Alert archive / Arizona / Flash Flood Warnings in 1990
Flash Flood Warning 20, NWS Phoenix, AZ
NWS Phoenix, AZ issued this flash flood warning at Jul 15, 1990, 4:41 AM MST for Pinal County, Arizona. It was in force for 4 hr.
The area
The counties it named.
The facts
- Issued
- Jul 15, 1990, 4:41 AM MST (11:41 UTC)
- Expired
- Jul 15, 1990, 9:00 AM MST
- In force
- 4 hr
- Issued by
- NWS Phoenix, AZ
- Area
- Whole counties
County Pinal 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, 11.7 hours before the alert went out and 92 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
- 146 J/kg
- Mixed-layer CIN
- -17 J/kg
- Mixed-layer LCL
- 1914 m above ground
- 0-6 km bulk shear
- 5 kt
- 0-1 km storm-relative helicity
- -1 m²/s²
- 0-3 km storm-relative helicity
- -3 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 151145 FFWPHX AZC021-151600- BULLETIN - EBS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE PHOENIX ARIZONA 441 AM MST SUN JUL 15 1990 THE NATIONAL WEATHER SERVICE IN PHOENIX ARIZONA HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 900 AM MST FOR THE FOLLOWING LOCATIONS...... IN SOUTH CENTRAL ARIZONA ...PINAL COUNTY...INCLUDING THE HIGHWAYS CONNECTING CASA GRANDE...COOOLIDGE...FLORENCE...AS WELL AS OTHER SMALLER COMMUNITIES IN THE COUNTY. A LARGE THUNDERSTORM COMPLEX WITH INTENSE RAINFALL DEVELOPED OVER PINAL COUNTY DURING THE PAST HOUR. AN AUTOMATIC RAIN GAUGE 7 MILES NORTH OF FLORENCE RECORDED 2.04 INCHES OF RAIN IN ONE HOUR. AN OBSERVER IN THE CITY OF FLORENCE REPORTED 1.64 INCHES IN 30 MINUTES. FLORENCE POLICE AUTHORITIES REPORT MAIN STREET IS FLOODED WITH WATER RUNNING OVER THE CURB INTO THE BUSINESSES. SATELLITE AND RADAR INFORMATION SUGGEST INTENSE RAINFALL COULD OR SHORTLY OCCUR IN OTHER PINAL COUNTY CITIES LIKE COOLIDGE...CASA GRANDE...AND ELOY. HIGHWAYS AND ROADWAYS CONNECTING THE PINAL COUNTY COMMUNITIES MAY ALSO BE FLOODED. THIS IS A DANGEROUS SITUATION. RESIDENTS AND TRAVELLERS SHOULD CONSIDER DELAYING TRAVEL FOR SEVERAL HOURS. THIS THUNDERSTORM COMPLEX IS DRIFTING SOUTHEAST AT 10 MPH TOWARDS TUCSON. FLASH FLOODING IS ALREADY HAPPENING OR ABOUT TO HAPPEN. MOVE AWAY FROM STREAMS OR WASHES. HEAD FOR HIGHER GROUND. ON THE HIGHWAY...SLOW DOWN AND KEEP A SHARP LOOKOUT AHEAD FOR FLOODING. URBAN FLOODING IS OVERFLOW OF CITY STREETS AND DRAINAGE SYSTEMS... ENOUGH TO FLOOD RESIDENCES AND BUSINESSES AND CLOSE CITY STREETS. POSTPONE ANY UNNECESSARY DRIVING UNTIL THE STORM IS OVER. VASQUEZ
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, Jul 15, 2:37 AM MST, 2 hours 4 minutes before
AZZ008>010-141030- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PHOENIX AZ 235 PM MST SUN JUL 15 1990 ...SCATTERED THUNDERSTORMS...SOME WITH HEAVY RAINS AND HIGH WINDS DEVELOPING OVER CENTRAL ARIZONA THIS MORNING... AT 230 AM SATELLITE PICTURES AND RADAR INDICATED THUNDERSTORMS DEVELOPING OVER MOST OF PINAL COUNTY AND SOUTHERN MARICOPA COUNTY. THESE THUNDERSTORMS WERE MOVING SLOWLY TO THE SOUTH AT AROUND 10 TO 20 MPH. SOME OF THESE STORMS MAY PRODUCE VERY HEAVY RAINS... GUSTY WINDS...AND DANGEROUS LIGHTNING. SOME OF THE HEAVIEST THUNDERSTORM ACTIVITY IS LOCATED IN WESTERN PINAL COUNTY...AND SOUTHEAST MARICOPA COUNTY...BETWEEN CASA GRANDE AND GILA BEND...AND JUST SOUTH OF THE PHOENIX AREA. THIS ACTIVITY SHOULD MOVE SLOWLY SOUTH OVER THE NEXT COUPLE OF HOURS AND COULD PRODUCE STRONG WINDS FROM 30 TO NEAR 50 MPH...ALONG WITH LOCALLY > HEAVY RAINS WITH SOME LOCALIZED STREET FLOODING. THIS ACTIVITY SHOULD DIMINISH OVER THE NEXT FEW HOURS...HOWEVER SCATTERED THUNDERSTORMS COULD CONTINUE TO DEVELOP OVER MOST OF SOUTHEAST ARIZONA THROUGH THE EARLY MORNING HOURS. STAY TUNED TO YOUR NOAA WEATHER RADIO OR OTHER BROADCASTS FOR ANY UPDATES OR WARNINGS. BRECKENRIDGE
Special weather statement, Jul 15, 2:40 AM MST, 2 hours 1 minute before
AZZ008>010-141030- SPECIAL WEATHER STATEMENT...CORRECTED NATIONAL WEATHER SERVICE PHOENIX AZ 235 AM MST SUN JUL 15 1990 ...SCATTERED THUNDERSTORMS...SOME WITH HEAVY RAINS AND HIGH WINDS DEVELOPING OVER CENTRAL ARIZONA THIS MORNING... AT 230 AM SATELLITE PICTURES AND RADAR INDICATED THUNDERSTORMS DEVELOPING OVER MOST OF PINAL COUNTY AND SOUTHERN MARICOPA COUNTY. THESE THUNDERSTORMS WERE MOVING SLOWLY TO THE SOUTH AT AROUND 10 TO 20 MPH. SOME OF THESE STORMS MAY PRODUCE VERY HEAVY RAINS... GUSTY WINDS...AND DANGEROUS LIGHTNING. SOME OF THE HEAVIEST THUNDERSTORM ACTIVITY IS LOCATED IN WESTERN PINAL COUNTY...AND SOUTHEAST MARICOPA COUNTY...BETWEEN CASA GRANDE AND GILA BEND...AND JUST SOUTH OF THE PHOENIX AREA. THIS ACTIVITY SHOULD MOVE SLOWLY SOUTH OVER THE NEXT COUPLE OF HOURS AND COULD PRODUCE STRONG WINDS FROM 30 TO NEAR 50 MPH...ALONG WITH LOCALLY > HEAVY RAINS WITH SOME LOCALIZED STREET FLOODING. THIS ACTIVITY SHOULD DIMINISH OVER THE NEXT FEW HOURS...HOWEVER SCATTERED THUNDERSTORMS COULD CONTINUE TO DEVELOP OVER MOST OF SOUTHEAST ARIZONA THROUGH THE EARLY MORNING HOURS. STAY TUNED TO YOUR NOAA WEATHER RADIO OR OTHER BROADCASTS FOR ANY UPDATES OR WARNINGS. BRECKENRIDGE
Special weather statement, Jul 15, 2:43 AM MST, 1 hour 58 minutes before
AZZ008>010-141030- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PHOENIX AZ 235 PM MST SUN JUL 15 1990 ...SCATTERED THUNDERSTORMS...SOME WITH HEAVY RAINS AND HIGH WINDS DEVELOPING OVER CENTRAL ARIZONA THIS MORNING... AT 230 AM SATELLITE PICTURES AND RADAR INDICATED THUNDERSTORMS DEVELOPING OVER MOST OF PINAL COUNTY AND SOUTHERN MARICOPA COUNTY. THESE THUNDERSTORMS WERE MOVING SLOWLY TO THE SOUTH AT AROUND 10 TO 20 MPH. SOME OF THESE STORMS MAY PRODUCE VERY HEAVY RAINS... GUSTY WINDS...AND DANGEROUS LIGHTNING. SOME OF THE HEAVIEST THUNDERSTORM ACTIVITY IS LOCATED IN WESTERN PINAL COUNTY...AND SOUTHEAST MARICOPA COUNTY...BETWEEN CASA GRANDE AND GILA BEND...AND JUST SOUTH OF THE PHOENIX AREA. THIS ACTIVITY SHOULD MOVE SLOWLY SOUTH OVER THE NEXT COUPLE OF HOURS AND COULD PRODUCE STRONG WINDS FROM 30 TO NEAR 50 MPH...ALONG WITH LOCALLY > HEAVY RAINS WITH SOME LOCALIZED STREET FLOODING. THIS ACTIVITY SHOULD DIMINISH OVER THE NEXT FEW HOURS...HOWEVER SCATTERED THUNDERSTORMS COULD CONTINUE TO DEVELOP OVER MOST OF SOUTHEAST ARIZONA THROUGH THE EARLY MORNING HOURS. STAY TUNED TO YOUR NOAA WEATHER RADIO OR OTHER BROADCASTS FOR ANY UPDATES OR WARNINGS. BRECKENRIDGE
The office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 14, 11:07 PM MST | Flash Flood Warning | PSR | Mohave | 3 hr |
| Jul 14, 11:07 PM MST | Severe Thunderstorm Warning | PSR | Mohave | 3 hr |
| Jul 14, 11:13 PM MST | Flash Flood Warning | PSR | Mohave | 3 hr |
| Jul 14, 11:13 PM MST | Severe Thunderstorm Warning | PSR | Mohave | 3 hr |
| Jul 15, 12:44 PM MST | Flash Flood Warning | PSR | La Paz, Yuma | 3 hr |
Nearby
Flash Flood Warnings in Arizona, 1990Every flash flood warning in 1990
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.