Alert archive / Arizona / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 1, NWS Tucson, AZ
NWS Tucson, AZ issued this severe thunderstorm warning at Jul 11, 1990, 9:10 PM MST for Pima County, Arizona. It was in force for 65 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jul 11, 1990, 9:10 PM MST (04:10 UTC)
- Expired
- Jul 11, 1990, 10:15 PM MST
- In force
- 65 min
- Issued by
- NWS Tucson, AZ
- Area
- Whole counties
County Pima County, AZ
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 11, 9:10 PM MST | Thunderstorm Wind 0 | Pima, AZ |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Tuscon, AZ (KTUS), launched 00:00Z, 4.2 hours before the alert went out and 84 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
- 882 J/kg
- Mixed-layer CIN
- -37 J/kg
- Mixed-layer LCL
- 2508 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- -17 m²/s²
- 0-3 km storm-relative helicity
- 50 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 KTUS 120410 SVRTUS AZC019-120515- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TUCSON ARIZONA 910 PM MST WED JUL 11 1990 THE NATIONAL WEATHER SERVICE IN TUCSON ARIZONHAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1015 PM MST FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTH CENTRAL ARIZONA ...EASTERN PIMA COUNTY AT 905 PM TUCSON WEATHER SERVICE RADAR INDICATED A SEVERE THUNDERSTORM 20 MILES EAST OF THE METROPOLITAN TUCSON AREA. THIS STORM IS MOVING TO THE WEST AT ABOUT 15 MPH AND SHOULD BEGIN TO EFFECT THE METRO AREA WITHIN THE HOUR. SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...DESTRUCTIVE HAIL...DEADLY LIGHT1NING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. NORDQUIST/HANSEN
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, Jul 11, 4:08 PM MST, 5 hours 2 minutes before
AZZ009>010-120030- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TUCSON AZ 410 PM MST WED JUL 11 1990 AT 400 PM WEATHER RADAR INDICATED AN AREA OF THUNDERSTORMS OVER SANTA CRUZ COUNTY. THE STRONGEST THUNDERSTORMS ARE LOCATED JUST EAST OF NOGALES AND THE GREEN VALLEY AREA. THESE STORMS ARE MOVING SLOWLY TO THE NORTHWEST AT 5-10 MPH. PEOPLE ENGAGED IN OUTDOOR ACTIVETY IN THE SANTA CRUZ COUNTY AREA SHOULD EXERCISE CAUTION IN AREAS OF THUNDE_RSTORMS. AVOID NORMALLY DRY WASHES AND CREEKS THAT COULD BECOME FLOODED DUE TO HEAVY RAIN. THESE STORMS COULD ALSO CONTAIN STRONG GUSTY WINDS...HAIL...AND FREQUENT AND DANGEROUS LIGHTNING. ROBINSON
Special weather statement, Jul 11, 5:26 PM MST, 3 hours 44 minutes before
AZZ009>010-120200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TUCSON AZ 520 PM MST WED JUL 11 1990 AT 515 PM WEATHER RADAR INDICATED THUNDERSTORMS OVER PIMA...COCHISE... AND SANTA CRUZ COUNTIES. THE STRONGEST THUNDERSTORMS ARE LOCATED JUST WEST OF NOGALES AND NORTH OF SONOITA ALONG STATE HIGHWAY 83. THESE STORMS ARE MOVING WEST NORTHWEST AT 5 TO 10 MPH AND COULD EFFECT THE TUCSON METROPOLITAN AREA IN THE NEXT 1 TO 2 HOURS. PEOPLE ENGAGED IN OUTDOOR ACTIVETY IN AREAS NEARBY THUNDERSTORMS SHOULD EXERCISE CAUTION. AVOID NORMALLY DRY WASHES AND CREEKS THAT COULD BECOME FLOODED DUE TO HEAVY RAIN. THESE STORMS MAY ALSO CONTAIN STRONG GUSTY WINDS...HAIL...AND FREQUENT AND DANGEROUS LIGHTNING. ROBINSON
Special weather statement, Jul 11, 8:14 PM MST, 56 minutes before
AZZ009>010-120500- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TUCSON AZ 810 PM MST WED JUL 11 1990 AT 800 PM WEATHER RADAR INDICATED THUNDERSTORMS OVER PIMA...COCHISE... AND SANTA CRUZ COUNTIES. A LINE OF THUNDERSTORMS HAS DEVELOPED JUST TO THE SOUTH OF TUCSON...EXTENDING FROM REDDINGTON PASS SOUTHWESTWARD TO GREEN VALLEY. THESE STORMS ARE DUMPING MODERATE TO HEAVY RAIN AND ARE ACCOMPANIED BY ALMOST CONTINUOUS IN-CLOUD AND CLOUD-TO-GROUND LIGHTNING. THESE STORMS ARE MOVING WEST AT 5 TO 10 MPH. IF YOU ARE DRIVING IN AREAS EXPERIENCING THUNDERSHOWERS...BE CAUTIOUS OF DIPS AND NORMALLY DRY WASHES THAT MAY BECOME FLOODED. THESE STORMS WILL HAVE HEAVY RAIN...STRONG GUSTY WINDS...AND FREQUENT AND DANGEROUS LIGHTNING. ROBINSON
Nearby
Severe Thunderstorm Warnings in Arizona, 1990Every severe thunderstorm 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.