Alert archive / Arizona / Severe Thunderstorm Warnings in 1993
Severe Thunderstorm Warning 13, NWS Phoenix, AZ
NWS Phoenix, AZ issued this severe thunderstorm warning at Aug 20, 1993, 7:06 PM MST for Maricopa County, Arizona. It was in force for 69 min.
The area
The counties it named.
The facts
- Issued
- Aug 20, 1993, 7:06 PM MST (02:06 UTC)
- Expired
- Aug 20, 1993, 8:15 PM MST
- In force
- 69 min
- Issued by
- NWS Phoenix, AZ
- Area
- Whole counties
County Maricopa County, AZ
The radar
The Phoenix radar (KIWA), 77 km from the middle of the area, began a volume at 02:06 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 00:00Z, 2.1 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
- 360 J/kg
- Mixed-layer CIN
- -23 J/kg
- Mixed-layer LCL
- 2489 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- 13 m²/s²
- 0-3 km storm-relative helicity
- 48 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS1 KPHX 210208 SVRPSR AZC013-210315- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE PHOENIX AZ 706 PM MST FRI AUG 20 1993 THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 815 PM MST FOR PEOPLE IN THE FOLLOWING LOCATIONS...... IN SOUTH CENTRAL ARIZONA ...EASTERN MARICOPA COUNTY NATIONAL WEATHER SERVICE RADAR AT 700 PM SHOWED A STRONG THUNDERSTORM WITH INTENSE RAINFALL LOCATED OVER OVER THE FOUNTAIN HILLS AREA. THIS STORM WAS MOVING TO THE NORTH-NORTHEAST AT ABOUT 20 MPH. THIS STORM WILL LIKELY AFFECT THE EASTERN PARADISE VALLEY AREA...AS WELL AS FORT MCDOWELL PARK AND INDIAN RESERVATION. THIS STORM COULD AFFECT THE CAREFREE AND CAVE CREEK AREAS AS WELL AS IT MOVES TO THE NORTH. THIS IS A DANGEROUS STORM AND WILL LIKELY PRODUCE STRONG DAMAGING WINDS IN EXCESS OF 57 MPH AS WELL AS INTENSE RAIN AND MODERATE TO LARGE HAIL. PERSONS IN THE FAR NORTHEASTERN PHOENIX METRO AREA SHOULD KEEP A CLOSE EYE ON THE SKY AND BE PREPARED TO SEEK SHELTER SHOULD THREATENING WEATHER APPROACH. SEVERE THUNDERSTORMS CAUSE DAMAGING WINDS...LARGE HAIL AND DEADLY LIGHTNING. MOVE INSIDE A REINFORCED BUILDING OR STORM SHELTER. GO TO AN INTERIOR ROOM OR HALLWAY ON THE LOWEST FLOOR. STAY AWAY FROM WINDOWS. WATCH OUT FOR FLASH FLOODING. STAY AWAY FROM STREAMS AND AVOID NARROW STEEP WALLED CANYONS. DONT DRIVE ACROSS FLOODED STREAMS OR WASHES... OR INTO FLOODED CITY STREETS OR UNDERPASSES. BRECKENRIDGE
What forecasters said that day
The local office's own words before this severe thunderstorm 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, Aug 20, 1:59 PM MST, 5 hours 7 minutes before
AZZALL-202300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PHOENIX AZ 159 PM MST FRI AUG 20 1993 ...STRONG THUNDERSTORMS DEVELOPING ACROSS FAR NORTHERN YAVAPAI COUNTY... STRONG THUNDERSTORMS WERE SHOWING UP ON PHOENIX WEATHER RADAR OVER NORTHERN YAVAPAI COUNTY AT 155 PM MST. THE STRONGEST STORM WAS EAST OF CHINO VALLEY AND PAULDEN AND WAS MOVING TOWARDS THE NORTHEAST AT ABOUT 20 MPH. THIS STORM WAS CAPABLE OF PRODUCING VERY HEAVY RAINFALL...WIND GUSTS TO NEAR 45 MPH ALONG WITH SMALL HAIL. DANGEROUS CLOUD TO GROUND LIGHTNING IS ALSO A DEFINITE THREAT WITH THIS THUNDERSTORM. PERSONS ALONG THE PATH OF THIS STORM SHOULD TAKE SHELTER IF THE THUNDERSTORM APPROACHES. IF IT CONTINUES TO MOVE ALONG ITS PRESENT COURSE...THE STORM WILL MOVE INTO SOUTHERN COCONINO COUNTY NEAR BILL WILLIAMS MOUNTAIN BEFORE 245 PM MST. CAMPERS AND HIKERS IN THE AREA ...INCLUDING THE POPULAR SYCAMORE CREEK CANYON...SHOULD KEEP AN EYE ON THE SKIES AND TAKE COVER UNTIL THE STORM PASSES. MEANWHILE...THE AIR MASS CONTINUES TO BE VERY MOIST AND UNSTABLE THIS AFTERNOON...WITH THUNDERSTORMS POSSIBLE ACROSS THE ENTIRE STATE. SOME OF THEM COULD PRODUCE BRIEF VERY HEAVY RAIN AND GUSTY WINDS. IF OUTDOOR INTERESTS ARE BEING PLANNED ANYWHERE IN THE STATE THROUGH THIS EVENING...IT WOULD BE GOOD TO LISTEN TO YOUR FAVORITE WEATHER INFORMATION SOURCE FOR UP TO THE MINUTE STATEMENTS OR POSSIBLE WARNINGS. ESTLE
Special weather statement, Aug 20, 2:01 PM MST, 5 hours 5 minutes before
AZZALL-202300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PHOENIX AZ 159 PM MST FRI AUG 20 1993 ...STRONG THUNDERSTORMS DEVELOPING ACROSS FAR NORTHERN YAVAPAI COUNTY... STRONG THUNDERSTORMS WERE SHOWING UP ON PHOENIX WEATHER RADAR OVER NORTHERN YAVAPAI COUNTY AT 155 PM MST. THE STRONGEST STORM WAS EAST OF CHINO VALLEY AND PAULDEN AND WAS MOVING TOWARDS THE NORTHEAST AT ABOUT 20 MPH. THIS STORM WAS CAPABLE OF PRODUCING VERY HEAVY RAINFALL...WIND GUSTS TO NEAR 45 MPH ALONG WITH SMALL HAIL. DANGEROUS CLOUD TO GROUND LIGHTNING IS ALSO A DEFINITE THREAT WITH THIS THUNDERSTORM. PERSONS ALONG THE PATH OF THIS STORM SHOULD TAKE SHELTER IF THE THUNDERSTORM APPROACHES. IF IT CONTINUES TO MOVE ALONG ITS PRESENT COURSE...THE STORM WILL MOVE INTO SOUTHERN COCONINO COUNTY NEAR BILL WILLIAMS MOUNTAIN BEFORE 245 PM MST. CAMPERS AND HIKERS IN THE AREA ...INCLUDING THE POPULAR SYCAMORE CREEK CANYON...SHOULD KEEP AN EYE ON THE SKIES AND TAKE COVER UNTIL THE STORM PASSES. MEANWHILE...THE AIR MASS CONTINUES TO BE VERY MOIST AND UNSTABLE THIS AFTERNOON...WITH THUNDERSTORMS POSSIBLE ACROSS THE ENTIRE STATE. SOME OF THEM COULD PRODUCE BRIEF VERY HEAVY RAIN AND GUSTY WINDS. IF OUTDOOR INTERESTS ARE BEING PLANNED ANYWHERE IN THE STATE THROUGH THIS EVENING...IT WOULD BE GOOD TO LISTEN TO YOUR FAVORITE WEATHER INFORMATION SOURCE FOR UP TO THE MINUTE STATEMENTS OR POSSIBLE WARNINGS. ESTLE
Special weather statement, Aug 20, 3:45 PM MST, 3 hours 21 minutes before
AZZALL-210015- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PHOENIX ARIZONA 345 PM MST FRI AUG 20 1993 ...STRONG THUNDERSTORMS OVER PROTIONS OF PINAL AND WESTERN GRAHAM COUNTIES... AT 330 PM MST...WEATHER RADAR SHOWED A FEW STRONG THUNDERSTORMS WITH HEAVY RAINFALL AND GUSTY WINDS OVER PORTIONS OF EASTERN PINAL AND WESTERN GRAHAM COUNTIES. THESE STORMS EXTENDED FROM ABOUT 15 MILES NORTHWEST OF SAFFORD TO NEAR SAN MANUEL. MOVEMENT WAS GENERALLY TO THE NORTH-NORTHEAST AT 15 MILES AN HOUR. THESE STORMS WILL BE MOVING OVER SECTIONS OF HIGHWAY 70 FROM SAN CARLOS LAKE TO SAFFORD BETWEEN 350 PM AND 430 PM MST. MOTORISTS TRAVELING ON HIGHWAY 70 SHOULD BE PREPARED FOR BRIEF HEAVY RAINFALL AND GUSTY WINDS. OTHER STRONG THUNDERSTORMS WERE MOVING INTO SOUTH CENTRAL PINAL COUNTY ABOUT 25 MILES SOUTHEAST OF CASA GRANDE. THESE STORMS WERE ALSO MOVING TO THE NORTH-NORTHEAST AT 15 MILES AN HOUR. STAY TUNED TO NOAA WEATHER RADIO OR LOCAL RADIO AND TELEVISION FOR LATER STATEMENTS ISSUED BY THE NATIONAL WEATHER SERVICE. JD
Special weather statement, Aug 20, 3:47 PM MST, 3 hours 19 minutes before
AZZALL-210015- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PHOENIX ARIZONA 345 PM MST FRI AUG 20 1993 ...STRONG THUNDERSTORMS OVER PROTIONS OF PINAL AND WESTERN GRAHAM COUNTIES... AT 330 PM MST...WEATHER RADAR SHOWED A FEW STRONG THUNDERSTORMS WITH HEAVY RAINFALL AND GUSTY WINDS OVER PORTIONS OF EASTERN PINAL AND WESTERN GRAHAM COUNTIES. THESE STORMS EXTENDED FROM ABOUT 15 MILES NORTHWEST OF SAFFORD TO NEAR SAN MANUEL. MOVEMENT WAS GENERALLY TO THE NORTH-NORTHEAST AT 15 MILES AN HOUR. THESE STORMS WILL BE MOVING OVER SECTIONS OF HIGHWAY 70 FROM SAN CARLOS LAKE TO SAFFORD BETWEEN 350 PM AND 430 PM MST. MOTORISTS TRAVELING ON HIGHWAY 70 SHOULD BE PREPARED FOR BRIEF HEAVY RAINFALL AND GUSTY WINDS. OTHER STRONG THUNDERSTORMS WERE MOVING INTO SOUTH CENTRAL PINAL COUNTY ABOUT 25 MILES SOUTHEAST OF CASA GRANDE. THESE STORMS WERE ALSO MOVING TO THE NORTH-NORTHEAST AT 15 MILES AN HOUR. STAY TUNED TO NOAA WEATHER RADIO OR LOCAL RADIO AND TELEVISION FOR LATER STATEMENTS ISSUED BY THE NATIONAL WEATHER SERVICE. JD
Special weather statement, Aug 20, 4:23 PM MST, 2 hours 43 minutes before
AZZALL-210015- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PHOENIX ARIZONA 423 PM MST FRI AUG 20 1993 ...THUNDERSTORMS PRODUCING VERY HEAVY RAINFALL OVER ARAVAIPA CREEK IN SOUTHWEST GRAHAM COUNTY... AT 415 PM MST...NATIONAL WEATHER SERVICE RADAR SHOWED STRONG THUNDERSTORMS OVER THE CORONADO NATIONAL FOREST IN SOUTHWEST GRAHAM COUNTY. RADAR DERIVED RAINFALL ESTIMATES INDICATED THAT UP TO NEAR 2.0 INCHES OF RAIN HAD FALLEN DURING THE PAST 3 HOURS OVER PORTIONS OF ARAVAIPA CREEK AROUND KLONOYKE. STRONG THUNDERSTORMS TO THE SOUTHWEST OF THE CORONADO NATIONAL FOREST ARE EXPECTED TO MOVE NORTHEAST OVER THE ARAVAIPA VALLEY...BRINGING ADDITIONAL RAINFALL. CAMPERS ALONG THE CREEK SHOULD BE PREPARED FOR POSSIBLE FLOODING OF LOW AREAS. IF RISING WATER IS NOTED ALONG THE CREEK...MOVE TO HIGHER GROUND. STAY TUNED TO NOAA WEATHER RADIO OR LOCAL RADIO AND TELEVISION FOR LATER STATEMENTS ISSUED BY THE NATIONAL WEATHER SERVICE. JD
Special weather statement, Aug 20, 4:26 PM MST, 2 hours 40 minutes before
AZZALL-210015- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PHOENIX ARIZONA 423 PM MST FRI AUG 20 1993 ...THUNDERSTORMS PRODUCING VERY HEAVY RAINFALL OVER ARAVAIPA CREEK IN SOUTHWEST GRAHAM COUNTY... AT 415 PM MST...NATIONAL WEATHER SERVICE RADAR SHOWED STRONG THUNDERSTORMS OVER THE CORONADO NATIONAL FOREST IN SOUTHWEST GRAHAM COUNTY. RADAR DERIVED RAINFALL ESTIMATES INDICATED THAT UP TO NEAR 2.0 INCHES OF RAIN HAD FALLEN DURING THE PAST 3 HOURS OVER PORTIONS OF ARAVAIPA CREEK AROUND KLONOYKE. STRONG THUNDERSTORMS TO THE SOUTHWEST OF THE CORONADO NATIONAL FOREST ARE EXPECTED TO MOVE NORTHEAST OVER THE ARAVAIPA VALLEY...BRINGING ADDITIONAL RAINFALL. CAMPERS ALONG THE CREEK SHOULD BE PREPARED FOR POSSIBLE FLOODING OF LOW AREAS. IF RISING WATER IS NOTED ALONG THE CREEK...MOVE TO HIGHER GROUND. STAY TUNED TO NOAA WEATHER RADIO OR LOCAL RADIO AND TELEVISION FOR LATER STATEMENTS ISSUED BY THE NATIONAL WEATHER SERVICE. JD
The office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 20, 5:45 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 60 min |
Nearby
Severe Thunderstorm Warnings in Arizona, 1993Every severe thunderstorm warning in 1993
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.