Alert archive / Minnesota / Flash Flood Warnings in 2021
Flash Flood Warning 4, NWS Twin Cities, MN
NWS Twin Cities, MN issued this flash flood warning at Aug 27, 2021, 8:21 PM CDT for Freeborn County, Minnesota. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 27, 2021, 8:21 PM CDT (01:21 UTC)
- Expired
- Aug 28, 2021, 12:10 AM CDT
- In force
- 4 hr
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
- Flood severity
- None
County Freeborn County, MN
The radar
The Minneapolis radar (KMPX), 145 km from the middle of the area, began a volume at 01:23 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
Minneapolis, MN (KMPX), launched 00:00Z, 1.4 hours before the alert went out and 145 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
- 652 J/kg
- Mixed-layer CIN
- -66 J/kg
- Mixed-layer LCL
- 643 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 140 m²/s²
- 0-3 km storm-relative helicity
- 175 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 3.5
The text
As transmitted.
744
WGUS53 KMPX 280121
FFWMPX
MNC047-280600-
/O.NEW.KMPX.FF.W.0004.210828T0121Z-210828T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Twin Cities/Chanhassen MN
821 PM CDT Fri Aug 27 2021
The National Weather Service in the Twin Cities has issued a
* Flash Flood Warning for...
Southeastern Freeborn County in south central Minnesota...
* Until 100 AM CDT.
* At 821 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Rainfall last night ranged from
6 to 8 inches in the area and the expected rainfall rate of 1 to
1.5 inches per hour is expected to result in flash flooding.
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...
Albert Lea, Glenville, Emmons, London, Hayward, Twin Lakes and
Myrtle.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 4350 9365 4373 9305 4350 9305
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-1.5 INCHES IN 1 HOUR
$$
Borghoff1 follow-up statement
309 WGUS73 KMPX 280510 FFSMPX Flash Flood Statement National Weather Service Twin Cities/Chanhassen MN 1210 AM CDT Sat Aug 28 2021 MNC047-280520- /O.CAN.KMPX.FF.W.0004.000000T0000Z-210828T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Freeborn MN- 1210 AM CDT Sat Aug 28 2021 ...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHEASTERN FREEBORN COUNTY... The heavy rain has ended. Flooding is no longer expected to pose a threat. Please continue to heed remaining road closures. LAT...LON 4350 9365 4373 9305 4350 9305 $$ CEO
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 27, 11:48 PM CDT | Special Weather Statement | MPX | Freeborn | 87 min |
| Aug 28, 8:14 AM CDT | Special Weather Statement | MPX | Stevens | 61 min |
| Aug 28, 9:27 AM CDT | Severe Thunderstorm Warning | MPX | Lac qui Parle | 33 min |
| Aug 28, 9:49 AM CDT | Severe Thunderstorm Warning | MPX | Douglas, Pope, Stevens | 56 min |
| Aug 28, 9:54 AM CDT | Severe Thunderstorm Warning | MPX | Swift | 51 min |
| Aug 28, 10:31 AM CDT | Severe Thunderstorm Warning | MPX | Swift | 44 min |
| Aug 28, 10:41 AM CDT | Severe Thunderstorm Warning | MPX | Douglas, Pope, Stearns, Todd | 49 min |
| Aug 28, 10:53 AM CDT | Severe Thunderstorm Warning | MPX | Kandiyohi | 52 min |
| Aug 28, 11:20 AM CDT | Severe Thunderstorm Warning | MPX | Stearns | 40 min |
| Aug 28, 11:24 AM CDT | Tornado Warning | MPX | Stearns | 36 min |
| Aug 28, 11:32 AM CDT | Severe Thunderstorm Warning | MPX | Morrison, Todd | 43 min |
| Aug 28, 11:45 AM CDT | Severe Thunderstorm Warning | MPX | Benton, Mille Lacs, Morrison, Sherburne | 45 min |
| Aug 28, 12:04 PM CDT | Tornado Warning | MPX | Benton, Mille Lacs | 41 min |
| Aug 28, 12:27 PM CDT | Severe Thunderstorm Warning | MPX | Isanti, Kanabec, Mille Lacs | 48 min |
| Aug 28, 12:43 PM CDT | Special Weather Statement | MPX | Anoka | 47 min |
| Aug 28, 1:07 PM CDT | Special Weather Statement | MPX | Chisago | 23 min |
| Aug 28, 1:29 PM CDT | Severe Thunderstorm Warning | MPX | Chisago, Isanti | 46 min |
| Aug 28, 6:06 PM CDT | Severe Thunderstorm Warning | MPX | Brown, Redwood, Watonwan | 54 min |
| Aug 28, 6:19 PM CDT | Tornado Warning | MPX | Brown, Redwood | 26 min |
| Aug 28, 6:26 PM CDT | Severe Thunderstorm Warning | MPX | Blue Earth, Faribault, Martin, Watonwan | 64 min |
| Aug 28, 6:43 PM CDT | Severe Thunderstorm Warning | MPX | Blue Earth, Brown, Nicollet, Redwood, Renville, Sibley and 1 more | 62 min |
| Aug 28, 6:51 PM CDT | Tornado Warning | MPX | Brown, Nicollet | 24 min |
Nearby
Flash Flood Warnings in Minnesota, 2021Every flash flood warning in 2021
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.