Alert archive / Arizona / Flash Flood Warnings in 2021
Flash Flood Warning 131, NWS Tucson, AZ
NWS Tucson, AZ issued this flash flood warning at Aug 14, 2021, 4:05 PM MST for Pima County, Arizona. It was in force for 115 min. 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
- Aug 14, 2021, 4:05 PM MST (23:05 UTC)
- Expired
- Aug 14, 2021, 6:00 PM MST
- In force
- 115 min
- Issued by
- NWS Tucson, AZ
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
County Pima County, AZ
The radar
The Tucson radar (KEMX), 47 km from the middle of the area, began a volume at 23:05 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 |
|---|---|---|---|
| Aug 14, 4:16 PM MST | FLASH FLOOD | 7 Ne Tucson, AZ | PUBLIC REPORT OF A VEHICLE STRANDED IN WATER NEAR THE INTERSECTION OF BEAR CANYON ROAD AND TANQUE VERDE ROAD. |
| Aug 14, 4:37 PM MST | FLASH FLOOD | 8 Ene Tucson, AZ | FLASH FLOODING ALONG CASTLE ROCK WASH. NO OTHER INFORMATION. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Tuscon, AZ (KTUS), launched 12:00Z, 11.1 hours before the alert went out and 22 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
- 69 J/kg
- Mixed-layer CIN
- -61 J/kg
- Mixed-layer LCL
- 788 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- -25 m²/s²
- 0-3 km storm-relative helicity
- 66 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
244
WGUS55 KTWC 142305
FFWTWC
AZC019-150100-
/O.NEW.KTWC.FF.W.0131.210814T2305Z-210815T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Tucson AZ
405 PM MST Sat Aug 14 2021
The National Weather Service in Tucson has issued a
* Flash Flood Warning for...
Eastern Pima County in southeastern Arizona...
* Until 600 PM MST.
* At 405 PM MST, Doppler radar and automated rain gauges indicated
showers and thunderstorms producing heavy rain across the
northeast portion of the Tucson Metro Area. Between 0.8 and 1.5
inches of rain have fallen, with additional rainfall expected over
the next 1-2 hours. Flash flooding is ongoing or expected to begin
shortly.
HAZARD...Life threatening flash flooding. Thunderstorms
producing flash flooding.
SOURCE...Radar and automated gauges.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
* Some locations that will experience flash flooding include...
Tucson, Tanque Verde, Sabino Canyon Recreation Area, Saguaro
National Park East, Catalina Foothills and Seven Falls.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 3240 11072 3234 11064 3225 11064 3220 11081
3227 11086
FLASH FLOOD...RADAR AND GAUGE INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
EC2 follow-up statements
466
WGUS75 KTWC 150018
FFSTWC
Flash Flood Statement
National Weather Service Tucson AZ
518 PM MST Sat Aug 14 2021
AZC019-150100-
/O.CON.KTWC.FF.W.0131.000000T0000Z-210815T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Pima AZ-
518 PM MST Sat Aug 14 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 6 PM MST THIS EVENING
FOR EASTERN PIMA COUNTY...
At 518 PM MST, Doppler radar and automated rain gauges indicated
showers and thunderstorms had produced heavy rain across northeast
portions of the Tucson Metro. Flash flooding is ongoing or expected
to begin shortly.
HAZARD...Life threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar and automated gauges.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
Some locations that will experience flash flooding include...
Tucson, Tanque Verde, Sabino Canyon Recreation Area, Saguaro
National Park East, Catalina Foothills and Seven Falls.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 3240 11072 3234 11064 3225 11064 3220 11081
3227 11086
FLASH FLOOD...RADAR AND GAUGE INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
EC596
WGUS75 KTWC 150055
FFSTWC
Flash Flood Statement
National Weather Service Tucson AZ
555 PM MST Sat Aug 14 2021
AZC019-150105-
/O.EXP.KTWC.FF.W.0131.000000T0000Z-210815T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Pima AZ-
555 PM MST Sat Aug 14 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 6 PM MST THIS EVENING FOR
EASTERN PIMA COUNTY...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
A Flash Flood Watch remains in effect until 500 PM MST Sunday for
all of Southeast Arizona.
LAT...LON 3240 11072 3234 11064 3225 11064 3220 11081
3227 11086
$$
ECThe office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 13, 5:06 PM MST | Special Weather Statement | TWC | Cochise | 39 min |
| Aug 13, 5:07 PM MST | Flash Flood Warning | TWC | Graham, Greenlee | 3 hr |
| Aug 13, 5:11 PM MST | Flash Flood Warning | TWC | Cochise | 3 hr |
| Aug 13, 5:48 PM MST | Special Weather Statement | TWC | Cochise | 42 min |
| Aug 13, 6:05 PM MST | Severe Thunderstorm Warning | TWC | Cochise | 40 min |
| Aug 13, 6:08 PM MST | Special Weather Statement | TWC | 37 min | |
| Aug 13, 6:12 PM MST | Special Weather Statement | TWC | 48 min | |
| Aug 13, 6:26 PM MST | Flash Flood Warning | TWC | Cochise, Graham | 3 hr |
| Aug 13, 6:30 PM MST | Flash Flood Warning | TWC | Cochise | 3 hr |
| Aug 13, 6:35 PM MST | Areal Flood Advisory | TWC | Pima | 115 min |
| Aug 13, 6:40 PM MST | Severe Thunderstorm Warning | TWC | Cochise, Pima, Santa Cruz | 50 min |
| Aug 13, 7:04 PM MST | Special Weather Statement | TWC | Cochise | 41 min |
| Aug 13, 7:22 PM MST | Special Weather Statement | TWC | Santa Cruz | 38 min |
| Aug 13, 7:55 PM MST | Special Weather Statement | TWC | Santa Cruz | 65 min |
| Aug 13, 11:49 PM MST | Dust Storm Advisory | TWC | Pima, Pinal | 56 min |
| Aug 14, 12:54 AM MST | Areal Flood Advisory | TWC | Pima, Pinal | 3 hr |
| Aug 14, 1:02 AM MST | Areal Flood Advisory | TWC | Pinal | 3 hr |
| Aug 14, 1:58 AM MST | Special Weather Statement | TWC | 62 min | |
| Aug 14, 4:11 AM MST | Areal Flood Advisory | TWC | Pima | 4 hr |
| Aug 14, 5:06 AM MST | Flash Flood Warning | TWC | Pima | 3 hr |
| Aug 14, 5:35 AM MST | Areal Flood Advisory | TWC | Pima | 3 hr |
| Aug 14, 1:53 PM MST | Areal Flood Advisory | TWC | Pinal | 112 min |
| Aug 14, 2:19 PM MST | Flash Flood Warning | TWC | Pinal | 116 min |
| Aug 14, 2:53 PM MST | Areal Flood Advisory | TWC | Santa Cruz | 3 hr |
| Aug 14, 3:19 PM MST | Areal Flood Advisory | TWC | Pima | 3 hr |
| Aug 14, 3:23 PM MST | Areal Flood Advisory | TWC | Pima | 3 hr |
| Aug 14, 3:23 PM MST | Flash Flood Warning | TWC | Santa Cruz | 2 hr |
| Aug 14, 3:25 PM MST | Flash Flood Warning | TWC | Cochise | 3 hr |
| Aug 14, 3:28 PM MST | Areal Flood Advisory | TWC | Pinal | 3 hr |
| Aug 14, 3:56 PM MST | Special Weather Statement | TWC | Cochise | 49 min |
| Aug 14, 4:01 PM MST | Flash Flood Warning | TWC | Cochise | 3 hr |
| Aug 14, 4:18 PM MST | Areal Flood Advisory | TWC | Cochise | 3 hr |
| Aug 14, 4:36 PM MST | Areal Flood Advisory | TWC | Pima | 114 min |
| Aug 14, 4:40 PM MST | Areal Flood Advisory | TWC | Pima | 2 hr |
Nearby
Flash Flood Warnings in Arizona, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.