Alert archive / Arizona / Flash Flood Warnings in 2021
Flash Flood Warning 121, NWS Tucson, AZ
NWS Tucson, AZ issued this flash flood warning at Aug 13, 2021, 3:56 PM MST for Cochise County, Arizona. It was in force for 5 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 13, 2021, 3:56 PM MST (22:56 UTC)
- Expired
- Aug 13, 2021, 8:30 PM MST
- In force
- 5 hr
- Issued by
- NWS Tucson, AZ
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
County Cochise County, AZ
The radar
The Tucson radar (KEMX), 140 km from the middle of the area, began a volume at 22:58 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
Tuscon, AZ (KTUS), launched 12:00Z, 10.9 hours before the alert went out and 166 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
- 544 J/kg
- Mixed-layer CIN
- -46 J/kg
- Mixed-layer LCL
- 1049 m above ground
- 0-6 km bulk shear
- 1 kt
- 0-1 km storm-relative helicity
- -36 m²/s²
- 0-3 km storm-relative helicity
- -1 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
282
WGUS55 KTWC 132256
FFWTWC
AZC003-140200-
/O.NEW.KTWC.FF.W.0121.210813T2256Z-210814T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Tucson AZ
356 PM MST Fri Aug 13 2021
The National Weather Service in Tucson has issued a
* Flash Flood Warning for...
Northeastern Cochise County in southeastern Arizona...
* Until 700 PM MST.
* At 356 PM MST, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 2 inches of rain
have fallen. Additional rainfall amounts of 1 to 2 inches are
possible in the warned area. Flash flooding is ongoing or expected
to begin shortly.
HAZARD...Life threatening flash flooding. Thunderstorms
producing flash flooding.
SOURCE...Radar.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
* Some locations that will experience flash flooding include...
Portal, Chiricahua National Monument, Paradise, San Simon and
Rucker Canyon.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.
&&
LAT...LON 3181 10905 3173 10907 3173 10948 3210 10949
3232 10942 3238 10929 3239 10905 3207 10905
3203 10905 3200 10905 3190 10905 3187 10905
3184 10905 3183 10905
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
JRM3 follow-up statements
334
WGUS75 KTWC 132357
FFSTWC
Flash Flood Statement
National Weather Service Tucson AZ
457 PM MST Fri Aug 13 2021
AZC003-140200-
/O.CON.KTWC.FF.W.0121.000000T0000Z-210814T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cochise AZ-
457 PM MST Fri Aug 13 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 7 PM MST THIS EVENING
FOR NORTHEASTERN COCHISE COUNTY...
At 457 PM MST, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 1 and 3 inches of rain have
fallen. Additional rainfall amounts of 1 to 2 inches are possible in
the warned area. Flash flooding is ongoing or expected to begin
shortly. Expect significant flows exiting the Chiricahua Mountains
into the evening.
HAZARD...Life threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
Some locations that will experience flash flooding include...
Portal, Chiricahua National Monument, Paradise, San Simon and
Rucker Canyon.
This includes the following streams and drainages...
Fivemile Creek, East Turkey Creek, Happy Camp Wash, Onion Creek,
Whitewater Draw, West Whitetail Creek, Ash Creek, Witch Creek,
Wood Canyon, Stanford Creek, Indian Creek, San Simon River, Turkey
Creek, South Fork Keating Creek, Pinery Creek, Rucker Canyon,
Pridham Creek, Silver Creek, O B Draw, Cave Creek, Big Sand Wash,
East Whitetail Creek and Keating Creek.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.
&&
LAT...LON 3181 10905 3173 10907 3173 10948 3210 10949
3232 10942 3238 10929 3239 10905 3207 10905
3203 10905 3200 10905 3190 10905 3187 10905
3184 10905 3183 10905
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
JRM873
WGUS55 KTWC 140147
FFWTWC
AZC003-140330-
/O.EXT.KTWC.FF.W.0121.000000T0000Z-210814T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Tucson AZ
647 PM MST Fri Aug 13 2021
The National Weather Service in Tucson has extended the
* Flash Flood Warning for...
Northeastern Cochise County in southeastern Arizona...
* Until 830 PM MST.
* At 647 PM MST, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 3 inches of rain
have fallen. Additional rainfall amounts of up to 1 inch are
possible in the warned area. Flash flooding is ongoing or expected
to begin shortly.
HAZARD...Life threatening flash flooding. Thunderstorms
producing flash flooding.
SOURCE...Radar.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
* Some locations that will experience flash flooding include...
Portal, Chiricahua National Monument, Paradise, San Simon and
Rucker Canyon.
This includes the following streams and drainages...
Fivemile Creek, East Turkey Creek, Happy Camp Wash, Onion Creek,
Whitewater Draw, West Whitetail Creek, Ash Creek, Witch Creek,
Wood Canyon, Stanford Creek, Indian Creek, San Simon River, Turkey
Creek, South Fork Keating Creek, Pinery Creek, Rucker Canyon,
Pridham Creek, Silver Creek, O B Draw, Cave Creek, Big Sand Wash,
East Whitetail Creek and Keating Creek.
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.
In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.
&&
LAT...LON 3181 10905 3173 10907 3173 10948 3210 10949
3232 10942 3238 10929 3239 10905 3207 10905
3203 10905 3200 10905 3190 10905 3187 10905
3184 10905 3183 10905
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
JRM159
WGUS75 KTWC 140327
FFSTWC
Flash Flood Statement
National Weather Service Tucson AZ
827 PM MST Fri Aug 13 2021
AZC003-140337-
/O.EXP.KTWC.FF.W.0121.000000T0000Z-210814T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cochise AZ-
827 PM MST Fri Aug 13 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 830 PM MST THIS EVENING FOR
NORTHEASTERN COCHISE COUNTY...
Flash flooding is no longer expected to pose a threat. Please
continue to heed remaining road closures. Flows in washes may
continue well into the night.
A Flash Flood Watch remains in effect until 500 PM MST Sunday for a
portion of Southeast Arizona.
LAT...LON 3181 10905 3173 10907 3173 10948 3210 10949
3232 10942 3238 10929 3239 10905 3207 10905
3203 10905 3200 10905 3190 10905 3187 10905
3184 10905 3183 10905
$$
JRMThe office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 12, 6:10 PM MST | Areal Flood Advisory | TWC | Cochise | 3 hr |
| Aug 12, 6:42 PM MST | Flash Flood Warning | TWC | Cochise | 2 hr |
| Aug 12, 11:08 PM MST | Areal Flood Advisory | TWC | Santa Cruz | 112 min |
| Aug 13, 1:56 PM MST | Areal Flood Advisory | TWC | Cochise, Santa Cruz | 118 min |
| Aug 13, 2:04 PM MST | Areal Flood Advisory | TWC | Santa Cruz | 109 min |
| Aug 13, 2:25 PM MST | Special Weather Statement | TWC | Graham | 50 min |
| Aug 13, 2:42 PM MST | Flash Flood Warning | TWC | Cochise | 3 hr |
| Aug 13, 3:14 PM MST | Special Weather Statement | TWC | Graham | 46 min |
| Aug 13, 3:20 PM MST | Special Weather Statement | TWC | 40 min | |
| Aug 13, 3:30 PM MST | Severe Thunderstorm Warning | TWC | Graham, Pinal | 45 min |
| Aug 13, 4:06 PM MST | Special Weather Statement | TWC | Cochise | 39 min |
| Aug 13, 4:35 PM MST | Special Weather Statement | TWC | Santa Cruz | 25 min |
| Aug 13, 4:37 PM MST | Areal Flood Advisory | TWC | Graham, Greenlee | 113 min |
| Aug 13, 4:43 PM MST | Severe Thunderstorm Warning | TWC | Santa Cruz | 47 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.