Alert archive / Arizona / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 56, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this severe thunderstorm warning at Sep 8, 2000, 10:46 AM MST for Coconino 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 counties it named.
The facts
- Issued
- Sep 8, 2000, 10:46 AM MST (17:46 UTC)
- Expired
- Sep 8, 2000, 11:15 AM MST
- In force
- 29 min
- Issued by
- NWS Flagstaff, AZ
- Area
- Whole counties
County Coconino County, AZ
The nearest sounding before it
Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 5.8 hours before the alert went out and 68 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
- 29 J/kg
- Mixed-layer CIN
- -195 J/kg
- Mixed-layer LCL
- 1894 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- -15 m²/s²
- 0-3 km storm-relative helicity
- 66 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS55 KFGZ 081747 SVRFLG AZC005-081815- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE FLAGSTAFF AZ 1046 AM MST FRI SEP 8 2000 THE NATIONAL WEATHER SERVICE IN FLAGSTAFF HAS EXTENDED A * SEVERE THUNDERSTORM WARNING FOR... CENTRAL COCONINO COUNTY IN ARIZONA * UNTIL 1115 AM MST * AT 1046 AM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER CENTRAL COCONINO COUNTY JUST NORTH OF THE SAN FRANCISCO PEAKS...ABOUT 35 MILES SOUTHWEST OF TUBA CITY...MOVING NORTHEAST AT 45 MPH. IF SEVERE WEATHER APPROACHES YOUR AREA...GO INSIDE A STURDY SHELTER AWAY FROM CREEK BEDS AND OTHER FLOOD-PRONE AREAS. REMEMBER...A SEVERE THUNDERSTORM CAN PRODUCE LARGE DAMAGING HAIL...DAMAGING WINDS IN EXCESS OF 58 MPH...DEADLY LIGHTNING...AND VERY HEAVY RAIN. VERY LARGE HAIL IS POSSIBLE WITH THIS SEVERE THUNDERSTORM. IF YOU ARE IN THE PATH OF THE STORM...PUT YOUR CAR IN A GARAGE AND MOVE TO A SUBSTANTIAL SHELTER. $$ LAT...LON 3574 11190 3561 11174 3581 11142 3598 11160
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 Sep 8, 9:00 AM MST, 1 hour 46 minutes earlier.
Area forecast discussion, Sep 8, 9:00 AM MST, 1 hour 46 minutes before
NORTHERN ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FLAGSTAFF AZ 900 AM MST FRI SEP 8 2000 SYNOPSIS...A TROUGH OF LOW PRESSURE WILL MOVE ACROSS NORTHWESTERN ARIZONA TODAY. EXPECT SHOWERS AND THUNDERSTORMS TO MOVE SLOWLY FROM WEST TO EAST IN YAVAPAI AND COCONINO COUNTY THIS MORNING...AND INTO NORTHEASTERN ARIZONA BY THIS AFTERNOON. THE TROUGH WILL SHIFT INTO SOUTHERN UTAH THIS LATER AFTERNOON AND TONIGHT LEADING TO PARTIAL CLEARING. LOW LEVEL MOISTURE WILL REMAIN ACROSS NORTHERN ARIZONA THROUGH THE WEEKEND FOR A CONTINUATION IN ISOLATED SHOWERS ACTIVITY EACH DAY. DISCUSSION...TWO FEATURES OR NOTE THIS MORNING...ONE BEING A S/W TROUGH MOVING INTO SW UTAH...AND AN EASTERLY WAVE MOVING INTO SE AZ. THESE TWO FEATURES TEAMED UP TO PRODUCE ENOUGH DYNAMICS TO GENERATE SOME NOCTURNAL SHOWER ACTIVITY OVER THE FCST AREA LAST NIGHT...AND IT HAS BEEN ONGOING THIS MORNING. IT APPEARS THE TROUGH OVER NW AZ HAVING THE GREATEST INFLUENCE IN GENERATING SHOWERS... BASED ON SAT IMAGERY. PESKY MOISTURE PLUME HAS REMAINED IN PLACE AND WILL HELP TO FEED CONV AS THEY SHIFT TO THE N AND EAST THROUGH THE DAY. 12Z SOUNDINGS HAVE UNDERGONE DECENT DESTABILIZATION OVER THE PAST 24 HOURS WHICH IS INDICATIVE OF CURRENT CONV ACTIVITY. FOR SHORT TERM...WILL CONT TO TRACK CONV BANDS MOVING ACROSS THE FCST AREA AND UPDATE ZNS AS NECESSARY. MCGRATH .FGZ...NONE.
In the hours before
Special weather statement, Sep 8, 9:30 AM MST, 1 hour 16 minutes before
TTAA00 KFGZ DDHHMM AZZ004>018-037>040-082030- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE FLAGSTAFF AZ 930 AM MST FRI SEP 08 2000 ...SCATTERED SHOWERS AND THUNDERSTORMS EXPECTED ACROSS NORTHERN ARIZONA TODAY... ...SPOTTER REPORTS OF HAIL AND HIGH WINDS REQUESTED... A TROUGH OF LOW PRESSURE WILL MOVE ACROSS NORTHERN ARIZONA TODAY. IN ADDITION...LOW LEVEL MOISTURE WILL CONTINUE TO FEED INTO NORTHERN ARIZONA FROM THE SOUTH. SEVERAL BANDS OF SHOWERS AND THUNDERSTORMS WILL CONTINUE TO TRACK TO THE EAST THROUGH THE AFTERNOON HOURS. THE MOST WIDESPREAD STORMS WILL OCCUR OVER COCONINO COUNTY...NORTHERN APACHE COUNTY...AND NAVAJO COUNTY. SOME STORMS WILL REACH SEVERE LIMITS AND WILL PRODUCE LARGE HAIL AND GUSTY WINDS. *********************************************************************** SEPTEMBER 15TH WILL BE THE LAST DAY THE HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED FOR THIS MONSOON SEASON. *********************************************************************** MCGRATH
Special weather statement, Sep 8, 10:36 AM MST, 10 minutes before
TTAA00 KFGZ DDHHMM AZZ004>018-037>040-082030- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE FLAGSTAFF AZ 930 AM MST FRI SEP 08 2000 ...SCATTERED SHOWERS AND THUNDERSTORMS EXPECTED ACROSS NORTHERN ARIZONA TODAY... ...SPOTTER REPORTS OF HAIL AND HIGH WINDS REQUESTED... A TROUGH OF LOW PRESSURE WILL MOVE ACROSS NORTHERN ARIZONA TODAY. IN ADDITION...LOW LEVEL MOISTURE WILL CONTINUE TO FEED INTO NORTHERN ARIZONA FROM THE SOUTH. SEVERAL BANDS OF SHOWERS AND THUNDERSTORMS WILL CONTINUE TO TRACK TO THE EAST THROUGH THE AFTERNOON HOURS. THE MOST WIDESPREAD STORMS WILL OCCUR OVER COCONINO COUNTY...NORTHERN APACHE COUNTY...AND NAVAJO COUNTY. SOME STORMS WILL REACH SEVERE LIMITS AND WILL PRODUCE LARGE HAIL AND GUSTY WINDS. *********************************************************************** SEPTEMBER 15TH WILL BE THE LAST DAY THE HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED FOR THIS MONSOON SEASON. ***m******************************************************************** MCGRATH
The office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 8, 10:18 AM MST | Severe Thunderstorm Warning | FGZ | Coconino | 27 min |
| Sep 8, 11:15 AM MST | Severe Thunderstorm Warning | FGZ | Coconino | 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.