Alert archive / Arizona / Flash Flood Warnings in 1986
Flash Flood Warning 10, NWS Phoenix, AZ
NWS Phoenix, AZ issued this flash flood warning at Oct 11, 1986, 7:40 PM MST for Maricopa County, Arizona. It was in force for 80 min.
The area
The counties it named.
The facts
- Issued
- Oct 11, 1986, 7:40 PM MST (02:40 UTC)
- Expired
- Oct 11, 1986, 9:00 PM MST
- In force
- 80 min
- Issued by
- NWS Phoenix, AZ
- Area
- Whole counties
County Maricopa County, AZ
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Tuscon, AZ (KTUS), launched 00:00Z, 2.7 hours before the alert went out and 198 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
- 87 J/kg
- Mixed-layer CIN
- -31 J/kg
- Mixed-layer LCL
- 1917 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 44 m²/s²
- 0-3 km storm-relative helicity
- 89 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KPHX 120243 FFWPHX AZC013-120400- BULLETIN...EBS ACTIVATION REQUESTED FLASH FLOOD WARNING BULLETIN NATIONAL WEATHER SERVICE PHOENIX AZ 740 PM MST SAT OCT 11 1986 THE NATIONAL WEATHER SERVICE OFFICE IN PHOENIX HAS ISSUED A FLASH FLOOD WARNING UNTIL 900 PM MST SATURDAY FOR PEOPLE IN THE FOLLOWING COUNTY.. CENTRAL ARIZONA..EXTREME NORTHEAST MARICOPA THE FLASH FLOOD WARNING IS FOR EXTREME NORTHEAST MARICOPA COUNTY... INCLUDING THE GREATER PHOENIX METROPOLITAN AREA. AN AREA OF STRONG THUNDERSTORMS WAS MOVING EAST SOUTHEAST THROUGH THE WARNING AREA..AND CAUSING HEAVY RAINFALL WITH FLOODING OF HIGHWAYS..STREETS..WASHES..AND LOW AREAS. THE STORMS WILL PERSIST IN THE WARNING AREA FOR AT LEAST THE NEXT HOUR AND A HALF. < PERSONS IN FLOOD PRONE AREAS SHOULD MOVE TO HIGH GROUND IMMEDIATELY. STAY OUT OF WASHES AND CANYONS IN THE AREA. MOTORISTS OUT AND ABOUT THIS EVENING ARE URGED TO USE CAUTION AND NOT CROSS FLOODED ROADWAYS. FRANJEVIC MWF 10/12/0243Z
What forecasters said that day
The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Oct 11, 2:16 PM MST, 5 hours 24 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PHOENIX AZ 2 PM MST SAT OCT 11 1986 SHOWERS AND THUNDERSTORMS CONTINUE TO INCREASE IN SOUTH CENTRAL YAVAPAI COUNTY. AUTOMATIC RAINGAGE STATIONS HAVE INDICATED MODERATE TO HEAVY RAINFALL IN SOUTH CENTRAL YAVAPAI COUNTY DURING THE PAST HOUR. RAINFALL AMOUNTS FROM ONE HALF TO THREE FOURTHS OF AN INCH HAS OCCURRED IN THE MT.UNION...MAYER..DUGAS AREA..LOCATED JUST NORTH OF CORDES JUNCTION. RADAR CONTINUES TO SHOW A LINE OF MODERATE TO HEAVY SHOWERS AND THUNDERSTORMS IN THAT AREA. THIS LINE IS OCCURRING JUST AHEAD OF A COLD FRONT OVER NORTHERN ARIZONA. PERSONS TRAVELING IN THAT AREA SHOULD BE ALERT FOR POSSIBLE ROAD FLOODING...ESPECIALLY ALONG HIGHWAY 69 FROM CORDES JUNCTON TO PRESCOTT...AND IN LOW SPOTS ALONG INTERSTATE 17 NORTH OF CORDES JUNCTION. PERSONS SHOULD ALSO STAY AWAY FROM WASHES IN THE AREA AS FLASH FLOODING IS POSSIBLE. < PERSONS IN THESE AREAS SHOULD KEEP CURRENT ON THE LATEST WEATHER BROADCAST. BERKOVITZ
Special weather statement, Oct 11, 6:27 PM MST, 1 hour 13 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PHOENIX AZ 620 PM MST SAT OCT 11 1986 ...STRONG THUNDERSTORMS..WITH HEAVY RAIN AND HAIL IN CENTRAL ARIZONA... AT 610 PM MST..SATELLITE PHOTOS AND RADAR INDICATED SCATTERED STRONG THUNDERSTORMS IN CENTRAL ARIZONA. THE STORMS WERE BEING ACCOMPANIED BY ONE HALF INCH HAIL..AND FREQUENT LIGHTNING. ALSO..AUTOMATIC RAIN GAGES IN NORTHERN MARICOPA AND SOUTHERN YAVAPAI COUNTIES HAVE ALREADY RECORDED MODERATE TO HEAVY RAINFALL. ONE GAGE NEAR MORRISTOWN REPORTED NEARLY THREE TENTHS OF AN INCH OF RAIN IN ABOUT A HALF HOUR. GAGES NEAR NEW RIVER..CAVE CREEK..AND CAREFREE REPORTED SIMILAR AMOUNTS IN A SHORT TIME. THE THUNDERSTORMS.. HEAVY SHOWERS..HAIL..AND DANGEROUS LIGHTNING ARE EXPECTED TO PERSIST IN MUCH OF CENTRAL ARIZONA..AT LEAST FOR THE NEXT FEW HOURS. PERSONS TRAVELING IN CENTRAL ARIZONA SHOULD BE ALERT FOR POSSIBLE FLOODING OF ROADWAYS..SMALL CREEKS AND STREAMS..WASHES..AND LOW AREAzS. PERSONS PLANNING ON BEING OUT AND ABOUT IN CENTRAL ARIZONA THIS EVENING ARE URGED TO KEEP IN TOUCH FOR THE LATEST WEATHER FORECASTS..AND POSSIBLE WEATHER BULLETINS. FRANJEVIC MWF 10/12/0127Z
The office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 11, 8:55 PM MST | Flash Flood Warning | PSR | Maricopa, Pinal | 95 min |
Nearby
Flash Flood Warnings in Arizona, 1986Every flash flood warning in 1986
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.