Alert archive / California / Flash Flood Warnings in 2015
Flash Flood Warning 2, NWS Medford, OR
NWS Medford, OR issued this flash flood warning at Jul 20, 2015, 8:09 PM PDT for Siskiyou County, California. 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 20, 2015, 8:09 PM PDT (03:09 UTC)
- Expired
- Jul 20, 2015, 11:00 PM PDT
- In force
- 3 hr
- Issued by
- NWS Medford, OR
- Area
- Storm-based polygon
- Flood severity
- None
County Siskiyou County, CA
The radar
The Medford radar (KMAX), 49 km from the middle of the area, began a volume at 03:09 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 20, 8:24 PM PDT | HEAVY RAIN 1.5 | 4 W Grenada, CA | RAIN FELL IN <90 MINUTES. STANDING WATER. RAINING HEAVILY. |
| Jul 20, 8:55 PM PDT | FLASH FLOOD | 1 Sw Grenada, CA | YREKA DISPATCH REPORTED FLOODING OF HOMES IN GRENADA AND EVACUATIONS OCCURRING AT SHEPARD OF GOD ASSISTED LIVING CENTER IN GRENADA DUE TO WATER ENTERING THE BUILDING. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Medford/Jackson, OR (KMFR), launched 00:00Z, 3.2 hours before the alert went out and 82 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
- 13 J/kg
- Mixed-layer CIN
- -129 J/kg
- Mixed-layer LCL
- 3153 m above ground
- 0-6 km bulk shear
- 5 kt
- 0-1 km storm-relative helicity
- -16 m²/s²
- 0-3 km storm-relative helicity
- 23 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
806
WGUS56 KMFR 210309
FFWMFR
CAC093-210600-
/O.NEW.KMFR.FF.W.0002.150721T0309Z-150721T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MEDFORD OR
809 PM PDT MON JUL 20 2015
THE NATIONAL WEATHER SERVICE IN MEDFORD HAS ISSUED A
* FLASH FLOOD WARNING FOR...
CENTRAL SISKIYOU COUNTY IN NORTHERN CALIFORNIA...
* UNTIL 1100 PM PDT
* AT 807 PM PDT...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING
VERY HEAVY RAIN ACROSS THE WARNED AREA. RADAR ESTIMATES MORE THAN
THREE INCHES OF RAIN HAVE ALREADY FALLEN. FLASH FLOODING IS
OCCURRING NOW OR EXPECTED TO BEGIN SHORTLY. TRAVELERS ALONG
INTERSTATE 5 MAY ENCOUNTER FLOODED ROADWAYS.
* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
GRENADA.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.
STAY AWAY OR BE SWEPT AWAY. RIVER BANKS AND CULVERTS CAN BECOME
UNSTABLE AND UNSAFE. TURN AROUND DON'T DROWN.
&&
LAT...LON 4170 12247 4159 12249 4163 12262 4170 12260
$$
MAS4 follow-up statements
911 WGUS76 KMFR 210354 FFSMFR FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE MEDFORD OR 854 PM PDT MON JUL 20 2015 CAC093-210600- /O.CON.KMFR.FF.W.0002.000000T0000Z-150721T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SISKIYOU CA- 854 PM PDT MON JUL 20 2015 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1100 PM PDT FOR CENTRAL SISKIYOU COUNTY... AT 850 PM PDT...DOPPLER RADAR INDICATED THUNDERSTORMS THAT WERE PRODUCING HEAVY RAIN ACROSS THE WARNED AREA ARE WEAKENING. HOWEVER, RADAR ESTIMATES OF OVER THREE INCHES OF RAIN HAVE ALREADY FALLEN. FLASH FLOODING IS EXPECTED TO PERSIST AND TRAVELERS ALONG INTERSTATE 5 MAY ENCOUNTER FLOODED ROADWAYS. LAW ENFORCEMENT REPORTS PORTIONS OF OLD HIGHWAY 99 ARE BLOCKED BY FLOODING AND DEBRIS NEAR GRENADA AT THE INTERCHANGE WITH INTERSTATE 5. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... GRENADA. PRECAUTIONARY/PREPAREDNESS ACTIONS... MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE. TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD DEATHS OCCUR IN VEHICLES. && LAT...LON 4170 12247 4159 12249 4163 12262 4170 12260 $$ MAS
593 WGUS76 KMFR 210401 FFSMFR FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE MEDFORD OR 901 PM PDT MON JUL 20 2015 CAC093-210600- /O.CON.KMFR.FF.W.0002.000000T0000Z-150721T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SISKIYOU CA- 901 PM PDT MON JUL 20 2015 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1100 PM PDT FOR CENTRAL SISKIYOU COUNTY... AT 858 PM PDT...DOPPLER RADAR INDICATES THE THUNDERSTORMS THAT WERE PRODUCING HEAVY RAIN ACROSS THE WARNED AREA CONTINUE TO WEAKEN. HOWEVER, RADAR ESTIMATES OF OVER THREE INCHES OF RAIN HAVE ALREADY FALLEN. FLASH FLOODING IS EXPECTED TO PERSIST AND TRAVELERS ALONG INTERSTATE 5 MAY ENCOUNTER FLOODED ROADWAYS. LAW ENFORCEMENT REPORTS PORTIONS OF OLD HIGHWAY 99 ARE BLOCKED BY FLOODING AND DEBRIS NEAR GRENADA AT THE INTERCHANGE WITH INTERSTATE 5. FLOODING IS ALSO OCCURRING AND EVACUATIONS ARE UNDERWAY AT SHEPHERD OF GOD ASSISTED LIVING IN GRENADA. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... GRENADA. PRECAUTIONARY/PREPAREDNESS ACTIONS... MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE. TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD DEATHS OCCUR IN VEHICLES. && LAT...LON 4170 12247 4159 12249 4163 12262 4170 12260 $$ MAS
723 WGUS76 KMFR 210432 FFSMFR FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE MEDFORD OR 932 PM PDT MON JUL 20 2015 CAC093-210600- /O.CON.KMFR.FF.W.0002.000000T0000Z-150721T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SISKIYOU CA- 932 PM PDT MON JUL 20 2015 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1100 PM PDT FOR CENTRAL SISKIYOU COUNTY... AT 929 PM PDT...DOPPLER RADAR INDICATED THE THUNDERSTORMS THAT PRODUCED THE HEAVY RAIN ACROSS THE AREA HAVE WEAKENED AND MOVED AWAY. RADAR ESTIMATES OF OVER THREE INCHES OF RAIN FELL IN A SHORT PERIOD OF TIME EARLIER THIS EVENING CAUSING FLASH FLOODING IN AND AROUND GRENADA. WHILE THE HEAVY RAINFALL IS OVER, RESIDUAL FLOODING MAY CONTINUE FOR THE NEXT HOUR OR SO. DEBRIS MAY STILL COVER SOME ROADWAYS. MOTORISTS SHOULD USE EXTRA CAUTION. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...GRENADA. PRECAUTIONARY/PREPAREDNESS ACTIONS... TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD DEATHS OCCUR IN VEHICLES. && LAT...LON 4170 12247 4159 12249 4163 12262 4170 12260 $$ MAS
059 WGUS76 KMFR 210500 FFSMFR FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE MEDFORD OR 1000 PM PDT MON JUL 20 2015 CAC093-210510- /O.CAN.KMFR.FF.W.0002.000000T0000Z-150721T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SISKIYOU CA- 1000 PM PDT MON JUL 20 2015 ...THE FLASH FLOOD WARNING FOR CENTRAL SISKIYOU COUNTY IS CANCELLED... FLOOD WATERS HAVE RECEDED...AND ARE NO LONGER EXPECTED TO POSE A THREAT TO LIFE OR PROPERTY. PLEASE CONTINUE TO HEED ANY ROAD CLOSURES. LAT...LON 4170 12247 4159 12249 4163 12262 4170 12260 $$ MAS
The office that day
Everything else NWS Medford, OR issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 7:11 PM PDT | Red Flag Warning | MFR | Siskiyou | 3 hr |
| Jul 20, 7:15 PM PDT | Special Weather Statement | MFR | Siskiyou | 30 min |
| Jul 20, 7:29 PM PDT | Severe Thunderstorm Warning | MFR | Siskiyou | 31 min |
| Jul 20, 7:56 PM PDT | Areal Flood Advisory | MFR | Siskiyou | 3 hr |
| Jul 20, 8:29 PM PDT | Special Weather Statement | MFR | Siskiyou | 31 min |
| Jul 21, 4:07 AM PDT | Red Flag Warning | MFR | Modoc, Siskiyou | 21 hr |
| Jul 21, 1:09 PM PDT | Special Weather Statement | MFR | Modoc | 36 min |
| Jul 21, 1:55 PM PDT | Special Weather Statement | MFR | Modoc | 35 min |
| Jul 21, 2:08 PM PDT | Severe Thunderstorm Warning | MFR | Modoc | 22 min |
| Jul 21, 2:33 PM PDT | Special Weather Statement | MFR | Modoc | 27 min |
| Jul 21, 2:44 PM PDT | Special Weather Statement | MFR | Modoc | 31 min |
| Jul 21, 4:37 PM PDT | Special Weather Statement | MFR | Siskiyou | 23 min |
Nearby
Flash Flood Warnings in California, 2015Every flash flood warning in 2015
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.