Alert archive / Arizona / Flash Flood Warnings in 2011
Flash Flood Warning 16, NWS Tucson, AZ
NWS Tucson, AZ issued this flash flood warning at Jul 20, 2011, 4:25 PM MST for Cochise County, Arizona. It was in force for 110 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 20, 2011, 4:25 PM MST (23:25 UTC)
- Expired
- Jul 20, 2011, 6:15 PM MST
- In force
- 110 min
- Issued by
- NWS Tucson, AZ
- Area
- Storm-based polygon
- Flood severity
- None
County Cochise County, AZ
The radar
The Tucson radar (KEMX), 60 km from the middle of the area, began a volume at 23:28 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, 11.4 hours before the alert went out and 100 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
- 357 J/kg
- Mixed-layer CIN
- -54 J/kg
- Mixed-layer LCL
- 1606 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- 12 m²/s²
- 0-3 km storm-relative helicity
- 56 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
087
WGUS55 KTWC 202325
FFWTWC
AZC003-210115-
/O.NEW.KTWC.FF.W.0016.110720T2325Z-110721T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
425 PM MST WED JUL 20 2011
THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTHWESTERN COCHISE COUNTY IN SOUTHEAST ARIZONA...
* UNTIL 615 PM MST
* AT 419 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
LOCALLY HEAVY RAINFALL OVER PORTIONS OF THE MONUMENT BURN
AREA...ESPECIALLY ON THE SOUTHERN END NEAR THE CORONADO NATIONAL
MEMORIAL. ADDITIONAL SHOWERS AND A FEW THUNDERSTORMS WILL
CONTINUE TO DEVELOP THE NEXT HOUR WHICH COULD LEAD TO FLASH
FLOODING IN AREAS THAT ALREADY RECEIVED HEAVY RAINFALL EARLIER
THIS AFTERNOON...PARTICULARY NEAR MILLER CANYON.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO RAMSEY
CANYON PRESERVE...NICKSVILLE...AND MILLER CANYON.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF WASHES
AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES AS
WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.
&&
LAT...LON 3148 11023 3134 11022 3134 11034 3144 11043
3149 11037
$$
!3 follow-up statements
608
WGUS75 KTWC 210004
FFSTWC
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
504 PM MST WED JUL 20 2011
AZC003-210115-
/O.CON.KTWC.FF.W.0016.000000T0000Z-110721T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
COCHISE AZ-
504 PM MST WED JUL 20 2011
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 615 PM MST FOR
SOUTHWESTERN COCHISE COUNTY...INCLUDING THE MONUMENT BURN AREA...
AT 456 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE AN AREA OF SHOWERS AND A FEW THUNDERSTORMS AROUND SIERRA
VISTA AND IN THE HUACHUCA MOUNTAINS. THE HEAVIEST RAINFALL WAS
LOCATED ON THE NORTHERN END OF THE HUACHUCA MOUNTAIN RANGE...WITH
SHOWERS DISSIPATING ALONG THE SOUTHERN END NEAR CORONADO NATIONAL
MEMORIAL.
THIS AREA OF RAINFALL WAS A SLOWLY MOVING SOUTHWARD WITH ADDITIONAL
SHOWERS AND THUNDERSTORMS DEVELOPING OVER THE MONUMENT BURN AREA
THROUGH 615 PM MST.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS
AND STREAMS...COUNTY ROADS...AS WELL AS LOW-LYING AREAS ALONG THE
BANKS OF CREEKS AND STREAMS.
&&
LAT...LON 3148 11023 3134 11022 3134 11034 3144 11043
3149 11037
$$128
WGUS75 KTWC 210040
FFSTWC
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
540 PM MST WED JUL 20 2011
AZC003-210115-
/O.CON.KTWC.FF.W.0016.000000T0000Z-110721T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
COCHISE AZ-
540 PM MST WED JUL 20 2011
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 615 PM MST FOR
SOUTHWESTERN COCHISE COUNTY...
AT 532 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED
TO INDICATE SHOWERS AND A FEW THUNDERSTORMS ACROSS SOUTHWESTERN
COCHISE COUNTY. THESE SHOWERS AND THUNDERSTORMS WERE DECREASING IN
INTENSITY AND COVERAGE WITH MOST OF THE ACTIVITY DISSIPATING OVER
THE BURN AREA.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.
&&
LAT...LON 3148 11023 3134 11022 3134 11034 3144 11043
3149 11037
$$781
WGUS75 KTWC 210110
FFSTWC
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
610 PM MST WED JUL 20 2011
AZC003-210117-
/O.EXP.KTWC.FF.W.0016.000000T0000Z-110721T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
COCHISE AZ-
610 PM MST WED JUL 20 2011
...THE FLASH FLOOD WARNING WILL EXPIRE AT 615 PM MST FOR SOUTHWESTERN
COCHISE COUNTY...
SHOWERS AND THUNDERSTORMS CONTINUED TO DIMINISH IN INTENSITY AND
COVERAGE ACROSS SOUTHWESTERN COCHISE COUNTY. SOME AREAS MAY STILL
EXPERIENCE ELEVATED FLOWS IN NORMALLY DRY WASHES AND CREEKS AS WELL
AS PONDING OF WATER ON ROADS FOR THE NEXT HOUR OR SO. OTHERWISE...
HEAVY RAINFALL HAD ENDED IN SOUTHWESTERN COCHISE COUNTY.
LAT...LON 3148 11023 3134 11022 3134 11034 3144 11043
3149 11037
$$The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 19, 7:27 PM MST | Areal Flood Advisory | TWC | Pima | 2 hr |
| Jul 19, 9:07 PM MST | Areal Flood Advisory | TWC | Pima | 113 min |
| Jul 20, 2:24 PM MST | Areal Flood Advisory | TWC | Cochise | 81 min |
| Jul 20, 2:53 PM MST | Areal Flood Advisory | TWC | Pima | 112 min |
| Jul 20, 3:58 PM MST | Severe Thunderstorm Warning | TWC | Cochise | 32 min |
| Jul 20, 4:01 PM MST | Severe Thunderstorm Warning | TWC | Cochise | 29 min |
| Jul 20, 4:47 PM MST | Severe Thunderstorm Warning | TWC | Pima, Santa Cruz | 28 min |
Nearby
Flash Flood Warnings in Arizona, 2011Every flash flood warning in 2011
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.