Alert archive / California / Flood Watches in 2017
Flood Watch 8, NWS Eureka, CA
NWS Eureka, CA issued this flood watch at Nov 19, 2017, 2:22 PM PST for Del Norte County, Humboldt County, Trinity County, California. It took effect at Nov 19, 2017, 10:00 PM PST. It was in force for 21 hr.
The area
The counties it named.
The facts
- Issued
- Nov 19, 2017, 2:22 PM PST (22:22 UTC)
- In effect from
- Nov 19, 2017, 10:00 PM PST
- Expired
- Nov 20, 2017, 7:03 PM PST
- In force
- 21 hr
- Issued by
- NWS Eureka, CA
Counties Del Norte County, CA, Humboldt County, CA, Trinity County, CA
The radar
The Eureka (Bunker Hill) radar (KBHX), 80 km from the middle of the area, began a volume at 22:22 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 12:00Z, 10.4 hours before the alert went out and 165 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
- 812 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 58 m²/s²
- 0-3 km storm-relative helicity
- 189 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
105 WGUS66 KEKA 192222 FFAEKA URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Eureka CA 222 PM PST Sun Nov 19 2017 CAZ102-104>108-200630- /O.NEW.KEKA.FA.A.0002.171120T0600Z-171121T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Del Norte Interior-Southwestern Humboldt- Northern Humboldt Interior-Southern Humboldt Interior- Northern Trinity-Southern Trinity- 222 PM PST Sun Nov 19 2017 ...FLOOD WATCH IN EFFECT FROM 10 PM PST THIS EVENING THROUGH MONDAY EVENING... The National Weather Service in Eureka has issued a * Flood Watch for a portion of northwest California, including the following areas, Del Norte Interior, Northern Humboldt Interior, Northern Trinity, Southern Humboldt Interior, Southern Trinity, and Southwestern Humboldt. * From 10 PM PST this evening through Monday evening * Heavy rain is forecast to occur during Monday with storm total rainfall possibly exceeding 5 inches across westward facing mountain slopes. The heavy rainfall may lead to urban and small stream flooding. In addition, mountain rock and mud slides will be possible, including areas around the Trinity County burn scar near Helena. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flood Watch means there is a potential for flooding based on current forecasts. You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop. && $$
5 follow-up statements
270 WGUS66 KEKA 200601 FFAEKA Flood Watch National Weather Service Eureka CA 1001 PM PST Sun Nov 19 2017 CAZ102-104>108-201400- /O.CON.KEKA.FA.A.0002.000000T0000Z-171121T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Del Norte Interior-Southwestern Humboldt- Northern Humboldt Interior-Southern Humboldt Interior- Northern Trinity-Southern Trinity- 1001 PM PST Sun Nov 19 2017 ...FLOOD WATCH REMAINS IN EFFECT THROUGH MONDAY EVENING... The Flood Watch continues for * A portion of northwest California, including the following areas, Del Norte Interior, Northern Humboldt Interior, Northern Trinity, Southern Humboldt Interior, Southern Trinity, and Southwestern Humboldt. * Through Monday evening * Heavy rain is forecast to occur during Monday with storm total rainfall possibly exceeding 5 inches across westward facing mountain slopes. The heavy rainfall may lead to urban and small stream flooding. In addition, mountain rock and mud slides will be possible, including areas around the Trinity County burn scar near Helena. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flood Watch means there is a potential for flooding based on current forecasts. You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop. && $$
724 WGUS66 KEKA 201255 FFAEKA Flood Watch National Weather Service Eureka CA 455 AM PST Mon Nov 20 2017 CAZ102-104>106-202100- /O.CON.KEKA.FA.A.0002.000000T0000Z-171121T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Del Norte Interior-Southwestern Humboldt- Northern Humboldt Interior-Southern Humboldt Interior- 455 AM PST Mon Nov 20 2017 ...FLOOD WATCH REMAINS IN EFFECT THROUGH THIS EVENING... The Flood Watch continues for * A portion of northwest California, including the following areas, Del Norte Interior, Northern Humboldt Interior, Southern Humboldt Interior, and Southwestern Humboldt. * Through this evening * Heavy rain will continue today with storm total rainfall amounts exceeding 5 inches possible across westward facing mountain slopes. * The heavy rainfall may lead to urban and small stream flooding. In addition rock and mud slides will be possible in steep terrain. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flood Watch means there is a potential for flooding based on current forecasts. You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop. && $$ CAZ107-108-202100- /O.CON.KEKA.FA.A.0002.000000T0000Z-171121T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Northern Trinity-Southern Trinity- 455 AM PST Mon Nov 20 2017 ...FLOOD WATCH REMAINS IN EFFECT THROUGH THIS EVENING... The Flood Watch continues for * A portion of northwest California, including the following areas, Northern Trinity and Southern Trinity. * Through this evening * Moderate to heavy rain will continue today with storm total rainfall amounts exceeding 3 inches possible on westward facing mountain slopes. * There is an increased potential for flooding along with rock or land slides in and below burn scars. Hourly rainfall rates could exceed a half inch per hour at times during the upcoming storm. Severely burned areas are of particular concern. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flood Watch means there is a potential for flooding based on current forecasts. You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop. && $$
496 WGUS66 KEKA 201535 FFAEKA Flood Watch National Weather Service Eureka CA 735 AM PST Mon Nov 20 2017 CAZ102-104>106-202345- /O.CON.KEKA.FA.A.0002.000000T0000Z-171121T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Del Norte Interior-Southwestern Humboldt- Northern Humboldt Interior-Southern Humboldt Interior- 735 AM PST Mon Nov 20 2017 ...FLOOD WATCH REMAINS IN EFFECT THROUGH THIS EVENING... The Flood Watch continues for * A portion of northwest California, including the following areas, Del Norte Interior, Northern Humboldt Interior, Southern Humboldt Interior, and Southwestern Humboldt. * Through this evening * Heavy rain will continue today, with storm total rainfall amounts exceeding 5 inches across westward facing mountain slopes. * The heavy rainfall may lead to urban and small stream flooding. In addition rock and mud slides will be possible in steep terrain. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flood Watch means there is a potential for flooding based on current forecasts. You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop. && $$ CAZ107-108-202345- /O.CON.KEKA.FA.A.0002.000000T0000Z-171121T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Northern Trinity-Southern Trinity- 735 AM PST Mon Nov 20 2017 ...FLOOD WATCH REMAINS IN EFFECT THROUGH THIS EVENING... The Flood Watch continues for * A portion of northwest California, including the following areas, Northern Trinity and Southern Trinity. * Through this evening * Moderate to heavy rain will continue today with storm total rainfall amounts exceeding 3 inches over westward facing mountain slopes. * There is an increased potential for flooding along with rock or land slides in and below burn scars. Hourly rainfall rates could exceed a half inch per hour at times during the upcoming storm. Severely burned areas are of particular concern. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flood Watch means there is a potential for flooding based on current forecasts. You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop. && $$
622 WGUS66 KEKA 202217 FFAEKA Flood Watch National Weather Service Eureka CA 217 PM PST Mon Nov 20 2017 CAZ102-104>106-210600- /O.CON.KEKA.FA.A.0002.000000T0000Z-171121T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Del Norte Interior-Southwestern Humboldt- Northern Humboldt Interior-Southern Humboldt Interior- 217 PM PST Mon Nov 20 2017 ...FLOOD WATCH REMAINS IN EFFECT UNTIL 10 PM PST THIS EVENING... The Flood Watch continues for * A portion of northwest California, including the following areas, Del Norte Interior, Northern Humboldt Interior, Southern Humboldt Interior, and Southwestern Humboldt. * Until 10 PM PST this evening * Heavy rain will continue this evening, with an additional 1 to 3 inches of rain expected across westward facing mountain slopes. * The heavy rainfall may lead to urban and small stream flooding. In addition rock and mud slides will be possible in steep terrain. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flood Watch means there is a potential for flooding based on current forecasts. You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop. && $$ CAZ107-108-210600- /O.CON.KEKA.FA.A.0002.000000T0000Z-171121T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Northern Trinity-Southern Trinity- 217 PM PST Mon Nov 20 2017 ...FLOOD WATCH REMAINS IN EFFECT UNTIL 10 PM PST THIS EVENING... The Flood Watch continues for * A portion of northwest California, including the following areas, Northern Trinity and Southern Trinity. * Until 10 PM PST this evening * Moderate to heavy rain will continue this evening, with an additional 1 to 2 inches of rain expected across westward facing mountain slopes. * There is an increased potential for small stream flooding along with rock or mud slides in and below burn scars. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flood Watch means there is a potential for flooding based on current forecasts. You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop. && $$
226 WGUS66 KEKA 210303 FFAEKA Flood Watch National Weather Service Eureka CA 703 PM PST Mon Nov 20 2017 CAZ102-104>108-210415- /O.CAN.KEKA.FA.A.0002.000000T0000Z-171121T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Del Norte Interior-Southwestern Humboldt- Northern Humboldt Interior-Southern Humboldt Interior- Northern Trinity-Southern Trinity- 703 PM PST Mon Nov 20 2017 ...FLOOD WATCH IS CANCELLED... The Flood Watch for portions of northwest California has been cancelled. Areas of light rain will continue to fall through the evening hours but will diminish greatly by midnight. $$
Nearby
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.