINGTON COUNTIES...
At 358 PM CDT, local law enforcement reported thunderstorms
producing heavy rain across the warned area. Between 2 and 4 inches
of rain have fallen. Flash flooding is already occurring.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Law enforcement.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other
drainage and low lying areas.
Additional rainfall amounts of 1 to 2 inches are possible.
Some locations that will experience flash flooding include...
St. Paul, Maplewood, Oakdale, Lake Elmo, North St. Paul, Landfall,
Pine Springs and Lake Phalen.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, urban areas, highways, streets and underpasses
as well as other drainage areas and low lying spots.
&&
LAT...LON 4495 9304 4499 9309 4503 9304 4503 9300
4503 9298 4503 9293 4500 9288 4495 9290
FLASH FLOOD...OBSERVED
$$
CTGThe office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 5, 2:59 AM CDT | Heat Advisory | MPX | Anoka, Carver, Dakota, Hennepin, Ramsey, Scott and 1 more | 16 hr |
| Jul 5, 1:47 PM CDT | Special Weather Statement | MPX | Washington | 28 min |
| Jul 5, 1:52 PM CDT | Special Weather Statement | MPX | Washington | 23 min |
| Jul 5, 2:19 PM CDT | Special Weather Statement | MPX | Washington | 26 min |
| Jul 5, 2:48 PM CDT | Special Weather Statement | MPX | Ramsey, Washington | 27 min |
| Jul 5, 3:00 PM CDT | Special Weather Statement | MPX | Washington | 30 min |
Nearby
Flash Flood Warnings in Minnesota, 2020Every flash flood warning in 2020
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.