Alert archive / California / Flash Flood Warnings in 2021
Flash Flood Warning 3, NWS Medford, OR
NWS Medford, OR issued this flash flood warning at Oct 22, 2021, 4:25 AM PDT for Siskiyou County, California. It was in force for 2 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
- Oct 22, 2021, 4:25 AM PDT (11:25 UTC)
- Expired
- Oct 22, 2021, 6:50 AM PDT
- In force
- 2 hr
- Issued by
- NWS Medford, OR
- Area
- Storm-based polygon
- Flood severity
- Moderate
County Siskiyou County, CA
The radar
The Medford radar (KMAX), 71 km from the middle of the area, began a volume at 11:25 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
Medford/Jackson, OR (KMFR), launched 00:00Z, 11.4 hours before the alert went out and 103 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1770 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- 80 m²/s²
- 0-3 km storm-relative helicity
- 201 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
439
WGUS56 KMFR 221125
FFWMFR
CAC093-221415-
/O.NEW.KMFR.FF.W.0003.211022T1125Z-211022T1415Z/
/00000.2.RS.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Medford OR
425 AM PDT Fri Oct 22 2021
The National Weather Service in Medford has issued a
* Flash Flood Warning for...
Rain and Snowmelt in...
Southeastern Siskiyou County in northern California...
* Until 715 AM PDT.
* At 425 AM PDT, local law enforcement reported debris flow and
flooding on roadway from excessive runoff.
HAZARD...Flash flooding from rain and snowmelt.
SOURCE...Law enforcement reported.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other
drainage and low lying areas.
* Highway 97 near Whitney Creek.
This includes the following streams and drainages...
Flooding is occurring along the Whitney Creek beginning at Highway
97.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
Be aware of your surroundings and do not drive on flooded roads.
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 4154 12226 4152 12225 4151 12228 4152 12231
4154 12230
FLASH FLOOD...OBSERVED
$$
Petrucelli1 follow-up statement
203
WGUS76 KMFR 221350
FFSMFR
Flash Flood Statement
National Weather Service Medford OR
650 AM PDT Fri Oct 22 2021
CAC093-221400-
/O.CAN.KMFR.FF.W.0003.000000T0000Z-211022T1415Z/
/00000.2.RS.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Siskiyou CA-
650 AM PDT Fri Oct 22 2021
...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHEASTERN SISKIYOU
COUNTY...
Flood waters have receded.
LAT...LON 4154 12226 4152 12225 4151 12228 4152 12231
4154 12230
$$
PetrucelliThe office that day
Everything else NWS Medford, OR issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 22, 12:05 PM PDT | Flash Flood Watch | MFR | Siskiyou | 59 hr |
| Oct 22, 2:59 PM PDT | High Wind Warning | MFR | Modoc, Siskiyou | 56 hr |
| Oct 22, 2:59 PM PDT | Wind Advisory | MFR | Modoc | 56 hr |
Nearby
Flash Flood Warnings in California, 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.