Alert archive / Arizona / Flash Flood Warnings in 2021
Flash Flood Warning 87, NWS Tucson, AZ
NWS Tucson, AZ issued this flash flood warning at Aug 2, 2021, 8:14 PM MST for Pima County, Arizona. It was in force for 3 hr. 1 report 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 2, 2021, 8:14 PM MST (03:14 UTC)
- Expired
- Aug 2, 2021, 11:15 PM MST
- In force
- 3 hr
- 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), 21 km from the middle of the area, began a volume at 03:16 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 2, 8:35 PM MST | FLASH FLOOD | 7 Ene Tucson, AZ | SWIFT WATER RESCUE OF 3 PEOPLE NEAR TANQUE VERDE WASH AND BONANZA. |
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 00:00Z, 3.2 hours before the alert went out and 23 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
- 1093 J/kg
- Mixed-layer CIN
- -27 J/kg
- Mixed-layer LCL
- 2632 m above ground
- 0-6 km bulk shear
- 0 kt
- 0-1 km storm-relative helicity
- -18 m²/s²
- 0-3 km storm-relative helicity
- 37 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
394
WGUS55 KTWC 030314
FFWTWC
AZC019-030615-
/O.NEW.KTWC.FF.W.0087.210803T0314Z-210803T0615Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Tucson AZ
814 PM MST Mon Aug 2 2021
The National Weather Service in Tucson has issued a
* Flash Flood Warning for...
East Central Pima County in southeastern Arizona...
* Until 1115 PM MST.
* At 814 PM MST, Doppler radar and automated rain gauges indicated
thunderstorms producing heavy rain across the warned area. Between
1 and 2 inches of rain have fallen with these latest
thunderstorms. This is on top of the rainfall earlier this
evening. Flash flooding is ongoing or expected to begin shortly.
This warning extends in area and time the previous Flash Flood
Warning for the east side of Tucson and replaces the Urban and
Small Stream Advisory for the Vail area.
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, Davis-Monthan Air Force Base, Tanque Verde, Vail, Saguaro
National Park East, Corona De Tucson, Catalina Foothills and Rita
Ranch.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
Remain alert for flooding even in locations not receiving rain.
Washes, streams, and rivers can become raging killer currents in a
matter of minutes, even from distant rainfall.
&&
LAT...LON 3195 11052 3195 11070 3193 11070 3193 11083
3226 11085 3231 11075 3226 11065 3216 11059
FLASH FLOOD...RADAR AND GAUGE INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
GZ1 follow-up statement
152
WGUS75 KTWC 030624
FFSTWC
Flash Flood Statement
National Weather Service Tucson AZ
1124 PM MST Mon Aug 2 2021
AZC019-030634-
/O.EXP.KTWC.FF.W.0087.000000T0000Z-210803T0615Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Pima AZ-
1124 PM MST Mon Aug 2 2021
...FLASH FLOOD WARNING HAS EXPIRED FOR EAST CENTRAL PIMA COUNTY...
Flood waters have receded. The heavy rain has ended. Flooding is no
longer expected to pose a threat. Please continue to heed remaining
road closures.
LAT...LON 3195 11052 3195 11070 3193 11070 3193 11083
3226 11085 3231 11075 3226 11065 3216 11059
$$
GLThe office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 2, 5:15 PM MST | Special Weather Statement | TWC | Santa Cruz | 30 min |
| Aug 2, 5:19 PM MST | Dust Storm Advisory | TWC | Cochise | 41 min |
| Aug 2, 5:33 PM MST | Special Weather Statement | TWC | 42 min | |
| Aug 2, 5:48 PM MST | Special Weather Statement | TWC | 42 min | |
| Aug 2, 5:51 PM MST | Areal Flood Advisory | TWC | Pima | 114 min |
| Aug 2, 5:58 PM MST | Flash Flood Warning | TWC | Pima | 3 hr |
| Aug 2, 6:24 PM MST | Areal Flood Advisory | TWC | Pima | 2 hr |
| Aug 2, 6:26 PM MST | Areal Flood Advisory | TWC | Cochise, Santa Cruz | 2 hr |
| Aug 2, 6:31 PM MST | Special Weather Statement | TWC | 59 min | |
| Aug 2, 6:37 PM MST | Severe Thunderstorm Warning | TWC | Pima | 38 min |
| Aug 2, 6:55 PM MST | Flash Flood Warning | TWC | Pima | 3 hr |
| Aug 2, 7:06 PM MST | Areal Flood Advisory | TWC | Pinal | 114 min |
| Aug 2, 7:06 PM MST | Special Weather Statement | TWC | Cochise | 39 min |
| Aug 2, 7:15 PM MST | Special Weather Statement | TWC | Santa Cruz | 45 min |
| Aug 2, 7:25 PM MST | Special Weather Statement | TWC | 50 min | |
| Aug 2, 7:31 PM MST | Severe Thunderstorm Warning | TWC | Pima | 44 min |
| Aug 2, 8:13 PM MST | Severe Thunderstorm Warning | TWC | Pima | 33 min |
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.