Alert archive / Arizona / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 34, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this severe thunderstorm warning at Aug 11, 2000, 12:46 PM MST for Coconino County, Gila County, Navajo County, Arizona. It was in force for 29 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.
The facts
- Issued
- Aug 11, 2000, 12:46 PM MST (19:46 UTC)
- Expired
- Aug 11, 2000, 1:15 PM MST
- In force
- 29 min
- Issued by
- NWS Flagstaff, AZ
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Coconino County, AZ, Gila County, AZ, Navajo County, AZ
The radar
The Flagstaff radar (KFSX), 53 km from the middle of the area, began a volume at 19:47 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
Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 7.8 hours before the alert went out and 141 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2176 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- 63 m²/s²
- 0-3 km storm-relative helicity
- 2 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
786 WUUS55 KFGZ 111947 SVRFLG AZC005-007-017-112015- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE FLAGSTAFF AZ 1246 PM MST FRI AUG 11 2000 THE NATIONAL WEATHER SERVICE IN FLAGSTAFF HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EXTREME SOUTHEASTERN COCONINO COUNTY IN ARIZONA THIS INCLUDES THE CITIES OF FOREST LAKES AND YOUNG NORTH CENTRAL GILA COUNTY IN ARIZONA SOUTHWESTERN NAVAJO COUNTY IN ARIZONA * UNTIL 115 PM MST * AT 1246 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER FOREST LAKES...OR ABOUT 5 MILES NORTHEAST OF FOREST LAKES...MOVING SOUTH AT 10 MPH. REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN FLAGSTAFF. LAT...LON 3454 11066 3446 11091 3404 11085 3419 11037 $$
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.
NWS Flagstaff, AZ wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 11, 9:00 AM MST, 3 hours 46 minutes earlier.
Area forecast discussion, Aug 11, 9:00 AM MST, 3 hours 46 minutes before
NORTHERN ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FLAGSTAFF AZ 900 AM MST FRI AUG 11 2000 SYNOPSIS...THUNDERSTORMS WILL CONTINUE TO DEVELOP ACROSS NORTHERN ARIZONA EACH DAY THROUGH TUESDAY WITH THE GREATEST ACTIVITY CONTINUING ALONG THE MOGOLLON...RIM WHITE MOUNTAINS AND LOCATIONS SOUTHWARD. THERE WILL BE FEWER THUNDERSTORMS ALONG THE UTAH BORDER AND IN THE NORTHWEST. HIGH PRESSURE WILL SLOWLY BUILD WESTWARD OVER THE WEEKEND...BRINGING AN INCREASE IN MOISTURE AND SHOWER ACTIVITY EACH DAY. DISCUSSION...CURRENT FORECAST IN GOOD SHAPE WITH NO UPDATES. THIS MORNING A MID- TO UPPER-LEVEL RIDGE AXIS EXTENDED FROM SOUTHERN CALIFORNIA INTO THE MIDWEST. LOOKING AT THE MORNING SOUNDINGS ACROSS THE STATE A SLIGHTLY STRONGER VERTICAL SHEAR PATTERN IS IN PLACE THAN ON WEDNESDAY. IN THE MID TO LOWER LEVELS A NORTHERLY COMPONENT IS PRESENT WITH WESTERLY FLOW ABOVE THAT. THIS IS FAVORABLE TO SOUTHWARD PROPAGATION OF STORMS OFF THE MOGOLLON RIM. THERE IS A MID-LEVEL SUBSIDENCE INVERSION BUT THINK MOISTURE VALUES WILL INCREASE ENOUGH TODAY TO OVERCOME THIS CAP. THERE IS AN AREA OF MOISTURE AND CLOUDINESS OVER SOUTHEAST AND EAST CENTRAL ARIZONA. SURFACE OBSERVATIONS SUGGEST THAT QUITE A BIT OF LOW-LEVEL MOISTURE IS FLOWING NORTHWEST ACROSS ARIZONA FROM THE CLOUDY AREA. THIS MOISTURE WILL MIX INTO THE BOUNDARY LAYER AND MEANS ISOLATED TO SCATTERED SHOWERS WILL DEVELOP OVER MUCH OF THE CWA. THE DEEPEST MOISTURE WILL MAKE IT INTO YAVAPAI COUNTY BY THIS AFTERNOON WHERE IT REMAINS MOSTLY SUNNY. WITH SUNNY SKIES AND FLOW ALOFT MORE FAVORABLE TO SOUTHWARD PROPAGATION EXPECT THE MOST WIDESPREAD AND HEAVY RAIN TO OCCUR IN YAVAPAI COUNTY LATER THIS AFTERNOON AND EVENING. CLOUDINESS IN NORTHERN GILA COUNTY WILL LIMIT THE STRENGTH OF THUNDERSTORM ACTIVITY THERE. MCCOLLUM .FGZ...NONE
In the hours before
Special weather statement, Aug 11, 9:26 AM MST, 3 hours 20 minutes before
AZZ004>018-037>040-102030- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE FLAGSTAFF AZ 930 AM MST THU AUG 10 2000 ...STRONG THUNDERSTORMS WITH HEAVY RAIN OVER YAVAPAI COUNTY LATER THIS AFTERNOON AND EVENING... SPOTTER REPORTS OF HAIL...RAINFALL AMOUNTS...AND GUSTY WINDS REQUESTED. HIGH PRESSURE REMAINS CENTERED OVER THE FOUR CORNERS REGION WITH MOISTURE REMAINING IN PLACE ACROSS MOST OF ARIZONA. THIS WILL LEAD TO SCATTERED SHOWER AND THUNDERSTORM ACTIVITY OVER MUCH OF NORTHERN ARIZONA TODAY. THE PRIMARY AREA OF FOCUS TODAY WILL BE YAVAPAI COUNTY WHERE THE COMBINATION OF INCREASING MOISTURE AND SUNNY SKIES WILL MAKE FOR AN ACTIVE THUNDERSTORM DAY. THE FLOW ALOFT WILL PUSH THUNDERSTORMS SOUTHWARD OFF THE MOGOLLON RIM AND AS THEY MOVE INTO THE DEEPER MOISTURE ACROSS YAVAPAI COUNTY WILL STRENGTHEN. THE MAIN THREAT TODAY WILL BE FOR HEAVY RAIN AS MOISTURE VALUES WILL BE QUITE HIGH ACROSS YAVAPAI COUNTY AND STORMS WILL BE SLOW MOVING. THE HAZARDOUS WEATHER OUTLOOK GIVES PRELIMINARY INFORMATION FOR THE POSSIBILITY OF WEATHER THAT COULD BECOME SEVERE...DAMAGING WINDS IN EXCESS OF 57 MPH...HAIL 3/4 INCH IN DIAMETER OR LARGER...AND HEAVY RAINFALL THAT COULD CAUSE FLOODING OR RUNNING WASHES. WHEN HAZARDOUS WEATHER BEGINS...IMPORTANT LIFE SAVING INFORMATION WILL BE PROVIDED IN SHORT TERM FORECASTS...SEVERE WEATHER AND FLOOD WARNINGS ...AND FOLLOW-UP STATEMENTS. MCCOLLUM
Special weather statement, Aug 11, 9:58 AM MST, 2 hours 48 minutes before
AZZ004>018-037>040-102030- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE FLAGSTAFF AZ 930 AM MST THU AUG 10 2000 ...STRONG THUNDERSTORMS WITH HEAVY RAIN OVER YAVAPAI COUNTY LATER THIS AFTERNOON AND EVENING... SPOTTER REPORTS OF HAIL...RAINFALL AMOUNTS...AND GUSTY WINDS REQUESTED. HIGH PRESSURE REMAINS CENTERED OVER THE FOUR CORNERS REGION WITH MOISTURE REMAINING IN PLACE ACROSS MOST OF ARIZONA. THIS WILL LEAD TO SCATTERED SHOWER AND THUNDERSTORM ACTIVITY OVER MUCH OF NORTHERN ARIZONA TODAY. THE PRIMARY AREA OF FOCUS TODAY WILL BE YAVAPAI COUNTY WHERE THE COMBINATION OF INCREASING MOISTURE AND SUNNY SKIES WILL MAKE FOR AN ACTIVE THUNDERSTORM DAY. THE FLOW ALOFT WILL PUSH THUNDERSTORMS SOUTHWARD OFF THE MOGOLLON RIM AND AS THEY MOVE INTO THE DEEPER MOISTURE ACROSS YAVAPAI COUNTY WILL STRENGTHEN. THE MAIN THREAT TODAY WILL BE FOR HEAVY RAIN AS MOISTURE VALUES WILL BE QUITE HIGH ACROSS YAVAPAI COUNTY AND STORMS WILL BE SLOW MOVING. THE HAZARDOUS WEATHER OUTLOOK GIVES PRELIMINARY INFORMATION FOR THE POSSIBILITY OF WEATHER THAT COULD BECOME SEVERE...DAMAGING WINDS IN EXCESS OF 57 MPH...HAIL 3/4 INCH IN DIAMETER OR LARGER...AND HEAVY RAINFALL THAT COULD CAUSE FLOODING OR RUNNING WASHES. WHEN HAZARDOUS WEATHER BEGINS...IMPORTANT LIFE SAVING INFORMATION WILL BE PROVIDED IN SHORT TERM FORECASTS...SEVERE WEATHER AND FLOOD WARNINGS ...AND FOLLOW-UP STATEMENTS. MCCOLLUM
Special weather statement, Aug 11, 11:15 AM MST, 1 hour 31 minutes before
TTAA00 KFGZ DDHHMM AZZ004>018-037>040-112130- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE FLAGSTAFF AZ 1115 AM MST FRI AUG 11 2000 ...STRONG THUNDERSTORMS WITH HEAVY RAIN OVER YAVAPAI COUNTY LATER THIS AFTERNOON AND EVENING... SPOTTER REPORTS OF HAIL...RAINFALL AMOUNTS...AND GUSTY WINDS REQUESTED. HIGH PRESSURE REMAINS CENTERED OVER THE FOUR CORNERS REGION WITH MOISTURE REMAINING IN PLACE ACROSS MOST OF ARIZONA. THIS WILL LEAD TO SCATTERED SHOWER AND THUNDERSTORM ACTIVITY OVER MUCH OF NORTHERN ARIZONA TODAY. THE PRIMARY AREA OF FOCUS TODAY WILL BE YAVAPAI COUNTY WHERE THE COMBINATION OF INCREASING MOISTURE AND SUNNY SKIES WILL MAKE FOR AN ACTIVE THUNDERSTORM DAY. THE FLOW ALOFT WILL PUSH THUNDERSTORMS SOUTHWARD OFF THE MOGOLLON RIM AND AS THEY MOVE INTO THE DEEPER MOISTURE ACROSS YAVAPAI COUNTY WILL STRENGTHEN. THE MAIN THREAT TODAY WILL BE FOR HEAVY RAIN AS MOISTURE VALUES WILL BE QUITE HIGH ACROSS YAVAPAI COUNTY AND STORMS WILL BE SLOW MOVING. THE HAZARDOUS WEATHER OUTLOOK GIVES PRELIMINARY INFORMATION FOR THE POSSIBILITY OF WEATHER THAT COULD BECOME SEVERE...DAMAGING WINDS IN EXCESS OF 57 MPH...HAIL 3/4 INCH IN DIAMETER OR LARGER...AND HEAVY RAINFALL THAT COULD CAUSE FLOODING OR RUNNING WASHES. WHEN HAZARDOUS WEATHER BEGINS...IMPORTANT LIFE SAVING INFORMATION WILL BE PROVIDED IN SHORT TERM FORECASTS...SEVERE WEATHER AND FLOOD WARNINGS ...AND FOLLOW-UP STATEMENTS. MCCOLLUM
The office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 11, 12:28 PM MST | Severe Thunderstorm Warning | FGZ | Coconino, Gila | 32 min |
| Aug 11, 1:32 PM MST | Severe Thunderstorm Warning | FGZ | Yavapai | 28 min |
| Aug 11, 2:06 PM MST | Severe Thunderstorm Warning | FGZ | Yavapai | 34 min |
| Aug 11, 3:45 PM MST | Severe Thunderstorm Warning | FGZ | Coconino, Gila, Yavapai | 30 min |
Nearby
Severe Thunderstorm Warnings in Arizona, 2000Every severe thunderstorm warning in 2000
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.