Alert archive / Arizona / Flash Flood Watches in 2021
Flash Flood Watch 2, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this flash flood watch at Jul 14, 2021, 9:53 AM MST for Apache County, Coconino County, Navajo County, Arizona. It took effect at Jul 14, 2021, 1:00 PM MST. It was in force for 14 hr.
The area
The counties it named.
The facts
- Issued
- Jul 14, 2021, 9:53 AM MST (16:53 UTC)
- In effect from
- Jul 14, 2021, 1:00 PM MST
- Expired
- Jul 15, 2021, 3:18 AM MST
- In force
- 14 hr
- Issued by
- NWS Flagstaff, AZ
- Flood severity
- None
Counties Apache County, AZ, Coconino County, AZ, Navajo County, AZ
The radar
The Flagstaff radar (KFSX), 124 km from the middle of the area, began a volume at 16:55 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
Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 4.9 hours before the alert went out and 121 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
- 17 J/kg
- Mixed-layer CIN
- -187 J/kg
- Mixed-layer LCL
- 1682 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 14 m²/s²
- 0-3 km storm-relative helicity
- 37 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted.
420 WGUS65 KFGZ 141653 FFAFGZ URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Flagstaff AZ 953 AM MST Wed Jul 14 2021 AZZ004>006-009-150100- /O.NEW.KFGZ.FF.A.0002.210714T2000Z-210715T0700Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Kaibab Plateau-Marble and Glen Canyons-Grand Canyon Country- Northeast Plateaus and Mesas Hwy 264 Northward- Including the cities of Jacob Lake, Fredonia, Page, Lees Ferry, Grand Canyon Village, Supai, North Rim, Keams Canyon, and Kaibito 953 AM MST Wed Jul 14 2021 ...FLASH FLOOD WATCH IN EFFECT FROM 1 PM MST THIS AFTERNOON THROUGH MIDNIGHT THIS EVENING... The National Weather Service in Flagstaff has issued a * Flash Flood Watch for portions of north central Arizona including the following areas,Grand Canyon Country, Kaibab Plateau, Havasupai, Marble and Glen Canyons, Antelope Canyon, Northeast Plateaus and Mesas Hwy 264 Northward. * From 1 PM MST this afternoon through this evening * Monsoonal thunderstorm coverage will increase across much of northern Arizona this afternoon and evening. The saturated atmosphere will be capable of producing heavy rainfall within the stronger thunderstorms through late tonight. That rainfall could produce flash flooding within normally dry washes, creeks, and drainages in northern Coconino County and portions of northern Navajo County. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch Means That Developing Conditions May Lead To Flash Flooding Within The Watch area. People...especially those located along area creeks...rivers or other flash flood prone areas...should continue to monitor later forecasts and be prepared to take immediate action should flash flood warnings be issued. && $$
3 follow-up statements
595 WGUS65 KFGZ 142101 FFAFGZ Flood Watch National Weather Service Flagstaff AZ 201 PM MST Wed Jul 14 2021 AZZ004>006-009-150515- /O.CON.KFGZ.FF.A.0002.000000T0000Z-210715T0700Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Kaibab Plateau-Marble and Glen Canyons-Grand Canyon Country- Northeast Plateaus and Mesas Hwy 264 Northward- Including the cities of Jacob Lake, Fredonia, Page, Lees Ferry, Grand Canyon Village, Supai, North Rim, Keams Canyon, and Kaibito 201 PM MST Wed Jul 14 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL MIDNIGHT MST TONIGHT... The Flash Flood Watch continues for * Portions of north central Arizona and northeast Arizona, including the following areas, in north central Arizona, Grand Canyon Country, Kaibab Plateau, and Marble and Glen Canyons. In northeast Arizona, Northeast Plateaus and Mesas Hwy 264 Northward. * Until midnight MST tonight * Monsoonal thunderstorm coverage will continue across much of northern Arizona this afternoon and evening. The saturated atmosphere will be capable of producing heavy rainfall within the stronger thunderstorms through late tonight. That rainfall could produce flash flooding within normally dry washes, creeks, and drainages in northern Coconino County and portions of northern Navajo County. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch Means That Developing Conditions May Lead To Flash Flooding Within The Watch area. People...especially those located along area creeks...rivers or other flash flood prone areas...should continue to monitor later forecasts and be prepared to take immediate action should flash flood warnings be issued. && $$
832 WGUS65 KFGZ 150342 FFAFGZ URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Flagstaff AZ 842 PM MST Wed Jul 14 2021 AZZ004>006-009-151200- /O.EXT.KFGZ.FF.A.0002.000000T0000Z-210715T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Kaibab Plateau-Marble and Glen Canyons-Grand Canyon Country- Northeast Plateaus and Mesas Hwy 264 Northward- Including the cities of Jacob Lake, Keams Canyon, Fredonia, North Rim, Grand Canyon Village, Lees Ferry, Supai, Page, and Kaibito 842 PM MST Wed Jul 14 2021 ...FLASH FLOOD WATCH NOW IN EFFECT UNTIL 5 AM MST THURSDAY... The Flash Flood Watch is now in effect for * Portions of north central Arizona and northeast Arizona, including the following areas, in north central Arizona, Grand Canyon Country, Kaibab Plateau and Marble and Glen Canyons. In northeast Arizona, Northeast Plateaus and Mesas Hwy 264 Northward. * Until 5 AM MST Thursday. * Strong thunderstorms on Wednesday produced heavy rainfall over sections of the Watch area. Another line of strong thunderstorms is expected to move into parts of northwestern and north-central Arizona overnight and bring another round of heavy rainfall lasting into early Thursday morning. The Flash Flood Watch has been extended as a result. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. Areas that observed heavy rainfall earlier on Wednesday are at an even greater risk for potential flash flooding tonight if heavy rainfall occurs. && $$ NL
545 WGUS65 KFGZ 151018 FFAFGZ Flood Watch National Weather Service Flagstaff AZ 318 AM MST Thu Jul 15 2021 AZZ004>006-009-151130- /O.CAN.KFGZ.FF.A.0002.000000T0000Z-210715T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Kaibab Plateau-Marble and Glen Canyons-Grand Canyon Country- Northeast Plateaus and Mesas Hwy 264 Northward- Including the cities of Jacob Lake, Keams Canyon, Fredonia, North Rim, Grand Canyon Village, Lees Ferry, Supai, Page, and Kaibito 318 AM MST Thu Jul 15 2021 ...FLASH FLOOD WATCH IS CANCELLED... The Flash Flood Watch has been cancelled for portions of north central Arizona and northeast Arizona, including the following areas, in north central Arizona, Grand Canyon Country, Kaibab Plateau and Marble and Glen Canyons. In northeast Arizona, Northeast Plateaus and Mesas Hwy 264 Northward. The Flood Watch is cancelled. Flooding is no longer expected to pose a threat. Please continue to heed remaining road closures. $$ EL
The office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 13, 5:20 PM MST | Flash Flood Warning | FGZ | Gila, Yavapai | 3 hr |
| Jul 13, 7:23 PM MST | Flash Flood Warning | FGZ | Coconino | 3 hr |
| Jul 14, 2:39 AM MST | Special Weather Statement | FGZ | Yavapai | 36 min |
| Jul 14, 3:06 AM MST | Areal Flood Advisory | FGZ | Yavapai | 111 min |
| Jul 14, 3:24 AM MST | Special Weather Statement | FGZ | Yavapai | 36 min |
| Jul 14, 3:38 AM MST | Areal Flood Advisory | FGZ | Yavapai | 2 hr |
| Jul 14, 3:59 AM MST | Special Weather Statement | FGZ | Yavapai | 46 min |
| Jul 14, 4:24 AM MST | Areal Flood Advisory | FGZ | Yavapai | 74 min |
| Jul 14, 4:30 AM MST | Special Weather Statement | FGZ | 45 min | |
| Jul 14, 4:45 AM MST | Special Weather Statement | FGZ | 45 min | |
| Jul 14, 5:23 AM MST | Special Weather Statement | FGZ | 37 min | |
| Jul 14, 1:47 PM MST | Flash Flood Warning | FGZ | Coconino | 5 hr |
| Jul 14, 2:13 PM MST | Flash Flood Warning | FGZ | Coconino | 3 hr |
| Jul 14, 2:39 PM MST | Flash Flood Warning | FGZ | Coconino | 3 hr |
| Jul 14, 2:57 PM MST | Flash Flood Warning | FGZ | Yavapai | 3 hr |
| Jul 14, 3:36 PM MST | Flash Flood Warning | FGZ | Coconino | 3 hr |
| Jul 14, 4:02 PM MST | Severe Thunderstorm Warning | FGZ | Coconino | 31 min |
| Jul 14, 4:24 PM MST | Flash Flood Warning | FGZ | Yavapai | 111 min |
| Jul 14, 4:54 PM MST | Flash Flood Warning | FGZ | Navajo | 111 min |
Nearby
Flash Flood Watches in Arizona, 2021Every flash flood watch 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.